LG ARUM241DTE5 Air Conditioners User Manual

INSTALLATION MANUAL

AIR

CONDITIONER

Please read this installation manual completely before installing the product.

Installation work must be performed in accordance with the national wiring standards

by authorized personnel only.

Please retain this installation manual for future reference after reading it thoroughly.

For Heat Pump / Heat Recovery system

Original instruction

MFL68980308

Rev.01_110718

www.lghvac.com

www.lg.com

ENGLISH

FRANÇAIS

ESPAÑOL

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 1

ENGLISH

TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption

when you use the air conditioner. You can use your air conditioner

more efficiently by referring to the instructions below:

IMPORTANT SAFETY

INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE

APPLIANCE.

Always comply with the following precautions to avoid dangerous

situations and ensure peak performance of your product.

WARNING

It can result in serious injury or death when the directions are ignored.

CAUTION

It can result in minor injury or product damage when the directions are

ignored.

WARNING

• Installation or repairs made by unqualified persons can result in

hazards to you and others. Installation of all field wiring and

components MUST conform with local building codes or, in the

absence of local codes, with the National Electrical Code 70 and the

National Building Construction and Safety Code or Canadian

Electrical code and National Building Code of Canada.

• The information contained in the manual is intended for use by a

qualified service technician familiar with safety procedures and

equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can

result in equipment malfunction, property damage, personal injury

and/or death.

Installation

• Have all electric work done by a licensed electrician according to

"Electric Facility Engineering Standard" and "Interior Wire Regulations"

and the instructions given in this manual and always use a special

circuit.

- If the power source capacity is inadequate or electric work is

performed improperly, electric shock or fire may result.

• Ask the dealer or an authorized technician to install the air conditioner.

- Improper installation by the user may result in water leakage, electric

shock, or fire.

• Always ground the product.

- There is risk of fire or electric shock.

• Always intstall a dedicated circuit and breaker.

- Improper wiring or installation may cause fire or electric shock.

• For re-installation of the installed product, always contact a dealer or an

Authorized Service Center.

- There is risk of fire, electric shock, explosion, or injury.

• Do not install, remove, or re-install the unit by yourself (customer).

- There is risk of fire, electric shock, explosion, or injury.

• Do not store or use flammable gas or combustibles near the air

conditioner.

- There is risk of fire or failure of product.

• Use the correctly rated breaker or fuse.

- There is risk of fire or electric shock.

• Prepare for strong wind or earthquake and install the unit at the

specified place.

- Improper installation may cause the unit to topple and result in injury.

• Do not install the product on a defective installation stand.

- It may cause injury, accident, or damage to the product.

• Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or

air purge. Do not compress air or Oxygen and do not use Flammable

gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

• When installing and moving the air conditioner to another site, do not

charge it with a different refrigerant from the refrigerant specified on the

unit.

- If a different refrigerant or air is mixed with the original refrigerant, the

refrigerant cycle may malfunction and the unit may be damaged.

• Do not reconstruct to change the settings of the protection devices.

- If the pressure switch, thermal switch, or other protection device is

shorted and operated forcibly, or parts other than those specified by

LGE are used, fire or explosion may result.

• Ventilate before operating air conditioner when gas leaked out.

- It may cause explosion, fire, and burn.

• Securely install the cover of control box and the panel.

- If the cover and panel are not installed securely, dust or water may

enter the outdoor unit and fire or electric shock may result.

• If the air conditioner is installed in a small room, measures must be

taken to prevent the refrigerant concentration from exceeding the safety

limit when the refrigerant leaks.

- Consult the dealer regarding the appropriate measures to prevent the

safety limit from being exceeded. Should the refrigerant leak and cause

the safety limit to be exceeded, harzards due to lack of oxygen in the

room could result.

Operation

• Do not damage or use an unspecified power cord.

- There is risk of fire, electric shock, explosion, or injury.

• Use a dedicated outlet for this appliance.

- There is risk of fire or electrical shock.

• Be cautious that water could not enter the product.

- There is risk of fire, electric shock, or product damage.

• Do not touch the power switch with wet hands.

- There is risk of fire, electric shock, explosion, or injury.

• When the product is soaked (flooded or submerged), contact an

Authorized Service Center.

- There is risk of fire or electric shock.

• Be cautious not to touch the sharp edges when installing.

- It may cause injury.

• Take care to ensure that nobody could step on or fall onto the outdoor

unit.

- This could result in personal injury and product damage.

• Do not open the inlet grille of the product during operation. (Do not

touch the electrostatic filter, if the unit is so equipped.)

- There is risk of physical injury, electric shock, or product failure.

• Do not cool excessively indoors. This may be harmful for your health

and may consume more electricity.

• Block sunlight with blinds or curtains while you are operating the air

conditioner.

• Keep doors or windows closed tightly while you are operating the air

conditioner.

• Adjust the direction of the air flow vertically or horizontally to circulate

indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period

of time.

• Open windows regularly for ventilation as the indoor air quality may

deteriorate if the air conditioner is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected

in the air filter may block the air flow or weaken the cooling /

dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of

purchase or for warranty purposes. Write the model number and the

serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 2

CAUTION

Installation

• Always check for gas (refrigerant) leakage after installation or repair of

product.

- Low refrigerant levels may cause failure of product.

• Do not install the product where the noise or hot air from the outdoor

unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the unit where combustible gas may leak.

- If the gas leaks and accumulates around the unit, an explosion may

result.

• Use power cables of sufficient current carrying capacity and rating.

- Cables that are too small may leak, generate heat, and cause a fire.

• Do not use the product for special purposes, such as preserving foods,

works of art, etc. It is a consumer air conditioner, not a precision

refrigeration system.

- There is risk of damage or loss of property.

• Keep the unit away from children. The heat exchanger is very sharp.

- It can cause the injury, such as cutting the finger. Also the damaged fin

may result in degradation of capacity.

• When installting the unit in a hospital, communication station, or similar

place, provide sufficient protection against noise.

- The inverter equipment, private power generator, high-frequency

medical equipment, or radio communication equipment may cause the

air conditioner to operate erroneously, or fail to operate. On the other

hand, the air conditioner may affect such equipment by creating noise

that disturbs medical treatment or image broadcasting.

• Do not install the product where it is exposed to sea wind (salt spray)

directly.

- It may cause corrosion on the product. Corrosion, particularly on the

condenser and evaporator fins, could cause product malfunction or

inefficient operation.

Operation

• Do not use the air conditioner in special environments.

- Oil, steam, sulfuric smoke, etc. can significantly reduce the

performance of the air conditioner or damage its parts.

• Do not block the inlet or outlet.

- It may cause failure of appliance or accident.

• Make the connections securely so that the outside force of the cable

may not be applied to the terminals.

- Inadequate connection and fastening may generate heat and cause a

fire.

• Be sure the installation area does not deteriorate with age.

- If the base collapses, the air conditioner could fall with it, causing

property damage, product failure, or personal injury.

• Install and insulate the drain hose to ensure that water is drained away

properly based on the installation manual.

- A bad connection may cause water leakage.

• Be very careful about product transportation.

- Only one person should not carry the product if it weighs more than

20 kg (44 lbs).

- Some products use PP bands for packaging. Do not use any PP bands

for a means of transportation. It is dangerous.

- Do not touch the heat exchanger fins. Doing so may cut your fingers.

- When transporting the outdoor unit, suspending it at the specified

positions on the unit base. Also support the outdoor unit at four points

so that it cannot slip sideways.

• Safely dispose of the packing materials.

- Packing materials, such as nails and other metal or wooden parts, may

cause stabs or other injuries.

- Tear apart and throw away plastic packaging bags so that children may

not play with them. If children play with a plastic bag which was not

torn apart, they face the risk of suffocation.

• Turn on the power at least 6 hours before starting operation.

- Starting operation immediately after turning on the main power switch

can result in severe damage to internal parts. Keep the power switch

turned on during the operational season.

• Do not touch any of the refrigerant piping during and after operation.

- It can cause a burn or frostbite.

• Do not operate the air conditioner with the panels or guards removed.

- Rotating, hot, or high-voltage parts can cause injuries.

• Do not directly turn off the main power switch after stopping operation.

- Wait at least 5 minutes before turning off the main power switch.

Otherwise it may result in water leakage or other problems.

• Auto-addressing should be done in condition of connecting the power of

all indoor and outdoour units. Auto-addressing should also be done in

case of changing the indoor unit PCB.

• Use a firm stool or ladder when cleaning or maintaining the air

conditioner.

- Be careful and avoid personal injury.

• Do not insert hands or other objects through the air inlet or outlet while

the air conditioner is plugged in.

- There are sharp and moving parts that could cause personal injury.

ENGLISH

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 3

ENGLISH

52 High Efﬁciency Mode (Cooling Operation) (Fn 10)

52 Auto Dust Removal Mode (Fn 11)

53 Compressor Max. Frequency Limit (Fn 12)

53 ODU Fan Max. RPM Limit (Fn 13)

53 SLC (Smart Load Control) (Fn 14)

53 Humidity Reference Control (Fn 16)

54 Central Control Connection at Indoor Unit side (Fn 19)

54 Compressor Input Current Limit Mode (Fn 20)

54 Overall Defrost Operating in Low temperature (Heating) (Fn 22)

54 Base pan Heater operation (Fn 23)

55 Comfort Cooling operation (Id 10)

56 Self-Diagnosis Function

58 CAUTION FOR REFRIGERANT LEAK

58 Introduction

58 Checking procedure of limiting concentration

59 INSTALLATION GUIDE AT THE SEASIDE

60 Model Designation

2 TIPS FOR SAVING ENERGY

2 IMPORTANT SAFETY INSTRUCTIONS

5 INSTALLATION PROCESS

5 OUTDOOR UNITS INFORMATION

5 ALTERNATIVE REFRIGERANT R410A

5 SELECT THE BEST LOCATION

7 INSTALLATION SPACE

7 Individual Installation

7 LIFTING METHOD

8 INSTALLATION

8 The location of the Anchor bolts

8 Foundation for Installation

8 Preparation of Piping

10 Plumbing materials and storage methods

11 REFRIGERANT PIPING INSTALLATION

11 Precautions on Pipe connection / Valve operation

11 Connection of Outdoor units

12 Installation procedure for HR unit

12 Installation of Outdoor Unit, HR Unit, Indoor Unit Refrigerant

Pipe

12 Type of HR Unit

13 Installation of Zoning Control

14 Caution

14 Precautions on Pipe connection / Valve operation

15 Connection of Outdoor units

15 Caution

16 PIPE CONNECTIONS BETWEEN INDOOR

AND OUTDOOR UNIT

16 Preparation Work

17 Pipe Drawing Out during Single / Series connection

17 Refrigerant piping system

19 Preparation Work

20 Pipe Drawing Out during Single / Series connection

20 Refrigerant piping system

21 Series Outdoor Units (2 Units ~ 3 Units)

21 Pipe Connection Method between outdoor unit/indoor unit

25 Refrigerant charging

25 Branch pipe Fitting

29 Distribution Method

29 Vacuum Mode

30 Leak Test and Vacuum drying

31 Thermal insulation of refrigerant piping

32 ELECTRICAL WIRING

32 Caution

33 Control box and connecting position of wiring

33 Communication and Power Cables

34 Wiring of main power supply and equipment capacity

34 Field Wiring

38 Checking the setting of outdoor units

40 Switch for setup of HR Unit

44 Automatic Addressing

45 The Procedure of Automatic Addressing

46 Flow chart of auto pipe detection Process

47 Flow chart of manual addressing for pipe detection

47 Example of manual valve addressing (Non-Zoning setting)

48 Example of manual valve addressing (Zoning setting)

48 Method of checking the pipe detection result at HR unit

48 Identiﬁcation of Manual Valve ID (Address)

48 Method of checking the pipe detection result at outdoor unit

48 Setting method of Master indoor unit in zoning

49 Group Number setting

50 Cool & Heat selector (Fn 1)

50 High Static Pressure Compensation mode (Fn 2)

50 Night Low Noise Function (Fn 3)

51 Overall HEX defrost mode (Fn 4)

51 Setting the ODU address (Fn 5)

51 Snow removal & rapid defrost (Fn 6)

52 Target pressure adjusting (Fn 8)

52 Low Ambient Kit (Fn 9)

TABLE OF CONTENTS

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 4

• The wall thickness of the piping should comply with the relevant

local and national regulations for the designed pressure 3.8 MPa

[551.1 psi]

• Since R410A is a mixed refrigerant, the required additional

refrigerant must be charged in its liquid state.

If the refrigerant is charged in its gaseous state, its composition

changes and the system will not work properly.

• Do not place the refrigerant container under the direct rays of

the sun to prevent it from exploding.

• For high-pressure refrigerant, any unapproved pipe must not be

used.

• Do not heat pipes more than necessary to prevent them from

softening.

• Be careful not to install wrongly to minimize economic loss

because it is expensive in comparison with R22.

CAUTION

ENGLISH

SELECT THE BEST LOCATION

Select space for installing outdoor unit, which will meet the following

conditions:

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors due to noise of unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• Because of the possibility of fire, do not install unit to the space

where generation, inflow, stagnation, and leakage of combustible gas

is expected.

ALTERNATIVE REFRIGERANT R410A

The refrigerant R410A has the property of higher operating pressure in

comparison with R22.

Therefore, all materials have the characteristics of higher resisting

pressure than R22 ones and this characteristic should also be

considered during the installation.

R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone

depletion potential (ODP) of R410A is 0.

Notes : * We can guarantee the operation only within 130 %

combination.

Combination Ratio(50~130 %)

Outdoor Number Connection Capacity

Single outdoor units

130 %Double outdoor units

Triple outdoor units

OUTDOOR UNITS INFORMATION

The foundation must be level even

Outdoor unit foundation work

Avoid short circuits and ensure

sufﬁcient space is allowed for service

Installation of outdoor unit

Refer to automatic addressing ﬂowchart

Automatic addressing of indoor unit

In the ﬁnal check for 24 hours at 3.8 MPa (38.7 kgf/cm

)[551.1 psi]

there must be no drop in pressure.

Airtight test

Multiple core cable must not be used.

(suitable cable should be selected)

Electrical work

(connection circuits and drive circuits)

Make sure no gaps are left where

the insulating materials are joined

Heat insulation work

Make sure airﬂow is sufﬁcient

Duct work

Adjust to downward gradient

Drain pipe work

Special attention to dryness,

cleanness and tightness

Refrigerant piping work

Check model name to

make sure the ﬁtting

is made correctly

Installation of indoor unit

Take account of gradient

of drain piping

Sleeve and insert work

Make connection clearly between outdoor, indoor,

remote controller and option.

Preparation of contract drawings

Indicate clearly who will be responsible for switch setting.

Determination of division work

The vacuum pump used must have a capacity of reaching at least

5 torr, more than 1 hour

Vacuum drying

Recharge correctly as calculated in this manual. and record the

amount of added refrigerant

Additional charge of refrigerant

Make sure there are no gaps left between the facing materials

used on the ceiling

Fit facing panels

Run each indoor unit in turn to make sure the pipe work

has been ﬁtted correctly

Test run adjustment

Explain the use of the system as clearly as possible to your customer and

make sure all relevant documentation is in order

Transfer to customer with explanation

Preheat the crank case with the electrical heater for more than 6 hours.

INSTALLATION PROCESS

CAUTION

• The above list indicates the order in which the individual work

operations are normally carried out but this order may be varied

where local conditions warrants such change.

• The thickness of the piping should comply with the relevant local

and national regulations for the designed pressure 3.8 MPa

(551.1 psi).

• Since R410A is a mixed refrigerant, the required additional

refrigerant must be charged in its liquid state.(If the refrigerant is

charged in its gaseous state, its composition changes and the

system will not work properly.)

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 5

ENGLISH

Select installation location of the HR unit suitable for following

conditions

- Avoid a place where rain may enter since the HR unit is for indoor.

- Sufficient service space must be obtained.

- Refrigerant pipe must not exceed limited length.

- Avoid a place subject to a strong radiation heat from other heat

source.

- Avoid a place where oil spattering, vapor spray or high frequency

electric noise is expected.

- Install the unit at a place in which it is not affected by operation noise.

(Installation within cell such as meeting room etc. may disturb

business due to noise.)

- Place where refrigerant piping, drain piping and electrical wiring

works are easy.

2 Series

• Avoid unit installation in a place where acidic solution and spray

(sulfur) are often used.

• Do not use unit under any special environment where oil, steam and

sulfuric gas exist.

• It is recommended to fence round the outdoor unit in order to

prevent any person or animal from accessing the outdoor unit.

• If installation site is area of heavy snowfall, then the following

directions should be observed.

- Make the foundation as high as possible.

- Fit a snow protection hood.

• Select installation location considering following conditions to avoid

bad condition when additionally performing defrost operation.

- Install the outdoor unit at a place well ventilated and having a lot of

sunshine in case of installing the product at a place With a high

humidity in winter (near beach, coast, lake, etc.)

(Ex : Rooftop where there is always sunshine.)

3 Series

■ Unit: mm(inch)

No. Part Name

Description

PRHR042A

PRHR032A

PRHR083A

PRHR063A

PRHR043A

PRHR033A

PRHR022A

PRHR023A

Low pressure Gas

pipe connection port

Ø 28.58 (1-1/8)

Brazing connection

Ø 22.2 (7/8) Brazing

connection

High pressure Gas

pipe connection port

Ø 22.2 (7/8) Brazing

connection

Ø 19.05 (3/4) Brazing

connection

Liquid pipe

connection port

Ø 15.88 (5/8) Brazing

connection

(PRHR042A)

Ø 9.52 (3/8) Brazing

connection

Ø 12.7 (1/2) Brazing

connection

(PRHR032A)

Indoor unit Gas pipe

connection port

Ø 15.88 (5/8) Brazing

connection

Ø 15.88 (5/8) Brazing

connection

Indoor unit Liquid

pipe connection port

Ø 9.52 (3/8) Brazing

connection

Ø 9.52 (3/8) Brazing

connection

6 Control box - -

7 Hanger metal M10 or M8 M10 or M8

NOTE

• Be sure to install the inspection door at the control box side.

• If reducers are used, servicing space must be increased equal to

reducer's dimension.

For Heat Recovery Installation

419 (16-1/2)

(2-13/32)

137

(5-13/32)

124 (4-7/8)

128 (5-1/32)

(1-3/16)

(2-3/8)

More than

300 (11-13/16)

(Servicing space)

More than

450 (17-23/32)

(Servicing space)

More than 100 (3-15/16)

(Servicing space)

More than 100 (3-15/16)

(Servicing space)

More than 100 (3-15/16)

(Servicing space)

More than

300 (11-13/16)

More than

300 (11-13/16)

(Servicing space) (Servicing space)

More than 100 (3-15/16)

(Servicing space)

453 (17-27/32)

174

(6-27/32)

174

(6-27/32)

182

(7-5/32)

218 (8-19/32)

Inspection door

(servicing space)

481 (18-15/16)

450 (17-23/32)

345 (13-19/32)

300(11-13/16)

300(11-13/16) more

300(11-13/16)

254(10)

(Servicing space) (Servicing space)

(Servicing space)

500(19-11/16)

311(12-1/4)

6(1/4) more (Serviceing space)

126(4-31/32)

147(5-23/32)

19(3/4)

55(2-5/32)

389(15-5/16)

(3-5/8)

176(6-15/16)

Inspection door

(servicing space)

500(19-11/16)

254(10)

150(5-29/32) 486(19-1/8) 150(5-29/32)

165(6-1/2)

218(8-19/32)

300(11-13/16) more

300(11-13/16)

254(10)

(Servicing space) (Servicing space)

(Servicing space)

311(12-1/4)

809(31-27/32)

793(31-7/32)

160

(6-5/16)

160

(6-5/16)

218(8-19/32)

165

(6-1/2)

19(3/4)

55(2-5/32)

389(15-5/16)

92(3-5/8)

176(6-15/16)

147(5-23/32)

126(4-31/32)

254(10)

Inspection door

(servicing space)

800(31-1/2)

6(1/4) more (Serviceing space)

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 6

Limitati

ons on

the

height

of the

wall

(Refer

to 4

side

walls)

1500 (59)

Inlet

side

50500

(19-11/16’’)(19-11/16’’)

500

(19-11/16’’)

Front

side

500

(19-11/16’’)

240

(9-1/2’’)

or more

50 (2) or more

45° or

• The height of the wall on the front side must

be 1500 mm (59 inch) or less.

• The height of the wall on the inlet side must

be 500 mm (19-11/16’’) or less.

• There is no limit to the wall on Inlet side.

• If the height of the walls on the front and Inlet

side are higher than the limit, there must be

additional space on the front and the side.

- Additional Space on the front side by 1/2 of

- Additional Space on the inlet side by 1/2 of

- h1 = A(Actual height) - 1500 (59 inch)

- h2 = B(Actual height) - 500 (19-11/16’’)

ENGLISH

During the installation of the unit, consider service, inlet, and outlet

acquire the minimum space as shown in the figures below.

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow areas or severe cold

areas in winter so that product can be operated well.

• Get ready for seasonal wind or snow in winter even in other areas.

• Install a suction and discharge duct not to let in snow or rain.

• Install the outdoor unit in such a way that it should not come in

contact with snow directly.

If snow piles up and freezes on the air suction hole, the system may

malfunction. If it is installed at snowy area, attach the hood to the

system.

• Install the outdoor unit at the higher installation console by 50 cm

(19.7 inch) than the average snowfall (annual average snowfall) if it is

installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by

more than 10 cm (3.9 inch), always remove snow for operation.

- The height of H frame must be more than 2 times the snowfall

and its width shall not exceed the width of the product. (If width

of the frame is wider than that of the product, snow may

accumulate)

- Don't install the suction hole and discharge hole of the Outdoor

Unit facing the seasonal wind.

• When carrying the suspended, unit pass the ropes under the unit and

use the two suspension points each at the front and rear.

• Always lift the unit with ropes attached at four points so that impact

is not applied to the unit.

• Attach the ropes to the unit at an angle of 40° or less.

Locking points for

transportation ropes

Forklift Carrying Guide

Forklift Carrying Hole

LIFTING METHOD

Individual Installation

INSTALLATION SPACE

Category

Installation Space

Case 1

(10 mm(13/32 inch)≤Side

Space≤49 mm(13/14 inch))

Case 2

(Side Space

≥49 mm(13/14 inch))

4 sides

are

walls

A≥10 (13/32)

B≥300 (11-13/16)

C≥10 (13/32)

D≥500 (19-11/16)

A≥50 (1-31/32)

B≥100 (3-15/16)

C≥50 (1-31/32)

D≥500(19-11/16)

A≥10 (13/32)

B≥300 (11-13/16)

C≥10 (13/32)

D≥500 (19-11/16)

E≥20 (25/32)

A≥50 (1-31/32)

B≥100 (3-15/16)

C≥50 (1-31/32)

D≥500 (19-11/16)

E≥100 (3-15/16)

A≥10 (13/32)

B≥500 (19-11/16)

C≥10 (13/32)

D≥500 (19-11/16)

E≥20 (25/32)

F≥900 (35-7/16)

A≥50 (1-31/32)

B≥100 (3-15/16)

C≥50 (1-31/32)

D≥500 (19-11/16)

E≥100 (3-15/16)

F≥500 (19-11/16)

A≥10 (13/32)

B≥300 (11-13/16)

C≥10 (13/32)

D≥300 (11-13/16)

E≥20 (25/32)

F≥500 (19-11/16)

A≥50 (1-31/32)

B≥100 (3-15/16)

C≥50 (1-31/32)

D≥100 (3-15/16)

E≥100 (3-15/16)

F≥500 (19-11/16)

Rear

A≥10 (13/32)

B≥500 (19-11/16)

C≥10 (13/32)

D≥500 (19-11/16)

F≥900 (35-7/16)

A≥50 (1-31/32)

B≥500 (19-11/16)

C≥50 (1-31/32)

D≥500 (19-11/16)

F≥600 (23-5/8)

A≥10 (13/32)

B≥500 (19-11/16)

C≥10 (13/32)

D≥500 (19-11/16)

E≥20 (25/32)

F≥1200 (47-1/4)

A≥50 (1-31/32)

B≥500 (19-11/16)

C≥50 (1-31/32)

D≥500 (19-11/16)

E≥100 (3-15/16)

F≥900 (35-7/16)

A≥10 (13/32)

B≥500 (19-11/16)

C≥10 (13/32)

D≥500 (19-11/16)

E≥20 (25/32)

F≥1800 (70-7/8)

A≥50 (1-31/32)

B≥500 (19-11/16)

C≥50 (1-31/32)

D≥500 (19-11/16)

E≥100 (3-15/16)

F≥1200 (47-1/4)

Only 2

sides

are

walls

A≥10 (13/32)

B≥300 (11-13/16)

A≥10 (13/32)

B≥300 (11-13/16)

E≥20 (25/32)

500

(19-11/16’’)

DHHF

500

(19-11/16’’)

DHF

500

(19-11/16’’)

DHF

500

(19-11/16’’)

500

(19-11/16’’)

DHF

500

(19-11/16’’)

DHHF

500

(19-11/16’’)

500

(19-11/16’’)

DHH

500

(19-11/16’’)

Front

Front Front

Front

Front Front

Front Front Front

Front

Front Front

No limit for the

height of wall

No limit for the height of wall

Front

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than

20 kg (44 lbs).

• PP bands are used to pack some products. Do not use them as

a mean for transportation because they are dangerous.

• Do not touch heat exchanger fins with your bare hands.

Otherwise you may get a cut in your hands.

• Tear plastic packaging bag and scrap it so that children cannot

play with it. Otherwise plastic packaging bag may suffocate

children to death.

• When carrying in Outdoor Unit, be sure to support it at four

points. Carrying in and lifting with 3-point

support may make Outdoor Unit unstable, resulting in a fall.

• Use 2 belts of at least 8 m (26.2 ft) long.

• Place extra cloth or boards in the locations where the casing

comes in contact with the sling to prevent damage.

•

Hoist the unit making sure it is being lifted at its center of gravity.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 7

ENGLISH

• Install at places where it can endure the weight and vibration/noise

of the outdoor unit.

• The outdoor unit support blocks at the bottom shall have width of at

least 100 mm (3-15/16 inch) under the Unit’s legs before being fixed.

• The outdoor unit support blocks should have minimum height of 200

mm (7-7/8 inch).

• Anchor bolts must be inserted at least 75 mm (2-15/16 inch).

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

At least 100 mm

(3-15/16 inch)

Outdoor units

should not be

supported only by

the corner supports.

Center of the Unit

Chassis A [mm (inch)] B [mm (inch)]

UXA 930 (36-5/8) 748 (29-9/20)

UXB 1 240 (47-1/4) 1 040 (40-15/16)

• Fix the unit tightly with bolts as shown below so that unit will not fall

down due to earthquake or gust.

• Use the H-beam support as a base support

• Noise and vibration may occur from the floor or wall since vibration is

transferred through the installation part depending on installation

status. Thus, use anti-vibration materials (cushion pad) fully (The base

pad shall be more than 200 mm (7-7/8 inch)).

At least

200(7-7/8)

760 (29-29/32)

731 (28-25/32)

(2-9/16)

Unit : mm (inch)

At least

65 (2-9/16)

At least

65 (2-9/16)

Unit : mm (inch)

200(7-7/8)

75(2-15/16)

200(7-7/8)

100(3-15/16)

Ⓐ The corner part must be fixed firmly. Otherwise, the support for the

installation may be bent.

Ⓑ Get and use M10 Anchor bolt.

the vibration protection in wide area.

Ⓓ Space for pipes and wiring (Pipes and wirings for bottom side)

Ⓔ H-beam support

Ⓕ Concrete support

WARNING

• Install where it can sufficiently support the weight of the

outdoor unit.

If the support strength is not enough, the outdoor unit may drop

and hurt people.

• Install where the outdoor unit may not fall in strong wind or

earthquake.

If there is a fault in the supporting conditions, the outdoor unit

may fall and hurt people.

• Please take extra cautions on the supporting strength of the

ground, water outlet treatment(treatment of the water flowing

out of the outdoor unit in operation), and the passages of the

pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base panel. Use

drainage instead for water outlet. The tube or pipe may freeze

and the water may not be drained.

Main cause of gas leakage is defect in flaring work. Carry out correct

flaring work in the following procedure.

Cut the pipes and the cable

- Use the accessory piping kit or the pipes purchased locally.

- Measure the distance between the indoor and the outdoor unit.

- Cut the pipes a little longer than measured distance.

- Cut the cable 1.5 m (4.92 ft) longer than the pipe length.

Preparation of Piping

Pipe

Reamer

Point down

Copper

tube

90°

Slanted Uneven Rough

Foundation for Installation

The location of the Anchor bolts

INSTALLATION

• Be sure to remove the Pallet(Wood Support) of the bottom side

of the outdoor unit Base panel before fixing the bolt. It may

cause the unstable state of the outdoor settlement, and may

cause freezing of the heat exchanger resulting in abnormal

operations.

• Be sure to remove the Pallet(Wood Support) of the bottom side

of the outdoor unit before welding. Not removing Pallet(Wood

Support) causes hazard of fire during welding.

CAUTION

Pallet(Wood Support)

- Remove before Installation

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 8

ENGLISH

Flaring work

- Carry out flaring work using flaring tool as shown below.

Firmly hold copper tube in a bar(or die) as indicated dimension in the

table above.

Check

- Compare the flared work with figure below.

- If flare is noted to be defective, cut off the flared section and do

flaring work again.

Burrs removal

- Completely remove all burrs from the cut cross section of pipe/tube.

- Put the end of the copper tube/pipe to downward direction as you

remove burrs in order to avoid to let burrs drop in the tubing.

Bar

Copper pipe

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Flare shape and ﬂare nut tightening torque

Opening shutoff valve

Precautions when connecting pipes

- See the following table for flare part machining dimensions.

- When connecting the flare nuts, apply refrigerant oil to the inside and

outside of the flares and turn them three or four times at first. (Use

ester oil or ether oil.)

See the following table for tightening torque.(Applying too much torque may

cause the flares to crack.)

- After all the piping has been connected, use nitrogen to perform a

gas leak check.

1 Remove the cap and turn the valve counter clockwise with the

hexagon wrench.

2 Turn it until the shaft stops.

Do not apply excessive force to the shutoff valve. Doing so may

break the valve body, as the valve is not a backseat type. Always

use the special tool.

3 Make sure to tighten the cap securely.

Pipe size

[mm (inch)]

Tightening Torque

m (lbs

ft)

A [mm (inch)] Flare shape

Ø 9.52 (3/8) 38±4 (28±3.0) 12.8 (0.5)~13.2 (0.52)

90°

±2

5°

R=0.4~0.8

Ø 12.7 (1/2) 55±6 (41±4.4) 16.2 (0.64)~16.6 (0.65)

Ø 15.88 (5/8) 75±7 (55±5.2) 19.3 (0.76)~19.7(0.78)

Insulation of shutoff valve

1 Use the heat insulation material for the refrigerant piping which has

an excellent heat-resistance (over 120 °C [248 °F]).

2 Precautions in high humidity circumstance:

This air conditioner has been tested according to the "ISO

Conditions with Mist" and confirmed that there is not any default.

However, if it is operated for a long time in high humid atmosphere

(dew point temperature: More than 23 °C [73.4 °F]), water drops

are liable to fall. In this case, add heat insulation material according

to the following procedure:

- Heat insulation material to be prepared:

EPDM (Ethylene Propylene Diene Methylene)-over 120 °C

[248 °F] the heat-resistance temperature.

- Add the insulation over 10 mm [0.39 inch] thickness at high

humidity environment.

Indoor unit

Thermal insulator

(accessory)

Fastening band

(accessory)

Refrigerant piping

Closing shutoff valve

1 Remove the cap and turn the valve clockwise with the hexagon

wrench.

2 Securely tighten the valve until the shaft contacts the main body seal.

3 Make sure to tighten the cap securely.

* For the tightening torque, refer to the table on the below.

Tightening torque

Shut

off

valve

size

(mm

(inch))

Tightening torque N

m (lbs

ft) (Turn clockwise to close)

Shaft

(valve body)

Cap

(Valve lid)

Service

port

Flare nut

Gas line

piping

attached

to unit

Closed Opened

Hexagonal

wrench

Ø 6.35

(1/4)

6.0±0.6

(4.4±0.4)

5.0±0.0

(3.7±0.4)

4 mm

(0.16 inch)

17.6±2.0

(13.0±1.5)

12.7±2

(9.4±1.5)

16±2

(12±1.5)

Ø 9.52

(3/8)

38±4

(28±3.0)

Ø 12.7

(1/2)

10.0±1.0

(7.4±0.7)

20.0±2.0

(14.8±1.5)

55±6

(41±4.4)

Ø 15.88

(5/8)

12.0±1.2

(8.9±0.9)

5 mm

(0.24 inch)

25.0±2.5

(18.4±1.8)

75±7

(55±5.1)

Ø 19.05

(3/4)

14.0±1.4

(10.3±1.0)

110±10

(81.1±7.4)

Ø 22.2

(7/8)

30.0±3.0

(22.1±2.2)

8 mm

(0.31 inch)

Ø 25.4

(1)

25±3

(18.5±2.2)

Pipe diameter

Inch (mm)

A inch (mm)

Wing nut type Clutch type

Ø 1/4 (Ø 6.35)

0.04~0.07 (1.1~1.8) 0~0.02 (0~0.5)

Ø 3/8 (Ø 9.52)

Ø 1/2 (Ø 12.7)

Ø 5/8 (Ø 15.88)

• Always use a charge hose for service port connection.

•

After tightening the cap, check that no refrigerant leaks are present

• When loosening a flare nut, always use two wrenches in

combination, When connecting the piping,

always use a spanner and torque wrench

in combination to tighten the flare nut.

• When connecting a flare nut, coat the

flare(inner and outer faces) with oil for

R410A(PVE) and hand tighten the nut

3 to 4 turns as the initial tightening.

CAUTION

Union

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 9

ENGLISH

Refrigerant piping on three principles

Drying Cleanliness Airtight

Should be no

moisture inside

No dust inside.

There is no refrigerant

leakage

Items

Moisture

Dust

Leakage

Cause failure

- Significant

hydrolysis of

refrigerant oil

- Degradation of

refrigerant oil

- Poor insula’tion of

the compressor

- Do not cold and

warm

- Clogging of EEV,

Capillary

- Degradation of

refrigerant oil

- Poor insulation of

the compressor

- Do not cold and

warm

- Clogging of EEV,

Capillary

- Gas shortages

- Degradation of

refrigerant oil

- Poor insulation of

the compressor

- Do not cold and

warm

Countermeasure

- No moisture in the

pipe

- Until the

connection is

completed, the

plumbing pipe

entrance should be

strictly controlled.

- Stop plumbing at

rainy day.

- Pipe entrance

should be taken

side or bottom.

- When removal burr

after cutting pipe,

pipe entrance

should be taken

down.

- Pipe entrance

should be fitted

cap when pass

through the walls.

- No dust in the

pipe.

- Until the

connection is

completed, the

plumbing pipe

entrance should be

strictly controlled.

- Pipe entrance

should be taken

side or bottom.

- When removal burr

after cutting pipe,

pipe entrance

should be taken

down.

- Pipe entrance

should be fitted

cap when pass

through the walls.

- Airtightness test

should be.

- Brazing operations

to comply with

standards.

- Flare to comply

with standards.

- Flange connections

to comply with

standards.

Nitrogen substitution method

Welding, as when heating without nitrogen substitution a large

amount of the oxide film is formed on the internal piping.

The oxide film is a caused by clogging EEV, Capillary, oil hole of

accumulator and suction hole of oil pump in compressor.

It prevents normal operation of the compressor.

In order to avoid this problem, Welding should be done after replacing

air by nitrogen gas.

When welding plumbing pipe, the work is required.

Regulator

Nitrogen gas

Pressure 0.02 MPa

(2.9 psi) less

Auxiliary valve

Taping

(Should not

contain air)

Welding Point

Note) should not block the outlet side.

When the internal pressure in pipe is abo

ve the atmospheric pressure, pinhole is

occurred and it is a leakage cause.

Oxide scale

Nitrogen

Plumbing materials and storage methods

Pipe must be able to obtain the specified thickness and should be

used with low impurities.

Also when handling storage, pipe must be careful to prevent a

fracture, deformity and wound.

Should not be mixed with contaminations such as dust, moisture.

• Always use the nitrogen.(not use oxygen, carbon dioxide, and a

Chevron gas): Please use the following nitrogen pressure 0.02 MPa

(2.9 psi) Oxygen - Promotes oxidative degradation of refrigerant oil.

Because it is flammable, it is strictly prohibited to use Carbon

dioxide - Degrade the drying characteristics of gas Chevron Gas -

Toxic gas occurs when exposed to direct flame.

•

Always use a pressure reducing valve.

•

Please do not use commercially available antioxidant.

The residual material seems to be the oxide scale is observed. In

fact, due to the organic acids generated by oxidation of the

alcohol contained in the anti-oxidants, ants nest corrosion

occurs. (causes of organic acid → alcohol + copper + water +

temperature)

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 10

ENGLISH

Service Port

Low Pressure Gas pipe

Liquid pipe

High Pressure Gas pipe

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body

if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas

leakage after the work.

For Heat Recovery System Installation

A≥B≥C

① IDU side connection pipe

② ODU to ODU connection pipe (1st branch)

③ ODU to ODU connection pipe (2nd branch)

2, 3 Outdoor Units

(Master)

(Slave1)

(Slave2)

For more information, refer accessory installation manual.

Y branch

To outdoor unit

To branch piping or indoor unit

Viewed from point A

in direction of arrow

Within +/- 10

Facing

upwards

Facing

downwards

Connection of Outdoor units

When installing ODU series, refer below picture.

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the

branching pipes, and the refrigerant pipe coming out of the outdoor

unit is divided at the end to connect to each indoor unit. Flare

connection for the indoor unit, and welding connection for the outdoor

pipe and the branching parts. (Including HR Unit)

- Use hexagonal wrench to open/close the valve.

REFRIGERANT PIPING INSTALLATION

Unit : mm(inch)

Outdoor Units Model Pipe

2 Unit

Ⓐ

ARCNB21

Low Pressure Gas Pipe

I.D.22.2

(7/8)

O.D.28.58

(1-1/8)

416(16-3/8)

I.D.28.58(1-1/8)

I.D.31.8(1-1/4)

I.D.41.3

(1-5/8)

130(5-1/8)

I.D.22.2

(7/8)

O.D.28.58

(1-1/8)

I.D.34.9

(1-3/8)

I.D.28.58(1-1/8)

I.D.28.58

(1-1/8)

111

(4-3/8)

I.D.38.1

(1-1/2)

O.D.34.9

(1-3/8)

I.D.34.9(1-3/8)

I.D.22.2(7/8)

408(16-1/16)

I.D.34.9

(1-3/8)

Liquid Pipe

I.D.19.05(3/4)

I.D.15.88(5/8)

I.D.19.05(3/4)

I.D.12.7

(1/2)

I.D.9.52

(3/8)

(3-9/32)

I.D.22.2

(7/8)

70(2-3/4)

O.D.19.05

(3/4)

I.D.12.7(1/2) I.D.15.88(5/8)

O.D.12.7(1/2)

I.D.9.52(3/8)

O.D.15.88(5/8)

I.D.19.05(3/4)

I.D.15.88(5/8)

O.D.15.88(5/8)

331(13-1/32)

314(12-3/8)

High Pressure Gas Pipe

I.D.15.88(5/8)O.D.22.2

(7/8)

I.D.19.05

(3/4)

I.D.28.58(1-1/8)

I.D.31.8

(1-1/4)

O.D.28.58

(1-1/8)

1.D.22.2(7/8)

I.D.19.05(3/4)

I.D.28.58(1-1/8)

111

(4-3/8)

I.D.34.9

(1-3/8)

I.D.28.58

(1-1/8)

I.D.22.2(7/8)

416(16-3/8)

408(16-1/16)

3 Unit

Ⓑ

ARCNB31

Low Pressure Gas Pipe

O.D.34.9

(1-3/8)

I.D.28.58

(1-1/8)

I.D.41.3

(1-5/8)

O.D.34.9

(1-3/8)

I.D.41.3(1-5/8)

I.D.53.98

(2-1/8)

I.D.44.5

(1-3/4)

O.D.41.3

(1-5/8)

I.D.22.2

(7/8)

I.D.34.9(1-3/8)O.D.28.58

(1-1/8)

I.D.28.58(1-1/8)

I.D.34.9

(1-3/8)

341(13-7/16)

125

(4-29/32)

111

(4-3/8)

298(11-23/32)

Liquid Pipe

O.D.19.05(3/4)

I.D.22.2(7/8)

O.D.19.05

(3/4)

I.D.22.2

(7/8)

I.D.28.58

(1-1/8)

I.D.15.88

(5/8)

I.D.19.05

(3/4)

(3-9/32)

I.D.12.7(1/2)

O.D.15.88(5/8) I.D.19.05(3/4)

I.D.19.05(3/4)

I.D.12.7(1/2)

O.D.19.05

(3/4)

I.D.22.2(7/8)

I.D.15.88(5/8)

334(13.5/32)

281(11-1/16)

High Pressure Gas Pipe

I.D.22.2

(7/8)

I.D.28.58(1-1/8)

I.D.31.8(1-1/4)

I.D.41.3

(1-5/8)

I.D.53.98

(2-1/8)

I.D.44.5

(1-3/4)

O.D.41.3

(1-5/8)

130(5-1/8)

I.D.38.1

(1-1/2)

O.D.34.9

(1-3/8)

I.D.34.9(1-3/8)

I.D.28.58(1-1/8)

111

(4-3/8)

I.D.34.9

(1-3/8)

O.D.28.58

(1-1/8)

I.D.22.2

(7/8)

I.D.28.58

(1-1/8)

I.D.22.2(7/8)

O.D.28.58

(1-1/8)

416(16-3/8)

408(16-1/16)

I.D.34.9

(1-3/8)

Please block the pipe knock outs of the front and side panels after

installing the pipes.

(Animals or foreign objects may be brought in to damage wires.)

CAUTION

Y-branches between the outside units must be installed horizontally.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 11

ENGLISH

Gas pipe

Liquid pipe

HR Unit

High

Pressure

Gas Pipe

Liquid pipe

Low Pressure

Gas Pipe

Pipe

connection

from left

side

Pipe

connection

from right

side

Parallel

pipe

connection

HR Unit 2

HR Unit

1 2 3 4

(96k) (28k)

1 2 3 4

(76k)(21k)

Gas pipe Ø 15.88 (5/8)

Liquid pipe Ø 9.52 (3/8)

Brazing Type

Remove caps on

The brazing part.

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

WARNING

Before brazing work, remove gas in the HR Unit by cutting the

three pipes in the small circles on the figure.

If not, it may cause injuries.

Remove the caps before connecting pipes.

Joint Method of HR Unit

(Big Duct : ARNU763B8-, ARNU963B8-)

Joint Method is required when the big duct chassis is installed. In Joint

Method, two neighboring outlets of one HR unit are linked by Y branch

pipe and connected to one indoor unit.

2 Series

Type of HR Unit

Select an HR unit according to the number of the indoor units to be

installed. HR units are classified into 3 types by the number of

connectable indoor units.

Ex) Installation of 6 indoor units

Consists of HR unit for 4 branches and HR unit for 2 branches.

2 Series

3 Series

Installation of Outdoor Unit, HR Unit, Indoor Unit

Refrigerant Pipe

3 pipes are connected to the HR unit from the outdoor unit, classified

into liquid pipe, low pressure gas pipe and high pressure gas pipe

depending on status of refrigerant passing through the pipe.

You must connect 3 pipes from outdoor unit to HR unit.

For connection between indoor unit and HR unit, you must connect

both liquid pipe and gas pipe from the HR unit to the indoor unit. In this

case, connect them to the indoor unit starting from No.1 connection

port of the HR unit (the port number is displayed on ports of the HR

unit). Use auxiliary flare as annexed parts in connection to the indoor

unit.

Installation procedure for HR unit

1 Using an insert-hole-in- anchor, hang the hanging bolt.

2 Install a hexagon nut and a flat washer (locally-procured)to the

hanging bolt as shown in the figure in the bottom, and fit the main

unit to hang on the hanger metal.

After checking with a level that the unit is level, tighten the hexagon nut.

* The tilt of the unit should be within ± 5° in front/back and

left/right.

4 This unit should be installed suspended from ceiling and side A

should always be facing up.

5 Insulate not used pipes completely as shown in the figure.

Six-sided Nut

(M10 or M8)

Hanger metal

Flat washer

(M10)

Hanging bolt

(M10 or M8)

Insulation

PRHR022A

(2 branches)

PRHR032A

(3 branches)

PRHR042A

(4 branches)

PRHR023A

(2 branches)

PRHR033A

(3 branches)

PRHR063A

(6 branches)

PRHR083A

(8 branches)

PRHR043A

(4 branches)

Whenever connecting the indoor units with the HR unit, install the

indoor units in numerical order from No.1.

Ex) In case of installing 3 indoor units : No. 1, 2, 3 (O), No. 1, 2, 4 (X),

No.1, 3, 4 (X), No.2, 3, 4 (X).

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 12

ENGLISH

HR unit

PRHR022A

PRHR023A

PRHR032A

PRHR033A

PRHR042A

PRHR043A

PRHR063A

PRHR083A

Low pressure

gas pipe

Ø 22.2 (7/8) Ø 28.58 (1-1/8) Ø 28.58 (1-1/8)

High pressure

gas pipe

Ø 19.05 (3/4) Ø 22.2 (7/8) Ø 22.2 (7/8)

Liquid pipe Ø 9.52 (3/8) Ø 12.7 (1/2) Ø 15.88 (5/8)

Installation of Zoning Control

Some indoor unit can be connected to one port of HR unit.

HR unit HR unit

sealing

Changeover under control Auto changeover Changeover under control

Zoning control group 1 Zoning control group 2

(Max. 8 Indoor Units)

2 HR Unit

HR Unit

4 3 2 1

(38k) (92k)

(48k)

(72k)

4 3 2 1

3 Series

NOTE

• A connection to un-neighboring pipes is forbidden.

Do not link more than 2 outlets.

• The B8 unit, which has the largest capacity, must be connected

to the 1st and 2nd outlets of the 1st HR unit. Other B8 units can

be connected to any two neighboring outlets within one HR unit.

HR Unit 2

HR Unit

HR Unit 1

HR Unit

4 3 2 1

HR Unit 1

HR Unit

4 3 2 1

(92k) (38k)

4 3 2 1

(72k)(34k)

WARNING

• A branch pipe of HR unit allows up to 14.1 kW (48 kBtu/h) based

on cooling capacity of the indoor unit.

(up to 14.1 kW (48 kBtu/h) for max installation)

• The maximum total capacity of indoor units connected to a

PRHR042A HR unit is 56.4 kW (192 kBtu/h).

• The maximum number of indoor units connected to a PRHR042A

unit are 32 indoor units. (The Maximum indoor units per a branch

pipe of HR unit are 8 indoor units)

• There is not operate “Auto-changeover” & “Mode override”

function in the zoning group.

• When there are operating indoor units on cooling(heating) mode,

another indoor units aren’t changed on heating(cooling) mode in

the zoning group.

[Reducers for indoor unit and HR unit]

Unit : mm (inch)

Models

High pressure

–

Gas pipe

Low pressure

Liquid pipe

Indoor unit

reducer

HR unit

reducer

PRHR022A

PRHR023A

OD22.2(7/8)

Ø 19.05(3/4)

Ø 15.88(5/8)

OD15.88(5/8)

Ø 12.7(1/2)

Ø 6.35(1/4)OD9.52(3/8)

OD19.05(3/4)

Ø 15.88(5/8)

OD12.7(1/2) Ø 9.52(3/8)

Ø 12.7(1/2)

OD22.2(7/8) Ø 19.05(3/4)

Ø 15.88(5/8)

OD15.88(5/8) Ø 12.7(1/2)

PRHR032A

PRHR042A

PRHR033A

PRHR043A

PRHR063A

PRHR083A

OD19.05(3/4)

Ø 15.88(5/8)

OD28.58(1-1/8)

Ø 22.2(7/8)

Ø 19.05(3/4)

OD15.88(5/8) Ø 12.7(1/2) Ø 9.52(3/8)

OD15.88(5/8)

Ø 12.7(1/2)

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 13

ENGLISH

Caution

1 Use the following materials for refrigerant piping.

- Material: Seamless phosphorous deoxidized copper pipe

- Wall thickness : Comply with the relevant local and national

regulations for the designed pressure 3.8 MPa

(551 psi). We recommend the following table as

the minimum wall thickness.

Outer diameter

[mm(inch)]

6.35

(1/4)

9.52

(3/8)

12.7

(1/2)

15.88

(5/8)

19.05

(3/4)

22.2

(7/8)

25.4

(1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

44.45

(1-3/4)

53.98

(2-1/8)

Minimum

thickness

[mm(inch)]

0.8

(0.03)

0.8

(0.03)

0.8

(0.03)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

1.1

(0.04)

1.21

(0.05)

1.35

(0.05)

1.43

(0.06)

1.55

(0.06)

2.1

(0.08)

6 If the diameters of the branch piping of the designated refrigerant

piping differs, use a pipe cutter to cut the connecting section and

then use an adapter for connecting different diameters to connect

the piping.

7 Always observe the restrictions on the refrigerant piping (such as

rated length, difference in height, and piping diameter).

Failure to do so can result in equipment failure or a decline in

heating/cooling performance.

8 A second branch cannot be made after a header.

(These are shown by .)

9 The Multi V will stop due to an abnormality like excessive or

insufficient refrigerant. At such a time, always properly charge the

unit. When servicing, always check the notes concerning both the

piping length and the amount of additional refrigerant.

10 Never perform a pump down. This will not only damage the

compressor but also deteriorate the performance.

11 Never use refrigerant to perform an air purge. Always evacuate air

by using a vacuum pump.

To Outdoor Unit

Sealed Piping

12 Always insulate the piping properly. Insufficient insulation will

result in a decline in heating/cooling performance, drip of

condensate and other such problems.

13 When connecting the refrigerant piping, make sure the service

valves of the Outdoor Unit is completely closed (the factory

setting) and do not operate it until the refrigerant piping for the

Outdoor and Indoor Units has been connected, a refrigerant

leakage test has been performed and the evacuation process has

been completed.

14 Always use a non-oxidizing brazing material for brazing the parts

and do not use flux. If not, oxidized film can cause clogging or

damage to the compressor unit and flux can harm the copper

piping or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be

sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original

refrigerant, the refrigerant cycle may malfunction and the unit

may be damaged.

• After selecting diameter of the refrigerant pipe to suit total

capacity of the indoor unit connected after branching, use an

appropriate branch pipe set according to the pipe diameter of the

indoor unit and the installation pipe drawing.

2 Commercially available piping often contains dust and other

materials. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from

entering the piping during installation.

4 Reduce the number of bending portions as much as possible, and

make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold

separately.

Y branch

Header

4 branches 7 branches 10 branches

ARBLB01621, ARBLB03321,

ARBLB07121, ARBLB14521,

ARBLB23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Service Port

Not used(keep closed)

Liquid pipe

Gas pipe

WARNING

• Always careful not to leak the refrigerant during welding.

• The refrigerant generates poisonous gas harmful to human body

if combusted.

• Do not perform welding in a closed space.

• Be sure to close the cap of the service port to prevent gas

leakage after the work.

For Heat Pump System Installation

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the

branching pipes, and the refrigerant pipe coming out of the outdoor

unit is divided at the end to connect to each indoor unit. Flare

connection for the indoor unit, and welding connection for the outdoor

pipe and the branching parts.

- Use hexagonal wrench to open/close the valve.

h In case of the heat pump system installation, be sure to maintain to

close no use pipe like below picture.

1,MFL68980308,영영 2018. 11. 13. 영영 3:22 Page 14

ENGLISH

A≥B≥C

① IDU side connection pipe

② ODU to ODU connection pipe (1st branch)

③ ODU to ODU connection pipe (2nd branch)

(Master)

(Slave1)

(Slave2)

Caution

1 Use the following materials for refrigerant piping.

- Material: Seamless phosphorous deoxidized copper pipe

- Wall thickness : Comply with the relevant local and national

regulations for the designed pressure 3.8 MPa

(551 psi). We recommend the following table as

the minimum wall thickness.

Outer diameter

[mm(inch)]

6.35

(1/4)

9.52

(3/8)

12.7

(1/2)

15.88

(5/8)

19.05

(3/4)

22.2

(7/8)

25.4

(1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

44.45

(1-3/4)

53.98

(2-1/8)

Minimum

thickness

[mm(inch)]

0.8

(0.03)

0.8

(0.03)

0.8

(0.03)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

1.1

(0.04)

1.21

(0.05)

1.35

(0.05)

1.43

(0.06)

1.55

(0.06)

2.1

(0.08)

2 Commercially available piping often contains dust and other

materials. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from

entering the piping during installation.

4 Reduce the number of bending portions as much as possible, and

make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold

separately.

2, 3 Outdoor Units

For more information, refer accessory installation manual.

Y branch

To outdoor unit

To branch piping or indoor unit

Facing

upwards

Facing

downwards

Viewed from point A

in direction of arrow

Within +/- 10

Outdoor Units Model Pipe

2 Unit

Ⓐ

ARCNN21

Liquid Pipe

O.D.15.88(5/8)

I.D.15.88(5/8)

I.D.19.05(3/4)

I.D.22.2(7/8)

O.D.15.88(5/8) I.D.19.05(3/4)

I.D.12.7(1/2) I.D.15.88(5/8)

O.D.12.7(1/2) I.D.9.52(3/8)

I.D.12.7

(1/2)

I.D.9.52

(3/8)

(3-9/32)

O.D.19.05(3/4)

70(2-3/4)

I.D.15.88(5/8)

331(13-1/32)

314(12-3/8)

I.D.19.05(3/4)

Gas Pipe

I.D.22.2

(7/8)

I.D.28.58(1-1/8)

I.D.31.8(1-1/4)

I.D.28.58

(1-1/8)

I.D.34.9(1-3/8)

I.D.41.3

(1-5/8)

130(5-1/8)

I.D.38.1

(1-1/2)

I.D.22.2

(7/8)

O.D.28.58

(1-1/8)

I.D.34.9(1-3/8)

111

(4-3/8)

O.D.34.9(1-3/8)

I.D.28.58(1-1/8)

I.D.22.2(7/8)

O.D.28.58

(1-1/8)

416(16-3/8)

408(16-1/16)

I.D.34.9

(1-3/8)

3 Unit

Ⓑ

ARCNN31

Liquid Pipe

O.D.19.05(3/4)

I.D.15.88(5/8)

I.D.22.2

(7/8)

O.D.19.05(3/4)

I.D.22.2(7/8)

I.D.15.88(5/8) I.D.12.7(1/2)

I.D.28.58(1-1/8)

O.D.15.88(5/8) I.D.19.05(3/4)

I.D.19.05

(3/4)

I.D.19.05

(3/4)

334(13-5/32)

281(11-1/16)

I.D.12.7(1/2)

O.D.19.05(3/4) I.D.22.2(7/8)

(3-9/32)

Gas Pipe

O.D.34.9(1-3/8) I.D.28.58(1-1/8)

I.D.41.3(1-5/8) O.D.34.9(1-3/8)

I.D.41.3(1-5/8)

I.D.53.98(2-1/8) O.D.41.3(1-5/8)

I.D.22.2(7/8)

O.D.28.58(1-1/8)

I.D.34.9(1-3/8)

I.D.28.58(1-1/8)

I.D.34.9

(1-3/8)

111

(4-3/8)

I.D.44.5(1-3/4)

341(13-7/16)

125(4-29/32)

298(11-23/32)

Y branch

Header

4 branches 7 branches 10 branches

ARBLN01621, ARBLN03321,

ARBLN07121, ARBLN14521,

ARBLN23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

6 If the diameters of the branch piping of the designated refrigerant

piping differs, use a pipe cutter to cut the connecting section and

then use an adapter for connecting different diameters to connect

the piping.

7 Always observe the restrictions on the refrigerant piping (such as

rated length, difference in height, and piping diameter).

Failure to do so can result in equipment failure or a decline in

heating/cooling performance.

8 A second branch cannot be made after a header. (These are shown

by .)

Connection of Outdoor units

When installing ODU series, refer below picture.

Please block the pipe knock outs of the front and side panels after

installing the pipes.

(Animals or foreign objects may be brought in to damage wires.)

CAUTION

Y-branches between the outside units must be installed

horizontally.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 15

ENGLISH

To Outdoor Unit

Sealed Piping

9 The Multi V will stop due to an abnormality like excessive or

insufficient refrigerant. At such a time, always properly charge the

unit. When servicing, always check the notes concerning both the

piping length and the amount of additional refrigerant.

10 Never perform a pump down. This will not only damage the

compressor but also deteriorate the performance.

11 Never use refrigerant to perform an air purge. Always evacuate air

by using a vacuum pump.

12 Always insulate the piping properly. Insufficient insulation will

result in a decline in heating/cooling performance, drip of

condensate and other such problems.

13 When connecting the refrigerant piping, make sure the service

valves of the Outdoor Unit is completely closed (the factory

setting) and do not operate it until the refrigerant piping for the

Outdoor and Indoor Units has been connected, a refrigerant

leakage test has been performed and the evacuation process has

been completed.

14 Always use a non-oxidizing brazing material for brazing the parts

and do not use flux. If not, oxidized film can cause clogging or

damage to the compressor unit and flux can harm the copper

piping or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be

sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original

refrigerant, the refrigerant cycle may malfunction and the unit

may be damaged.

• After selecting diameter of the refrigerant pipe to suit total

capacity of the indoor unit connected after branching, use an

appropriate branch pipe set according to the pipe diameter of the

indoor unit and the installation pipe drawing.

- Pipe connections can be done on the front side or on the side

according to the installation environments.

- Be sure to let 0.2 kgf/cm

(2.8 psi) Nitrogen flow in the pipe when

welding.

- If Nitrogen was not flown during welding, many oxidized membranes

may form inside the pipe and disturb the normal operations of valves

and condensers.

Left Side

Pipe Draw

Out

Front Pipe Draw Out

Right

Side Pipe

Draw Out

Refrigerant Pipe

Regulator

Nitrogen

Taping

Valve

Nitrogen

Direction

Nitrogen

Direction

Knock Out for

Liquid pipe

Knock Out for low

pressure gas pipe

Knock Out for high

pressure gas pipe

Knock Out for

communication cable

Removal area for pipes

bottom side connections.

Knock Out for

power supply cable

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or

Bottom pipe drawing outs.

PIPE CONNECTIONS BETWEEN

INDOOR AND OUTDOOR UNIT

For Heat Recovery System Installation

• Do not give damage to the pipe/base during the Knock Out

work.

• Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when

connecting wires using Knock Outs.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 16

ENGLISH

Method of drawing out pipes on the bottom side

- Drawing out common pipe through side panel

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit

service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether the liquid/gas pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

h In case of heat pump installation, please weld with the proper Low

pressure Gas pipe included with product.

Refrigerant piping system

3 Outdoor Units

Example : 12 Indoor Units connected

Ⓐ : Outdoor Unit

Ⓑ : Y branch

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe between Outdoor units : ARCNB31

Ⓕ : Connection branch pipe between Outdoor units : ARCNB21

Ⓖ : Header

Ⓗ : HR Unit

- Case 1 ("a")

: Maximum height is 30 m (98.4 ft) if you install with Y branch.

- Case 2 ("b")

: Maximum height is 5 m(16 ft) in serial connection of HR units.

sealing

"a"

"b"

Master

Slave 1

Slave 2

ODU Capacity

Master ≥ Slave1 ≥ Slave 2

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front

side pipe drawing out.

Refrigerant pipe diameter from branch to branch (B,C,D)

WARNING

* : Serial connection of HR units : Capacity sum of indoor units ≤

192.4 kBtu/hr

• Refer to the HR unit PCB part for the valve group control setting.

• It is recommended that difference in pipe lengths between an HR

unit and indoor units, for example

difference in length of a, b, c, and d, be minimized. The larger

difference in pipe lengths, the more different performance

between indoor units.

• Piping length from outdoor branch to outdoor unit ≤ 10 m (33 ft),

equivalent length : max 13 m (43 ft)

* If the large capacity indoor units (Over 5 HP; using over Ø 15.88

(5/8) / Ø 9.52 (3/8) are installed, it should be used the Valve Group

setting

High Pressure Gas pipe

Liquid pipe

Low Pressure Gas pipe

131(5-5/32)

69(2-23/32)

126(4-31/32)

High Pressure

Gas pipe

Liquid pipe

Low Pressure Gas pipe

Service Port

Liquid pipe

Low Pressure

Gas pipe

High Pressure

Gas pipe

Leakage

Prevention Cap

Liquid pipe Low Pressure Gas pipe

High Pressure Gas pipe

Remove Knock Out for the bottom side of Liquid / Gas pipe

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 17

ENGLISH

- * : Assume equivalent pipe length of Y branch to be 0.5 m (1.64 ft),

that of header to be 1m (3.3 ft), calculation purpose

- It is recommended that indoor unit is installed at lower position than

the header.

- ** : To apply conditional application.

Refrigerant pipe diameter from branch to branch (B,C)

Downward indoor

unit total capacity

[kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe [mm(inch)]

Low pressure High pressure

≤ 5.6(19 100)

Ø 6.35(1/4) Ø 12.7(1/2) Ø 9.52(3/8)

< 16.0(54 600) Ø 9.52(3/8) Ø 15.88(5/8) Ø 12.7(1/2)

< 22.4(76 400) Ø 9.52(3/8) Ø 19.05(3/4) Ø 15.88(5/8)

< 33.6(114 700) Ø 9.52(3/8) Ø 22.2(7/8) Ø 19.05(3/4)

< 50.4(229 000) Ø 12.7(1/2) Ø 28.58(1 1/8) Ø 22.2(7/8)

< 61.6(210 600) Ø 15.88(5/8) Ø 28.58(1 1/8) Ø 22.2(7/8)

< 72.8(210 600) Ø 15.88(5/8) Ø 34.9(1 3/8) Ø 28.58(1 1/8)

< 100.8(344 000) Ø 19.05(3/4) Ø 34.9(1 3/8) Ø 28.58(1 1/8)

< 173.6(592 500) Ø 19.05(3/4) Ø 41.3(1 5/8) Ø 34.9(1 3/8)

Total pipe length = A + B + C1 + C2 + C3 + a + b + c + d

+ e + f + g + i + j + k + l + m + n ≤ 1 000 m (3 280 ft)

Longest pipe length * Equivalent pipe length

A+B+C3+D+k ≤ 150 m (200 m**) [(492 ft(656 ft**)] A+B+C3+D+k ≤ 175 m (225 m**) [(574 ft(738 ft**)]

Longest pipe length after 1st branch

B+C3+D+k ≤ 40 m(90 m**) [131 ft (295 ft)]

Difference in height(Outdoor Unit ↔ Indoor Unit)

H ≤ 110 m (361 ft)

Difference in height (Indoor Unit ↔ Indoor Unit)

h ≤ 40 m (131 ft)

Difference in height (Outdoor Unit ↔ Outdoor Unit)

h1 ≤ 5 m (16.4 ft)

"a", "b"

Difference in height(HR unit ↔ HR unit)

a ≤ 15 m (49 ft), b ≤ 5 m (16 ft)

WARNING

When the equivalent length between a outdoor and the farthest

indoor unit is 90 m (295 ft) or more, main pipe(A) must be increased

one grade.

Refrigerant pipe diameter from outdoor unit to ﬁrst

branch. (A)

Y branch, Header and HR unit connection pattern

* If available on site, select pipe size according to upper table.

Otherwise it doesn’t need to be increased.

Pattern 1

HR1

48k 48k

1 2

HR2

48k 48k

3 4

• Impossible installation : Head branch pipe HR unit

Pattern 2

HR1

234567

7k 7k 7k 7k 7k 24k 24k

• Impossible installation : HR unit Head branch

pipe Y and Head branch pipe.

ODU

Capacity

(HP(ton))

Standard Pipe Diameter

Pipe diameter when pipe length is ≥

90 m (295 ft) or when height differential

(ODU↔IDU) is > 50 m (164 ft)

Liquid Pipe

mm (inch)

Low

Pressure

Vapor Pipe

[mm(inch)]

High

Pressure

Vapor Pipe

[mm(inch)]

Liquid Pipe

mm (inch)

Low

Pressure

Vapor Pipe

[mm(inch)]

High

Pressure

Vapor Pipe

[mm(inch)]

8(6)

Ø 9.52

(3/8)

Ø 19.05

(3/4)

Ø 15.88

(5/8)

Ø 12.7

(1/2)

Not

increased

Not

increased

10(8)

Ø 9.52

(3/8)

Ø 22.2

(7/8)

Ø 19.05

(3/4)

Ø 12.7

(1/2)

Not

increased

Not

increased

12(10)

Ø 12.7

(1/2)

Ø 28.58

(1-1/8)

Ø 19.05

(3/4)

Ø 15.88

(5/8)

Not

increased

Not

increased

14(12)

Ø 12.7

(1/2)

Ø 28.58

(1-1/8)

Ø 22.2

(7/8)

Ø 15.88

(5/8)

Not

increased

Not

increased

18(14)

Ø 15.88

(5/8)

Ø 28.58

(1-1/8)

Ø 22.2

(7/8)

Ø 19.05

(3/4)

Not

increased

Not

increased

20~22

(16~18)

Ø 15.88

(5/8)

Ø 28.58

(1-1/8)

Ø 28.58

(1-1/8)

Ø 19.05

(3/4)

Not

increased

Not

increased

24(20)

Ø 15.88

(5/8)

Ø 34.9

(1-3/8)

Ø 28.58

(1-1/8)

Ø 19.05

(3/4)

Not

increased

Not

increased

26~34

(22~28)

Ø 19.05

(3/4)

Ø 34.9

(1-3/8)

Ø 28.58

(1-1/8)

Ø 22.2

(7/8)

Not

increased

Not

increased

36~50

(30~42)

Ø 19.05

(3/4)

Ø 41.3

(1-5/8)

Ø 28.58

(1-1/8)

Ø 22.2

(7/8)

Not

increased

Not

increased

(**) Conditional Application (In case of D12 is the farthest in door)

Below condition must be satisfied for 40~90 m (131~295 ft) piping length

after first branch.

Diameter of pipes between first branch and the last branch should be

increased by one step, except if the pipe diameter B, C3 is same as

diameter A (main pipe diameter)

Ø 6.35 (1/4), Ø 9.52 (3/8), Ø 12.7 (1/2), Ø 15.88 (5/8), Ø 19.05 (3/4),

Ø 22.2 (7/8), Ø 25.4* (1), Ø 28.58 (1-1/8), Ø 31.8* (1-1/4), Ø 34.9 (1-3/8),

Ø 38.1* (1-1/2)

* : If available on site, it use this size. Otherwise it can’t be increased.

While calculating total refrigerant piping length, pipe B, C3 length should

be calculated twice.

A + B x 2 + C3 x 2 + C1 + C2 + a + b + c + d + e + f + g + i + j + k + l

+ m + n ≤ 1 000 m (3 281 ft)

Length of pipe from each indoor unit to the closest HR unit

(a, b, c, d, e, f, g, i, j, k, l, m, n) ≤ 40 m (131 ft)

[Length of pipe from outdoor unit to the farthest indoor unit D12

(B+C3+K)

- [Length of pipe from outdoor unit to the closest indoor unit D1 (C1+a)]

≤ 40 m (131 ft)

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 18

ENGLISH

Pattern 3

HR1

48k 48k 48k 48k

1 2 3 4

• The maximum total capacity of indoor

units is 56.4 kW(192 kBtu/h).

Pattern 4

12k 12k 12k 12k

1 2 3 4

• The maximum total capacity of a branch

pipe of HR unit is 14.1 kW(48 kBtu/h).

HR1

Pattern 5

HR1

48k 48k

1 2

HR2

48k 48k

3 4

HR1

24k 24k 24k

12k 12k

Pattern 6

12 345

Pattern 8

• * : Maximum indoor units per a branch are 8 indoor units

HR1

48k 48k

1 2

HR2

12k 12k 12k 12k

3 4 5 6

24k

Pattern 7

HR1

48k 48k

1 2

• * : Serial connection of HR units : Capacity sum of indoor units ≤ 56.4 kW (192 kBtu/h)

HR2

48k 48k

3 4

HR3

48k 48k

5 6

• Pipe installation from outdoor units to HR units

: 3 pipes(Low pressure Gas pipe, High pressure Gas pipe, Liquid pipe)

• Pipe installation from HR units to indoor units

: 2 pipes(Gas pipe, Liquid pipe)

HR1

Outdoor

Unit

Indoor Unit Y Branch pipe

Low pressure Gas pipe

High pressure Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Head Branch pipe

Indoor

Unit

Keep the 40 m (131 ft) distance from the first branch to the farthest

indoor.

5 m(16 ft)

15 m(49 ft)

1) under 40 m (131 ft)

Keep the sum of indoor capacity under 56.4 kW(192 kBtu/h).

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

1) under 40 m (131 ft)

Y branch

Keep the sum of indoor capacity under 56.4 kW(192 kBtu/h).

For Heat Pump System Installation

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or

Bottom pipe drawing outs.

Knock Out for

Liquid pipe

Knock Out for low

pressure gas pipe

Knock Out for high

pressure gas pipe

Knock Out for

communication cable

Removal area for pipes

bottom side connections.

Knock Out for

power supply cable

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 19

ENGLISH

Piping length from outdoor branch to outdoor unit ≤ 10 m(33 ft),

equivalent length : max 13 m(43 ft) (for 14 Ton or more)

Additional Application

To satisfy below condition to make 40 m(131 ft) ~ 90 m(295 ft) of

pipe length after first branch.

• Diameter of pipes between first branch and the last branch

should be increased by one step, except pipe diameter B,C,D is

same as Diameter A

Ø 1/4(6.35 mm) ’ Ø 3/8(9.52 mm) ’ Ø 1/2(12.7 mm) ’

Ø 5/8(15.88 mm) ’ Ø 3/4(19.05 mm) ’ Ø 7/8(22.2 mm) ’

Ø 1(25.4)*, Ø 1-1/8(28.58 mm) ’ Ø 1-1/4(31.8 mm)*,

Ø 1-3/8(34.9 mm) ’ Ø 1-1/2(38.1 mm)* ’ Ø 1-5/8(41.3 mm)

* : It is not necessary to size up.

h If the step up size is not available, you can not select the next

higher size available.

•

While calculating whole refrigerant pipe length, pipe B,C,D length

should be calculated twice.

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1 000 m(3 281 ft)

• Length of pipe from each indoor unit to the closest branch

(a,b,c,d,e) ≤ 40 m(131 ft)

• [Length of pipe from outdoor unit to the farthest indoor unit 5

(A+B+C+D+e)]

- [Length of pipe from outdoor unit to the closest indoor unit 1

(A+a)] ≤ 40 m(131 ft)

Method of drawing out pipes on the bottom side

- Drawing out common pipe through side panel

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit

service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

- Verify whether all the pipes are locked.

- Extract remaining refrigerant or air inside using the service port.

- Remove the leakage prevention cap

h In case of heat pump system installation, please weld with the

proper accessory pipe included with product.

Combination of Y

branch/header Method

Header Method

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓓ : Indoor Unit

Ⓔ : Header

Ⓕ : Sealed piping

Ⓐ : Outdoor Unit

Ⓓ : Sealed piping

Ⓔ : Header

l 40 m [131 ft] (90 m [295 ft])

h 40 m(131 ft)

H 110 m [361 ft]

L 150 m [492 ft] (200 m [656 ft])

l 40 m [131 ft]

h 40 m [131 ft]

H 110 m [361 ft]

L 200 m [656 ft]

h * : See Table 4

Y branch method

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

l 40 m [131 ft] (90 m [295 ft])

h 40 m [131 ft]

H 110 m [361 ft]

L 150 m [492 ft] (200 m [656 ft])

Indoor

Unit

Refrigerant piping system

1 Outdoor Units

h * : See Table 4

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front

side pipe drawing out.

Service Port

Liquid pipe

Gas pipe

Leakage

Prevention Cap

Not used

(keep closed)

Liquid pipe

Gas pipe

High Pressure

Gas pipe

Liquid pipe

131(5-5/32)

126(4-31/32)

Liquid pipe

Not used(keep closed)

High Pressure Gas pipe

Remove Knock Out for the pipes

• Do not give damage to the pipe/base during the Knock Out

work.

• Proceed to pipe work after removing burr after Knock Out work.

• Perform sleeve work to prevent damage to the wire when

connecting wires using Knock Outs.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 20

ENGLISH

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓔ : Connection branch

pipe between Outdoor

units: ARCNN31

Ⓕ : Connection branch

pipe between Outdoor

units: ARCNN21

Y branch method

10 m

(323 ft)

or less

L150 m(492 ft) (200 m(656 ft) : Conditional application)

ODU Capacity

Master ≥ Slave1 ≥ Slave 2

40 m(131 ft) (90 m(295 ft) : Conditional application)

H 361 ft(110 m)

40 m(131 ft)

Slave2

Slave1

Master

h * : See Table 4

Combination of Y branch/

header Method

Ⓐ : Outdoor Unit

Ⓑ : 1st branch(Y branch)

Ⓓ : Indoor Unit

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

Ⓖ : Header

Ⓗ : Sealed piping

H 110 m(361 ft)

Master

Slave2

Slave1

ODU Capacity

Master ≥ Slave1 ≥ Slave2

40 m(131 ft)

10 m

(33 ft)

or less

L 150 m(492 ft)(200 m(656 ft) : Conditional application)

40 m(131 ft)(90 m(295 ft) : Conditional application)

h * : See Table 4

Pipe Connection Method between outdoor

unit/indoor unit

Header Method

Ⓐ : Outdoor Unit

Ⓑ : Header branch

Ⓓ : Sealed piping

Ⓔ : Connection branch pipe

between Outdoor units:

ARCNN31

Ⓕ : Connection branch pipe

between Outdoor units:

ARCNN21

10 m

(33 ft)

or less

H 110 m(361 ft)

40 m(131 ft)

L 200 m(656 ft)

40 m(131 ft)

Master

Slave2

Slave1

ODU Capacity

Master ≥ Slave1 ≥ Slave2

h See Table 2

A : Refrigerant pipe diameter from outdoor unit to first branch

E : Refrigerant pipe diameter for outdoor unit capacity

(Slave 1+ Slave 2+ Slave 3)

F : Refrigerant pipe diameter for outdoor unit capacity

(Slave 2+ Slave 3)

G : Refrigerant pipe diameter for outdoor unit capacity(Slave 3)

E F

Slave2

Slave1

Master

l 40m (131ft)

h 40 m (131 ft)

Indoor

Unit

1st branch

Refrigerant pipe diameter from outdoor unit to ﬁrst branch

Level Difference

(Outdoor unit ↔ Outdoor unit)

5 m [16.4 ft]

Max length from first branch to

each outdoor unit (L1, L2, L3)

Less than 10 m [32.8 ft]

(equivalent length of piping 13 m

[42.7 ft])

h * : See Table 4

WARNING

Increased Pipe Diameter(table 2)

- When pipe length is 90 m [295 ft] or more from ODU to 1st branch

- When level difference is 50 m [164 ft] or more

Y branch

Method

Combination of Y

branch/header

Method

Header

Method

Max pipe

length

Outdoor Unit

↔

Indoor Unit

Longest

pipe length(L)

A+B+C+D+e ≤

150 m [492 ft]

(200 m [656 ft] :

Conditional

application)*

A+B+b ≤ 150 m

[492 ft]

A+C+e ≤ 150 m

[492 ft]

(200 m [656 ft] :

Conditional

application)*

A+f ≤ 200 m

[656 ft]

Equivalent

pipe length

175 m [574 ft]

(225 m [738 ft] :

Conditional

application)*

175 m [574 ft]

(225 m [738 ft] :

Conditional

application)*

225 m

[738 ft]

Total pipe

length

1 000 m

[3 281 ft]

1 000 m [3 281 ft]

1 000 m

[3 281 ft]

Max

difference

in height

Outdoor Unit

↔ Indoor Unit

Difference

in height(H)

110 m [361 ft] 110 m [361 ft]

110 m

[361 ft]

Indoor Unit

↔ Indoor Unit

Difference

in height(h)

40 m [131 ft] 40 m [131 ft]

40 m

[131 ft]

Longest

pipe length

after

1st branch

Pipe length(l)

40 m [131 ft]

(90 m [295 ft] :

Conditional

application)*

40 m [131 ft]

(90 m [295 ft] :

Conditional

application)*

40 m

[131 ft]

(Table 1) Limit Pipe length

Series Outdoor Units (2 Units ~ 3 Units)

Piping length from outdoor branch to outdoor unit ≤ 10 m(33 ft),

equivalent length : max 13 m(43 ft) (for 14 Ton or more)

Additional Application

To satisfy below condition to make 40 m(131 ft) ~ 90 m(295 ft) of

pipe length after first branch.

• Diameter of pipes between first branch and the last branch

should be increased by one step, except pipe diameter B,C,D is

same as Diameter A

Ø 1/4(6.35 mm) ’ Ø 3/8(9.52 mm) ’ Ø 1/2(12.7 mm) ’

Ø 5/8(15.88 mm) ’ Ø 3/4(19.05 mm) ’ Ø 7/8(22.2 mm) ’

Ø 1(25.4)*, Ø 1-1/8(28.58 mm) ’ Ø 1-1/4(31.8 mm)*,

Ø 1-3/8(34.9 mm) ’ Ø 1-1/2(38.1 mm)* ’ Ø 1-5/8(41.3 mm)

* : It is not necessary to size up.

h If the step up size is not available, you can not select the next

higher size available.

•

While calculating whole refrigerant pipe length, pipe B,C,D length

should be calculated twice.

A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1 000 m(3 281 ft)

• Length of pipe from each indoor unit to the closest branch

(a,b,c,d,e) ≤ 40 m(131 ft)

• [Length of pipe from outdoor unit to the farthest indoor unit 5

(A+B+C+D+e)]

- [Length of pipe from outdoor unit to the closest indoor unit 1

(A+a)] ≤ 40 m(131 ft)

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 21

ENGLISH

(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)

ODU

capacity

(HP(ton))

Pipe diameter when pipe

Length is <90 m (295 ft)

(Standard)

Pipe diameter when pipe

length (ODU ↔ IDU)

is ≥90 m (295 ft)

Pipe diameter when height

differential (ODU ↔ IDU)

is >50 m (164 ft)

Liquid pipe

[mm(inch)]

Vapor pipe

[mm(inch)]

Liquid pipe

[mm(inch)]

Vapor pipe

[mm(inch)]

Liquid pipe

[mm(inch)]

Vapor pipe

[mm(inch)]

Outdoor unit Connection

WARNING

• In case of pipe diameter B connected after first branch is bigger

than the main pipe diameter A, B should be of the same size with A.

Ex) In case indoor unit combination ratio ratio 130 % is connected to

24 HP(70 kW) outdoor unit.

1) Outdoor unit main pipe diameter A : Ø 34.9(1-3/8, gas pipe),

Ø 15.88(5/8, liquid pipe)

2) Pipe diameter B after first branch according to 130 % indoor

unit combination(91 kW) : Ø 34.9(1-3/8, gas pipe),

Ø 19.05(3/4, liquid pipe)

Therefore, pipe diameter B connected after first branch

would be Ø 34.9(1-3/8, gas pipe) / Ø 15.88(5/8, liquid pipe)

which is same with main pipe diameter.

[Example]

Instead of using indoor unit total capacity, use outdoor unit model

name in order to choose main pipe diameter by downward.

Do not let the connection pipe from branch to branch exceed the

main pipe diameter chosen by outdoor unit model name.

EX) Where connecting the indoor units to the 24 HP(70 kW) outdoor

unit to 130 % of its system capacity (91 kW) and branching

7 kBtu/h(2.2 kW) indoor unit at the 1st branch

Main pipe diameter (24 HP outdoor unit) outdoor unit): Ø 28.58

(1-1/8, Gas pipe) Ø 15.88(5/8, Liquid pipe)

Pipe diameter between 1st and 2nd branch (88.5 kW indoor

units) : Ø 34.9(1-3/8, Gas pipe) Ø 19.05(3/4, Liquid pipe) in

conformity with downward indoor units.

Since the main pipe diameter of 24 HP(20 Ton) outdoor unit is

Ø 28.58(1-1/8, Gas pipe) and Ø 15.88(5/8, Liquid pipe), Ø 28.58(1-

1/8, Gas pipe) and Ø 15.88(5/8, Liquid pipe) is used as the main

pipe and the connection pipe between 1st and 2nd branch.

Indoor Unit Connection

Indoor Unit connecting pipe from branch (a,b,c,d,e,f)

Indoor Unit capacity

[kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe [mm(inch)]

≤ 5.6(19 100)

Ø 6.35(1/4) Ø 12.7(1/2)

< 16.0(54 600) Ø 9.52(3/8) Ø 15.88(5/8)

< 22.4(76 400) Ø 9.52(3/8) Ø 19.05(3/4)

(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)

Downward indoor unit

total capacity [kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

≤ 5.6(19 100)

Ø 6.35(1/4) Ø 12.7(1/2)

< 16.0(54 600) Ø 9.52(3/8) Ø 15.88(5/8)

≤ 22.4(76 400)

Ø 9.52(3/8) Ø 19.05(3/4)

< 33.6(114 700) Ø 9.52(3/8) Ø 22.2(7/8)

< 50.4(172 000) Ø 12.7(1/2) Ø 28.58(1-1/8)

< 67.2(229 400) Ø 15.88(5/8) Ø 28.58(1-1/8)

< 72.8(248 500) Ø 15.88(5/8) Ø 34.9(1-3/8)

< 100.8(344 000) Ø 19.05(3/4) Ø 34.9(1-3/8)

< 173.6(592 500) Ø 19.05(3/4) Ø 41.3(1-5/8)

(Table 4) Conditional Application

WARNING

• In case of pipe diameter B connected after first branch is bigger than

the main pipe diameter A, B should be of the same size with A.

Ex) In case indoor unit combination ratio 120 % is connected to

24 HP(67.2 kW) outdoor unit.

1) Outdoor unit main pipe diameter A : Ø 34.9(Gas pipe),

Ø 15.88(liquid pipe)

2) Pipe diameter B after first branch according to 120 % indoor

unit ombination(80.6 kW) : Ø 34.9(gas pipe), Ø 19.05(liquid pipe)

Therefore, pipe diameter B connected after first branch would

be Ø 34.9(gas pipe) / Ø 15.88(liquid pipe) which is same with

main pipe diameter.

Condition Example

Diameter of pipes

between first branch

and the last branch

should be increased by

one step, except pipe

diameter B,C,D is same

as Diameter A

40 m [131 ft] <

B+C+D+e

90 m [295 ft]

’ B, C, D

Change a diameter

While calculating whole

refrigerant pipe length,

pipe B,C,D length

should be calculated

twice.

A+Bx2+Cx2+Dx2

+a+b+c+d+e ≤

1 000 m [3 281 ft]

Length of pipe from

each indoor unit to the

closest branch

a,b,c,d,e ≤

40 m [131 ft]

Length of pipe from

outdoor unit to the

farthest indoor unit 5

(A+B+C+D+e)] -

[Length of pipe outdoor

unit to the closest

indoor unit 1 (A+a)] ≤

40 m [131 ft]

(A+B+C+D+e)-(A+a)

≤ 40 m [131 ft]

• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.

Ø 6.35(1/4) ’ Ø 9.52(3/8), Ø 9.52(3/8) ’

Ø 12.7(1/2), Ø 12.7(1/2) ’ Ø 15.88(5/8),

Ø 15.88(5/8) ’ Ø 19.05(3/4),

Ø 19.05(3/4) ’ Ø 22.2(7/8), Ø 22.2(7/8) ’

Ø 25.4(1), Ø 25.4(1) ’ Ø 28.58(1-1/8),

Ø 28.58(1-1/8) ’ Ø 31.8(1-1/4),

Ø 31.8(1-1/4) ’ Ø 34.9(1-3/8),

Ø 34.9(1-3/8) ’ Ø 38.1(1-1/2)

h 40 m [131 ft]

H 110 m [361 ft]

Indoor

Unit

8(6) Ø 9.52(3/8) Ø 19.05(3/4) Ø 12.7(1/2) Ø 22.2(7/8) Ø 12.7(1/2) Not increased

10(8) Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 12.7(1/2) Not increased

12(10)~14(12)

Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Not increased Ø 15.88(5/8) Not increased

18(14)~22(18)

Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4) Ø 31.8(1-1/4) Ø 19.05(3/4) Not increased

24(20) Ø 15.88(5/8) Ø 34.9(1-3/8) Ø 19.05(3/4) Not increased Ø 19.05(3/4) Not increased

26~34(22~28)

Ø 19.05(3/4) Ø 34.9(1-3/8) Ø 22.2(7/8) Ø 38.1(1-1/2) Ø 22.2(7/8) Not increased

36~50(30~42)

Ø 19.05(3/4) Ø 41.3(1-5/8) Ø 22.2(7/8) Not increased Ø 22.2(7/8) Not increased

• Bending radius should be

at least twice the

diameter of the pipe.

• Bend pipe after 500 mm

[19.7 inch] or more from

branch(or header).

Do not bend U type.

It may affect performance

or result in noise.

If U type bending is

required the R should be

more than 200 mm

[7.9 inch].

CAUTION

500 mm [19.7 inch]

or more

500 mm [19.7 inch]

or more

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 22

ENGLISH

Pipe Connection Method/Precautions for

Series connections between Outdoor units

- Separate Y branch joints are needed for series connections between

outdoor units.

- Y-branches between the outside units must be installed horizontally.

- Please refer to the below connection examples to install pipe

connections between outdoor units.

Pipe connection between outdoor

units (General Case)

The maximum pipe

length after the ﬁrst

branching between the

outdoor units is 10 m

[32.8 ft] or less

Oil Trap

Pipes between outdoor units

are 2 m [6.6 ft] or less

2 m [6.6 ft] or less

- If the distance between the outdoor units becomes more than 2 m

[6.6 ft], apply Oil Traps between the gas pipes.

- If the outdoor unit is located lower than the main pipe, apply Oil Trap.

Examples of Wrong Pipe Connections

- If outside units are located at different level, oil trap must be installed

after each Y branch.

- Oil trap should be located at same level of Y branch. (Heat Pump :

High Pressure Vapor / Heat Recovery : High Pressure Vapor & Low

Pressure Vapor)

Pipes between outdoor units

are 2 m [6.6 ft] or longer

Oil Trap

Oil Trap Oil Trap

2 m [6.6 ft] or less

2 m [6.6 ft] or less 2 m [6.6 ft] or less

0.2 m [0.66 ft]

2 m [6.6 ft] or longer

Level

Oil Trap

Level Level

Oil Trap

Toward indoor unit

Pipe inclination (2° or more)

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

- Apply Oil Trap as shown below when the length of the pipe between

the outdoor units is more than 2 m [6.6 ft]. Otherwise, the unit may

not operate properly.

(Example 1)

Toward indoor unit

≤ 2 m [6.6 ft]

Toward indoor unit

≤ 2 m [6.6 ft]

≥ 2 m [6.6 ft]

≥ 0.2 m [0.66 ft]

Oil Trap

(Example 2)

- If pipe is higher than outside unit, oil trap must be installed after each

Y branch.

- Oil trap should be located at same level of Y branch. (Heat Pump :

High Pressure Vapor / Heat Recovery : High Pressure Vapor & Low

Pressure Vapor)

- The pipes between the outdoor units must maintain horizontal

levelness or give an inclination to prevent a back flow toward the

slave outdoor unit. Otherwise, the unit may not operate properly.

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 23

ENGLISH

≥ 0.2 m [0.66 ft]

Toward indoor unit

Oil Trap

(Example 3)

Amount refrigerant of Indoor units

Example) 4Way Ceiling Cassette 14.5 kW(48 kBtu/hr) -1 EA,

Ceiling concealed Duct 7.3 kW(24 kBtu/hr)-2 EA,

Wall Mounted 2.3 kW(7 kBtu/hr)-4 EA

CF = [0.64 kg (1.411 lbs)×1 EA] + [0.26 kg (0.573 lbs)×

2 EA] + [0.26 kg (0.529 lbs)×4 EA]

= 2.12 kg (4.67 lbs)

WARNING

• Regulation for refrigerant leakage

: the amount of refrigerant leakage should satisfy the following

equation for human safety.

If the above equation can not be satisfied, then follow the

following steps.

• Selection of air conditioning system: select one of the next

- Installation of effective opening part

- Reconfirmation of Outdoor Unit capacity and piping length

- Reduction of the amount of refrigerant

- Installation of 2 or more security device (alarm for gas leakage)

• Change Indoor Unit type

installation position should be over 2 m (6.6 ft) from the floor (Wall

mounted type ’ Cassette type)

• Adoption of ventilation system

: choose ordinary ventilation system or building ventilation

system

• Limitation in piping work

: Prepare for earthquake and thermal stress

Volume of the room at which Indoor Unit of

the least capacity is installed

Total amount of refrigerant in the system

≤0.44 kg/m

(0.028 lbs/ft

)

Toward indoor unit

(Example 2)

Attach the additional refrigerant table of IDU.

The amount of Refrigerant

The calculation of the additional charge should take into account the

length of pipe and CF(correction Factor) value of indoor unit.

Include only for

Heat Recovery

system

Total liquid pipe : Ø 25.4 mm (1.0 inch)

Additional charge[kg(lbs)]

Total liquid pipe : Ø 22.2 mm (7/8 inch)

Total liquid pipe : Ø 19.05 mm (3/4 inch)

Total liquid pipe : Ø 15.88 mm (5/8 inch)

Total liquid pipe : Ø 12.7 mm (1/2 inch)

Total liquid pipe : Ø 9.52 mm (3/8 inch)

Total liquid pipe : Ø 6.35 mm (1/4 inch)

Number of installed HR units

CF value of indoor unit

× 0.480 kg/m (0.323 lbs/ft)

× 0.354 kg/m (0.238 lbs/ft)

× 0.266 kg/m (0.179 lbs/ft)

× 0.173 kg/m (0.116 lbs/ft)

× 0.118 kg/m (0.079 lbs/ft)

× 0.061 kg/m (0.041 lbs/ft)

× 0.022 kg/m (0.015 lbs/ft)

× 0.5 kg (1.1 lbs)

※ 6 & 8 Branches

Model : 1.0 kg/EA

(2.2 lbs/EA)

- When connecting the pipes between the outdoor units, the

accumulation of oil in the slave outdoor unit should be avoided.

Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 24

ENGLISH

For Heat Recovery System Installation

Ⓐ Manifold Gauge

Ⓑ Low pressure side Handle

For Heat Pump System Installation

Ⓐ Manifold Gauge

Ⓑ Low Pressure Side Handle

WARNING

• Pipe to be vacuumed : gas pipe, liquid pipe

• If the refrigerant amount is not exact, it may not operate

properly.

• If additionally bottled refrigerant amount is over 10 %,

condenser burst or insufficient indoor unit performance may be

caused.

• Low pressure gas pipe should be sealed with a cap in piping

accessories during refrigerant charging.

Y branch

Facing

upwards

Facing

downwards

Within ±3° Within ±3°

Viewed from point A

in direction of arrow

Horizontal

plane

Within +/- 10°

Insulator

(included with kit)

Liquid and gas

pipe joints

Insulator for

ﬁeld piping

Tape

(ﬁeld supply)

Ⓐ To Branch Piping or Indoor Unit

Ⓑ To Outdoor Unit

• Ensure that the branch pipes are attached horizontally or vertically.

(see the diagram below.)

• There is no limitation on the joint mounting configuration.

• If the diameter of the refrigerant piping selected by the procedures

described is different from the size of the joint, the connecting

section should be cut with a pipe cutter.

• Branch pipe should be insulated with the insulator in each kit.

Branch pipe Fitting

• When the number of indoor units to be connected to the branch

pipes is less than the number of branch pipes available for

connection then cap pipes should be fitted to the surplus branches.

Pinched pipe

Header

Ⓐ To Outdoor Unit

Ⓑ To Indoor Unit

• The indoor unit having larger

capacity must be installed closer

to Ⓐ than smaller one.

• If the diameter of the refrigerant

piping selected by the

procedures described is

different from the size of the

joint, the connecting section

should be cut with a pipe cutter.

• When the number of pipes to be

connected is smaller than the

number of header branches,

install a cap to the unconnected

branches.

• Fit branch pipe lie in a horizontal plane.

Horizontal plane

View from point B in the direction of the arrow

Refrigerant charging

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure

Gas Pipe

Liquid Pipe

Not used

Gas Pipe

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 25

ENGLISH

For Heat Recovery System Installation

• Header should be insulated with the insulator in each kit.

• Joints between branch and pipe should be sealed with the tape

included in each kit.

• Any cap pipe should be insulated using the insulator provided with

each kit and then taped as described above.

Insulate the header using

the insulation

material attached to the

branch pipe kit

as shown in the ﬁgure.

Insulator

Insulator of ﬁeld pipe

Tape

Cap pipe

Insulator for cap pipe

Y branch pipe

[Unit : mm(inch)]

Models Pipe

ARBLB01621

Low-Pressure Vapor Pipe

I.D12.7(1/2)

I.D15.88(5/8)

I.D12.7(1/2)

I.D15.88(5/8)

I.D19.05(3/4)

O.D15.88(5/8)

I.D15.88(5/8)

Liquid pipe

I.D12.7(1/2)

O.D9.52(3/8)

I.D9.52(3/8)

I.D6.35(1/4)

I.D9.52(3/8)

I.D6.35(1/4)

I.D. 9.52(3/8)

I.D6.35(1/4)

High-Pressure Vapor Pipe

I.D9.52

(3/8)

I.D9.52

(3/8)

I.D6.35(

1/4)

I.D12.7(1/2)

I.D15.88(5/8)

Models Pipe

ARBLB03321

Low-Pressure Vapor Pipe

O.D19.05(3/4)

I.D 22.2(7/8)

O.D19.05(3/4)

I.D25.4(1)

I.D28.58(1-1/8)

I.D19.05(3/4)

I.D22.2(7/8)

I.D15.88(5/8)

I.D19.05(3/4)

I.D12.7(1/2)

I.D15.88(5/8)

I.D19.05(3/4)

I.D25.4(1)

O.D19.05(3/4)

Liquid pipe

I.D9.52(3/8)

I.D12.7(1/2)

I.D9.52(3/8)

I.D6.35(1/4)

I.D12.7(1/2)

I.D9.52(3/8)

I.D12.7(1/2)

I.D6.35(1/4)

High-Pressure Vapor Pipe

I.D19.05(3/4)

O.D19.05(3/4)

I.D9.52

(3/8)

I.D6.35(

1/4)

I.D22.2(7/8)

I.D12.7(1/2)

I.D15.88(5/8)

ARBLB07121

Low-Pressure Vapor Pipe

I.D28.58(1-1/8)

I.D31.8(1-1/4)

I.D34.9(1-3/8)

O.D31.8(1-1/4)

I.D28.58(1-1/8)

I.D31.8(1-1/4)

O.D22.2(7/8)

I.D22.2(7/8)

O.D19.05(3/4)

I.D28.58(1-1/8)

I.D19.05(3/4)

I.D15.88(5/8)

I.D12.7(1/2)

I.D15.88(5/8)

I.D22.2(7/8)

I.D19.05(3/4)

Liquid pipe

I.D12.7(1/2)

I.D15.88(5/8)

I.D19.05(3/4)

I.D15.88(5/8)

I.D19.05(3/4)

I.D12.7(1/2)

I.D19.05(3/4)

I.D15.88(5/8)

I.D9.52(3/8)

O.D12.7(1/2)

I.D6.35(1/4)

I.D9.52(3/8)

O.D12.7(1/2)

High-Pressure Vapor Pipe

I.D28.58(1-1/8)

O.D19.05(3/4)

I.D19.05(3/4)

I.D25.4(1)

I.D9.52

(3/8)

I.D22.2(7/8)

I.D12.7(1/2)

I.D15.88(5/8)

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 26

ENGLISH

For Heat Pump System Installation

Models Pipe

ARBLN01621

Gas pipe

I.D19.05(3/4)

O.D15.88(5/8)

I.D12.7(1/2)

I.D15.88(5/8)

I.D12.7(1/2)

292(11-1/2)

281(11-1/16)

(2-29/32)

70(2-3/4)

Liquid pipe

I.D12.7(1/2)

292(11-1/2)

281(11-1/16)

(2-29/32)

70(2-3/4)

I.D6.35(1/4)

I.D9.52(3/8)

O.D9.52(3/8)

Models Pipe

ARBLN03321

Gas pipe

413(16-1/4)

390(15-11/32)

I.D19.05(3/4)

I.D12.7(1/2)

I.D12.7

(1/2)

70(2-3/4)

I.D15.88(5/8)

I.D25.4(1)

O.D25.4(1)

80(3-5/32)

110(4-11/32)

(3-9/32)

O.D19.05(3/4)

1 2

I.D22.2(7/8)

I.D28.58(1-1/8)

Liquid pipe

I.D12.7(1/2)

(2-29/32)

332(13-1/16)

321(12-5/8)

I.D6.35(1/4)

I.D9.52(3/8)

ARBLN07121

Gas pipe

I.D12.7

(1/2)

376(14-13/16)

404(15-29/32)

120(4-23/32) 120(4-23/32)

90(3-17/32)

I.D15.88(5/8)

1 3

I.D19.05(3/4)

O.D19.05(3/4)

(3-25/32)

I.D22.2(7/8)

O.D22.2(7/8)

I.D34.9(1-3/8)

I.D28.58(1-1/8)

O.D31.8(1-1/4)

I.D31.8(1-1/4)

Liquid pipe

I.D15.88(5/8)

I.D12.7(1/2)

O.D12.7(1/2)

70(2-3/4)

110(4-11/32)

371(14-19/32)

394(15-1/2)

(3-9/32)

I.D19.05(3/4)

I.D6.35(1/4)

I.D9.52(3/8)

ARBLN14521

Gas pipe

I.D12.7(1/2)

70(2-3/4)

471(18-17/32)

517(20-11/32)

125

(4-29/32)

130(5-1/8)

I.D15.88(5/8)

I.D41.3(1-5/8)

I.D41.3

(1-5/8)

I.D41.3(1-5/8)

I.D38.1(1-1/2)

O.D38.1(1-1/2)

O.D15.88(5/8)

120(4-23/32)

90(3-17/32)

I.D19.05(3/4)

I.D22.2(7/8)

O.D22.2(7/8)

I.D34.9(1-3/8)

O.D34.9(1-3/8)

I.D28.58(1-1/8)

O.D28.58(1-1/8)

I.D28.58(1-1/8)

Liquid pipe

I.D12.7(1/2)

O.D12.7(1/2)

I.D12.7

(1/2)

110(4-11/32)110(4-11/32)

41616-3/8)

444(17-15/32)

O.D15.88(5/8)

I.D15.88(5/8)

I.D19.05(3/4)

I.D15.88(5/8)

I.D19.05(3/4)

O.D19.05(3/4)

80(3-5/32)

2 3 3

(3-25/32)

I.D22.2(7/8)

I.D6.35(1/4)

I.D9.52(3/8)

Models Pipe

ARBLB14521

Low-Pressure Vapor Pipe

I.D38.1(1-1/2)

I.D41.3(1-5/8)

O.D34.9(1-3/8)

I.D41.3(1-5/8)

O.D38.1(1-1/2)

I.D19.05(3/4)

O.D22.2(7/8)

I.D15.88(5/8)

I.D12.7(1/2)

O.D15.88(5/8)

I.D22.2(7/8)

O.D28.58(1-1/8)

I.D19.05(3/4)

I.D34.9(1-3/8)

I.D41.3(1-5/8)

I.D38.1(1-1/2)

I.D34.9(1-3/8)

I.D28.58(1-1/8)

I.D22.2(7/8)

I.D34.9(1-3/8)

Liquid pipe

I.D15.88(5/8)

I.D19.05(3/4)

I.D22.2(7/8)

I.D12.7(1/2)

I.D9.52(3/8)

I.D6.35(1/4)

I.D19.05(3/4)

O.D19.05(3/4)

I.D15.88(5/8)

O.D15.88(5/8)

O.D12.7(1/2)

High-Pressure Vapor Pipe

O.D28.58(1-1/8)

I.D28.58(1-1/8)

I.D34.9(1-3/8)

O.D19.05(3/4)

I.D19.05(3/4)

I.D25.4(1)

I.D9.52

(3/8)

I.D22.2(7/8)

I.D12.7(1/2)

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 27

ENGLISH

[Unit:mm(inch)]

Header

Models Pipe

4 branch

ARBL054

Gas pipe

120(4-23/32)

150(5-29/32)

360(14-3/16)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

ID12.7(1/2)

ID15.88(5/8)

Liquid pipe

120(4-23/32)

150(5-29/32)

360(14-3/16)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

7 branch

ARBL057

Gas pipe

540(21-1/4)

120(4-23/32)

150(5-29/32)

120(4-23/32)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

ID15.88(5/8)

Liquid pipe

540(21-1/4)

120(4-23/32)

150(5-29/32)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

4 branch

ARBL104

Gas pipe

120(4-23/32)

150(5-29/32)

400(15-3/4)

160

ID19.05(3/4)

ID15.88(5/8)

ID22.2(7/8)

ID28.58(1-1/8) ID25.4(1)

ID15.88(5/8)

ID12.7(1/2)

Liquid pipe

120(4-23/32)

150(5-29/32)

360(14-3/16)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

7 branch

ARBL107

Gas pipe

120(4-23/32)

150(5-29/32)

160

580(22-27/32)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID22.2(7/8)ID28.58(1-1/8) ID25.4(1)

Liquid pipe

120(4-23/32)

150(5-29/32)

700(27-9/16)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)ID12.7(1/2)

Models Pipe

10 branch

ARBL1010

Gas pipe

120(4-23/32)

150(5-29/32)

160

760(29-29/32)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID22.2(7/8)ID28.58(1-1/8) ID25.4(1)

Liquid pipe

120(4-23/32)

150(5-29/32)

720(28-11/32)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID12.7(1/2)

ID9.52(3/8)

120(4-23/32)

10 branch

ARBL2010

Gas pipe

ID28.58(1-1/8)ID31.8(1-1/4) ID34.9(1-3/8)

120(4-23/32)

150(5-29/32)

182

775(30-1/2)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

Liquid pipe

120(4-23/32)

150(5-29/32)

107

60*9=540(21-1/4)

700(27-9/16)

ID6.35(1/4)

ID9.52(3/8) ID19.05(3/4)ID15.88(5/8)

ID9.52(3/8)

ID6.35(1/4)

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 28

ENGLISH

This function is used for creating vacuum in the system after

compressor replacement, ODU parts replacement or IDU addition /

replacement.

Vacuum mode setting method

ARUM***B(D)TE5

ARUM***CTE5

Vacuum mode off method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“SVC” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button : :

“Se3” Push the ‘●’ button

Start the vacuum mode : “VACC”

ODU Valve open

ODU EEV open

IDU EEV open

HR unit valve open, SC EEV open

DIP switch off and push the reset button on Master unit PCB

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW01D (reset)

SW03C (ȯ: forward)

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW01D (reset)

SW03C (ȯ: forward)

- Ensure that the branch pipes are attached vertically.

Slave

Master

Header

Slave

Master

Slave

Master

Slave

Master

Vertical Distribution

The others

Vacuum Mode

Slave

Master

Slave

Master

1st

Main pipe

Distribution

2nd

3rd

Main pipe

Distribution

Slave

Master

1st

3rd

3rd main pipe distribution

2nd

Horizontal Distribution

Distribution Method

ODU operation stops during vacuum mode. Compressor can't

operate.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 29

ENGLISH

Series Installation (Heat Pump)

Liquid Pipe

No use (closed)

Gas Pipe

Liquid Pipe

No use (closed)

Gas Pipe

Slave 1 outdoor unit Master outdoor unit

Nitrogen Gas

Cylinder

Indoor

Unit

Liquid Pipe

Gas Pipe

NOTE

If the ambient temperature differs between the time when pressure is

applied and when the pressure drop is checked, apply the following

correction factor

There is a pressure change of approximately 0.01 Mpa(1.5 psi) for each

33.8 °F (1 °C) of temperature difference.

Correction= (Temp. at the time of pressurization – Temp. at the time of

check) X 0.1

For example: Temperature at the time of pressurization 3.8

MPa(551 psi) is 80.6 °F (27 °C)

24 hour later: 3.73 MPa(541 psi), 68 °F (20 °C)

In this case the pressure drop of 0.07 MPa

(10 psi) is because of temperature drop

And hence there is no leakage in pipe occurred.

WARNING

Use a vacuum pump or Inert(nitrogen) gas when doing leakage test

or air purge. Do not compress air or Oxygen and do not use

Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

Vacuum

Vacuum drying should be made from the service port provided on the outdoor

unit’s service valve to the vacuum pump commonly used for liquid pipe, gas

pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas

pipe and high/low pressure common pipe with the service valve closed.)

* Never perform air purging using refrigerant.

• Vacuum drying: Use a vacuum pump that can evacuate to -100.7 kPa

(-14.6 psi, 5 Torr, -755 mmHg).

- Evacuate the system from the liquid and gas pipes with a vacuum

pump for over 2 hrs and bring the system to -100.7 kPa(-14.6 psi).

After maintaining system under that condition for over 1 hr, confirm

the vacuum gauge rises. The system may contain moisture or leak.

- Following should be executed if there is a possibility of moisture

remaining inside the pipe.

(Rainwater may enter the pipe during work in the rainy season or

over a long period of time)

After evacuating the system for 2 hrs, give pressure to the system

to 0.05 MPa(7.3 psi) (vacuum break) with nitrogen gas and then

evacuate it again with the vacuum pump for 1hr to -100.7 kPa

(-14.6 psi)(vacuum drying). If the system cannot be evacuated to

-100.7 kPa(-14.6 psi) within 2 hrs, repeat the steps of vacuum break

and its drying. Finally, check if the vacuum gauge does not rise or

not, after maintaining the system in vacuum for 1 hr.

When inserting nitrogen

gas of high pressure, it

must be used with

regulator.

WARNING

Use a vacuum pump or Inert(nitrogen) gas when doing leakage test

or air purge. Do not compress air or Oxygen and do not use

Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

Series Installation (Heat Recovery)

Scale

Use a graviometer. (One that can measure

down to 0.1 kg (0.22 lbs)). If you are

unable to prepare such a high-precision

gravimeter you may use a charge cylinder.

Vacuum

pump

Vacuum

pump

Indoor unit

Slave 1 outdoor unit Master outdoor unit

Liquid pipe

High Pressure

Gas pipe

High Pressure

Gas pipe

Liquid pipe

Low Pressure

Gas pipe

Low Pressure

Gas pipe

Liquid side

Gas side

HR unit

Series Installation (Heat Pump)

Scale

Use a graviometer. (One that can measure

down to 0.1 kg (0.22 lbs)). If you are

unable to prepare such a high-precision

gravimeter you may use a charge cylinder.

Indoor unit

Liquid pipe

Gas pipe

Liquid pipe

No use (closed)

Liquid side

Gas side

Slave 1 outdoor unit Master outdoor unit

Leak test

Leak test should be made by pressurizing nitrogen gas to 3.8 MPa

(551.1 psi). If the pressure does not drop for 24 hours, the system

passes the test. If the pressure drops, check where the nitrogen leaks.

For the test method, refer to the following figure. (Make a test with

the service valves closed. Be also sure to pressurize liquid pipe, gas

pipe and high pressure gas pipe)

The test result can be judged good if the pressure has not be reduced

after leaving for about one day after completion of nitrogen gas

pressurization.

Series Installation (Heat Recovery)

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure

Gas Pipe

Liquid Pipe

Low Pressure

Gas Pipe

High Pressure

Gas Pipe

Nitrogen Gas

Cylinder

Nitrogen Gas

Cylinder

Slave 1 outdoor unit Master outdoor unit

Indoor

Unit

Liquid Pipe

HR unit

Gas Pipe

Leak Test and Vacuum drying

When inserting nitrogen

gas of high pressure, it

must be used with

regulator.

To prevent the nitrogen from entering the refrigeration system in

the liquid state, the top of the cylinder must be at higher position

than the bottom when you pressurize the system.

Usually the cylinder is used in a vertical standing position.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 30

ENGLISH

NOTE

Always add an appropriate amount of refrigerant. (For the refrigerant

additional charge)

Too much or too little refrigerant will cause trouble.

To use the Vacuum Mode (If the Vacuum mode is set, all valves of Indoor

units and Outdoor units will be opened.)

WARNING

When installing and moving the air conditioner to another site,

recharge after perfect evacuation.

- If a different refrigerant or air is mixed with the original

refrigerant, the refrigerant cycle may malfunction and the unit

may be damaged.

Be sure to give insulation work to refrigerant piping by covering liquid

pipe and gas pipe separately with enough thickness heat-resistant

polyethylene, so that no gap is observed in the joint between indoor

unit and insulating material, and insulating materials themselves. When

insulation work is insufficient, there is a possibility of condensation

drip, etc. Pay special attention to insulation work to ceiling plenum.

Ⓐ Heat insulation material

Ⓑ Pipe

insulation material with a finishing tape.)

Heat insulation

material

Adhesive + Heat - resistant

polyethylene foam + Adhesive tape

Outer

covering

Indoor Vinyl tape

Floor

exposed

Water-proof hemp cloth +

Bronze asphalt

Outdoor

Water-proof hemp cloth +

Zinc plate + Oily paint

NOTE

When using polyethylene cover as covering material, asphalt

roofing shall not be required.

Thermal insulation of refrigerant piping

Bad example

• Do not insulate gas or low pressure pipe and liquid or

highpressure pipe together.

• Be sure to fully insulate connecting portion.

Ⓐ

These parts are not insulated.

Ⓐ Liquid pipe

Ⓑ Gas pipe

Ⓓ

Finishing tape

Ⓔ

Insulating material

Ⓕ

Communication lines

Good example

Ⓐ Liquid pipe

Ⓑ Gas pipe

Ⓓ

Insulating material

Ⓔ

Communication lines

Separation

Power lines

1 m

(3.28 ft)

1 m

(3.28 ft)

Penetrations

Ⓐ Sleeve

Ⓑ Heat insulating material

Ⓓ Caulking material

Ⓔ Band

Ⓕ Waterproofing layer

Ⓖ Sleeve with edge

Ⓗ Lagging material

Ⓘ Mortar or other incombustible caulking

Ⓙ Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so

that the insulation material will not be caved in. For this part, use

incombustible materials for both insulation and covering. (Vinyl covering

should not be used.)

Inner wall (concealed) Outer wall Outer wall (exposed)

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 31

ENGLISH

Caution

- Follow ordinance of your governmental organization for technical

standard related to electrical equipment, wiring regulations and

guidance of each electric power company.

Install the Outdoor Unit communication cable away from the power

source wiring so that it is not affected by electric noise from the power

source. (Do not run it through the same conduit.)

- Be sure to provide designated grounding work to Outdoor Unit.

- Give some allowance to wiring for electrical part box of Indoor and

Outdoor Units, because the box is sometimes removed at the time of

service work.

- Never connect the main power source to terminal block of

communication cable. If connected, electrical parts will be burnt out.

- Use the 2-core shielded wires or 2-core unshielded wires for

communication cable.( mark in the figure below) If communication

cable of different systems are wired with the same multiplecore

cable, the resultant poor transmitting and receiving will cause

erroneous operations. ( mark in the figure below)

- Only the communication cable specified should be connected to the

terminal block for Outdoor Unit communication.

WARNING

Be sure to have authorized electrical engineers do the electric

work using special circuits in accordance with regulations and this

installation manual.

If power supply circuit has a lack of capacity or electric work

deficiency, it may cause an electric shock or fire.

ELECTRICAL WIRING

Master Slave

Master Slave1 Slave2

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

2-core shielded cables or 2-core unshielded wires

Multi-Core Cable

Master Slave1 Slave2

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Master Slave

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Remote

control

Indoor

Unit

Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal

block.

Round pressure terminal

Power cable

When none are available, follow the instructions below.

- Do not connect wiring of different thicknesses to the power terminal

block. (Slack in the power wiring may cause abnormal heat.)

- When connecting cable which is the same thickness, do as shown in

the figure below.

- For wiring, use the designated power cable and connect firmly, then

secure to prevent outside pressure being exerted on the terminal

block.

- Use an appropriate screwdriver for tightening the terinal screws. A

screwdriver with a small head will strip the head and make proper

tighterning impossible.

- Over-tightening the terminal screws may break them.

Be sure to correct the outdoor unit to earth. Do not connect ground

wire to any gas pipe, liquid pipe, lightening rod or telephone earth

line. If earth is incomplete, it may cause an electric shock.

CAUTION

• Use the 2-core shielded wires or 2-core unshielded wires for

communication cables. Never use them together with power cables.

• The conductive shielding layer of cable should be grounded to the

metal part of both units.

• Never use multi-core cable

• As this unit is equipped with an inverter, to install a phase leading

capacitor not only will deteriorate power factor improvement effect,

but also may cause capacitor abnormal heating. Therefore, never

install a phase leading capacitor.

• Make sure that the power unbalance ratio is not greater than 2 %.

If it is greater the units lifespan will be reduced.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 32

ENGLISH

Front Panel

UXA

UXB

Main Board

External Board

Main power line

terminal block

(Take care of the phase

sequence of 3-phases

3-wires power system)

WARNING

The temperature sensor for outdoor air should not be exposed to

direct sunlight.

- Provide an appropriate cover to intercept direct sunlight.

NOTE

• The figures are based on assumed length of parallel cabling up

to 100 m [328 ft]. For length in excess of 100 m [328 ft] the

figures will have to be recalculated in direct proportion to the

additional length of cable involved.

• If the power supply waveform continues to exhibit some

distortion the recommended spacing in the table should be

increased.

- If the cable are laid inside conduits then the following point

must also be taken into account when grouping various cable

together for introduction into the conduits

- Power cable(including power supply to air conditioner) and

communication cables

must not be laid inside the same

- In the same way, when grouping the power wires and

communication cables should not be bunched together.

Separation of communication and power cables

- If communication and power cables are installed alongside each other

then there is a strong likelihood of operational faults developing due

to interference in the signal wiring caused by electrostatic and

electromagnetic coupling.

The tables below indicates our recommendation as to appropriate

spacing of communication and power cables where these are to be

run side by side

Communication and Power Cables

Communication cable

- Types : shielded wires or unshielded wires

- Cross section : 1.0 ~ 1.5 mm

(1.55 × 10

-3

~ 2.32 × 10

-3

)

- Maximum allowable temperature: 60 °C (140 °F)

- Maximum allowable cable length: under 1 000 m (3 281 ft)

Remote control cable

- Types : 3-core cables

Central control cable

Product type Cable type Diameter

ACP&AC Manager

2-core cable (Shielding cable)

1.0 ~ 1.5 mm

(1.55 × 10

-3

2.32 × 10

-3

)

AC Smart

2-core cable (Shielding cable)

1.0 ~ 1.5 mm

(1.55 × 10

-3

2.32 × 10

-3

)

Simple central controller

4-core cable (Shielding cable)

1.0 ~ 1.5 mm

(1.55 × 10

-3

2.32 × 10

-3

)

Current capacity of power cable Spacing

100 V or more

10 A 300 mm (11-13/16 inch)

50 A 500 mm (19-11/16 inch)

100 A 1 000 mm (39-3/8 inch)

Exceed 100 A 1 500 mm (59-1/16 inch)

Control box and connecting position of wiring

- Remove all of the screws at front panel and remove the panel by

pulling it forward.

- Connect communication cable between main and slave outdoor unit

through the terminal block.

- Connect communication cables between outdoor unit and indoor

units through the terminal block.

- When the central control system is connected to the outdoor unit, a

dedicated PCB must be connected between them.

- When connecting communication cable between outdoor unit and

indoor units with shielded cable, connect the shield ground to the

earth screw.

- Be sure to also make grounding connections to ground screws when

connecting shielded wires to the central control system.

In case of using the shielded wires, it should be grounded.

CAUTION

If apparatus is not properly earthed then there is always a risk of

electric shock, the grounding of the apparatus must be carried out by

a qualified person.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 33

ENGLISH

Wiring of main power supply and equipment

capacity

- Use a separate power supply for the Outdoor Unit and Indoor Unit.

- Bear in mind ambient conditions (ambient temperature,direct

sunlight, rain water,etc.) when proceeding with the wiring and

connections.

- The cable size is the minimum value for metal conduit wiring. The

power cord size should be 1 rank thicker taking into account the line

voltage drops. Make sure the power-supply voltage does not drop

more than 10 %.

- Specific wiring requirements should adhere to the wiring regulations

of the region.

- Power supply cords of parts of appliances for outdoor use should not

be lighter than polychloroprene sheathed flexible cord.

- Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

WARNING

• Follow ordinance of your governmental organization for

technical standard related to electrical equipment, wiring

regulations and guidance of each electric power company.

• Make sure to use specified cables for connections so that no

external force is imparted to terminal connections. If

connections are not fixed firmly, it may cause heating or fire.

• Make sure to use the appropriate type of overcurrent protection

switch. Note that generated overcurrent may include some

amount of direct current.

Field Wiring

208/230 V

Example Connection of Communication Cable

1 Outdoor Unit-3 Ø, 208/230 V

Switch

ELCB

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

ELCB

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 208/230 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

HR unit

L(L1) N(L2)

R(L1)

S(L2) T(L3)

2 Outdoor Units-3 Ø, 208/230 V

When the power source is connected In series between the units.

When the power source is supplied to Each outdoor unit individually.

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

(Main Switch)

[Slave]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

nication L

es Cable

Com

Power

(2 Wires

(2 Wires C

r Line

(2 Wires Cab

[

Master]

[Sla

Power L

Wire

Power supply

3 Phase 3 Wires

60 Hz 208/230 V

Power supply

1 Phase 60 Hz

208/230 V

RST

Switch

ELCB

L(L1) N(L2)

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 208/230 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

[Slave]

Switch

ELCBELCB

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

Power Line

(2 Wires Cable)

HR unit

ELCB

L(L1) N(L2)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

HR unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Between Indoor and Master Outdoor unit

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, Communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit

locally. Running the product in reversed phase may break the

compressor and other parts.

• When using shielded wires, perform a single-point grounding only

to the outdoor unit for grounding of communication wires.

• Some installation site may require attachment of an earth leakage

breaker. If no earth leakage breaker is installed, it may cause an

electric shock.

• Do not use anything other than breaker and fuse with correct

capacity. Using fuse and wire or copper wire with too large capacity

may cause a malfunction of unit or fire.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 34

ENGLISH

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Slave

Outdoor Unit

HR unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Between Indoor and Master Outdoor unit

• It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units

are matched.(A-A,B-B)

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, Communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit

locally. Running the product in reversed phase may break the

compressor and other parts.

3 Outdoor Units-3 Ø, 208/230 V

When the power source is connected In series between the units.

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

(Main Switch)

[Slave1] [Slave2]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Communic

(3 W

(2 Wire

Cable)

Power

(2 Wires

[

Master

]

[Slav

Power Line

2 Wires Ca

)

Switch

ELCB

Power supply

3 Phase 3 Wires

60 Hz 208/230 V

Power supply

1 Phase 60 Hz

208/230 V

L(L1) N(L2)

R(L1)

S(L2) T(L3)

NOTE

- Field wiring diagram is to be used as a guidelineonly. Wiring

should comply with applicable local and national codes

- ELCB must have function to prevent electrical short and over

current at the same time.

- Use copper wires only.

- Unit must be grounded in compliance with the applicable local

and national codes.

- ELCB and fuse/breaker must install to the power line

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 208/230 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

[Slave1] [Slave2]

Switch Switch

ELCB ELCB ELCB

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

Power Line

(2 Wires Cable)

HR unit

ELCB

L(L1) N(L2)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

When the power source is supplied to Each outdoor unit individually.

NOTE

- Field wiring diagram is to be used as a guidelineonly. Wiring

should comply with applicable local and national codes

- ELCB must have function to prevent electrical short and over

current at the same time.

- Use copper wires only.

- Unit must be grounded in compliance with the applicable local

and national codes.

- ELCB and fuse/breaker must install to the power line

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Slave1

Outdoor Unit

HR unit

Slave2

Outdoor Unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

Between Indoor and Master Outdoor unit

• It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units

are matched.(A-A,B-B)

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit

locally. Running the product in reversed phase may break the

compressor and other parts.

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 35

ENGLISH

Between Indoor and Master Outdoor unit

460 V / 575 V

Example Connection of Communication Cable

1 Outdoor Unit-3 Ø, 460 V / 575 V

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, Communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit

locally. Running the product in reversed phase may break the

compressor and other parts.

Switch

ELCB

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

ELCB

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Outdoor Unit]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 460 V / 575 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

HR unit

L(L1) N(L2)

R(L1)

S(L2) T(L3)

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

HR unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

2 Outdoor Units-3 Ø, 460 V / 575 V

When the power source is connected In series between the units.

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 460 V / 575 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

[Slave]

Switch

ELCBELCB

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

Power Line

(2 Wires Cable)

HR unit

ELCB

L(L1) N(L2)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

(Main Switch)

[Slave]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

HR unit

Power supply

3 Phase 3 Wires

60 Hz 460 V / 575 V

Power supply

1 Phase 60 Hz

208/230 V

Switch

ELCB

L(L1) N(L2)

R(L1)

S(L2) T(L3)

When the power source is supplied to Each outdoor unit individually.

NOTE

- Field wiring diagram is to be used as a guideline only. Wiring

should comply with applicable local and national codes

- ELCB must have function to prevent electrical short and over

current at the same time.

- Use copper wires only.

- Unit must be grounded in compliance with the applicable local

and national codes.

- ELCB and fuse/breaker must install to the power line

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Slave

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

HR unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

Between Indoor and Master Outdoor unit

• It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units

are matched.(A-A,B-B)

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, Communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the product

is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor

and other parts.

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 36

ENGLISH

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Master

Outdoor Unit

SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V

Slave1

Outdoor Unit

HR unit

Slave2

Outdoor Unit

3(A) 4(B) 3(A) 4(B) 3(A) 4(B) 3(A) 4(B)

Between Indoor and Master Outdoor unit

• It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units

are matched.(A-A,B-B)

WARNING

• Indoor unit ground lines are required for preventing electrical shock

accident during current leakage, Communication disorder by noise

effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect

each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an

integrated manner because this system consists of the equipment

utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase,

momentary blackout or the power goes on and off while the product

is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor

and other parts.

3 Outdoor Units-3 Ø, 460 V / 575 V

When the power source is connected In series between the units.

Switch

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

Power supply

3 Phase 3 Wires

60 Hz 460 V / 575 V

Power supply

1 Phase 60 Hz

208/230 V

(Main Switch)

[Slave1] [Slave2]

Switch Switch

ELCB ELCB ELCB

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

Power Line

(2 Wires Cable)

HR unit

ELCB

L(L1) N(L2)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

R(L1)

S(L2) T(L3)

Communication Line

(2 Wires Cable)

Power Line

(3 Wires Cable)

Communication Line

(3 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

Power Line

(2 Wires Cable)

[Master]

[Indoor Units]

(Main Switch)

[Slave1] [Slave2]

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

Pull Box

(Installer option)

HR unit

Switch

ELCB

Power supply

3 Phase 3 Wires

60 Hz 460 V / 575 V

Power supply

1 Phase 60 Hz

208/230 V

L(L1) N(L2)

R(L1)

S(L2) T(L3)

When the power source is supplied to Each outdoor unit individually.

NOTE

- Field wiring diagram is to be used as a guideline only. Wiring

should comply with applicable local and national codes

- ELCB must have function to prevent electrical short and over

current at the same time.

- Use copper wires only.

- Unit must be grounded in compliance with the applicable local

and national codes.

- ELCB and fuse/breaker must install to the power line

Example) Connection of transmission wire

[BUS type]

- Connection of communication cable must be installed like below

figure between indoor unit to outdoor unit.

HR unit

[STAR type]

- Abnormal operation can be caused by communication defect, when

connection of communication cable is installed like below figure.

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 37

ENGLISH

Example) Connection of power and communication cable (UXA)

Gap : Over

50 mm(1.97’’)

When connecting

Main power lines

/ Ground wire from left side

When connecting

Communication wires

/ Ground wire from left side

Main power

terminal block

Ground wire

Main power

terminal block

Insulation sleeves

attachments

Ground wire

ODU-IDU

Communication

cable

ODU-ODU

Communication

cable

Bottom Side

Main power

terminal block

Ground wire

When connecting

Communication wires

/ Ground wire from

front guide panel

When connecting

Main power lines

/ Ground wire from

front guide panel

Gap : Over

50 mm(1.97’’)

Front Side

Fix firmly with cable tie or

clamp cord not to be displaced

Main power line

connection

Communication/Ground

wire connection

Example) Connection of power and communication cable (UXB)

Main power

terminal block

Ground wire

Gap : Over

50 mm(1.97’’)

When connecting

Main power lines

/ Ground wire from left side

When connecting

Communication wires

/ Ground wire from left side

Bottom Side

Checking the setting of outdoor units

Checking according to DIP switch setting

- You can check the setting values of the Master outdoor unit from the

7 segment LED.

The DIP switch setting should be changed when the power is OFF.

Checking the initial display

The number is sequentially appeared at the 7 segment in 5 seconds

after applying the power. This number represents the setting condition.

[Main Board]

ARUM***B(D)TE5

DIP switch

7 segment

SW01C (Automatic

Addressing Setting)

Main power

terminal block

Insulation sleeves

attachments

Ground wire

ODU-IDU

Communication

cable

ODU-ODU

Communication

cable

Ground wire

Main power

terminal block

Ground wire

When connecting

Communication wires

/ Ground wire from

front guide panel

When connecting

Main power lines

/ Ground wire from

front guide panel

Gap : Over

50 mm(1.97’’)

Front Side

Fix firmly with cable tie

or clamp cord not to be

displaced

Main power line

connection

Communication/Ground

wire connection

It should be wiring power cables or communication cables to avoid

interference with the oil level sensor. Otherwise, That oil level sensor

would be operated abnormally.

CAUTION

It should be wiring power cables or communication cables to avoid

interference with the oil level sensor. Otherwise, That oil level sensor

would be operated abnormally.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 38

ENGLISH

ARUM***CTE5

DIP switch

7 Segment

SW01C

(Automatic Addressing Setting)

Quick control Setting

In the factory setting, main PCB DIP switch setting is all “OFF”.

- Check and make sure that all the indoor unit model name are

ARNU******4.

- Change the main PCB DIP switch No. 3 “OFF ’ ON” like below

picture.

- Push the reset button.

ARUM***B(D)TE5

7 segmentDIP Switch

Reset button

DIP switch

7-Segment

Reset button

• Initial display order

• Example) ARUM480BTE5

48 HP 208/230 V Heat Recovery system

(Master unit: 22 HP, Slave 1: 14 HP, Slave 2: 12 HP)

Order HP(Ton) Mean

①

8(6)~24(20) Master unit capacity

②

26(22)~44(36) Slave 1 unit capacity

③

46(38)~52(42) Slave 2 unit capacity

④

8(6)~52(42) Total capacity

⑤

3 Heat Recovery (Factory Setting)

⑥

46 460 V model

57 575 V model

22 208/230 V model

⑦

30 Full function

① ② ③ ④ ⑤ ⑥ ⑦

22 14 12 48 3 22 1

HP 8 10 12 14 18 20 22 24

TON 6 8 10 12 14 16 18 20

• Master Unit

h Heat Pump installation

① Turn on the DIP s/w No 4.

② The factory setting display is appeared “HR”.

③ Change “HR” into “HP” display pushing ▶ button and then push

confirm button.

④ Turn off the DIP s/w No 4. and Push reset button to restart the

system. (If you turn on the DIP s/w No 4, you can make sure “HR”

or “HP” display later.)

• Slave Unit

DIP switch

setting

ODU Setting

Slave 1

Slave 2

DIP switch

setting

ODU Setting

Heat Recovery

System (Factory

Setting)

DIP switch

setting

ODU Setting

Setting Heat pump

system or Heat Recovery

system (Installer Setting)

ARUM***CTE5

1,MFL68980308,영영 2018. 11. 13. 영영 3:23 Page 39

ENGLISH

Switch for setup of HR Unit

2 Series

Main function of SW02M

1 Selection of the method for addressing valves of an HR unit

(Auto/Manual)

2 Setting the zoning control

SW02M

S/W

Selection

No.1

Method for addressing valves of an

HR unit (Auto/Manual)

No.2 Model of HR unit

No.3 Model of HR unit

No.4 Model of HR unit

No.5 Valve group setting

No.6 Valve group setting

No.7

Use only in factory

production (preset to

“OFF”)

Zoning

setting

(“ON”)

No.8

Use only in factory

production (preset to

“OFF”)

Auto Manual

Switch No.1 OnSwitch No.1 Off

DIP Switch setting

Normal

control

Zoning

control

SW01M

Turn the DIP switch of

the zoning branch on.

Ex) Branch 1,2 are

zoning control.

* Number from left in sequence for less-than-8 branch model.

** PRHR043A / PRHR033A / PRHR023A : Master Only

* Zoning control

This function is used to connect multiple indoor units to one pipe.

SW02M

(DIP switch for setup of

The function of HR unit)

SW03M

SW04M

SW01M/SW03M/SW04M

(Switch for manual valve

addressing)

SW01M

SW05M

#1 valve housing

#4 valve housing

7-SEG

Setting For Heat Recovery Unit (Refer Only Heat

Recovery Installation)

[Heat Recovery (HR) Unit Board]

2 Series

Branch #1~4

Bypass

(from left)

SC EEV

ڸڹںڻڼڽھڿ

Branch #3,4

High/Low

(from top)

Branch #1,2

High/Low

(from top)

Branch #5~8

Bypass

(from left)

Branch #7,8

High/Low

(from top)

Branch #5,6

High/Low

(from top)

7-SEG

Main PCB (2EA, same P/No)

7-SEG

Liquid

Bypass

Valve

- SW02E : Use only SW

No.5

- SW01E : Branch #5~8

(from SW No.1)

- SW01C

- SW01D/SW01C/

SW02B/SW01B/SW02E

- SW01E : Branch #1~4 (from

SW No.1)

Branch No.

3 Series

Main PCB (Master) Main PCB (Slave)

SW Function

DIP

SW02E

(8pin

DIP SW)

Selection of the method for

pipe detection

Selection of Master/Slave

Main PCB

Setting the Zoning Control

Selection of the No. of

connected branches

SW01E

(4pin

DIP SW)

Selection of the valve to

address

Rotary

SW01D

(Left)

Selection of the Valve

Group Control

SW01C

(Right)

Manual addressing of

zoning indoor units

Setting to address HR units

Push

SW02B

(Left)

Increase in the digit of 10

SW01B

(Right)

Increase in the digit of 1

3 Series

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 40

ENGLISH

Main function of SW02E

ON S/W Selection

No.1 Method for pipe detection of an HR Unit (Auto/Manual)

No.2

No. of connected branchesNo.3

No.4

No.5 Master/Slave (Main PCB) Setting

No.6 EEPROM factory initialization (4,5,6)

No.7

Use only in factory production

(preset to "OFF")

Zoning setting ("ON")

No.8

Use only in factory production

(preset to "OFF")

3 Selection of the model of HR unit

2 Series

3 Series

* Each model is shipped with the switches No.2 and No.3 pre-adjusted

as above in the factory.

(For 2 branches)

PRHR022A

(For 3 branches)

PRHR032A

(For 4 branches)

PRHR042A

Initial

Setting

1 branches

Connected

2 branches

Connected

3 branches

Connected

4 branches

Connected

PRHR023A

PRHR033A

PRHR043A

1 branch

Connected

2 branch

Connected

3 branch

Connected

4 branch

Connected

5 branch

Connected

6 branch

Connected

7 branch

Connected

8 branch

Connected

PRHR063A

PRHR083A

1 branch

Connected

2 branch

Connected

3 branch

Connected

4 branch

Connected

5 branch

Connected

6 branch

Connected

7 branch

Connected

8 branch

Connected

WARNING

• If you want to use a PRHR032A for 2 branches HR unit after

closing the 3rd pipes, set the DIP switch for 2 branches HR unit.

• If you want to use a PRHR042A for 3 branches HR unit after

closing the 4th pipes, set the DIP switch for 3 branches HR unit.

• If you want to use a PRHR042A for 2 branches HR unit after

closing the 3rd and 4th pipes, set the DIP switch for 2 branches

HR unit.

• The unused port must be closed with a copper cap, not with a

plastic cap.

WARNING

If you want to use a “Model” for “No. of using branch(es)” HR

Unit after closing the “Closing pipe No.”, set the DIP switch for

“No. of using branch(es)” HR Unit.

Ex) If you want to use a PRHR083A for 4 branches HR Unit after

closing the 5~8th pipes, set the DIP switch for 4 branches HR

Unit.

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 41

ENGLISH

4 Setting the Valve Group.

2 Series

NOTE

If the large capacity indoor units are installed, below Y branch pipe

should be used.

Y branch pipe

(Unit: mm [inch])

SW05M (Rotary S/W for addressing HR unit)

Must be set to '0' when installing only one HR unit.

When installing multiple HR units, address the HR units with

sequentially increasing numbers starting from '0'.

Ex) Installation of 3 HR units

AB AB AB

S/W No. Setup

No.1 Manual addressing of valve #1

No.2 Manual addressing of valve #2

No.3 Manual addressing of valve #3

No.4 Manual addressing of valve #4

SW03M

Increase in the digit of 10 of valve

address

SW04M

Increase in the last digit of valve

address

SW01M

SW03M

SW04M

2 Zoning setting

- Set the address of the valve of the HR unit to the central control

address of the connected indoor unit.

- SW01M : selection of the valve to address

SW03M : increase in the digit of 10 of valve address

SW04M : increase in the last digit of valve address

SW05M :Rotary S/W

- Prerequisite for manual valve addressing : central control address

of each indoor unit must be preset

differently at its wired remote control.

S/W No. Setup

No.1 Manual addressing of valve #1

No.2 Manual addressing of valve #2

No.3 Manual addressing of valve #3

No.4 Manual addressing of valve #4

SW03M

Increase in the digit of 10 of valve

address

SW04M Increase in the last digit of valve address

SW05M Manual addressing of zoning indoor units

SW01M

SW03M

SW04M

SW05M

SW01M/SW03M/SW04M (DIP S/W and tact S/W for

manual valve addressing)

1 Normal setting (Non-Zoning setting)

- Set the address of the valve of the HR unit to the central control

address of the connected indoor unit.

- SW01M: selection of the valve to address

SW03M: increase in the digit of 10 of valve address

SW04M: increase in the last digit of valve address

- Prerequisite for manual valve addressing : central control address

of each indoor unit must be preset differently at its wired remote

control.

Models Low pressure Gas pipe Liquid pipe

ARBLN

03321

O.D19.05

I.D 22.2

O.D19.05

I.D25.4

I.D28.58

I.D19.05

I.D22.2

I.D15.88

I.D19.05

I.D12.7

I.D15.88

I.D19.05

I.D25.4

O.D19.05

I.D9.52

I.D12.7

I.D9.52

I.D6.35

I.D12.7

I.D9.52

I.D12.7

I.D6.35

* Setting the Valve Group

This function is used to connect one indoor unit to two pipes. (Large

capacity indoor unit over 56 kBtu must be connected to two pipes.)

DIP S/W setting Example

Not control

Indoor Unit

No.1, 2 Valve

Control

Indoor Unit

Large capacity indoor unit

No.2, 3 Valve

Control

Indoor Unit

Large capacity indoor unit

No.3, 4 Valve

Control

Large capacity indoor unit

Indoor Unit

No.1, 2 Valve

No.3, 4 Valve

Control

Large capacity indoor unit

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 42

ENGLISH

3 Series

Main function of SW01D

- Selection of the Valve Group Control

NOTE

Use the Valve Group Control when 2 branches are connected with

only 1 indoor unit which has higher capacity than 61 kBtu.

NOTE

If the large capacity indoor units are installed, below Y branch pipe

should be used.

Valve Group

SW01D

Setting

Valve Group

SW01D

Setting

Not control 0 No. 5,6/7,8 Valve Control 8

No. 1,2 Valve Control 1 No. 1,2/5,6 Valve Control 9

No. 2,3 Valve Control 2 No. 1,2/7,8 Valve Control A

No. 3,4 Valve Control 3 No. 3,4/5,6 Valve Control B

No. 5,6 Valve Control 4 No. 3,4/7,8 Valve Control C

No. 6,7 Valve Control 5

No. 1,2/3,4/5,6 Valve

Control

No. 7,8 Valve Control 6

No. 1,2/3,4/6,7 Valve

Control

No. 1,2/3,4 Valve

Control

No. 1,2/3,4/7,8 Valve

Control

* Master Only

Models Low Pressure Gas Pipe Liquid pipe

ARBLB03321

413(16-1/4)

390(15-11/32)

I.D19.05(3/4)

I.D12.7(1/2)

I.D12.7

(1/2)

70(2-3/4)

I.D15.88(5/8)

I.D25.4(1)

O.D25.4(1)

80(3-5/32)

110(4-11/32)

(3-9/32)

O.D19.05(3/4)

I.D22.2(7/8)

I.D28.58(1-1/8)

I.D12.7(1/2)

(2-29/32)

332(13-1/16)

321(12-5/8)

I.D6.35(1/4)

I.D6.35

(1/4)

I.D9.52(3/8)

Models High Pressure Gas Pipe

ARBLB03321

I.D15.88(5/8)

I.D12.7(1/2)

70(2-3/4)

I.D25.4(1)

110(4-11/32)

I.D19.05(3/4)

3 2

O.D15.88(5/8)

444(17-15/32)

421(16-9/16)

(3-25/32)

I.D15.88

(5/8)

I.D22.2(7/8)

O.D15.88(5/8)

I.D19.05(3/4)

I.D9.52(3/8)

h Y branch pipe

[Unit : mm(inch)]

SW01C (Rotary S/W for addressing HR unit)

Must be set to '0' when installing only one HR unit.

When installing multiple HR units, address the HR units with

sequentially increasing numbers starting from '0'.

Maximum 16 HR Units can be installed.

Ex) Installation of 3 HR units

SW01B/SW01C/SW01E/SW02B

(DIP S/W and push S/W for Manual pipe detection)

- Set the address of the valve of the HR unit to the central control

address of the connected indoor unit.

- SW01E: selection of the valve to address

SW02B: increase in the digit of 10 of valve address

SW01B: increase in the last digit of valve address

SW01C: Manual addressing of zoning indoor units

(use for Zoning setting)

- Prerequisite for Manual pipe detection : central control address of

each indoor unit must be preset differently at its wired remote

control.

AB AB AB

* Master Only

SW01E

S/W No. Setup

No.1

Manual addressing of valve #1

(Master) / #5 (Slave)

No.2

Manual addressing of valve #2

(Master) / #6 (Slave)

No.3

Manual addressing of valve #3

(Master) / #7 (Slave)

No.4

Manual addressing of valve #4

(Master) / #8 (Slave)

SW02B

Increase in the digit of 10 of valve

address

SW01B

Increase in the last digit of valve

address

SW01B

SW01C

Manual addressing of zoning indoor

units

* Use for Zoning setting

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 43

ENGLISH

SW01E

SW #1 On : Select Valve #1

Master

OFF

SW02B SW01B

Input the central control

address of Indoor unit

Master

SW01E

SW #1 Off : Finish Valve #1

Master

OFF

SW01E

SW #2 On : Select Valve #6

Slave

OFF

SW02B SW01B

Input the central control

address of Indoor unit

Slave

SW01E

SW #2 Off : Finish Valve #6

Slave

OFF

1 Normal setting (Non-Zoning setting)

ex) Manual pipe detection of Valve #1, 6.

2 Zoning setting

SW01E

SW #1 On : Select Valve #5

Slave

OFF

SW02B SW01B

SW01C

After selecting No.1 zoning

indoor unit, input the central

control address of indoor unit.

Slave

After selecting No.2 zoning

indoor unit, input the central

control address of indoor unit.

Setting SW01C to ‘0’After selecting No.3 zoning

indoor unit, input the central

control address of indoor unit.

SW01E

SW #1 Off : Finish Valve #5

Slave

OFF

SW01E

SW #2 On : Select Valve #6

Slave

OFF

SW02B SW01B

Input the central control

address of Indoor unit

Slave

SW01E

SW #2 Off : Finish Valve #6

Slave

OFF

SW02B

SW01C

SW01B

Slave

SW01C

Slave

SW02B

SW01C

SW01B

Slave

ex) Manual pipe detection of Valve #5 with three zoning indoor units,

#6 without zoning unit.

NOTE

Use the Zoning Control when install two or more indoor units at 1

branch of HR Unit.

The indoor units controlled by Zoning Control can be selected

collectively as the cooling / heating mode.

DIP switch

7 segment

SW01C

(Automatic Addressing Setting)

Automatic Addressing

The address of indoor units would be set by Automatic

Addressing

- Wait for 3 minutes after supplying power.

(Master and Slave outdoor units, indoor units)

- Press RED button of the outdoor units for 5 seconds. (SW01C)

- A “88” is indicated on 7-segment LED of the outdoor unit PCB.

- For completing addressing, 2~7 minutes are required depending on

numbers of connected indoor units

Numbers of connected indoor units whose addressing is completed are

indicated for 30 seconds on 7-segment LED of the outdoor unit PCB

- After completing addressing, address of each indoor unit is indicated

on the wired remote control display window. (CH01, CH02,

CH03, ……, CH06 : Indicated as numbers of connected indoor units)

[Main Board]

ARUM***B(D)TE5

ARUM***CTE5

DIP switch

7 Segmen

SW01C

(Automatic Addressing Setting)

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 44

ENGLISH

The Procedure of Automatic Addressing

• Automatic addressing process end

Numbers of indoor unit connected are indicated for 30

seconds on 7-segment LED after completing process.

Indoor address number is displayed on wired remote controller or

indoor unit display window. It is not an error message, will

disappeared when on/off button is pressed on remote controller

ex) Display of 01, 02, ..., 15 means connection of 15 indoor units

and Automatic addressing is completed normally.

Automatic addressing process start

Waiting 3 minutes

Power On

Press RED Button for

5 seconds (SW01C)

7-segment LED = 88

Don’t press RED Button

(SW01C)

Waiting about 2~7 minutes

7-segment LED

YES

NO Check the connections

of communication cable

= 88

Setting For Heat Recovery Unit (Refer Only Heat Recovery Installation)

Automatic pipe detection

1 Turn No.1 of DIP s/w SW02M of HR unit PCB off.

2 Confirm that the setting of No.2, 3 of SW02M corresponds with the

type of the valve connection.

3 Reset the power of HR unit PCB

4 Master Out door unit PCB DIP switch on : No.5

5 Select the mode using ‘▶’, ‘◀’ Button : “Idu” Push the ‘●’ button

6 Select the “Id 5” function using ‘▶’, ‘◀’ Button :“Ath” or “”Atc”

Push the ‘●’ button.

Outdoor temperature is over 15 °C(59 °F) : “Atc” Using (If it fail, use

“Ath”)

Outdoor temperature is below 15 °C(59 °F) : “Ath” Using (If it fail,

use “Atc”)

7 Select the mode using ‘▶’, ‘◀’ Button : “Idu” Push the ‘●’ button

8 Select the “Id 6” function using ‘▶’, ‘◀’ Button :“StA” Push the

‘●’ button

9 System is operated after ”88” is displayed on 7 segment of the

outdoor unit main PCB.

10 Pipe detection process is proceeded.

11 5~30 minutes are required depending on the number of the indoor

units and outdoor temperature.

12 The number of the indoor units connected is displayed on 7

segment of the outdoor unit main PCB for about 1 minute

- For a HR unit, the number of the indoor units connected to each

HR unit is displayed.

- '200' is displayed in case of auto pipe detecting error, and Auto

pipe detection process is completed after '88' is disappeared.

* Auto pipe detection function : the function that sets connection

relationship automatically between the indoor unit and HR unit.

WARNING

•

Execute auto addressing and auto pipe detection again whenever

the indoor PCB and HR unit PCB is replaced.

- Operation error occurs unless power is supplied to the indoor

and HR units.

•

Error No.200 occurs if the number of connected indoor units and

that of scanned indoor units are different.

• If

auto pipe detection process fails, complete it with manual pipe

detection (see Manual pipe detection part).

• If

auto pipe detection process is completed normally, manual

pipe detection is not required.

•

If you want to do auto pipe detection again after auto pipe

detection fails, do after reset of outdoor unit by all means.

•

During 5 minutes after pipe detection is completed, do not turn

off the main unit PCB to save the result of pipe detection

automatically.

CAUTION

• In replacement of the indoor unit PCB, always perform Automatic

addressing setting again (At that time, please check about using

Independent power module to any indoor unit.)

• If power supply is not applied to the indoor unit, operation error

occur.

• Automatic Addressing has to be performed after more than 3

minutes to improve indoor unit communition when initial power is

supplied.

• Please be sure that all the DIP switch (1~7) of master outdoor unit is

OFF before Automatic Addressing setting

Manual pipe detection

1 Enter the central control address into each indoor unit using its

wired remote controller.

2 Turn No.1 of DIP s/w SW02M of HR unit PCB on.

3 Reset the power of HR unit PCB.

4 On the HR unit PCB, manually set address of each valve of the HR

unit to the central control address of the indoor unit connected to

the valve.

5 Reset the power of outdoor unit PCB.

6 The number of the indoor unit installed is displayed after about 5

minutes.

Ex) HR ‡ The number of the indoor

7 Reset the power of outdoor unit PCB, HR unit.

8 Manual pipe detection is completed

WARNING

•

In case that central controller is not installed, firstly set up central

controller’s setting to make address setting of indoor units.

•

In case that central controller is installed, please set central

control address in wired remote control of indoor unit.

• Do not set central control address of indoor unit to ‘0xFF’. (If the

address is ‘0xFF’, pipe detection will not be completed properly.)

•

HR units’s manual pipe address is set by the central control

address of indoor units.

•

Address of valve which is not connected with indoor unit should

be set differently with the address of a valve which is indoor unit

connected. (If address is overlapped, valve will not work

properly)

•

If there occurs some error during pipe detection process, it

means pipe detection process is not properly finished.

•

If an error occurred, it means that manual pipe setting is not

completed.

•

During 5 minutes after pipe detection process is completed, do

not turn off the main outdoor unit’s PCB to save the result of

pipe detection automatically.

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 45

ENGLISH

Reset the power of HR unit PCB

Conﬁrm that the setting of No.2, 3 of

SW02M corresponds with the valve

connection type

88' is displayed on 7-SEG of the outdoor

unit main PCB

Outdoor unit is operated for 5~60 minutes

The number of indoor units detected is

displayed for 30 seconds on the outdoor

unit PCB after outdoor unit stopped

Display error on outdoor unit PCB

Display error on HR unit PCB

Outdoor unit PCB : HR ơ HR unit

number ơ Valve number

HR unit : '200'

Check the HR unit and indoor unit

Does the setting

status satisfy indoor unit’s

conﬁguration properly

during operation?

Conﬁrm indoor unit’s address setting

Turn No.1 of DIP s/w SW02M of HR unit PCB off.

YES

Master Outdoor unit’s PCB DIP switch on : No.5

Select the mode using ‘ȯ’, ‘ȭ’ Button :

“Idu” Push the ‘Ɨ’ button

Select the mode using ‘ȯ’, ‘ȭ’ Button :

“Idu” Push the ‘Ɨ’ button

Select the “Id 6” function using ‘ȯ’, ‘ȭ’

Button :“StA” Push the ‘Ɨ’ button

Select the “Id 5” function using ‘ȯ’, ‘ȭ’

Button :“Ath” or ”Atc” Push the ‘Ɨ’ button.

Outdoor temperature is over 15 °C(59 °F) :

Select “Atc” (if fails, use “Ath”)

Outdoor temperature is below 15 °C(59 °F)

: Select “Ath” (if fails, use “Atc”)

* It is possible to be generated mode

changing noise of heating and cooling

which is normal.

There is no mode changing noise at normal

operation.

Completion of auto pipe detection Process

Is the number

of indoor units connected and

displayed one equal?

Pipe detection error occurs for 30

seconds.

Check the installation status of

outdoor, indoor, HR unit

Incompletion of auto detection Process

Retry auto pipe detection Process

after ﬁxing wrong installation

YES

Flow chart of auto pipe detection Process

ARUM***B(D)TE5

ARUM***CTE5

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW01D (reset)

SW03C (ȯ: forward)

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW01D (reset)

SW03C (ȯ: forward)

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 46

ENGLISH

Completion of manual pipe detection Process

Reset the power of HR unit PCB.

Input the central control address at

each indoor unit using wired remote

controller.

Set the address of each valve manually

by referring indoor unit’s central control

address connected with.

Reset the power of outdoor unit PCB.

Wait for about 5 minutes.

The number of the indoor units connected

is displayed.

Ex)HR 

The number of connected indoor units

Check the central control address of

indoor and HR unit.

Make sure that reset the outdoor

unit’s

power after setting central control

address of indoor units.

Is the number

of indoor units connected with the

outdoor unit and displayed number

equal?

Execute in case of Auto pipe detection

failure

Turn No.1 of SW02M of HR unit PCB on.

YES

- Above setup must be done for all HR unit valves.

- The valve that is not connected with any indoor unit should be

addressed with any other number than used address numbers of the

valves connected with indoor units.

(The valves does not work if the address numbers are same.)

No. Display and setup Setup and Contents

- Operation: None

- Display: None

- Operation: Turn DIP S/W No.1 on to

address valve #1

- Display: Existing value saved in

EEPROM is displayed in 7-SEG.

- Operation: Set the digit of 10 to the

number in Group High data of the wired

remote control connected to the

corresponding indoor unit to the valve

#1 by pressing left tack S/W.

- Display: Digit increasing with the times

of pressing tack S/W is displayed in left

7-SEG

- Operation: Set the digit of 1 to the

number in Group Low data of the wired

remote control connected to the

corresponding indoor unit to the valve

#1 by pressing right tack S/W.

- Display: Digit increasing with the times

of pressing tack S/W is displayed in

right 7-SEG

- Operation: Turn DIP S/W No.1 off to

save the address of valve #1

- Display: "11" displayed in 7-SEG

disappears

7-SEG SW01M SW03M SW04M

Example of manual valve addressing (Non-

Zoning setting)

(In case that an indoor unit of central control address "11" is connected

to a valve #1 of an HR unit)

- Prerequisite for manual valve addressing: central control address of

each indoor unit must be preset differently at its wired remote

control.

Flow chart of manual addressing for pipe

detection

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 47

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- Above setup must be done for all HR unit valves.

- The valve that is not connected with any indoor unit should be

addressed with any other number than used address numbers of the

valves connected with indoor units.

(The valves does not work if the address numbers are same.)

No. Display and setup Setup and Contents

- Operation: None

- Display: None

- Operation : Turn DIP S/W No.1 on to

address valve #1

- Display : Existing value saved in

EEPROM is displayed in 7-SEG.

- Operation : Set the digit of 10(1) to the

number in Group High data of the wired

remote control connected to the

corresponding indoor unit to the valve

#1 by pressing left tack S/W.

- Display : Digit increasing with the times

of pressing tack S/W is displayed in left

7-SEG.

- Operation : SW05M : 1

- Display : Display former value.

- Operation : Setting No. using SW03M

and SW04M, SW05M : 1

- Display : Display setting value.

- Operation : Turn DIP S/W No.1 off to

save the address of valve #1

- Display : "11" displayed in 7-SEG

disappears.

- Operation : Return valve of addressing

HR unit.

- Display : None

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

No. Display and setup Setup and Contents

- Operation: Turn DIP S/W No.1 on.

- Display: "11" is displayed in 7-SEG

- Operation: Turn DIP S/W No.1 off

- 7-SEG disappeared

7-SEG SW01M

No. Display and setup Setup and Contents

- Operation: more than 2 DIP switches

turned on.

- Display: "Er" is displayed in 7-SEG

7-SEG SW01M

ROTARY 01 ROTARY 02

The connected port number of HR

unit

The connected HR unit number

The auto addressing number of indoor

unit (digit of 1)

The auto addressing number of indoor

unit (digit of 10)

No. of Indoor unit.

No. of HR unit branch.

No. of HR unit.

ROTARY 01 ROTARY 02

7 segment

Setting method of Master indoor unit in zoning

1 Turn DIP switch 5,6,10 on at system off.

2 Set the left Rotary switch for HR unit.(Rotary switch No. "0" ‘ HR unit

No. "1")

3 Set the right Rotary switch for IDU unit.(Rotary switch No. "0" ‘ HR

unit branch No. "1")

4 Display the Master IDU No. of the HR unit on 7segment.(Default

display is "00" on 7segment)

5 Press the black button.(The IDU No. increase every 1 second in the

zoning )

6 Set the Master IDU.(Press the red button during 1.5 seconds stop

twinkling)

Method of checking the pipe detection result

at outdoor unit

1 Wait for 5 minutes, after Pipe detection is completed.

2 Turn on the No.10,14,16 DIP S/W of SUB PCB at master unit

3 Check the data on 7- segment, switching rotary 01,02.

Identiﬁcation of Manual Valve ID (Address)

Method of checking the pipe detection result

at HR unit

In case that an indoor unit of central control address "11" is connected

to a valve #1 of an HR unit

Example of manual valve addressing (Zoning

setting)

(In case that an indoor unit of central control address "11" is connected

to a valve #1 of an HR unit)

Zoning control is connecting 2 or more indoor units at one pipe of HR

unit. In case of Zoning control, in order to set controls with multiple

indoor units connection uses the rotary switch. Namely, only the rotary

switch changes from same valve set condition and set indoor units

connection.

1 On DIP switch of the corresponding valves and sets the rotary

switch at 0.

2 Setting the number with tact switch.

3 In case of addition of indoor units to same port, increases 1 with the

rotary switch and sets number with tact switch.

4 In case of checking the number which the corresponding valve is

stored, turn on DIP switch and set the number of rotary switch.

5 Indoor units set available 7 per a port(rotary switch 0~6), in case of

setting above of 7 with rotary switch, it will display error.

6 Setting the rotary switch on original condition(HR unit number set

conditions) after all finishing a piping setting.

7 The rotary switch set value of above number of indoor units which

is connected with FF and prevents a malfunction.

(Example: The case where 3 indoor units is connected in piping 1,

sets from rotary switch 0,1,2 and 3,4,5 with FF set)

- Prerequisite for manual valve addressing: central control address of

each indoor unit must be preset differently at its wired remote

control.

• Waiting for 80 seconds after power on.

• The zoning information and Master IDU information remove from

EEPROM after Auto-addressing.

• If there is installed the central control, it is impossible setting of

Master IDU in zoning.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 48

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Outdoor Units (External PCB)

Group Number setting

Group Number setting for Indoor Units

- Confirm the power of whole system(Indoor Unit, Outdoor Unit) is

OFF, otherwise turn off.

- The communication cables connected to CEN.A and CEN.B terminal

should be connected to central control of Outdoor Unit with care for

their polarity (A-A, B-B ).

- Turn the whole system on.

- Set the group and Indoor Unit number with a wired remote control.

- To control several sets of Indoor Units into a group, set the group ID

from 0 to F for this purpose.

Example) Group number setting

number indicate the group number

2nd number point out indoor unit number

SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V

B(D) A(C)

1 F

Group Indoor unit

Group recognizing the central controller

No.0 group (00~0F)

No.1 group (10~1F)

No.2 group (20~2F)

No.3 group (30~3F)

No.4 group (40~4F)

No.5 group (50~5F)

No.6 group (60~6F)

No.7 group (70~7F)

No.8 group (80~8F)

No.9 group (90~9F)

No. A group (A0~AF)

No. B group (B0~BF)

No. C group (C0~CF)

No. D group (D0~DF)

No. E group (E0~EF)

No. F group (F0~FF)

WARNING

• Valve address and central control address of its corresponding

indoor unit should be set identical in manual addressing.

Valve (04)

EX)

Valve (03)

Valve (02)

Valve (01)

Indoor unit (04)

Indoor unit (03)

Indoor unit (02)

Indoor unit (01)

Central control address

HR unit

Setting the optional function

Select the mode/function/option/value using ‘▶’, ‘◀’ Button and

confirm that using the ‘●’ button after DIP switch No.5 is turned on.

ARUM***B(D)TE5 ARUM***CTE5

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW01D (reset)

SW03C (ȯ: forward)

SW01C (Ɨ: Conﬁrm /

Automatic Addressing)

SW02C (ȭ: backward)

SW04C (X : cancel)

DIP-SW01

7-Segment

SW04D (reset)

SW03C (ȯ: forward)

Optional Mode Selection Function Selection Option Selection

Remarks

Content

Display (◎)

Content

Display

(◀, ▶ ’ ◎)

Default

Optional

(◀, ▶ ’ ◎)

FDD

Automatic Refrigerant

Charging (Cooling)

* Refer FDD

guidance

Automatic Refrigerant

Charging (Heating)

Refrigerant Amount

Check (Cooling)

Refrigerant Amount

Check (Heating)

Automatic system check

mode (cooling or heating)

All IDU operation

(Cooling)

Compulsory

Operation

for 1 hour

All IDU operation

(Heating)

Installation

Cool & Heat

Selector

oFF

oFF,

oP1~oP2

Saving in

EEPROM

High Static Pressure

Compensation mode

oFF

oFF,

oP1~oP7

Night Low Noise

mode

oFF

oFF,

oP1~oP12

Overall Defrost

mode

North

America: oFF

Europe: oFF

Tropical: oN

on, oFF

ODU address setting

0 254

Snow Removal &

Rapid Defrost

oFF

oFF,

oP1~oP3

Airflow Adjusting

for IDU

(Heating capacity up)

oFF on, oFF

Target Pressure

Adjusting

oFF

oFF,

oP1~oP6

Low Ambient Kit

oFF on, oFF

High Efficiency

Mode (Cooling

Operation)

oFF on, oFF

Auto Dust Removal

Mode

oFF

oFF,

oP1~oP5

Compressor Max.

Frequency Limit

oFF

oFF,

oP1~oP9

ODU Fan Max.

RPM Limit mode

oFF

oFF,

oP1~oP7

Smart Load Control

Mode setting

oFF

oFF,

oP1~oP3

Humidity Reference

Mode setting

on on, oFF

Central Control

Connection at

Indoor Unit side

oFF oFF, on

Compressor Input

Current Limit mode

oFF

oFF,

oP1~oP10

Overall Defrost

Operating in Low

temperature

(Heating)

oFF on, oFF

Optional Base panel

Heater

oFF on, oFF

User

Comfort Cooling

Mode setting

EAch

* Refer

Comfort

Cooling

guidance

Saving in

EEPROM

Service

Vaccum Mode vACC -

1 time /

1 Selection

* Functions saved in EEPROM will be maintained continuously,

though the system power was reset.

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 49

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FAN Maximum RPM of each step

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn2” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“op1~op7” Push the ‘●’ button

Start the Static pressure compensation mode :

Save the selected option value in EEPROM

Chassis UXA UXB

Max. RPM

Standard 880 1 000

Overload / Low

Temperature

880 1 150

op1 860 950

op2 840 900

op3 820 850

op4 800 800

op5 780 750

op6 760 700

op7 740 650

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn3” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“op1~op12” Push the ‘●’ button

Start the Night low noise function :

Save the selected option value in EEPROM

Night Low Noise Function (Fn 3)

In cooling mode, this function makes the ODU fan operate at low RPM

to reduce the fan noise of ODU at night which has low cooling load.

Night low noise function setting method

High Static Pressure Compensation mode (Fn 2)

This function secures the air flow rate of ODU, in case static pressure

has been applied like using duct at fan discharge of ODU.

Static pressure compensation mode setting method

Function setting

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn1” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”,“op2” Push the ‘●’ button

Cool & Heat Selection mode is set

Cool & Heat selector (Fn 1)

Mode setting method

Switch Control Function

Switch

(Up)

Switch

(Down)

oFF op1(mode) op2(mode)

Right side

(On)

Left side

(On)

Not operate Cooling Cooling

Right side

(On)

Right side

(On)

Not operate Heating Heating

Left side

(Off)

- Not operate Fan mode Off

Switch (Up)

Switch (Down)

Left side

Right side

• To perform the otional funtion should be sure that All the IDU is off

mode, unless the function will not be performed.

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• If use a function, first install a Cool & Heat selector.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 50

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Time Settings

Step Judgment Time(Hr) Operation Time(Hr)

op1 8 9

op2 6.5 10.5

op3 5 12

op4 8 9

op5 6.5 10.5

op6 5 12

op7 8 9

op8 6.5 10

op9 5 12

op10 Continuous operation

op11 Continuous operation

op12 Continuous operation

Noise

Step Noise(dBA)

op1 ~ op3, op10 -3

op4 ~ op6, op11 -6

op7 ~ op9, op12 -9

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn4” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“on” ~ “oFF” Push the ‘●’ button

Overall defrost mode is set

Mode setting

- on: Operate overall defrost

- off: Operate partial defrost

Mode setting

setting Mode

oFF Not setting

op1 Snow removal mode

op2 Rapid defrost mode

op3 Snow removal mode. + Rapid defrost mode.

Snow removal & rapid defrost (Fn 6)

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn6” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1” ~ “op3” Push the ‘●’ button

Mode is set

Setting the ODU address (Fn 5)

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn5” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“0” ~ “255” Push the ‘●’ button

ODU address is set

Overall HEX defrost mode (Fn 4)

Mode setting method

• Request installer to set the function during installation.

• If ODU RPM changes, cooling capacity may go down.

CAUTION

• Ask an authorized technician to setting a function.

CAUTION

• Ask an authorized technician to setting a function.

• If use a function, first install a Central controller.

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 51

Setting

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“op1” ~ “op4” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn8” Push the ‘●’ button

Target pressure is set

Select the Option using ‘▶’, ‘◀’ Button :

“HEAT” , “COOL” Push the ‘●’ button

Mode

Purpose

Condensing

temperature

variation

Evaporating

temperature

variation

Heat Cool

op1 Increase capacity Increase capacity

+2 °C

(35.6 °F)

-3 °C

(37.4 °F)

op2

Decrease power

consumption

Increase capacity

+2 °C

(35.6 °F)

-1.5 °C

(-34.7 °F)

op3

Decrease power

consumption

Decrease power

consumption

-4 °C

(-39.2 °F)

+2.5 °C

(36.5 °F)

op4

Decrease power

consumption

Decrease power

consumption

-6 °C

(-42.8 °F)

-4.5 °C

(-40.1 °F)

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn10” Push the ‘●’ button

High Efficiency Mode is set

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

- Target low pressure will change according to ODU temperature

during the cooling operation.

ENGLISH

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn11” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op5” Push the ‘●’ button

Auto Dust Removal Mode is set

Mode Setting

Setting

Operation

time

Operating

time

Repeat

cycle

Detail of function

op1

Stop

+2 hours

5 minutes 2 hours

After product stopped 2 hours,

fan operating 5 minutes.

(Repeated every 2 hours)

op2

stop

+5 minutes

3 minutes

Twice

in 2

hours

After product stopped 5

minutes, fan operating 3

minutes. (Limited to two

times within 2 hours)

op3

stop

+5 minutes

3 minutes 1 time

After product stopped 2

hours, fan operating 5

minutes. (Repeated every 2

hours)

op4

Stop

+1 minute

1 minute 1 time

After product stopped 5 minutes,

fan operating 3 minutes. (when io

module connection / one-time

operation)

op5

Stop

+1 minute

1 minute

Low

speed

After product stopped 1

minute, fan operating 1 minute.

(every time the product stops)

Auto Dust Removal Mode (Fn 11)

The ability to set reverse run outdoor fan to remove dust, heat

exchanger.

Mode setting method

High Efﬁciency Mode (Cooling Operation) (Fn 10)

Mode setting method

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn9” Push the ‘●’ button

Low Ambient Kit Mode is set

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

h Reference for functional logic of I/O Module

Low Ambient Kit (Fn 9)

Mode setting method

Target pressure adjusting (Fn 8)

Mode setting method

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• Change a power consumption or capacity.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 52

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Function setting

Setting Frequency (Hz)

oFF -

op1 143 Hz

op2 135 Hz

op3 128 Hz

op4 120 Hz

op5 113 Hz

op6 105 Hz

op7 98 Hz

op8 90 Hz

op9 83 Hz

MAX. RPM Limit Setting

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn13” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op7” Push the ‘●’ button

ODU Fan Max. RPM Limit Mode is set

Chassis UXA UXB

Fan MAX. RPM

Limit (RPM)

oFF 880 1 000

oP1 -20 -50

oP2 -40 -100

oP3 -60 -150

oP4 -80 -200

oP5 -100 -250

oP6 -120 -300

oP7 -140 -350

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn 12” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”,“op9” Push the ‘●’ button

Cool & Heat Selection mode is set

SLC(Smart Load Control) Mode

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn14” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~“op3” Push the ‘●’ button

SLC(Smart Load Control) Mode is set

Setting Mode Detail of function

oFF Not Setting -

oP1 Smooth Mode Slowly control, a target pressure value

oP2 Normal Mode Normal control, a target pressure value

oP3 Peak Mode Fast control, a target pressure value

Mode setting

- on:using humidity sensor

- oFF:not setting

- When used cooling operation of SLC function,it will improve energy

effcience because evaporation temperature wll be decreased

- When used heating operation in case of high humidity condition,

deforest will be delayed because target high/low pressure will be

changed.

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn16” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“on” Push the ‘●’ button

Humidity Reference Control mode is set

Humidity Reference Control (Fn 16)

Mode setting method

SLC (Smart Load Control) (Fn 14)

Function for set the variable target pressure which for the high

efficiency and comport operation depend on ODU load.

Mode setting method

ODU Fan Max. RPM Limit (Fn 13)

Mode setting method

Compressor Max. Frequency Limit (Fn 12)

Mode setting method

• Ask an authorized technician to setting a function.

• If use a function, first install a Central controller.

CAUTION

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Compressor Input Current Limit

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn20” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“op1”~”op10” Push the ‘●’ button

Compressor Input Current Limit mode is set

Mode Compressor Input Current Limit

oFF 100 %

op1 95 %

op2 90 %

op3 85 %

op4 80 %

op5 75 %

op6 70 %

op7 65 %

op8 60 %

op9 55 %

op10 50 %

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn16” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“Fn19” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“on”,“oFF” Push the ‘●’ button

Central Control Connection at Indoor

Unit side Mode is set

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn23” Push the ‘●’ button

Select the Option using ‘▶’, ‘◀’ Button :

“oFF”,“on” Push the ‘●’ button

Base pan Heater operation mode is set

Base pan Heater operation (Fn 23)

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Func” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn21” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Fn22” Push the ‘●’ button

Overall Defrost Operating in Low Mode is set

Setting Detail of function

Defualt OFF

Setting ON/OFF Control

Overall Defrost Operating in Low temperature

(Heating) (Fn 22)

Mode setting method

Compressor Input Current Limit Mode (Fn 20)

System Input Current Control

Mode setting method

Central Control Connection at Indoor Unit side (Fn 19)

Mode setting method

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• If use a function, capacity may go down.

CAUTION

• Function to prevent freezing of ODU base pan in a cold area.

• Heater is accesory.(Sold separately)

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 54

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Setting of comfort cooling operation

Master unit PCB DIP switch on : No.5

Select the mode using ‘▶’, ‘◀’ Button :

“Idu” Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

“Id10” Push the ‘●’ button

EEV pulse appearing

(seg1, seg2:Idu No./seg3, seg4:Mode)

Select the Function using ‘▶’, ‘◀’ Button :

Idu No. setting and Push the ‘●’ button

Select the Function using ‘▶’, ‘◀’ Button :

Mode setting and Push the ‘●’ button

*Mode can be set 0~3 (”0” is no setting)

Setting of comfort cooling operation

Mode setting Effect

0 No setting

1 Cooling capacity low,Power consumption low

2 Cooling capacity mid,Power consumption mid

3 Cooling capacity high,Power consumption high

Comfort Cooling operation (Id 10)

It is function to reduce the ODU energy consumption by the continuou

s operation without thermo off.

Mode setting method

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 55

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Self-Diagnosis Function

Error Indicator

- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.

- Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as

shown in the table.

- If more than two troubles occur simultaneously, lower number of error code is first displayed.

- After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number.(* = 1: Master, 2: Slave 1, 3: Slave 2)

Ex) 1051 : Error occurrence with error number 105 at No. 1 outdoor unit (=Master unit)

In case of indoor unit error occurrence, the error number is only shown at remote controller

without 7 segment LED of outdoor unit.

Ex) CH → 01 : Error occurrence with error number 01 (at remote controller)

In case of compressor error occurrence, 7 segment LED of outdoor unit control board

will display its error number alternately with compressor number.

Ex) 213 → C23 : It means that compressor error occurred with Error No. 21 at No. 3 Outdoor unit (=Slave 2)

* Refer to the DX-Venitilation manual for DX-Venitilation error code.

Error No. of Compressor

Error No.

Error No. of Unit

Repeat

Display Title Cause of Error

Indoor unit related error

0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short

0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short

0 3 -

Communication error : wired remote controller ↔

indoor unit

Failing to receive wired remote controller signal in indoor unit PCB

0 4 - Drain pump Malfunction of drain pump

0 5 -

Communication error : outdoor unit ↔ indoor unit

Failing to receive outdoor unit signal in indoor unit PCB

0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short

08 -

Hydro Kit Hot water storage tank Temperature

sensor

Pipe temperature sensor is open or short

0 9 - Indoor EEPROM Error

In case when the serial number marked on EEPROM of

Indoor unit is 0 or FFFFFF

1 0 - Poor fan motor operation

Disconnecting the fan motor connector / Failure of indoor

fan motor lock

1 1 -

Communication error : Hydro Kit Indoor unit ↔

Inv.PCB

Failing to receive Inv. PCB signal in indoor unit

1 2 - Hydro Kit Inv.PCB error Hydro Kit Inv.PCB error

1 3 - Hydro Kit Solar heat piping temperature sensor error Pipe temperature sensor is open or short

1 4 - Hydro Kit Indoor unit Flow switch error Flow switch flow detection error

1 5 - Hydro Kit Liquid pipe Strange overheat Error Temperature sensor defective or hot water inflow

16 -

Hydro Kit Indoor unit Inlet and Outlet pipe

Temperature sensor Error

Pipe temperature sensor is open or short

17 -

Hydro Kit Indoor unit Inlet pipe Temperature sensor

Error

Outside air Introduction duct Inlet pipe Temperature

sensor Error

Pipe temperature sensor is open or short

18 -

Hydro Kit Indoor unit Outlet pipe Temperature

sensor Error

Pipe temperature sensor is open or short

2 3 0 - Error in refrigerant leakage detection

Occurs when a refrigerant leakage sensor is detecting refrigerant

leakage

237 -

Poor communication between the outdoor unit and

the indoor unit

The indoor unit could not receive the communication signal

from the outdoor unit for at least 3 consecutive minutes

238 -

Poor communication between the controlling part of

the outdoor unit and the indoor unit.

The controlling part of the outdoor unit could not receive the signal

for controlling the indoor unit

Outdoor unit related error

2 1 * Master Outdoor Unit Inverter Compressor IPM Fault Master Outdoor Unit Inverter Compressor Drive IPM Fault

2 2 *

Inverter PCB Input Over Current(RMS) of Master

Outdoor Unit

Master Outdoor Unit Inverter PCB Input Current excess (RMS)

2 3 *

Master Outdoor Unit Inverter Compressor DC Link

Low or High Voltage

System is turned off by Master Outdoor Unit DC Link Low/High

Voltage.

2 4 * Master Outdoor Unit High Pressure Switch System is turned off by Master Outdoor Unit high pressure switch.

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 56

ENGLISH

Display Title Cause of Error

2 5 *

Master Outdoor Unit Input Voltage High/ Low

Voltage

Master Outdoor Unit input voltage is over 537 V or below 247 V

(ARUM***LTE5)

Master Outdoor Unit input voltage is over 310 V or below 143 V

(ARUM***BTE5)

Master Outdoor Unit input voltage is over 598 V or below 320 V

(ARUM***DTE5)

Master Outdoor Unit input voltage is over 776 V or below 373 V

(ARUM***CTE5)

2 6 *

Master Outdoor Unit Inverter Compressor Start

Failure

The first start failure by Master Outdoor Unit Inverter Compressor

abnormality or Compressor locked

2 9 *

Master Outdoor Unit Inverter Compressor Over

Current

Master Outdoor Unit Inverter Compressor Fault or some bits in

pipe.

3 2 *

Master Outdoor Unit Inverter Compressor1 High

Discharge Temperature

Master Outdoor Unit Inverter Compressor1 High Discharge

Temperature

3 3 *

Master Outdoor Unit Inverter Compressor2 High

Discharge Temperature

Master Outdoor Unit Inverter Compressor2 High Discharge

Temperature

3 4 * High Pressure of Master Outdoor Unit High Pressure of Master Outdoor Unit

3 5 * Low Pressure of Master Outdoor Unit Low Pressure of Master Outdoor Unit

40*

Master Outdoor Unit Inverter Compressor CT

Sensor Fault

Master Outdoor Unit Inverter Compressor CT Sensor open or short

4 1 *

Master Outdoor Unit Inverter Compressor1

Discharge Temperature Sensor Fault

Master Outdoor Unit Inverter Compressor Discharge Temperature

Sensor open or short

4 2 * Master Outdoor Unit Low Pressure Sensor Fault Master Outdoor Unit Low Pressure Sensor open or short

4 3 * Master Outdoor Unit High Pressure Sensor Fault Master Outdoor Unit High Pressure Sensor open or short

4 4 * Master Outdoor Unit Air Temperature Sensor Fault Master Outdoor Unit Air Temperature Sensor open or short

4 5 *

Master Outdoor Unit Heat Exchanger Temperature

Sensor (Front side) Fault

Master Outdoor Unit Heat Exchanger Temperature Sensor(Front

side) open or short

4 6 *

Master Outdoor Unit Suction Temperature Sensor

Fault

Master Outdoor Unit Suction Temperature Sensor open or short

4 7 *

Master Outdoor Unit Inverter Compressor2

Discharge Temperature Sensor Fault

Master Outdoor Unit Inverter Compressor2 Discharge Temperature

Sensor open or short

4 9 *

Master Outdoor Unit Faulty IPM Temperature

Sensor

Master Outdoor Unit IPM Temperature Sensor short/open

50*

Omitting connection of R, S, T power of Master

Outdoor Unit

Omitting connection of Master outdoor unit

5 1 * Excessive capacity of indoor units

Excessive connection of indoor units compared to capacity of

Outdoor Unit

52*

Communication error : inverter PCB ’ Main PCB

Failing to receive inverter signal at main PCB of Master Outdoor

Unit

53*

Communication error : indoor unit ’ Main PCB of

Outdoor Unit

Failing to receive indoor unit signal at main PCB of Outdoor Unit.

57*

Communication error : Main PCB ’ inverter PCB

Failing to receive signal main PCB at inverter PCB of Master

Outdoor Unit

6 0 * Inverter PCB EEPROM Error of Master Outdoor Unit Access Error of Inverter PCB of Master Outdoor Unit

62*

Master Outdoor Unit Inverter Heatsink High

Temperature

System is turned off by Master Outdoor Unit Inverter Heatsink High

Temperature

65*

Master Outdoor Unit Inverter Heatsink Temperature

Sensor Fault

Master Outdoor Unit Inverter Heatsink Temperature Sensor open

or short

6 7 * Master Outdoor Unit Fan Lock Restriction of Master Outdoor Unit

7 1 * Inverter CT Sensor Error of Master Outdoor Unit Inverter CT Sensor open or short of Master Outdoor Unit

7 5 * Master Outdoor Unit Fan CT Sensor Error Master Outdoor Unit Fan CT Sensor open or short

7 7 * Master Outdoor Unit Fan Over Current Error Master Outdoor Unit Fan Current is over 6A

7 9 * Master Outdoor Unit Fan Start Failure Error

The first start failure by Master Outdoor Unit Fan abnormality or

Fan locked

8 6 * Master Outdoor Unit Main PCB EEPROM Error

Communication Fail Between Master Outdoor Unit Main MICOM

and EEPROM or omitting EEPROM

8 7 * Master Outdoor Unit Fan PCB EEPROM Error

Communication Fail Between Master Outdoor Unit Fan MICOM

and EEPROM or omitting EEPROM

1 0 4*

Communication Error Between Master Outdoor

Unit and Other Outdoor Unit

Failing to receive Slave Unit signal at main PCB of Master

Outdoor Unit

1 0 5* Outdoor Unit Fan PCB Communication Error Failing to receive fan signal at main PCB of Outdoor unit

1 0 6* Outdoor Unit Fan IPM Fault Error Instant Over Current at Outdoor Unit Fan IPM

Outdoor unit related error

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 57

ENGLISH

Checking procedure of limiting concentration

Check concentration limit along following steps and take appropriate

measure depending on the situation.

Calculate amount of all the replenished refrigerant [kg (lbs)] per each

refrigerant system.

Concentration limit is the limit of Freon gas concentration where

immediate measures can be taken without hurting human body

when refrigerant leaks in the air. The Concentration limit shall be

described in the unit of [kg/m

(lbs/ft

)] (Freon gas weight per unit

air volume) for facilitating calculation.

Concentration limit: 0.44 kg/m

(0.028 lbs/ft

) (R410A)

Amount of additional

replenished refrigerant

Total amount of refrigerant

in in the system [kg (lbs)]

Note : In case one refrigerant facility is

divided into 2 or more refrigerant

systems and each system is

independent, amount of replenished

refrigerant of each system shall be

adopted.

Amount of pre-charged

refrigerant per single

Amount of replenished

refrigerant at factory shipment

Amount of additionally

replenished refrigerant

depending on piping

length or piping

diameter by customer

Outdoor unit

(No.1 system)

Flow of

refrigerant

Indoor unit

Room where refrigerant leaks

(Refrigerant of the whole No.1

system ﬂows out.)

CAUTION FOR REFRIGERANT LEAK

The installer and system specialist shall secure safety against leakage

according to local regulations or standards.

The following standards may be applicable if local regulations are not

available.

Introduction

Though the R410A refrigerant is harmless and incombustible itself ,

the room to equip the air conditioner should be large to such an extent

that the refrigerant gas will not exceed the concentration limit even if

the refrigerant gas leaks in the room.

Concentration limit

h : HR unit # : HR unit number

Display Title Cause of Error

Outdoor unit related error

1 0 7* Outdoor Unit Fan DC Link Low Voltage Error Outdoor Unit Fan DC Link Input Voltage is under 380 V

1 1 3* Outdoor Unit Liquid pipe Temperature Sensor Error Liquid pipe temperature sensor of Outdoor Unit is open or short

1 1 4*

Outdoor Unit Subcooling Inlet Temperature Sensor

Error

Outdoor Unit Subcooling Inlet Temperature Sensor Error

115 *

Outdoor Unit Subcooling Outlet Temperature

Sensor Error

Outdoor Unit Subcooling Outlet Temperature Sensor Error

1 1 6 * Outdoor Unit Oil Level Sensor Error Oil Level Sensor of Outdoor Unit is open or short

145 *

Outdoor unit Main Board - External Board

communication Error

Outdoor unit Main Board - External Board communication Error

1 5 0 * Outdoor Unit Discharge Superheat not satisfied

Outdoor Unit Compressor Discharge Superheat not satisfied

during 5 Min.

151 *

Failure of operation mode conversion at Outdoor

Unit

Failure of operation mode conversion at Outdoor Unit

153 *

Outdoor Unit Heat Exchanger Temperature Sensor

(upper part) Fault

Outdoor Unit Heat Exchanger Temperature Sensor (upper part)

Fault

154 *

Outdoor Unit Heat Exchanger Temperature Sensor

(lower part) Fault

Outdoor Unit Heat Exchanger Temperature Sensor(lower part)

open or short

182 *

Outdoor unit External Board Main-Sub Micom

communication Error

Outdoor Unit Main Board Main-Sub Micom communication failed

1 8 7 * Hydro - Kit P,HEX bursting error

Inlet water temperature is below 5 degree or water temperature

error during defrosting operation.

1 9 3 * Outdoor Unit Fan Heatsink High Temperature

System is turned off by Outdoor Unit Fan Heatsink High

Temperature

194 *

Outdoor Unit Fan Heatsink Temperature Sensor

Fault

Outdoor Unit Fan Heatsink Temperature Sensor open or short

HR Unit related error

2 0 0 1 Searching pipe Error Failure of automatic addressing of valves

201

#HR + h

HR unit1 Liqiud sensor error Liquid pipe sensor of HR unit open or short

202

#HR + h

HR unit1 Sub Cooling Pipe sensor error Sub Cooling Pipe In sensor of HR unit open or short

203

#HR + h

HR unit1 Sub Cooling Pipe Out sensor error Sub Cooling Pipe Out sensor of HR unit. open or short

204

#HR + h

Communication error Failing to receive HR unit signal at outdoor unit

205

#HR + h

Communication error between HR unit and the

upgraded 485 modem.

4 series upgraded 485 communication error between

HR unit and HR unit modem

206

#HR + h

Duplicate address error of HR unit

When the HR unit address is set duplicated at the 4 series

upgraded 485 communication

207

#HR + h

Communication error between Master and Slave

Main PCB of HR Unit

When fail to communication between Master and Slave Main PCB

of HR Unit

208

#HR + h

Communication error of EEPROM of HR Unit When fail to communication of EEPROM of HR Unit

Network error

2 4 2 * Network error of cntral controller Communication wiring defect

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 58

ENGLISH

Calculate minimum room capacity

Calculate room capacity by regarding a portion as one room or the

smaller room.

- With partition and with opening

which serve as passage of air to

adjoining room

- Without partition

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Opening

Partition

In the case of opening

without door, or 0.15 %

or more openings

(to ﬂoor space) both

above and below door)

- With partition and without opening which serve as passage of air to

adjoining room

Calculate refrigerant concentration

Total amount of

replenishedrefrigerant in

refrigerant facility [kg(lbs)]

Volume of smallest room

whereindoor unit is installed

(ft

)]

- In case the result of calculation exceeds the concentration limit, perform the

same calculations by shifting to the second smallest, and the third smallest

rooms until at last the result is below the concentration limit.

In case the concentration exceeds the limit

When the concentration exceeds the limit, change original plan or take

one of the countermeasures shown below:

• Countermeasure 1

Provide opening for ventilation.

Provide 0.15 % or more size of opening to floor space both above

and below door, or provide opening without door.

• Countermeasure 2

Provide gas leak alarm linked with mechanical ventilator.

• Countermeasure 3

Reducing the outdoor refrigerant qty by dividing into smaller

separate system.

= Maximum concentration limit

[kg/m

(lbs/ft

)]

(R410A)

Outdoor unit

Indoor unit

Smallest

room

Countermeasure 2

Gas leak alarm

Mechanical ventilator

Countermeasure 1

Opening effective to ventilation

Indoor unit

Pay a special attention to the place, such as a basement, etc.

where refrigerant can stay, since refrigerant is heavier than air.

INSTALLATION GUIDE AT THE

SEASIDE

• Periodic (1 times per 6 months) cleaning of the dust or salt

particles stuck on the heat exchanger Is necessary by using

clean water

In case, to install the outdoor unit on the seaside, set up a windbreak

not to be exposed to the sea wind.

- It should be strong enough like concrete to prevent the sea wind

from the sea.

- The height and width should be more than 150 % of the outdoor unit.

- It should be kept more than 70 cm (2.3 ft) of distance between

outdoor unit and the windbreak for smooth air flow.

Select a well-drained place.

Sea wind

Windbreak

Selecting the location(Outdoor Unit)

If the outdoor unit is to be installed close to the seaside, direct

exposure to the sea wind should be avoided. Install the outdoor unit on

the opposite side of the sea wind direction.

Sea wind

• Air conditioners should not be installed in areas where corrosive

gases, such as acid or alkaline gas, are produced.

• Do not install the product where it could be exposed to sea

wind (salty wind) directly. It can result corrosion on the product.

Corrosion, particularly on the condenser and evaporator fins,

could cause product malfunction or inefficient operation.

• If outdoor unit is installed close to the seaside, it should avoid

direct exposure to the sea wind. Otherwise it needs additional

anticorrosion treatment on the heat exchanger.

CAUTION

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 59

ENGLISH

• Product Name : Air conditioner

• Model Name :

• Additional information : Serial number is refer to the bar code on the

product.

Product Sales Name Model Factory Name

ARUx***yTE5 series

x = N (Heat Pump), V (Cooling Only),

M (Heat Recovery / Heat Pump)

y = B (208/230 V)

D (460 V)

C (575 V)

*** = Numeric; (Cooling capacity)

Product information

Model Designation

1,MFL68980308,영영 2018. 11. 13. 영영 3:24 Page 60

LG ARUM241DTE5 Air Conditioners

Product's Documents

User Manual

Specifications

LG Electronics ARUM241DTE5 Questions and Answers

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