LG Electronics ARUB121BTE4 Air Conditioner User Manual

P/NO : MFL68460504

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.

http://www.lghvac.com

www.lg.com

ENGLISH

FRANÇAIS

ESPAÑOL

• 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 condi-

tioner 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 :

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:

TIPS FOR SAVING ENERGY

ENGLISH

TIPS FOR SAVING ENERGY

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

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 Con-

struction 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 mal-

function, property damage, personal injury and/or death.

Installation

• Have all electric work done by a licensed electrician according to "Electric Facility Engineering Stan-

dard" and "Interior Wire Regulations" and the instructions given in this manual and always use a spe-

cial 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 mal-

function 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 ex-

ceeded. 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.

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

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 equip-

ment 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 per-

sonal 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.

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.

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

• 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.

2 TIPS FOR SAVING ENERGY

3 IMPORTANT SAFETY INSTRUC-

TIONS

8 INSTALLATION PROCESS

9 OUTDOOR UNITS INFORMATION

19 ALTERNATIVE REFRIGERANT

R410A

20 SELECT THE BEST LOCATION

22 INSTALLATION SPACE

22 Individual Installation

24 LIFTING METHOD

25 INSTALLATION

25 The location of the Anchor bolts

26 Foundation for Installation

27 Preparation of Piping

30 Plumbing materials and storage methods

32 REFRIGERANT PIPING INSTAL-

LATION

32 Precautions on Pipe connection / Valve operation

33 Installation procedure for HR unit

33 Connection of Outdoor units

34 Installation of Outdoor Unit, HR Unit and Indoor Unit

Refrigerant Pipe

35 Type of HR Unit

36 Installation of Zoning Control

38 PIPE CONNECTIONS BETWEEN

INDOOR AND OUTDOOR UNIT

38 Preparation Work

39 Pipe Drawing Out during Single / Series connection

41 Refrigerant piping system

52 Refrigerant charging

53 Branch pipe Fitting

57 Leak Test and Vacuum drying

59 Vacuum Mode

60 Thermal insulation of refrigerant piping

61 ELECTRICAL WIRING

61 Caution

63 Control box and connecting position of wiring

64 Communication and Power Cables

65 Wiring of main power supply and equipment capacity

66 Field Wiring

79 Checking the setting of outdoor units

80 Switch for setup of HR Unit

80 HR UNIT PCB

85 Automatic Addressing

89 Example of manual valve addressing (Non-Zoning

setting)

90 Example of manual valve addressing (Zoning setting)

91 Method of checking the pipe detection result at out-

door unit

91 Identiﬁcation of Manual Valve ID (Address)

Method of checking the pipe detection result at HR unit

92 Setting method of Master indoor unit in zoning

94 Group Number setting

95 TEST RUN

95 Cool & Heat selector

96 Static pressure compensation mode

97 Night Low Noise Function

98 Overall defrost mode

99 Setting the ODU address

100 Snow removal & rapid defrost

101 Target pressure adjusting

102 Self-Diagnosis Function

106 CAUTION FOR REFRIGERANT

LEAK

106 Introduction

106 Checking procedure of limiting concentration

108 INSTALLATION GUIDE AT THE

SEASIDE

109 OUTDOOR UNIT (ODU) INSTAL-

LATION DETAILS FOR (3) FOAM

SCREW PROTECTOR PADS.

TABLE OF CONTENTS

ENGLISH

INSTALLATION PROCESS

ENGLISH

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 24hours at 3.8 MPa(38.7 kgf/cm

) 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.

CAUTION

• The above list indicates the order in which the individual work operations are normally car-

ried 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 3.8Mpa(551.1psi).

• 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.)

INSTALLATION PROCESS

Unit UX2 UX3 UX3

HP 8 10 12

Ton 6 8 10

Model

Name

Combination Unit ARUB072BTE4 ARUB096BTE4 ARUB121BTE4

Independent Unit

Refrigerant Precharged Amount

kg 7.7 10.7 10.7

lbs 16.9 23.6 23.6

Number of maxmum connectable indoor units

13 16 20

Net Weight

kg (195 × 1) (245 × 1) (245 × 1)

lbs (430 × 1) (540 × 1) (540 × 1)

Dimensions (WxHxD)

mm (920×1,680×760)×1 (1,240×1,680×760)×1 (1,240×1,680×760)×1

inch (36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

Pipe Con-

nections

Liquid Pipes

mm(inch)

9.52(3/8) 9.52(3/8) 12.7(1/2)

Low Pressure Gas Pipes mm(inch)

19.05(3/4) 22.2(7/8) 28.58(1 1/8)

High Pressure Gas Pipes mm(inch)

15.88(5/8) 19.05(3/4) 19.05(3/4)

OUTDOOR UNITS INFORMATION

ENGLISH

Power Supply : 3Ø, 208/230V, 60Hz

Model Name : ARUB***BTE4

CAUTION

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

If you want to connect more than 130% combination, please contact us and dis-

cuss the requirement like below.

• If the operation of indoor unit is more than 130%, the airflow is operated as low in the all

indoor units.

Combination

Outdoor Number Connection Ratio

Single outdoor units 130%

Double outdoor units 130%

Triple outdoor units 130%

OUTDOOR UNITS INFORMATION

ENGLISH

Unit UX2+UX3 UX3+UX3 UX3+UX3

HP 22 24 26

Ton 18 20 22

Model

Name

Combination Unit ARUB216BTE4 ARUB240BTE4 ARUB264BTE4

Independent Unit

ARUB144BTE4 ARUB144BTE4 ARUB144BTE4

ARUB072BTE4 ARUB096BTE4 ARUB121BTE4

Refrigerant Precharged Amount

kg 18.4 21.4 21.4

lbs 40.5 47.2 47.2

Number of maxmum connectable indoor units

35 39 42

Net Weight

kg (195 × 1) + (285 × 1) (245 × 1) + (285 × 1) (245 × 1) + (285 × 1)

lbs (430 × 1) + (628 × 1) (540 × 1) + (628 × 1) (540 × 1) + (628 × 1)

Dimensions (WxHxD)

(920×1,680×760)×1

(1,240×1,680×760)×1

(1,240×1,680×760)×2 (1,240×1,680×760)×2

inch

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 34.9(1 3/8) 34.9(1 3/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

Unit UX3 UX3 UX2+UX3

HP 14 18 20

Ton 12 14 16

Model

Name

Combination Unit ARUB144BTE4 ARUB168BTE4 ARUB192BTE4

Independent Unit

ARUB121BTE4

ARUB072BTE4

Refrigerant Precharged Amount

kg 10.7 10.7 18.4

lbs 23.6 23.6 40.5

Number of maxmum connectable indoor units

23 29 32

Net Weight

kg (285 × 1) (285 × 1) (195 × 1) + (245 × 1)

lbs (628 × 1) (628 × 1) (430 × 1) + (540 × 1)

Dimensions (WxHxD)

mm (1,240×1,680×760)×1 (1,240×1,680×760)×1

(920×1,680×760)×1

(1,240×1,680×760)×1

inch (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

Pipe Con-

nections

Liquid Pipes

mm(inch)

12.7(1/2) 15.88(5/8) 15.88(5/8)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

High Pressure Gas Pipes mm(inch)

22.2(7/8) 22.2(7/8) 22.2(7/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit UX3+UX3 UX2+UX3+UX3 UX3+UX3

HP 28 32 32

Ton 24 26 26

Model

Name

Combination Unit ARUB288BTE4 ARUB312BTE4 ARUB313BTE4

Independent Unit

ARUB144BTE4 ARUB144BTE4 ARUB168BTE4

ARUB144BTE4 ARUB096BTE4 ARUB144BTE4

ARUB072BTE4

Refrigerant Precharged Amount

kg 21.4 29.1 21.4

lbs 47.2 64.1 47.2

Number of maxmum connectable indoor units

45 52 52

Net Weight

kg (285 × 2)

(195 × 1) + (245 × 1)

+ (285 × 1)

(285 × 2)

lbs (628 × 2)

(430 × 1) + (540 × 1)

+ (628 × 1)

(628 × 2)

Dimensions (WxHxD)

mm (1,240×1,680×760)×2

(920×1,680×760)×1

(1,240×1,680×760)×2

inch (48.8×66.1×29.9)×2

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

Unit UX3+UX3+UX3 UX3+UX3 UX3+UX3+UX3

HP 34 34 36

Ton 28 28 30

Model

Name

Combination Unit ARUB336BTE4 ARUB337BTE4 ARUB360BTE4

Independent Unit

ARUB144BTE4 ARUB168BTE4 ARUB144BTE4

ARUB096BTE4 ARUB168BTE4 ARUB121BTE4

ARUB096BTE4 ARUB096BTE4

Refrigerant Precharged Amount

kg 32.1 21.4 32.1

lbs 70.8 47.2 70.8

Number of maxmum connectable indoor units

55 55 58

Net Weight

kg (245 × 2) + (285 × 1) (285 × 2) (245 × 2) + (285 × 1)

lbs (540 × 2) + (628 × 1) (628 × 2) (540 × 2) + (628 × 1)

Dimensions (WxHxD)

mm (1,240×1,680×760)×3 (1,240×1,680×760)×2 (1,240×1,680×760)×3

inch (48.8×66.1×29.9)×3 (48.8×66.1×29.9)×2 (48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

34.9(1 3/8) 34.9(1 3/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

UX3 UX3+UX3+UX3

14 38

Ton

12 32

Model

Name

Combination Unit

ARUB145BTE4 ARUB384BTE4

Independent Unit

Combination only (Not for 1Unit) ARUB096BTE4

ARUB145BTE4

Refrigerant Precharged Amount

kg 10.7 32.1

lbs 23.6 70.9

Number of maxmum connectable indoor units

23 61

Net Weight

(305 × 1) 245 + 305 × 2

lbs

(672 × 1) 540 + 672 × 2

Dimensions (WxHxD)

(1,240×1,680×760)×1 (1,240×1,680×760)×3

inch

(48.8×66.1×29.9)×1 (48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

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

Unit

UX3+UX3+UX3

Ton

Model

Name

Combination Unit

ARUB408BTE4

ARUB432BTE4

Independent Unit

ARUB121BTE4

ARUB145BTE4

Refrigerant Precharged Amount

kg 32.1

32.1

lbs 70.8

70.8

Number of maxmum connectable indoor units

Net Weight

245 + 305 × 2

305 × 3

lbs

540 + 672 × 2

672 × 3

Dimensions (WxHxD)

(1,240×1,680×760)×3

inch

(48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4)

Low Pressure Gas Pipes mm(inch)

41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

UX3 UX3+UX3+UX3

18 46

Ton

14 38

Model

Name

Combination Unit

ARUB169BTE4 ARUB456BTE4

Independent Unit

Combination only (Not for 1Unit) ARUB169BTE4

ARUB145BTE4

Refrigerant Precharged Amount

10.7 32.1

lbs

23.6 70.8

Number of maxmum connectable indoor units

29 64

Net Weight

(305 x 1) (305 x 3)

lbs

(672 x 1) (672 x 3)

Dimensions (WxHxD)

(1,240x1,680x760)x1 (1,240x1,680x760)x3

inch

(48.8x66.1x29.9)x1 (48.8x66.1x29.9)x3

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

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

Unit

UX3+UX3+UX3 UX3+UX3+UX3

48 50

Ton

40 42

Model

Name

Combination Unit

ARUB480BTE4 ARUB504BTE4

Independent Unit

ARUB145BTE4 ARUB169BTE4

ARUB169BTE4 ARUB169BTE4

Refrigerant Precharged Amount

32.1 32.1

lbs

70.8 70.8

Number of maxmum connectable indoor units

64 64

Net Weight

(305 x 3) (305 x 3)

lbs

(672 x 3) (672 x 3)

Dimensions (WxHxD)

(1,240x1,680x760)x3 (1,240x1,680x760)x3

inch

(48.8x66.1x29.9)x3 (48.8x66.1x29.9)x3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

41.3(1 5/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Power Supply : 3Ø, 460V, 60Hz

Model Name : ARUB***DTE4

Unit UX2 UX3 UX3

HP 8 10 12

Ton 6 8 10

Model

Name

Combination Unit ARUB072DTE4 ARUB096DTE4 ARUB121DTE4

Independent Unit

Refrigerant Precharged Amount

kg 7.7 10.7 10.7

lbs 16.9 23.6 23.6

Number of maxmum connectable indoor units

13 16 20

Net Weight

kg (195 × 1) (245 × 1) (245 × 1)

lbs (430 × 1) (540 × 1) (540 × 1)

Dimensions (WxHxD)

mm (920×1,680×760)×1 (1,240×1,680×760)×1 (1,240×1,680×760)×1

inch (36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

Pipe Con-

nections

Liquid Pipes

mm(inch)

9.52(3/8) 9.52(3/8) 12.7(1/2)

Low Pressure Gas Pipes mm(inch)

19.05(3/4) 22.2(7/8) 28.58(1 1/8)

High Pressure Gas Pipes mm(inch)

15.88(5/8) 19.05(3/4) 19.05(3/4)

Unit UX3 UX3 UX2+UX3

HP 14 18 20

Ton 12 14 16

Model

Name

Combination Unit ARUB144DTE4 ARUB168DTE4 ARUB192DTE4

Independent Unit

ARUB121DTE4

ARUB072DTE4

Refrigerant Precharged Amount

kg 10.7 10.7 18.4

lbs 23.6 23.6 40.5

Number of maxmum connectable indoor units

23 29 32

Net Weight

kg (285 × 1) (285 × 1) (195 × 1) + (245 × 1)

lbs (628 × 1) (628 × 1) (430 × 1) + (540 × 1)

Dimensions (WxHxD)

mm (1,240×1,680×760)×1 (1,240×1,680×760)×1

(920×1,680×760)×1

(1,240×1,680×760)×1

inch (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

Pipe Con-

nections

Liquid Pipes

mm(inch)

12.7(1/2) 15.88(5/8) 15.88(5/8)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

High Pressure Gas Pipes mm(inch)

22.2(7/8) 22.2(7/8) 22.2(7/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit UX2+UX3 UX3+UX3 UX3+UX3

HP 22 24 26

Ton 18 20 22

Model

Name

Combination Unit ARUB216DTE4 ARUB240DTE4 ARUB264DTE4

Independent Unit

ARUB144DTE4 ARUB144DTE4 ARUB144DTE4

ARUB072DTE4 ARUB096DTE4 ARUB121DTE4

Refrigerant Precharged Amount

kg 18.4 21.4 21.4

lbs 40.5 47.2 47.2

Number of maxmum connectable indoor units

35 39 42

Net Weight

kg (195 × 1) + (285 × 1) (245 × 1) + (285 × 1) (245 × 1) + (285 × 1)

lbs (430 × 1) + (628 × 1) (540 × 1) + (628 × 1) (540 × 1) + (628 × 1)

Dimensions (WxHxD)

(920×1,680×760)×1

(1,240×1,680×760)×1

(1,240×1,680×760)×2 (1,240×1,680×760)×2

inch

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 34.9(1 3/8) 34.9(1 3/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

Unit UX3+UX3 UX2+UX3+UX3 UX3+UX3

HP 28 32 32

Ton 24 26 26

Model

Name

Combination Unit ARUB288DTE4 ARUB312DTE4 ARUB313DTE4

Independent Unit

ARUB144DTE4 ARUB144DTE4 ARUB168DTE4

ARUB144DTE4 ARUB096DTE4 ARUB144DTE4

ARUB072DTE4

Refrigerant Precharged Amount

kg 21.4 29.1 21.4

lbs 47.2 64.1 47.2

Number of maxmum connectable indoor units

45 52 52

Net Weight

kg (285 × 2)

(195 × 1) + (245 × 1) +

(285 × 1)

(285 × 2)

lbs (628 × 2)

(430 × 1) + (540 × 1) +

(628 × 1)

(628 × 2)

Dimensions (WxHxD)

mm (1,240×1,680×760)×2

(920×1,680×760)×1

(1,240×1,680×760)×2

inch (48.8×66.1×29.9)×2

(36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

34.9(1 3/8) 34.9(1 3/8) 34.9(1 3/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

UX3 UX2+UX3+UX3

14 38

Ton

12 32

Model

Name

Combination Unit

ARUB145DTE4 ARUB384DTE4

Independent Unit

Combination only (Not for 1Unit)

ARUB096DTE4

ARUB145DTE4

Refrigerant Precharged Amount

kg 10.7 32.1

lbs 23.6 70.8

Number of maxmum connectable indoor units

23 61

Net Weight

(285 × 1) (245 x 1) + (285 x 2)

lbs

(628 × 1) (540 x 1) + (628 x 2)

Dimensions (WxHxD)

(1,240×1,680×760)×1 (1,240×1,680×760)×3

inch

(48.8×66.1×29.9)×1 (48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

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

Unit

UX3+UX3+UX3 UX3+UX3 UX3+UX3+UX3

34 34 36

Ton

28 28 30

Model

Name

Combination Unit

ARUB336DTE4 ARUB337DTE4 ARUB360DTE4

Independent Unit

ARUB144DTE4 ARUB168DTE4 ARUB144DTE4

ARUB096DTE4 ARUB168DTE4 ARUB121DTE4

ARUB096DTE4 ARUB096DTE4

Refrigerant Precharged Amount

32.1 21.4 32.1

lbs

70.8 47.2 70.8

Number of maxmum connectable indoor units

55 55 58

Net Weight

(245 × 2) + (285 × 1) (285 × 2) (245 × 2) + (285 × 1)

lbs

(540 × 2) + (628 × 1) (628 × 2) (540 × 2) + (628 × 1)

Dimensions (WxHxD)

(1,240×1,680×760)×3 (1,240×1,680×760)×2 (1,240×1,680×760)×3

inch

(48.8×66.1×29.9)×3 (48.8×66.1×29.9)×2 (48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

34.9(1 3/8) 34.9(1 3/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8) 28.58(1 1/8)

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

UX2+UX3+UX3 UX2+UX3+UX3

40 42

Ton

34 36

Model

Name

Combination Unit

ARUB408DTE4 ARUB432DTE4

Independent Unit

ARUB121DTE4 ARUB145DTE4

ARUB145DTE4 ARUB145DTE4

Refrigerant Precharged Amount

kg 32.1 32.1

lbs 70.8 70.8

Number of maxmum connectable indoor units

64 64

Net Weight

(245 x 1) + (285 x 2) (285 x 3)

lbs

(540 x 1) + (628 x 2) (628 x 3)

Dimensions (WxHxD)

(1,240×1,680×760)×3 (1,240×1,680×760)×3

inch

(48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

41.3(1 5/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8)

Unit

UX3 UX3+UX3+UX3

18 46

Ton

14 38

Model

Name

Combination Unit

ARUB169DTE4 ARUB456DTE4

Independent Unit

Combination only (Not for 1Unit) ARUB169DTE4

ARUB145DTE4

Refrigerant Precharged Amount

10.7 32.1

lbs

23.6 70.8

Number of maxmum connectable indoor units

29 64

Net Weight

(285 x 1) (285 x 3)

lbs

(628 x 1) (628 x 3)

Dimensions (WxHxD)

(1,240x1,680x760)x1 (1,240x1,680x760)x3

inch

(48.8x66.1x29.9)x1 (48.8x66.1x29.9)x3

Pipe Con-

nections

Liquid Pipes

mm(inch)

15.88(5/8) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

28.58(1 1/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

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

OUTDOOR UNITS INFORMATION

ENGLISH

Unit

UX3+UX3+UX3 UX3+UX3+UX3

48 50

Ton

40 42

Model

Name

Combination Unit

ARUB480DTE4 ARUB504DTE4

Independent Unit

ARUB169DTE4 ARUB169DTE4

ARUB145DTE4 ARUB169DTE4

Refrigerant Precharged Amount

32.1 32.1

lbs

70.8 70.8

Number of maxmum connectable indoor units

64 64

Net Weight

(285 x 3) (285 x 3)

lbs

(628 x 3) (628 x 3)

Dimensions (WxHxD)

(1,240x1,680x760)x3 (1,240x1,680x760)x3

inch

(48.8x66.1x29.9)x3 (48.8x66.1x29.9)x3

Pipe Con-

nections

Liquid Pipes

mm(inch)

19.05(3/4) 19.05(3/4)

Low Pressure Gas Pipes mm(inch)

41.3(1 5/8) 41.3(1 5/8)

High Pressure Gas Pipes mm(inch)

28.58(1 1/8) 28.58(1 1/8)

ALTERNATIVE REFRIGERANT R410A

ENGLISH

• The wall thickness of the piping should comply with the relevant local and national regula-

tions for the designed pressure 3.8Mpa(551.1psi).

• 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.

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 be also 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.

CAUTION

SELECT THE BEST LOCATION

ENGLISH

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 by noise from unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• With space for air passage and service work shown next

• Because of the possibility of fire, do not install unit to the space where generation, inflow, stag-

nation, and leakage of combustible gas is expected.

• 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 addi-

tionally performing defrost operation.

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

stalling the product at a place With a high humidity in winter (near beach, coast, lake, etc.)

(Ex : Rooftop where there is always sunshine.)

SELECT THE BEST LOCATION

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.

SELECT THE BEST LOCATION

ENGLISH

[Unit : mm(inch)]

Inspection door

(servicing space)

481(18-15/16)

345(13-19/32)

300(11-13/16)

450(17-23/32)

(Servicing space) (Servicing space)

(Servicing space)

453(17-27/32)

174(6-27/32)

218(8-19/32)

182(7-5/32)

419(16-1/2)

61(2-13/32)

137(5-13/32)

124(4-7/8)

128(5-1/32)

30(1-3/16)

450(17-23/32)

100(3-15/16) more

(Serviceing space)

100(3-15/16) more

(Serviceing space)

60(2-3/8)

No. Part Name

Description

PRHR031A/PRHR041A PRHR021A

Low pressure Gas pipe

connection port

Ø28.58(1-1/8) Brazing connection Ø22.2(7/8) Brazing connection

High pressure Gas pipe

connection port

Ø22.2(7/8) Brazing connection Ø19.05(3/4) Brazing connection

Liquid pipe connection

port

Ø15.88(5/8) Brazing connection

(PRHR041A)

Ø12.7(1/2) Brazing connection

(PRHR031A)

Ø9.52(3/8) Brazing connection

Indoor unit Gas pipe

connection port

Ø15.88(5/8) Brazing connection Ø15.88(5/8) Brazing connection

Indoor unit Liquid pipe

connection port

Ø9.52(3/8) Brazing connection Ø9.52(3/8) Brazing connection

Control box - -

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.

INSTALLATION SPACE

ENGLISH

Individual Installation

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

space as shown in the figures below.

Category Installation Space

Case 1

(10mm≤Side Space≤49mm)

Case 2

(Side Space≥49mm)

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≥300(11-13/16”)

C≥10(13/32”)

D≥500(19-11/16”)

E≥20(25/32”)

F≥600(23-5/8”)

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”)

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≥500(19-11/16”)

C≥50(1-31/32”)

B≥500(19-11/16”)

E≥100(3-15/16”)

F≥600(23-5/8”)

Only 2

sides are

walls

A≥10(13/32”)

B≥300(11-13/16”)

A≥200(7-7/8”)

B≥300(11-13/16”)

E≥400(15-3/4”)

Limita-

tions on

the height

of the wall

(Refer to 4

side walls)

front

A E

front front front

A E

front front

A E

front front

A E

front front

front

front front front

1500mm(59-1/16”)

240mm

(9-7/16”)

50mm(1-31/32”)

45° or

500mm

(19-11/16”)

• The height of the wall on the front side must be 1500mm(59-1/16") or less.

• The height of the wall on the inlet side must be 500mm(19-11/16") or less.

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

• If the height of the walls on the front and the inlet are higher than the limit, there

must be additional space on the front and the side.

- Additional Space on the inlet side by 1/2 of h1.

- Additional Space on the front side by 1/2 of h2

- h1 = B(Actual height) - 1500mm(19-11/16")

- h2 = A(Actual height) - 500mm(59-1/16")

INSTALLATION SPACE

ENGLISH

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow area or severe cold area 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 not to 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 50cm(1.64ft) 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 10cm, always

remove snow for operation.

- The height of H frame must be more than 2 times the snowfall and its width shall not ex-

ceed 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.

CAUTION

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than 20 kg(44lbs).

• 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 8m(26.2ft) 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.

• 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

ENGLISH

INSTALLATION

ENGLISH

The location of the Anchor bolts

• The outdoor unit supports at the bottom shall have width of at least 100mm(3-15/16 inch) under

the Unit’s legs before being fixed.

• The outdoor unit supports should nave minimum height of 200mm(7-7/8 inch).

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

At least 100mm

(3-15/16 inch)

At least 100m

(3-15/16

inch)

At least 100mm

(3-15/16 inch)

At least 100mm

(3-15/16 inch)

At least 100mm

(3-15/16 inch)

At least 100mm

(3-15/16 inch)

Center of the Unit

For outdoor units should not

be supported only by the

corner supports.

Center of the Unit

730(28-3/4)

760(29-29/32)

65(2-9/16)

Unit : mm(inch)

At least

65(2-9/16)

At least

65(2-9/16)

INSTALLATION

Chassis

Outdoor Unit Capacity

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

Ton HP

UX2 6Ton 8HP 920(36-7/32) 792(31-3/16)

UX3 8~14Ton 10~14,18HP 1240(48-13/16) 1102(42-3/8)

Foundation for Installation

• 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 200mm(7.87inch)).

At least

200 (7.87)

Unit : mm(inch)

200(7.87)

75(2.95)

100(3.94)

Ⓐ The corner part must be fixed firmly. Otherwise,

the support for the installation may be bent.

Ⓑ Get and use M10 Anchor bolt.

ground support for the vibration protection in wide

area.

Ⓓ Space for pipes and wiring (Pipes and wirings for

bottom side)

Ⓔ H-beam support

Ⓕ Concrete support

CAUTION

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

bottom side of the outdoor unit Base Pan before fix-

ing 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.

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 treat-

ment(treatment of the water flowing out of the outdoor unit in operation), and the pas-

sages of the pipe and wiring, when making the ground support.

• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water

outlet. The tube or pipe may freeze and the water may not be drained.

Pallet(Wood Support)

- Remove before Installation

INSTALLATION

ENGLISH

INSTALLATION

ENGLISH

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 pur-

chased locally.

- Measure the distance between the indoor

and the outdoor unit.

- Cut the pipes a little longer than measured

distance.

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

pipe length.

Burrs removal

- Completely remove all burrs from the cut

cross section of pipe/tube.

- Put the end of the copper tube/pipe to down-

ward direction as you remove burrs in order

to avoid to let burrs drop in the tubing.

Flaring work

- Carry out flaring work using flaring tool as

shown below.

Firmly hold copper tube in a bar(or die) as in-

dicated 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.

Copper

tube

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Preparation of Piping

Pipe diameter

Inch (mm)

A inch (mm)

Wing nut type Clutch type

Ø1/4 (Ø6.35)

0.04~0.07

(1.1~1.8)

0~0.02

(0~0.5)

Ø3/8 (Ø9.52)

Ø1/2 (Ø12.7)

Ø5/8 (Ø15.88)

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

N·m(lbs ·ft)

A [mm(inch)] flare shape

Ø9.52(3/8) 38±4(28±3.0) 12.8(0.5)~13.2(0.52)

R=0.4~0.8

Ø12.7(1/2) 55±6(41±4.4) 16.2(0.64)~16.6(0.65)

Ø15.88(5/8) 75±7(55±5.2) 19.3(0.76)~19.7(0.78)

CAUTION

• 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.

Union

INSTALLATION

ENGLISH

INSTALLATION

ENGLISH

Insulation of shutoff valve

1 Use the heat insulation material for the refrigerant piping which has an excellent heat-resis-

tance (over 248°F).

2 Precautions in high humidity circumstance:

This air conditioner has been tested according to the "ISO Conditions with Mist" and con-

firmed that there is not any default. However, if it is operated for a long time in high humid at-

mosphere (dew point temperature: more than 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

248°F the heat-resistance temperature.

- Add the insulation over 10mm(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 pip-

ing attached

to unit

Closed Opened

Hexagonal

wrench

Ø6.35(1/4)

6.0 ±0.6

(4.4±0.4)

5.0 ±0.0

(3.7±0.4)

4mm

(0.16inch)

17.6±2.0

(13.0±1.5)

12.7±2

(9.4±1.5)

16±2(12±1.5)

Ø9.52(3/8) 38±4(28±3.0)

Ø12.7(1/2)

10.0 ±1.0

(7.4±0.7)

20.0±2.0

(14.8±1.5)

55±6(41±4.4)

Ø15.88(5/8)

12.0 ±1.2

(8.9±0.9)

5mm

(0.24inch)

25.0±2.5

(18.4±1.8)

75±7 (55±5.1)

Ø19.05(3/4)

14.0 ±1.4

(10.3±1.0)

110±10

(81.1±7.4)

Ø22.2(7/8)

30.0 ±3.0

(22.1±2.2)

8mm

(0.31inch)

25±3.0

(18.5±2.2)

Ø25.4(1.0)

INSTALLATION

ENGLISH

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.

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 insulation 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

Counter

measure

- 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.

INSTALLATION

ENGLISH

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.

1 Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas):

Please use the following nitrogen pressure Pressure 0.02Mpa (2.9psi) less

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.

2 Always use a pressure reducing valve.

3. 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

Regulator

Nitrogen gas Pressure

0.02Mpa (2.9psi) 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 o

ccurred and it is a leakage cause.

Oxide scale

Nitrogen

REFRIGERANT PIPING INSTALLATION

ENGLISH

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 and HR 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.

Low Pressure Gas pipe

Service Port

Liquid pipe

High Pressure Gas pipe

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.)

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.

REFRIGERANT PIPING INSTALLATION

CAUTION

REFRIGERANT PIPING INSTALLATION

ENGLISH

Connection of Outdoor units

(Unit : mm(inch))

2 Unit

3 Unit

ARCNB21

ARCNB31

Outdoor units Model

Low Pressure Gas Pipe

High Pressure Gas PipeLiquid Pipe

O.D25.4(1)

I.D22.2(7/8)

I.D19.05(3/4)

120(4-23/32)

O.D19.05(3/4)

I.D15.88(5/8)

I.D12.7(1/2)

110(4-11/32)

O.D25.4(1)

I.D22.2(7/8)

80(3-5/32)

O.D12.7(1/2)

I.D9.52(3/8)

70(2-3/4)

453(17-27/32)

491(19-9/32)

111

(4-3/8)

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

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

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

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

I.D25.4(1)

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

I.D25.4(1)

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

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

130(5-1/8)

416(16-3/8)

408(16-1/16)

111(4-3/8)

I.D.38.1(1-1/2)

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

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

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

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

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

I.D.22.2(7/8)

331(13-1/32)

314(12-3/8)

O.D.19.05(3/4)

I.D.19.05(3/4)

I.D.15.88(5/8)

I.D.22.2(7/8)

I.D.12.7(1/2)

I.D.9.52(3/8)

70(2-3/4)

83(3-9/32)

O.D.19.05(3/4)

I.D.15.88(5/8)

I.D.22.2(7/8)

I.D.12.7(1/2)

334(13-5/32)

281(11-1/16)

83(3-9/32)

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

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

125(4-29/32)

406(16)

353(13-29/32)

111(4-3/8)

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

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

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

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

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

471(18-17/32)

517(20-11/32)

125(4-29/32)

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.D19.05

(3/4)

I.D22.2(7/8)

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

120(4-23/32)

I.D19.05

(3/4)

I.D22.2(7/8)

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

120(4-23/32)

O.D15.88(5/8) I.D9.52(3/8)

I.D12.7(1/2)

110(4-11/32)

O.D12.7(1/2)

I.D6.35(1/4)

I.D9.52(3/8)

110(4-11/32)

O.D.19.05(3/4)

I.D.12.7(1/2)

I.D.15.88(5/8)

110(4-11/32)

130(5-1/8)

I.D12.7(1/2)

I.D19.05

(3/4)

I.D22.2(7/8)

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

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

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

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

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

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

O.D15.88(5/8)

90(3-17/32)

70(2-3/4)

120(4-23/32)

I.D19.05(3/4)

I.D15.88(5/8)

O.D22.2(7/8)

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

I.D22.2(7/8)

Y branch

To outdoor unit

To branch piping or indoor unit

Facing

upwards

Facing

downwards

Within ± 3° Within ± 3°

Viewed from point A

in direction of arrow

Within +/- 10°

For more information, refer accessory installation manual.

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 hang-

ing bolt as shown in the figure in the bottom, and fit the main unit to

hang on the hanger metal.

3 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

REFRIGERANT PIPING INSTALLATION

ENGLISH

Installation of Outdoor Unit, HR Unit and Indoor Unit Refriger-

ant Pipe

3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pres-

sure 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.

Gas pipe

Liquid pipe

HR Unit

Low pressure

Gas pipe

Liquid pipe

High pressure

Gas pipe

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

Gas pipe Ø15.88 (5/8)

Liquid pipe Ø9.52 (3/8)

Brazing Type

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

(Brazing Type)

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.

REFRIGERANT PIPING INSTALLATION

ENGLISH

Type of HR Unit

Select an HR unit according to the number of the indoor units to be installed. HR units are classi-

fied 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.

Type of HR Unit

Select an HR unit according to the number of the indoor units to be installed. HR units are classi-

fied 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.

PRHR031A(3 branches)PRHR021A(2 branches) PRHR041A(4 branches)

HR Unit 2

HR Unit

1 2 3 4

(96k) (28k)

1 2 3 4

(76k)(21k)

Joint Method of HR Unit (Big Duct : ARNU763B8-, ARNU963B8-)

Joint Method is required when B5/B8 chassis is installed. In Joint Method, two neighboring out-

lets of one HR unit are linked by Y branch pipe and connected to one indoor unit.

Gas pipe Ø15.88 (5/8)

Liquid pipe Ø9.52 (3/8)

Brazing Type

Remove caps on

The brazing part.

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

Unit : mm(inch)

HR unit PRHR021A PRHR031A PRHR041A

Low pressure gas pipe Ø22.2(7/8) Ø28.58(1-1/8) Ø28.58(1-1/8)

High pressure gas pipe Ø19.05(3/4) Ø22.2(7/8) Ø22.2(7/8)

Liquid pipe Ø9.52(3/8) Ø12.7(1/2) Ø15.88(5/8)

REFRIGERANT PIPING INSTALLATION

ENGLISH

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)

WARNING

• A branch pipe of HR unit allows up to 14.5kW(48kBtu/h) based on cooling capacity of the

indoor unit. (up to 14.5kW(48kBtu/h) for max installation)

• The maximum total capacity of indoor units connected to a PRHR041 HR unit is

58kW(192kBtu/h).

• The maximum number of indoor units connected to a PRHR041 HR 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.

REFRIGERANT PIPING INSTALLATION

ENGLISH

[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

PRHR021A

OD22.2(7/8) Ø19.05(3/4) Ø15.88(5/8)

OD15.88(5/8) Ø

12.7(1/2)

Ø6.35(1/4)OD9.52(3/8)

OD19.05(3/4) Ø15.88(5/8)

OD12.7(1/2) Ø9.52(3/8)

Ø12.7(1/2)

OD22.2(7/8) Ø19.05(3/4) Ø15.88(5/8)

OD15.88(5/8) Ø12.7(1/2)

PRHR031A/

PRHR041A

OD19.05(3/4) Ø15.88(5/8)

OD28.58(1-1/8) Ø22.2(7/8) Ø19.05(3/4)

OD15.88(5/8) Ø12.7(1/2) Ø9.52(3/8)

OD15.88(5/8) Ø12.7(1/2)

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

- Pipe connections can be done on the front side or on the side according to the installation envi-

ronments.

- Be sure to let 0.2kgf/cm

(0.284lbs/in

) 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

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Removal Area for Liquid/Gas pipe

bottom side connections.

CAUTION

• 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.

PIPE CONNECTIONS BETWEEN INDOOR AND

OUTDOOR UNIT

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

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

Leakage Prevention Cap

Low Pressure Gas pipe

Service Port

Liquid pipe

High Pressure Gas pipe

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.

Pipe Knock Out

for High Pressure

Gas pipe

Pipe Knock Out for

Liquid/Gas pipes

80mm

(3.15in)

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Method of drawing out pipes on the bottom side

- Drawing out common pipe through side panel

Liquid pipe

Low Pressure Gas pipe

High Pressure

Gas pipe

Remove pipe knock out

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Refrigerant piping system

Refrigerant Pipe Connection

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

sealing

"a"

"b"

Master

Slave 1

Slave 2

■ Case 1 ("a")

: Maximum height is 15m(49ft) if you install with Y branch.

■ Case 2 ("b")

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

ODU Capacity

Master ≥ Slave1 ≥ Slave 2

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

• * : Assume equivalent pipe length of Y branch to be 1.64ft, that of header to be 3.3ft,

calculation purpose

• it is recommended that indoor unit is installed at lower position than the header.

• ** : Conditional application

Longest pipe length *Equivalent pipe length

A+B+C3+k ≤150m(200m**)

[(492ft(656ft**)]

A+B+C3+k ≤175m(225m**)

[(574ft(738ft**)]

Longest pipe length after 1st branch

B+C+D+e ≤ 40m(90m**) [131ft(295ft)]

Difference in height (Outdoor Unit ÷ Indoor Unit)

H ≤ 110m(361ft)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 40m(131ft)

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m(16.4ft)

"a", "b"

Difference in height(HR unit ÷ HR unit)

a ≤ 15m(49ft) , b ≤ 5m(16ft)

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 ≤ 10m(33ft), equivalent length : max

13m(43ft) (for 14HP or more)

* If the large capacity indoor units (Over 5 HP; using over Ø15.88(5/8)/9.52(3/8) are installed,

it should be used the Valve Group setting

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Downward indoor unit total

capacity [kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe [mm(inch)]

Low pressure High pressure

≤ 5.6(19,100)

Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8)

< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2)

≤ 22.4(76,400)

Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)

< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)

< 50.4(229,000) Ø12.7(1/2) Ø28.58(1-1/8) Ø22.2(7/8)

< 67.2(229,400) Ø15.88(5/8) Ø28.58(1-1/8) Ø22.2(7/8)

< 72.8(210,600) Ø15.88(5/8) Ø34.9(1-3/8) Ø28.58(1-1/8)

< 100.8(344,000) Ø19.05(3/4) Ø34.9(1-3/8) Ø28.58(1-1/8)

< 173.6(592,500) Ø19.05(3/4) Ø41.3(1-5/8) Ø34.9(1-3/8)

Total pipe length = A+B+C1+C2+C3+a+b+c+d+e+f+g+i+j+k+l+m+n ≤ 1,000m(3,280ft)

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

• * : ARUB145

TE4(14HP, 12Ton), ** : ARUB169

TE4(18HP, 14Ton)

• If available on site, it use this size. Otherwise it can't be increased.

WARNING

When the equivalent length between a outdoor and the farthest indoor unit

is 90m(295ft) or more, main pipe(A) must be increased one grade.

(**) Conditional Application(Incase of D12 is the farthest indoor)

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

1) 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)

Ø6.35(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.

2) 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 ≤

1,000m(3,280ft)

3) Length of pipe from each indoor unit to the closest HR Unit (a,b,c,d,e,e,g,i,j,k,l,m,n) ≤

40m(131ft)

4) [Length of pipe from outdoor unit to the farthest indoor unit D12 (B+C3+K)]

- [Length of pipe outdoor unit to the closest indoor unit D1 (C1+a)] ≤ 40m(131ft)

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

Upward doutdoor

unti total capacity

pipe diameter

pipe diameter when pipe length

is 90m over to 1st branch

Hp Ton

Liquid

mm(inch)

Low pressure

gas pipe

mm(inch)

High pressure-

gas pipe

mm(inch)

Liquid

mm(inch)

Low pressure

gas pipe

mm(inch)

High pressure

gas pipe

mm(inch)

Ø9.52(3/8)

Ø19.05(3/4) Ø15.88(5/8)

Ø12.7(1/2)

Ø22.2(7/8) Ø19.05(3/4)

10 8 Ø22.2(7/8)

Ø19.05(3/4)

Ø25.4(1)

Ø22.2(7/8)

12 10

Ø12.7(1/2)

Ø28.58(1-1/8)

Ø15.88(5/8)

Ø31.8(1-1/4)

14 12

Ø22.2(7/8) Ø25.4(1)

*14,18

**18

*12,14

**14

Ø15.88(5/8) Ø19.05(3/4)

20 16

22 18

Ø28.58(1-1/8) Ø31.8(1-1/4)

24 20

Ø34.9(1-3/8) Ø38.1(1-1/2)

26 22

Ø19.05(3/4) Ø22.2(7/8)

28 24

32 26

34 28

36~50 30~42 Ø41.3(1-5/8) Ø44.5(1-3/4)

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Y branch, Header and HR unit connection pattern

Pattern 1 Pattern 2

Pattern 3

Pattern 5

HR1

48k 48k

234567

HR2

48k 48k

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

3 4

HR1

48k 48k 48k 48k

1 2 3 4

Pattern 4

12k 12k 12k 12k

1 2 3 4

HR1

48k

24k 24k 24k

12k 12k

48k

1 2

HR2

48k 48k

3 4

Pattern 6

• The maximum total capacity of indoor

units is 58kW(192 kBtu/h).

• The maximum total capacity of a branch

pipe of HR unit is 14.5kW(48 kBtu/h).

• Impossible installation : Head branch pipe HR unit

• Impossible installation : HR unit Head branch

pipe Y and Head branch pipe.

HR1

12 345

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Pattern 7

Pattern 8

HR1

48k 48k

1 2

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

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

HR2

48k 48k

3 4

HR3

48k 48k

5 6

HR1

48k 48k

1 2

HR2

12k 12k 12k 12k

3 4 5 6

24k

• 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

es(Gas

e, Liquid

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

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

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

1) under 40m(131ft)

Keep the sum of indoor capacity under 58kW(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 40m(131ft)

Y branch

5m(16ft)

15m(49ft)

Keep the sum of indoor capacity under 58kW(192 kBtu/h).

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Outdoor unit Connection

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)

Ø6.35(1/4) Ø12.7(1/2)

< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)

< 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

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 130% is connected to 20Ton(24HP(70kW)) outdoor unit.

1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8, gas pipe), Ø15.88(5/8, liquid pipe)

2) Pipe diameter B after first branch according to 130% indoor unit combination(91kW): Ø34.9(1-

3/8, gas pipe), Ø19.05(3/4, liquid pipe)

Therefore, pipe diameter B connected after first branch would be Ø34.9(1-3/8, gas pipe) /

Ø15.88(5/8, liquid pipe) which is same with main pipe diameter.

[Example]

nstead of using indoor unit total capacity, use outdoor unit model name in order to choose main pipe di-

ameter 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 20Ton(24HP(70kW))outdoor unit to 130% of its system ca-

pacity (91 kW) and branching 7k Btu/h(2.2kW) indoor unit at the 1st branch

1) Main pipe diameter 20Ton(24 HP) outdoor unit: Ø28.58(1-1/8, Gas pipe) Ø15.88(5/8, Liquid pipe)

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

Ø34.9(1-3/8, Gas pipe) Ø19.05(3/4, Liquid pipe) in conformity with downward indoor units.

2) Since the main pipe diameter of 20Ton(24 HP) outdoor unit is Ø28.58(1-1/8, Gas pipe) and

Ø15.88(5/8, Liquid pipe), Ø28.58 (1-1/8, Gas pipe) and Ø15.88(5/8, Liquid pipe) is used as the main

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

CAUTION

• Bending radius should be at least twice the

diameter of the pipe.

• Bend pipe after 500mm(1.64ft) or more

from branch(or header).

Do not bend U type.

It may cause Performance unsatisfactory or

noise.

500mm(1.64ft)

or more

500mm(1.64ft)

or more

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Pipe Connection Method/Precautions for

Series connections between Outdoor units

- Separate Y branch joints are needed for series connections between outdoor units.

- Please refer to the below connection examples to install pipe connections between outdoor

units.

- If the distance between the outdoor units becomes more than 2m(6.6ft), apply Oil Traps be-

tween the gas pipes.

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

Pipe connection between outdoor units (General Case)



The maximum pipe length

after the ﬁrst branching

between the outdoor units is

10m(33ft) or less

Pipes between outdoor units are 2m(6.6ft) or

less

Examples of Wrong Pipe Connections

2m(6.6)ft or less

Pipes between outdoor units are 2m(6.6ft) or

longer

Oil Trap

Oil Trap Oil Trap

2m(6.6ft) or less

0.2m(0.66ft) or more

2m(6.6ft) or longer

2m(6.6ft) or longer2m(6.6ft) or longer

If the main pipe is

higher than the

outdoor units, oil is

accumulated in the

outdoor unit.

If there are differences in the height

between the outdoor units, oil is

accumulated in the lower outdoor unit.

Oil Trap

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

- 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 prop-

erly.

- Apply Oil Trap as shown below when the length of the pipe between the outdoor units is more

than 2m(6.6ft). Otherwise, the unit may not operate properly.

Toward indoor unit

Pipe inclination (2 or more)

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

(Example 1)

(Example 2)

Toward indoor unit

2m(6.6ft)

0.2m(0.66ft)

Oil Trap

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

- When connecting the pipes between the outdoor units, the accumulation of oil in the slave out-

door unit should be avoided. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

0.2m(0.66ft)

Toward indoor unit Toward indoor unit

Oil Trap

Toward indoor unit

(Example 3)

(Example 2)

* The level difference between two outdoor units, h is allowed up to 5m(16.4ft).

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

The amount of Refrigerant

The calculation of the additional charge should take into account the length of pipe and CF(correc-

tion Factor) value of indoor unit.

Additional charge(kg) = Total liquid pipe : Ø25.4 mm (1.0 inch) x 0.480kg/m(0.323(lbs/ft))

+ Total liquid pipe : Ø22.2 mm (7/8 inch) x 0.354kg/m(0.238(lbs/ft))

+ Total liquid pipe : Ø19.05 mm (3/4 inch) x 0.266kg/m(0.179(lbs/ft))

+ Total liquid pipe : Ø15.88 mm (5/8 inch) x 0.173kg/m(0.116(lbs/ft))

+ Total liquid pipe : Ø12.7 mm (1/2 inch) x 0.118kg/m(0.079(lbs/ft))

+ Total liquid pipe : Ø9.52 mm (3/8 inch) x 0.061kg/m(0.041(lbs/ft))

+ Total liquid pipe : Ø6.35 mm (1/4 inch) x 0.022kg/m(0.015(lbs/ft))

+ Number of installed HR unit x 5kg(1.1lbs)

+ CF value of indoor unit

Amount refrigerant of Indoor units

Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed Duct 7.3kW-2ea,

Wall Mounted 2.3kW-4ea

CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12kg (4.67lbs)

Attach the additional refrigerant table of IDU.

CAUTION

Use only 2-series of indoor unit. Ex) ARNU***2/A

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

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 2m(6.56ft) 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

Liquid pipe

Low Pressure

Gas pipe

High Pressure

Gas pipe

Ⓐ Manifold Gauge

Ⓑ Low pressure side Handle

Total amount of refrigerant in the system

≤ 0.44(kg/m

(0.028(lbs/ft

))

Volume of the room at which Indoor Unit of the least capacity is installed

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.

• The total amount of refrigerant can be added up to 15%.

Refrigerant charging

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Y branch

Header

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.

Ⓐ To Outdoor Unit Ⓑ To Indoor Unit

• The indoor unit having larger capacity must be in-

stalled 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.

Branch pipe Fitting

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

• 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.

• Fit branch pipe lie in a horizontal plane.

• 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.

Pinched pipe

Horizontal plane

View from point B in the direction of the arrow

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

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Y branch pipe

Models Gas pipe Liquid pipe

ARBLN01621

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)

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)

ARBLN03321

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)

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

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)

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

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)

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)

ARBLN23220

O.D.

28.58(1-1/8)

I.D.

22.2(7/8)

115(4-17/32)

100(4-11/32)

O.D15.88(5/8)

I.D12.7(1/2)

70(2-3/4)

O.D.

22.2(7/8)

I.D.

15.88(5/8)

I.D.

19.05(3/4)

120(4-23/32)

O.D.38.1(1-1/2)

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

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

O.D.44.48(1-3/4)

175(6-7/8)

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

I.D.53.98(2-1/4t I.D.

25.4(1)

I.D.44.48(1-3/4)

I.D38.1(1-1/2)I.D41.3(1-5/8)

I.D.44.48(1-3/4)

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

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

I.D.53.98(2-1/4)

420(16-17/32)

490(19-9/32)

134

3 3

O.D.

19.05(3/4)

O.12.7(1/2)

I.D.15.88(5/8)

O.12.7(1/2) .D6.35(1/4)

I.D9.52(3/8)

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

I.D25.4(1) I.D.

22.2(7/8)

I.D.

19.05(3/4)

I.D.

19.05(3/4)

I.D.

22.2(7/8)

I.D.

25.4(1)

I.D.

25.4(1)

I.D.

22.2(7/8)

346(13-5/8)

379(14-29/32)

96(3-25/32)

3 32

[Unit:mm(inch)]

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Header

Models Gas pipe Liquid pipe

4 branch

ARBL054

360(14-5/32)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

150

(5-29/32)

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

120(4-23/32)

360(14-5/32)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

150

(5-29/32)

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

7 branch

ARBL057

540(21-1/4)

150

(5-29/32

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

540(21-1/4)

32)

150

(5-29/32)

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

4 branch

ARBL104

150

(5-29/32)

400(15-23/32)

160(6-5/16)

ID15.88(5/8)ID15.88(5/8)

ID12.7(1/2)ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID19.05(3/4)

ID15.88(5/8)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

150

(5-29/32)

120(4-23/32)

120

(4-23/32)

360(14-5/32)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

7 branch

ARBL107

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

160(6-5/16)

580(22-27/32)

ID19.05(3/4)

ID15.88(5/8)

ID15.88(5/8)ID15.88(5/8)

ID12.7(1/2)ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

150

(5-29/3

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

700(27-9/16)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID9.52(3/8)ID9.52(3/8)

ID6.35(1/4)ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

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

ID9.52(3/8)

ID6.35(1/4)

150

(5-29/32)

32)

10 branch

ARBL1010

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

120

(4-23/32)

160(6-5/16)

760(29-28/32)

ID19.05(3/4)

ID15.88(5/8)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

150

(5-29/32)

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

120(4-23/32)

720(28-11/32)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

150

(5-29/32)

10 branch

ARBL2010

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

120

(4-23/32)

182(7-5/32)

775(30-17/32)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID28.58(1-1/8)

ID31.8(1-1/4)

ID34.9(1-3/8)

150

(5-29/32)

ID15.88(5/8)

ID12.7(1/2)

120

(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID9.52(3/8)

ID6.35(1/4)

107(4-7/32)

60*9=540(21-1/2)

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)

ID9.52(3/8)

ID6.35(1/4)

150

(5-29/32)

[Unit:mm(inch)]

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Leak test

Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(551.1psi). If the pressure does

not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitro-

gen 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/low pressure common 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.

Indoor unit

Nitrogen gas

cylinder

Nitrogen gas

cylinder

Slave 1 outdoor unit Master outdoor unit

High Pressure

Gas pipe

High Pressure

Gas pipe

Liquide pipe

Low Pressure

Gas pipe

Low Pressure

Gas pipe

Liquid side

Gas side

HR unit

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 0.01Mpa(1.5psi) for each 33.8°F 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 3.8MPa(551psi) is 80.6°F

24 hour later: 3.73MPa(541psi), 68°F

In this case the pressure drop of 0.07MPa(10psi) is because of temperature drop

And hence there is no leakage in pipe occurred.

CAUTION

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.

WARNING

Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not com-

press air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explo-

sion.

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

Leak Test and Vacuum drying

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

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 -100.7kPa (-14.6psi, 5 Torr, -755mmHg).

- Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the

system to -100.7kPa(-14.6psi). 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 0.05MPa(7.3psi) (vacuum

break) with nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(-

14.6psi)(vacuum drying). If the system cannot be evacuated to -100.7kPa(-14.6psi) within 2 hrs, re-

peat 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.

Scale

Use a graviometer. (One that can measure

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

to prepare such a high-precision

gravimeter you may use a charge cylinder.

Indoor unit

Slave 1 outdoor unit Master outdoor unit

Liquide pipe

High Pressure

Gas pipe

High Pressure

Gas pipe

Liquide pipe

Low Pressure

Gas pipe

Low Pressure

Gas pipe

Liquid side

Gas side

Vacuum

pump

Vacuum

pump

HR unit

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

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.

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.

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

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

Vacuum mode off method

CAUTION

ODU operation stops during vacuum mode. Compressor can't operate.

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 V/V open

ODU EEV open

IDU EEV open

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

Vacuum Mode

DIP SWITCH 7-Segment

SW01C ( : conﬁrm)

SW02C ( : backward)

: forward)

SW04C

( X : cancel)

SW01D (reset)

SW03C (

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

ENGLISH

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe sepa-

rately 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 insula-

tion work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to in-

sulation work to ceiling plenum.

Ⓐ Heat insulation material

Ⓑ Pipe

and cutting part of heat insulation material

with a finishing tape.)

Penetrations

Heat insulation

material

Adhesive + Heat - resistant poly-

ethylene foam + Adhesive tape

Outer

covering

Indoor Vinyl tape

Floor ex-

posed

Water-proof hemp cloth +

Bronze asphalt

Outdoor

Water-proof hemp cloth +

Zinc plate + Oily paint

NOTE

When using polyethylene cover as cover-

ing material, asphalt roofing shall not be

required.

Bad

example

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

pressurepipe together.

Liquid pipe

Gas pipe

Power cables

Finishing tape

Insulating material

Communication cables

• Be sure to fully insulate connecting portion.

These parts are not insulated.

Good

example

Liquid pipe

Communication cables

Separ

-ation

Gas pipe

Power cables

Insulating material

Power cables

Ⓐ 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 mate-

rials for both insulation and covering.

(Vinyl covering should not be used.)

(3.28ft)

Inner wall (concealed)

Floor (ﬁreprooﬁng)

Penetrating portion on ﬁre

limit and boundary wall

Roof pipe shaft

Outer wall Outer wall (exposed)

Thermal insulation of refrigerant piping

ELECTRICAL WIRING

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 af-

fected 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 2-core shield cable for communication cable.(O mark in the figure below) If communication

cable of different systems are wired with the same multiplecore cable, the resultant poor trans-

mitting 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.

CAUTION

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.

2-Core Shield Cable Multi-Core Cable

Remote

control

Remote

control

Remote

control

Remote

control

Indoor

Unit

Outdoor Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Outdoor Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

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

ENGLISH

2-Core Shield Cable Multi-Core Cable

Master Slave1 Slave2

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Outdoor Unit

Remote

controller

Indoor

Unit

Indoor

Unit

Master Slave1 Slave2

Outdoor Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Master Slave1 Slave2

Outdoor Unit

CAUTION

• Use the 2-core shield cables 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 deteri-

orate power factor improvement effect, but also may cause capacitor abnormal heating. There-

fore, never install a phase leading capacitor.

• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifes-

pan will be reduced.

Precautions when laying power and ground wiring

Use round pressure terminals for connections to the power terminal block.

When laying ground wiring, you must use round pressure terminals.

Round pressure terminal

Power wire (Ground wire)

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.

ELECTRICAL WIRING

ENGLISH

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 sub 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.

[Heat pump]

UX3

UX2

Front Panel

WARNING

The temperature sensor for outdoor air should not be exposed to direct sunlight.

- Provide an appropriate cover to intercept direct sunlight.

Main PCB

Noise Filter

External PCB

Take care of the phase

sequence of 3-phase 3-wire

power system

ELECTRICAL WIRING

ENGLISH

Communication and Power Cables

Communication cable

- Types : shielding cable

- Cross section : 1.0~1.5mm

(1.55 x 10

-3

~2.32 x 10

-3

)

- Maximum allowable temperature: 140°F

- Maximum allowable cable length: under 1000m(3,281ft)

Remote control cable

- Types : 3-core cable

Central control cable

Separation of communication and power cables

- If communication and power cables are run alongside each other then there is a strong likeli-

hood of operational faults developing due to interference in the signal wiring caused by electro-

static 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

NOTE

• The figures are based on assumed length of parallel cabling up to 100m(328ft). For length

in excess of 100m(328ft) 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 ac-

count 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.

Product type Cable type Diameter

ACP&AC Manager 2-core cable (Shielding cable)

1.0~1.5mm

(1.55 x 10

-3

~2.32 x 10

-3

)

AC Smart 2-core cable (Shielding cable)

1.0~1.5mm

(1.55 x 10

-3

~2.32 x 10

-3

)

Simple central controller 4-core cable (Shielding cable)

1.0~1.5mm

(1.55 x 10

-3

~2.32 x 10

-3

)

Current capacity of power cable Spacing

100V or more

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

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

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

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

CAUTION

If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing of

the apparatus must be carried out by a qualified person.

ELECTRICAL WIRING

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 polychloro-

prene sheathed flexible cord.

- Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately

from the power supply.

CAUTION

• 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.

WARNING

• Follow ordinance of your governmental organization for technical standard related to elec-

trical 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 gener-

ated overcurrent may include some amount of direct current.

ELECTRICAL WIRING

ENGLISH

Field Wiring

208/230V

Example Connection of Communication Cable

1 Outdoor Unit-3Ø, 208/230V

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

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

(Main Switch)

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

HR unit

L(L1) N(L2)

RST

Between Indoor and Master 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

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 connec-

tion 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.

ELECTRICAL WIRING

ENGLISH

2 Outdoor Units-3Ø, 208/230V

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

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

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

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

(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)

RST RST

NOTE

- Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applica-

ble 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

ELECTRICAL WIRING

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 connec-

tion 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.

ELECTRICAL WIRING

ENGLISH

3 Outdoor Units-3Ø, 208/230V

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

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

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

(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)

RST

RST RST RST

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 applica-

ble 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

ELECTRICAL WIRING

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 connec-

tion 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.

ELECTRICAL WIRING

ENGLISH

460V

Example Connection of Communication Cable

1 Outdoor Unit-3Ø, 460V

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 connec-

tion 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

60Hz 460V

Power supply

1 Phase 60Hz

208/230V

(Main Switch)

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

HR unit

L(L1) N(L2)

RST

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

HR unit

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

ELECTRICAL WIRING

ENGLISH

2 Outdoor Units-3Ø, 460V

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)

[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

60Hz 460V

Power supply

1 Phase 60Hz

208/230V

Switch

ELCB

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

60Hz 460V

Power supply

1 Phase 60Hz

208/230V

(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)

RST

RST RST

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 applica-

ble 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

ELECTRICAL WIRING

ENGLISH

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 connec-

tion 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.

ELECTRICAL WIRING

ENGLISH

3 Outdoor Units-3Ø, 460V

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)

HR unit

Switch

ELCB

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

60Hz 460V

Power supply

1 Phase 60Hz

208/230V

Power supply

3 Phase 3 Wires

60Hz 460V

Power supply

1 Phase 60Hz

208/230V

(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)

RST

RST RST RST

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 applica-

ble 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

ELECTRICAL WIRING

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 connec-

tion 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.

ELECTRICAL WIRING

ENGLISH

Example) Connection of transmission wire

[BUS type]

- Connection of communication cable must be installed like below figure between indoor unit to

outdoor unit.

MMMMMMM

[STAR type]

- Abnormal operation can be caused by communication defect, when connection of communica-

tion cable is installed like below figure(STAR type).

ENGLISH

ELECTRICAL WIRING

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.

Example) Connection of power and communication cable (UX2)

Main power

terminal block

Ground wire

Power/

Ground cable

Over

50mm(1.97”)

gap

Communication

cable

Main power

terminal block

Ground wire

Power/

Ground cable

Over

50mm(1.97”)

gap

Communication

cable

Main power

terminal block

Ground wire

Power/

Ground cable

Over

50mm(1.97”)

gap

Communication cable

Fix ﬁrmly not

to be displaced

Main power

terminal block

Insulation sleeves

attachments

ODU-IDU

Communication cable

ODU-ODU

Communication cable

Main power

terminal block

Ground wire

Power/Ground cable

Over

50mm(1.97”) gap

Communication

cable

Left Side Right Side

Front Side 1 Front Side 2

Main Power Connection Communication Connection

ENGLISH

ELECTRICAL WIRING

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.

Example) Connection of power and communication cable (UX3)

Main power

terminal block

Ground wire

Power/

Ground cable

Over 50mm

(1.97”)gap

Communication

cable

wer

Main power

terminal block

Ground wire

Power/

Ground cable

Over 50mm

(1.97”)gap

Communication

cable

wer

Main power

terminal block

Ground wire

Power/

Ground cable

Over 50mm

(1.97”)gap

Communication cable

Main power

terminal block

Insulation sleeves

attachments

Fix ﬁrmly not

to be displaced

ODU-IDU

Communication cable

ODU-ODU

Communication cable

wer

Main power

terminal block

Ground wire

Power/Ground cable

Over

50mm (1.97”)gap

Communication

cable

Left Side Right Side

Front Side 1 Front Side 2

Main Power Connection Communication Connection

ENGLISH

ELECTRICAL WIRING

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. (For example, represents R410A 36HP)

• Initial display order • Example) ARUB360BTE4

• Master Unit • Slave Unit

Dip switch setting Dip switch setting ODU Setting

Slave 1

Slave 2

Order No Mean

①

8~18

Master model capacity(HP)

②

8~14

Slave 1 model capacity(HP)

③

8~14

Slave 2 model capacity(HP)

④

8~36

Total capacity(HP)

⑤

1 Cooling Only

2 Heat Pump

3 Heat Recovery

⑥

38 380V model

46 460V model

22 220V model

⑦

1 Full function

2 Core function

① ② ③ ④ ⑤ ⑥ ⑦

14 12 10 36 3 22 1

HR UNIT PCB

ENGLISH

HR UNIT PCB

SW02M

(Dip switch for setup of

the function of HR unit)

SW03M SW04M

SW01M/SW03M/SW04M

(Switch for manual valve

addressing)

SW01M

SW05M

(Switch for

addressing

HR unit)

7-SEG

#1 valve housing

#1 cooling valve

LED(green)

#4 valve housing

Switch for setup of HR Unit

1 Main function of SW02M

ON S/W Selection

No.1 Method for pipe detection 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”)

SW02M

1) Selection of the method for pipe detection of an HR unit (Auto/Manual)

Auto Manual

Switch No.1 OnSwitch No.1 Off

2) Setting the zoning control

DIP S/W setting

Normal

control

SW01M

Zoning

control

SW01M

Turn the dip switch of the zoning

branch on.

EX) Branch 1,2 are zoning control.

HR UNIT PCB

ENGLISH

3) Selection of the model of the HR unit

(For 2 branches)

PRHR021A

(For 3 branches)

PRHR031A

(For 4 branches)

PRHR041A

Initial

Setting

1 branches

Connected

2 branches

Connected

3 branches

Connected

4 branches

Connected

* Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory.

CAUTION

• If you want to use a PRHR031A 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 PRHR041A 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 PRHR041A 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.

HR UNIT PCB

ENGLISH

4) Setting the Valve Group.

No.1, 2 Valve

No.3, 4 Valve

Control

No.3, 4 Valve

Control

DIP S/W setting

No.2, 3 Valve

Control

No.1, 2 Valve

Control

Not control

Example

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

NOTE

If the large capacity indoor units are installed, below Y branch pipe should be used

Y branch pipe

Models

ARBLB03321

413(16-1/4)

390(15-11/32)

I.D19.05(3/4)

I.D15.88(5/8)

I.D12.7(1/2)

I.D12.7

(1/2)

(2-29/32)

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) 110(4-11/32)

332(13-1/16)

321(12-5/8)

(3-9/32)

I.D19.05(3/4)

O.D19.05(3/4)

3 2

1 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.D6.35(1/4)

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

I.D19.05(3/4)

I.D9.52(3/8)

Low Pressure Gas Pipe High Pressure Gas PipeLiquid pipe

[Unit : mm(inch)]

HR UNIT PCB

ENGLISH

2 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

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 in-

door 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.

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

HR UNIT PCB

ENGLISH

2) Zoning setting

- Set the address of the valve of the HR unit to the central control address of the connected in-

door 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

HR UNIT PCB

ENGLISH

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 in-

door units

- Numbers of connected indoor units whose addressing is completed are indicated for 30 sec-

onds on 7-segment LED of the outdoor unit PCB

- After completing addressing, address of each indoor unit is indicated on the wired remote con-

trol display window. (CH01, CH02, CH03, ……, CH06 : Indicated as numbers of connected in-

door units)

[Heat Recovery (MAIN PCB)]

DIP-SWITCH 7 - Segment

SW01C ( : conﬁrm)

SW02C (ඔ : backward)

SW03C (ඖ : forward)

SW04C (

: cancel)

SW01D (reset)

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 is only possible on the master Unit.

• Automatic Addressing has to be performed after 3 minutes to improve communication.

HR UNIT PCB

ENGLISH

The Procedure of Automatic Addressing

• Automatic addressing setting end

Numbers of indoor unit connection set whose

addressing is completed are indicated for 30seconds on

7-segment LED after completing setting

Indoor address number is displayed on wired remote control or

indoor unit display window. It is not an error message, will

disappeared when on/off button is pressed on remote control

ex) Display of 01, 02, ..., 15 means connection of 15 indoor units

and Automatic addressing is completed normally.

Automatic addressing start

Waiting 3 minutes

Power On

Press RED Button for 5 sec.

(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

HR UNIT PCB

ENGLISH

Flow chart of auto addressing for pipe detection

Completion of auto pipe detection

Are the number

of indoor units connected to the

outdoor unit wiring and displayed

one equal?

Reset the power of HR unit PCB

Confirm that the setting of No.2, 3 of

SW02M corresponds with the number of

indoor units.

Master unit 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) :

“Atc” Using

Outdoor temperature is below 15°C(59°F) :

“Ath” Using

88' is displayed on 7-SEG of the outdoor

unit main PCB

Outdoor unit is operated for 5~60 minues.

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

⇒

HR unit

number

⇒

Valve number

HR unit : '200'

Check the HR unit and indoor unit

Pipe detection error occur after 30

seconds.

Check the installation of pipe of

outdoor, indoor, HR unit

Incompletion of auto pipe detection

Retry auto pipe detection after

checking trouble

Is the pipe

setting condition

satisfied during the operation of

indoor unit?

Confirmation of indoor unit address setting

Turn No.1 of SW02M of HR unit PCB off.

YES

※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.

DIP-SW01 7 - Segment

SW01C ( : conﬁrm)

SW02C (ඔ : backward)

SW03C (ඖ : forward)

SW04C (

: cancel)

SW01D (reset)

HR UNIT PCB

ENGLISH

Flow chart of manual addressing for pipe detection

Completion of manual pipe detection

Reset the power of HR unit PCB.

Enter the central control address into

each indoor unit using its wired remote

control.

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.

Reset the power of outdoor unit PCB.

Wait for about 5 minutes.

The number of the indoor units installed is

displayed.

Ex)HR

⇒

The number of the indoor

Check the central control address of

indoor and HR unit.

Make sure that reset the outdoor

unit power when changing the

central control unit

Are the number

of indoor units connected to the

outdoor unit and displayed one

equal?

Execute in case of Auto pipe detection

failure

Turn No.1 of SW02M of HR unit PCB on.

YES

HR UNIT PCB

ENGLISH

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.

- Operation: None

- Display: None

No.

Display and setup

Setup and Contents

- Operation: Turn dip S/W No.1 on to address valve

- Display: Existing value saved in EEPROM is dis-

played in

7-SEG.

- Operation: Set the digit of 10 to the number in

Group High data of the wired remote control con-

nected to the corresponding indoor unit to the

valve #1 by pressing left tack S/W.

- Display: Digit increasing with the times of press-

ing 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 con-

nected to the corresponding indoor unit to the

valve #1 by pressing right tack S/W.

- Display: Digit increasing with the times of press-

ing tack S/W is displayed in right 7-SEG

- Operation: Turn dip S/W No.1 off to save the ad-

dress of

valve #1

- Display: "11" displayed in 7-SEG disappears

7-SEG SW01M SW03M SW04M

- 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 num-

ber than used address numbers of the valves connected with indoor units.

(The valves does not work if the address numbers are same.)

HR UNIT PCB

ENGLISH

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 8 per a port(rotary switch 0~7), in case of setting above of 8 with rotary

switch, it will display error.

6) Setting the rotary switch on original condition(HR unit number set conditions) after all finishing a pip-

ing setting.

7) The rotary switch set value of above number of indoor units which is connected with FF and pre-

vents a malfunction.

(Example: The case where 3 indoor units is connected in piping 1, sets from rotary switch 0,1,2 and

3,4,5,6,7 with FF set)

- Prerequisite for manual valve addressing: central control address of each indoor unit must be pre-

set differently at its wired remote control.

No. Display and setup Setup and Contents

7-SEG SW01M SW03M SW04M

SW05M

- Operation: None

- Display: None

7-SEG SW01M SW03M SW04M

SW05M

- 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.

7-SEG SW01M SW03M SW04M

SW05M

- Operation : SW05M : 1

- Display : Display former value.

7-SEG SW01M SW03M SW04M

SW05M

- Operation : Setting No. using SW03M and

SW04M, SW05M : 1

- Display : Display setting value.

7-SEG SW01M SW03M SW04M

SW05M

- 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

SW05M

- Operation : Return valve of addressing HR unit.

- Display : None

7-SEG SW01M SW03M SW04M

SW05M

- 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 num-

ber than used address numbers of the valves connected with indoor units.(The valves does not

work if the address numbers are same.)

HR UNIT PCB

ENGLISH

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

Identiﬁcation of Manual Valve ID (Address)

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.

No. Display and setup Setup and Contents

7-SEG SW01M

- Operation: Turn dip S/W No.1 on.

- Display: "11" is displayed in 7-SEG

7-SEG SW01M

- Operation: Turn dip S/W No.1 off.

- 7-SEG disappeared

No. Display and setup Setup and Contents

7-SEG SW01M

- Operation: more than 2 dip switches turned on.

- Display: "Er" is displayed in 7-SEG

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)

HR UNIT PCB

ENGLISH

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 1.5seconds stop twinkling)

ROTARY 01 ROTARY 02

No. of Indoor unit.

No. of HR unit branch.

No. of HR unit.

CAUTION

• Waiting for 80seconds after power on.

• The zoning information and Master IDU information remove from EEPROM after Auto-address-

ing.

• If there is installed the central control, it is impossible setting of Master IDU in zoning.

HR UNIT PCB

ENGLISH

MODE FUNCTION OPTION VALUE ACTION

remarks

con-

tent

Display1

content

Display2

content Display3

con-

tent

Display4

implement Display5

In-

stalla-

tion

Cool & Heat

Selector

oFF

op1~op2

selected the

option

- -

change the

set value

blank

save in

EEPROM

Static pressure

compensation

oFF

op1~op3

selected the

option

- -

change the

set value

blank

save in

EEPROM

Night low noise

oFF

op1~op12

selected the

option

- -

change the

set value

blank

save in

EEPROM

Overall defrost

oFF

selected the

option

- -

change the

set value

blank

save in

EEPROM

ODU address

0~255

set the

value

change the

set value

blank

save in

EEPROM

Snow removal &

rapid defrost

oFF

op1~op3

selected the

option

- -

change the

set value

blank

save in

EEPROM

Target pressure

adjusting

op1~op4

selected the

option

- -

change the

set value

blank

save in

EEPROM

* Functions save in EEPROM will be kept continuously, though the system power was reset.

Setting the function

Select the mode/function/option/value using ‘▶’, ‘◀’ Button and confirm that using the ‘●’ but-

ton after dip switch No.5 is turned on.

DIP-SW01 7 - Segment

SW01C ( : conﬁrm)

SW02C (ඔ : backward)

SW03C (ඖ : forward)

SW04C (

: cancel)

SW01D (reset)

HR UNIT PCB

ENGLISH

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 pur-

pose.

Outdoor Units (External PCB)

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) BA

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)

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

WARNING

• Valve address and central control address of its corresponding indoor unit should be set identi-

cal in manual addressing.

TEST RUN

ENGLISH

TEST RUN

Cool & Heat selector

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 :

“Fn1” Push the ‘●’ button

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

“oFF”,“op1”,“op2” Push the ‘●’ button

Cool & Heat Selection mode is set

Function setting

Switch control Function

Switch(Phase) Switch(Bottom) oFF op1(mode) op2(mode)

Right Left Not operate Cooling Cooling

Right Right Not operate Heating Heating

Left - Not operate Fan mode Off

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.

Switch (Phase)

Switch (Bottom)

Left side

Right side

TEST RUN

ENGLISH

Static pressure compensation mode

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

FAN Maximum RPM of each step (460V Model)

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~op3” Push the ‘●’ button

Start the Static pressure compensation mode :

Save the selected option value in EEPROM

Capacity 8HP(6Ton)

10~14HP, 18HP(8~14Ton)

Max. RPM

Standard 730 950

op1 760 1020

op2 780 1050

op3 800 1130

FAN Maximum RPM of each step (220V Model)

Capacity 8HP(6Ton)

10~14HP, 18HP(8~14Ton)

Max. RPM

Standard 850 1050

op1 870 1080

op2 890 1110

op3 900 1120

TEST RUN

ENGLISH

Night Low Noise Function

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

Time Settings Noise

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

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

CAUTION

• Request installer to set the function during installation.

• If ODU RPM changes, cooling capacity may go down.

Capacity

Heat Pump 8HP(6Ton)

10~14HP, 18HP

(8~14Ton)

Step Noise(dB)

op1~op3, op10 55 59

op4~op6, op11 52 56

op7~op9, op12 49 53

TEST RUN

ENGLISH

Overall defrost mode

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 :

“Fn4” Push the ‘●’ button

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

“on” ~ “oFF” Push the ‘●’ button

Overall defrost mode is set

mode setting

CAUTION

• Ask an authorized technician to setting a function.

- on: Operate overall defrost

- off: Operate partial defrost

TEST RUN

ENGLISH

Setting the ODU address

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

CAUTION

• Ask an authorized technician to setting a function.

• If use a function, first install a Central controller.

100

TEST RUN

ENGLISH

Snow removal & rapid defrost

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

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

mode setting

setting Mode

oFF Not setting

op1 Snow removal mode

op2 Rapid defrost mode

op3 Snow removal mode. + Rapid defrost mode.

TEST RUN

101

ENGLISH

Target pressure adjusting

mode setting method

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

CAUTION

• Ask an authorized technician to setting a function.

• If do not use a function, set an off-mode.

• Change a power consumption or capacity.

Setting

mode

Purpose

Condensing

temperature

variation

Evaporating

temperature

variation

“Heat” “Cool”

op1 Increase capacity Increase capacity

-3°C(26.6°F) +2°C(35.6°F)

op2

Decrease power consumption

Increase capacity

-1.5°C(29.3°F) -2°C(28.4°F)

op3

Decrease power consumption Decrease power consumption +2.5°C(36.5°F) -4°C(24.8°F)

op4

Decrease power consumption Decrease power consumption -4.5°C(23.9°F) -6°C(21.2°F)

102

TEST RUN

ENGLISH

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-seg-

ment 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)

* Refer to the DX-Venitilation manual for DX-Venitilation error code.

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

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 7 -

Inlet Air temperature sensor of FAU Air temperature sensor of indoor unit is open or short

Outdoor unit related error

2 1 *

Master Outdoor Unit Inverter Compressor

IPM Fault

Master Outdoor Unit Inverter Compressor Drive IPM Fault

2 2 *

Inverter Board Input Over Current(RMS) of

Master Outdoor Unit

Master Outdoor Unit Inverter Board Input Current excess

(RMS)

2 3 *

Master Outdoor Unit Inverter Com-

pressor DC link Low Voltage

DC charging is not performed at Master Outdoor

Unit after starting relay turn on.

2 4 *

Master Outdoor Unit High Pressure

Switch

System is turned off by Master Outdoor Unit

high pressure switch.

2 5 *

Master Outdoor Unit Input Voltage

High/ Low Voltage

Master Outdoor Unit input voltage is over 289V

or below 173V(ARUB***BTE4)

Master Outdoor Unit input voltage is over 506V

or below 414V(ARUB***DTE4)

2 6 *

Master Outdoor Unit Inverter Com-

pressor Start Failure

The First Start Failure by Master Outdoor Unit In-

verter Compressor Abnormality

Error No. of Compressor

Error No.

Error No. of Unit

Repeat

TEST RUN

103

ENGLISH

Display Title Cause of Error

Outdoor unit related error

2 9 *

Master Outdoor Unit Inverter Com-

pressor Over Current

Master Outdoor Unit Inverter Compressor Fault

or Drive Fault

3 2 *

Master Outdoor Unit Inverter Com-

pressor1 High Discharge Temperature

Master Outdoor Unit Inverter Compressor1

High Discharge Temperature

3 3 *

Master Outdoor Unit Inverter Com-

pressor2 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

3 6 *

Master Outdoor Unit Low Compres-

sion Ratio Limited

Master Outdoor Unit Low Compression Ratio

Limited

4 0 *

Master Outdoor Unit Inverter Com-

pressor CT Sensor Fault

Master Outdoor Unit Inverter Compressor CT

Sensor open or short

4 1 *

Master Outdoor Unit Inverter Com-

pressor1 Discharge Temperature Sen-

sor Fault

Master Outdoor Unit Inverter Compressor Dis-

charge 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 Tempera-

ture Sensor(Front side) open or short

4 6 *

Master Outdoor Unit Suction Tempera-

ture Sensor Fault

Master Outdoor Unit Suction Temperature Sen-

sor open or short

4 7 *

Master Outdoor Unit Inverter Com-

pressor2 Discharge Temperature Sen-

sor Fault

Master Outdoor Unit Inverter Compressor2 Dis-

charge Temperature Sensor open or short

4 9 *

Master Outdoor Unit Faulty IPM Tem-

perature Sensor

Master Outdoor Unit IPM Temperature Sensor

short/open

5 0 *

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

5 2 *

Communication error : inverter PCB ’

Main PCB

Failing to receive inverter signal at main PCB of

Master Outdoor Unit

5 3 *

Communication error : indoor unit ’

Main PCB of Outdoor Unit

Failing to receive indoor unit signal at main PCB

of Outdoor Unit .

5 7 *

Communication error : Main PCB ’

inverter PCB

Failing to receive signal main PCB at inverter

PCB of Master Outdoor Unit

5 9 *

Mixing Installation of Sub Outdoor Unit

Mixing Installation of Old Sub Outdoor Unit and

New Slave Outdoor Unit

104

TEST RUN

ENGLISH

Display Title Cause of Error

Outdoor unit related error

6 0 *

Inverter PCB EEPROM Error of Master

Outdoor Unit

Access Error of Inverter PCB of Master Outdoor

Unit

6 2 *

Master Outdoor Unit Inverter Heatsink

High Temperature

System is turned off by Master Outdoor Unit In-

verter Heatsink High Temperature

6 5 *

Master Outdoor Unit Inverter Heatsink

Temperature Sensor Fault

Master Outdoor Unit Inverter Heatsink Temper-

ature Sensor open or short

6 7 *

Master Outdoor Unit Fan Lock Restriction of Master Outdoor Unit

7 1 *

Converter CT Sensor Error of Master

Outdoor Unit

Converter 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 6 *

Master Outdoor Unit Fan DC Link High

Voltage Error

Master Outdoor Unit Fan DC Link High Voltage

Error

7 7 *

Master Outdoor Unit Fan Over Current

Error

Master Outdoor Unit Fan Current is over 5A

7 9 *

Master Outdoor Unit Fan Start Failure

Error

Master Outdoor Unit Fan First Position Sensing

Failure

8 6 *

Master Outdoor Unit Main PCB EEP-

ROM Error

Communication Fail Between Master Outdoor

Unit Main MICOM and EEPROM or omitting

EEPROM

8 7 *

Master Outdoor Unit Fan PCB EEP-

ROM Error

Communication Fail Between Master Outdoor

Unit Fan MICOM and EEPROM or omitting

EEPROM

TEST RUN

105

ENGLISH

Display Title Cause of Error

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

Master Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of

Master unit.

1 0

Master Outdoor Unit FAN IPM

Fault Error

Instant Over Current at Master Outdoor Unit

Fan IPM

Master Outdoor Unit Fan DC Link

Low Voltage Error

Master Outdoor Unit Fan DC Link Input Voltage

is under 380V

1 1 3

Master Outdoor Unit Liquid pipe

Temperature Sensor Error

Liquid pipe temperature sensor of Master Out-

door Unit is open or short

1 1 4

Master Outdoor Unit Subcooling

Inlet Temperature Sensor Error

Master Outdoor Unit Subcooling Inlet Tempera-

ture Sensor Error

1 1 5

Master Outdoor Unit Subcooling

Outlet Temperature Sensor Error

Master Outdoor Unit Subcooling Outlet Tem-

perature Sensor Error

1 1 6

Master Outdoor Unit Oil Level Sen-

sor Error

Oil Level Sensor of Master Outdoor Unit is

open or short

1 4 5 *

Master outdoor unit Main Board -

External Board communication

Error

Master outdoor unit Main Board - External

Board communication Error

Failure of operation mode conver-

sion at Master Outdoor Unit

Failure of operation mode conversion at Master

Outdoor Unit

1 5

Master Outdoor Unit Heat Exchanger

Temperature Sensor (upper part)

Fault

Master Outdoor Unit Heat Exchanger Tempera-

ture Sensor (upper part) Fault

Master Outdoor Unit Heat Exchanger

Temperature Sensor (lower part)

Fault

Master Outdoor Unit Heat Exchanger Tempera-

ture Sensor(lower part) open or short

1 8 2

Master outdoor unit External Board

Main-Sub Micom communication

Error

Master Outdoor Unit Main Board Main-Sub

Micom communication failed

1 9 3

Master Outdoor Unit Fan Heatsink

High Temperature

System is turned off by Master Outdoor Unit

Fan Heatsink High Temperature

1 9 4

Master Outdoor Unit Fan Heatsink

Temperature Sensor Fault

Master Outdoor Unit Fan Heatsink Temperature

Sensor open or short

HR unit related error

2 0

Searching pipe Error Failure of automatic addressing of valves

C +

#HR

HR unit1 Liqiud sensor error Liquid pipe sensor of HR unit open or short

C +

#HR

HR unit1 Sub Cooling Pipe In sen-

sor error

Sub Cooling Pipe In sensor of HR unit open or

short

C +

#HR

HR unit1 Sub Cooling Pipe Out sen-

sor error

Sub Cooling Pipe Out sensor of HR unit. open

or short

Outdoor unit related error

106

CAUTION FOR REFRIGERANT LEAK

ENGLISH

Checking procedure of limiting concentration

Check limiting concentration along following steps and take appropriate measure depending on

the situation.

Calculate amount of all the replenished refrigerant [kg(lbs)] per each refrigerant system.

Calculate minimum room capacity

Calculate room capacity by regarding a portion as one room or the smaller room.

- Without partition - With partition and with opening which serve

as passage of air to adjoining room

Limiting concentration is the limit of Freon gas concentration where immediate measures can

be taken without hurting human body when refrigerant leaks in the air. The limiting concen-

tration shall be described in the unit of Kg/m

(lbs/ft

) (Freon gas weight per unit air volume)

for facilitating calculation.

Limiting concentration: 0.44kg/m

(0.028lbs/ft

)(R410A)

Amount of additional

replenished refrigerant

Total amount of replenished

refrigerant in refrigerant

facility [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 replenished

refrigerant per one outdoor

unit system

Amount of replenished

refrigerant at factory shipment

Amount of additionally

replenished refrigerant

depending on piping

length or piping

diameter at customer

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)

Outdoor unit

(No.1 system)

Flow of

refrigerant

Indoor unit

Room where refrigerant leaks

(Refrigerant of the whole No.1

system ﬂows out.)

The installer and system specialist shall secure safety against leakage according to local regula-

tions 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 limiting

concentration even if the refrigerant gas leaks in the room.

Limiting concentration

CAUTION FOR REFRIGERANT LEAK

107

ENGLISH

- With partition and without opening which serve as passage of air to adjoining room

Calculate refrigerant concentration

In case the concentration exceeds the limit

When the concentration exceeds the limit, change original plan or take one of the countermea-

sures shown below:

• Countermeasure 1

Provide opening for ventilation.

Provide 0.15% or more opening to floor space both above and below door, or provide opening

without door.

• Countermeasure 2

Provide gas leak alarm linked with mechanical ventilator.

Reducing the outdoor refrigerant qty.

(R410A)

Refrigerant concentration

[Kg/m

(lbs/ft

)]

Total amount of replenished

refrigerant in refrigerant facility [kg(lbs)]

Capacity of smallest room where

indoor unit is installed [m

(ft

)]

In case the result of calculation exceeds

the limiting concentration, perform the

same calculations by shifting to the

second smallest, and the third smallest

rooms until at last the result is below the

limiting concentration.

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.

108

INSTALLATION GUIDE AT THE SEASIDE

ENGLISH

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.

In case, to install the outdoor unit on the sea-

side, 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 keep more than 70cm(2.3ft) of

space between outdoor unit and the wind-

break for easy air flow.

Select a well-drained place.

CAUTION

• 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) di-

rectly. It can result corrosion on the

product. Corrosion, particularly on the

condenser and evaporator fins, could

cause product malfunction or inefficient

performance.

• If outdoor unit is installed close to the

seaside, it should avoid direct exposure

to the sea wind. Otherwise it needs ad-

ditional anticorrosion treatment on the

heat exchanger.

Sea wind

Windbreak

• Periodic ( more than once/year ) clean-

ing of the dust or salt particles stuck on

the heat exchanger by using water

INSTALLATION GUIDE AT THE SEASIDE

OUTDOOR UNIT (ODU) INSTALLATION DETAILS FOR (3) FOAM SCREW PROTECTOR PADS.

109

ENGLISH

Place (1) foam pad at the bottom of the unit between the casing and the coil in each of the fol-

lowing locations:

• Right side (toward front side of ODU) and securely in place to protect the heat exchanger coil

from the sharp screw points.

• Left side (toward front side of ODU) and securely in place to protect the heat exchanger coil

from the sharp screw points.

• Back side (center of ODU) and securely in place to protect the heat exchanger coil from the

sharp screw points. Note: take caution as screw locations are not easily visible.

Important:

The (3) pads must be securely in place to protect the heat exchanger coil from the sharp screw

points during a seismic event.

Use OSHPD Seismic Certiﬁcation Preapproval (OSP)

• (1) OSP Label for ODU > OSP-0386-10 for LG Model No.: ARU*nnn*TE4

• (3) foam screw protector pads w/ adhesive backing

• This installation detail

Please do not discard this kit before following this instruction during the installation of the

ODU(s).

OUTDOOR UNIT (ODU) INSTALLATION DETAILS

FOR (3) FOAM SCREW PROTECTOR PADS.

Right Left Back

110

ENGLISH

LG Electronics ARUB121BTE4 Air Conditioner

Product's Documents

User Manual

Specifications

LG Electronics ARUB121BTE4 Questions and Answers

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