LG Electronics ARUB096BT3 User Manual

INSTALLATION MANUAL

AIR CONDITIONER

• Please read this installation manual completely before installing the product.

• Installation work must be performed in accordance with the national

wiring standards by authorized personnel only.

• Please retain this installation manual for future reference after reading

it thoroughly.your set and retain it for future reference.

www.lg.com

MODELS

ARUB Series(Heat recovery)

P/NO : MFL67221405

ENGLISH FRANCAIS ESPAÑOL

PORTUGUESE

2 Outdoor Unit

CAUTION

Improper installation, adjustment, alteration, service or maintenance can void the warranty.

The weight of the condensing unit requires caution and proper handling procedures when lifting

or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

Safety Precautions

• Always wear safety eye wear and work gloves when installing equipment.

• Never assume electrical power is disconnected. Check with meter and equipment.

• Keep hands out of fan areas when power is connected to equipment.

• R-410A causes frostbite burns.

• R-410A is toxic when burned.

NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner

or prominently displayed near the indoor Furnace/Air Handler Unit.

When wiring:

Electrical shock can cause severe personal injury or death. Only a qualified,

experienced electrician should attempt to wire this system.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

•

• The choice of materials and installations must comply with the applicable local/national or international standards.

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When transporting:

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and

bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on

the air conditioner can cut your finger.

When installing...

... in a wall: Make sure the wall is strong enough to hold the unit's weight.

It may be necessary to construct a strong wood or metal frame to provide added support.

... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause

dripping and water damage to wall and floors.

... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,

level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal

frame. Provide a suitable air baffle.

... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is

higher than drifting snow. Provide snow vents.

When connecting refrigerant tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Check carefully for leaks before starting the test run.

When servicing

• Turn the power OFF at the main power box(mains) before opening the unit to check or repair

electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have

been left inside the unit being serviced.

• Installation or repairs made by unqualified persons can result in hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety

procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property

damage, personal injury and/or death.

IMPORTANT!

Please read this instruction sheet completely before installing the product.

This air conditioning system meets strict safety and operating standards. As the installer or service

person,it is an important part of your job to install or service the system so it operates safely and

efficiently.

WARNING

Installation of all field wiring and components MUST conform with local building codes or, in the absence of local

codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian

Electrical code and National Building Code of Canada.

ARUB Series Outdoor unit Installation Manual

TABLE OF CONTENTS

ENGLISH

Installation Manual 3

Safety Precautions ................................................................................................................4

Installation Process ..............................................................................................................8

Outdoor units Information....................................................................................................9

Environment-friendly Alternative Refrigerant R410A ......................................................13

Select the Best Location.....................................................................................................13

Installation Space................................................................................................................15

Lifting method .....................................................................................................................17

Installation ...........................................................................................................................18

Refrigerant piping installation ...........................................................................................23

Pipe connections between indoor and outdoor unit .......................................................29

Refrigerant piping system ..................................................................................................32

Electrical Wiring ..................................................................................................................54

HR Unit PCB.........................................................................................................................75

Test Run ...............................................................................................................................90

Caution For Refrigerant Leak ...........................................................................................114

Installation guide at the seaside ......................................................................................116

4 Outdoor Unit

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must

be followed.

■

Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

■

Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

Be sure not to do.

Be sure to follow the instruction.

Installation

Have all electric work done by a licensed

electrician according to "Electric Facility

Engineering Standard" and "Interior Wire

Regulations" and the instructions given in

this manual and always use a special circuit.

• If the power source capacity is inadequate or

electric work is performed improperly, electric

shock or fire may result.

Ask the dealer or an authorized technician to

install the air conditioner.

• Improper installation by the user may result in

water leakage, electric shock, or fire.

Always ground the product.

• There is risk of fire or electric shock.

Always intstall a dedicated circuit and breaker.

• Improper wiring or installation may cause fire or

electric shock.

For re-installation of the installed product,

always contact a dealer or an Authorized

Service Center.

• There is risk of fire, electric shock, explosion, or

injury.

Do not install, remove, or re-install the unit

by yourself (customer).

• There is risk of fire, electric shock, explosion, or

injury.

Do not store or use flammable gas or

combustibles near the air conditioner.

• There is risk of fire or failure of product.

Use the correctly rated breaker or fuse.

• There is risk of fire or electric shock.

Prepare for strong wind or earthquake and

install the unit at the specified place.

• Improper installation may cause the unit to top-

ple and result in injury.

Do not install the product on a defective

installation stand.

• It may cause injury, accident, or damage to the

product.

ENGLISH

Installation Manual 5

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 exceed-

ed. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxy-

gen 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 installing and moving the air condition-

er to another site, do not charge it with a

different refrigerant from the refrigerant

specified on the unit.

• If a different refrigerant or air is mixed with the

original refrigerant, the refrigerant cycle may

malfunction and the unit may be damaged.

Do not reconstruct to change the settings of

the protection devices.

• If the pressure switch, thermal switch, or other

protection device is shorted and operated

forcibly, or parts other than those specified by

LGE are used, fire or explosion may result.

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 electro-

static filter, if the unit is so equipped.)

• There is risk of physical injury, electric shock, or

product failure.

Safety Precautions

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.

6 Outdoor Unit

Safety Precautions

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-fre-

quency medical equipment, or radio communication equip-

ment may cause the air conditioner to operate erroneous-

ly, 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 gen-

erate heat and cause a fire.

Be sure the installation area does not deteri-

orate with age.

• If the base collapses, the air conditioner could

fall with it, causing property damage, product

failure, or personal injury.

Install and insulate the drain hose to ensure that water is drained away properly based on the

installation manual.

• A bad connection may cause water leakage.

Installation

Always check for gas (refrigerant) leakage after instal-

lation 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 neighbor-

hoods.

• It may cause a problem for your neighbors.

ENGLISH

Installation Manual 7

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.

Be very careful about product transportation.

• Only one person should not carry the product if it weighs more than 20kg(44lbs).

• 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.

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.

Safety Precautions

8 Outdoor Unit

Installation Process

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 3.8MPa(551psi) 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

Refer to pipe detection flowchart

Pipe detection of HR Unit

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.

• The above list indicates the order in which the individual work operations are normally carried out but this order may be

varied where local conditions warrants such change.

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pres-

sure 3.8MPa(551psi).

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refriger-

ant is charged in its gaseous state, its composition changes and the system will not work properly.)

ENGLISH

Installation Manual 9

Outdoor units Information

Combination Ratio(50~130%)

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

Outdoor Number Connection Capacity

Single outdoor units 130%

Double outdoor units 130%

Triple outdoor units 130%

Heat Recovery

Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz)

Unit 1 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

8 10 12

6 8 10

ARUB072BT3 ARUB096BT3 ARUB121BT3

5.5 9.4 9.4

12.1 20.7 20.7

13 16 20

(190 × 1) (280 × 1) (280 × 1)

(418 × 1) (617 × 1) (617 × 1)

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

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

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

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

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

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

14 18 20

12 14 16

ARUB144BT3 ARUB168BT3 ARUB192BT3

ARUB072BT3 ARUB072BT3

ARUB096BT3 ARUB121BT3

9.4 14.9 14.9

20.7 32.8 32.8

23 29 32

(280 × 1) (190 × 1) + (280 × 1) (190 × 1) + (280 × 1)

(617 × 1) (418 × 1) + (617 × 1) (418 × 1) + (617 × 1)

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

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

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

(48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

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

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

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

10 Outdoor Unit

Outdoor units Information

Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

22 24 26

18 20 22

ARUB216BT3 ARUB240BT3 ARUB264BT3

ARUB072BT3 ARUB096BT3 ARUB121BT3

ARUB144BT3 ARUB144BT3 ARUB144BT3

14.9 19 19

32.8 41 41

35 39 42

(190 × 1) + (280 × 1) (280 × 2) (280 × 2)

(418 × 1) + (617 × 1) (617 × 2) (617 × 2)

(920×1,680×760)×1 (1,240×1,680×760)×2 (1,240×1,680×760)×2

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

(48.8×66.1×29.9)×1

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

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

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

36 38 40

30 32 34

ARUB360BT3 ARUB384BT3 ARUB408BT3

ARUB072BT3 ARUB096BT3 ARUB121BT3

ARUB144BT3 ARUB144BT3 ARUB144BT3

24.3 28.2 28.2

53.5 62.1 62.1

58 61 64

(190 × 1) + (280 × 2) (280 × 3) (280 × 3)

(418 × 1) + (617 × 2) (617 × 3) (617 × 3)

(920×1,680×760)×1 (1,240×1,680×760)×3 (1,240×1,680×760)×3

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

(48.8×66.1×29.9)×2

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

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

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

Unit 2 Outdoor Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

28 32 34

24 26 28

ARUB288BT3 ARUB312BT3 ARUB336BT3

ARUB144BT3 ARUB072BT3 ARUB072BT3

ARUB144BT3 ARUB096BT3 ARUB121BT3

ARUB144BT3 ARUB144BT3

19 24.3 24.3

41 53.5 53.5

45 52 55

(280 × 2) (190 × 1) + (280 × 2) (190 × 1) + (280 × 2)

(617 × 2) (418 × 1) + (617 × 2) (418 × 1) + (617 × 2)

(1,240×1,680×760)×2 (920×1,680×760)×1 (920×1,680×760)×1

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

(48.8×66.1×29.9)×2 (36.2×66.1×29.9)×1 (36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

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

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

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

ARUB432BT3

ARUB144BT3

28.2

62.1

(280 × 3)

(617 × 3)

(1,240×1,680×760)×3

(48.8×66.1×29.9)×3

19.05(3/4)

41.3(1-5/8)

34.9(1-3/8)

Outdoor units Information

ENGLISH

Installation Manual 11

Heat Recovery

Power Supply: Outdoor Unit (3Ø, 460V, 60Hz)

Unit 1 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

8 10 12

6 8 10

ARUB072DT3 ARUB096DT3 ARUB121DT3

5.5 9.4 9.4

12.1 20.7 20.7

13 16 20

(190 × 1) (280 × 1) (280 × 1)

(418 × 1) (617 × 1) (617 × 1)

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

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

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

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

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

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

14 18 20

12 14 16

ARUB144DT3 ARUB168DT3 ARUB192DT3

ARUB144DT3 ARUB072DT3 ARUB072DT3

ARUB096DT3 ARUB121DT3

9.4 14.9 14.9

20.7 32.8 32.8

23 29 32

(280 × 1) (190 × 1) + (280 × 1) (190 × 1) + (280 × 1)

(617 × 1) (418 × 1) + (617 × 1) (418 × 1) + (617 × 1)

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

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

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

(48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

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

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

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

Unit 2 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

22 24 26

18 20 22

ARUB216DT3 ARUB240DT3 ARUB264DT3

ARUB072DT3 ARUB096DT3 ARUB121DT3

ARUB144DT3 ARUB144DT3 ARUB144DT3

14.9 19 19

32.8 41 41

35 39 42

(190 × 1) + (280 × 1) (280 × 2) (280 × 2)

(418 × 1) + (617 × 1) (617 × 2) (617 × 2)

(920×1,680×760)×1 (1,240×1,680×760)×2 (1,240×1,680×760)×2

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

(48.8×66.1×29.9)×1

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

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

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

Outdoor units Information

12 Outdoor Unit

Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

ARUB432DT3

ARUB144DT3

28.2

62.1

(280 x 3)

(617 x 3)

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

(48.8 x 66.1 x 29.9) x 3

19.05(3/4)

41.3(1-5/8)

34.9(1-3/8)

Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

36 38 40

30 32 34

ARUB360DT3 ARUB384DT3 ARUB408DT3

ARUB072DT3 ARUB096DT3 ARUB121DT3

ARUB144DT3 ARUB144DT3 ARUB144DT3

24.3 28.2 28.2

53.5 62.1 62.1

58 61 64

(190 × 1) + (280 × 2) (280 × 3) (280 × 3)

(418 × 1) + (617 × 2) (617 × 3) (617 × 3)

(920×1,680×760)×1 (1,240×1,680×760)×3 (1,240×1,680×760)×3

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

(48.8×66.1×29.9)×2

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

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

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

Unit 2 Outdoor Unit 3 Outdoor Unit

System

Ton

Model

Product Charge

lbs

Max. Connectable No. of Indoor Units

Net Weight

lbs

Dimensions

(WxHxD)

inch

Connecting

Pipes

Liquid Pipes[mm(inch)]

Low Pressure Gas [mm(inch)]

High Pressure Gas [mm(inch)]

28 32 34

24 26 28

ARUB288DT3 ARUB312DT3 ARUB336DT3

ARUB144DT3 ARUB072DT3 ARUB072DT3

ARUB144DT3 ARUB096DT3 ARUB121DT3

ARUB144DT3 ARUB144DT3

19 24.3 24.3

41 53.5 53.5

45 52 55

(280 × 2) (190 × 1) + (280 × 2) (190 × 1) + (280 × 2)

(617 × 2) (418 × 1) + (617 × 2) (418 × 1) + (617 × 2)

(1,240×1,680×760)×2 (920×1,680×760)×1 (920×1,680×760)×1

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

(48.8×66.1×29.9)×2 (36.2×66.1×29.9)×1 (36.2×66.1×29.9)×1

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

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

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

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

ENGLISH

Installation Manual 13

Select the Best Location

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

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors 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, stagnation, 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 additionally

performing defrost operation.

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

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

(Ex) Rooftop where sunshine always shines.

2. Performance of heating will be reduced and pre-heat time of the indoor unit may be lengthened in case of

installing the outdoor unit in winter at following location:

(1) Shade position with a narrow space

(2) Location with much moisture in neighboring floor.

(3) Location with much humidity around.

(4) Location where liquid gathers since the floor is not even.

• 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. These days the developed countries have approved it as the environment-friendly refrigerant and

encouraged to use it widely to prevent environment pollution.

CAUTION:

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed

pressure 3.8MPa(551psi).

• 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.

Environment-friendly Alternative Refrigerant R410A

14 Outdoor Unit

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.

Inspection door

(NOTICE 1)

(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) 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)

(NOTICE 2)

450(17-23/32)

100(3-15/16) more

(Serviceing space)

100(3-15/16) more

(Serviceing space)

60(2-3/8)

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

2. If reducers are used, servicing space must be increased equal to reducer's dimension.

NOTICE

(Unit : mm(inch))

Description

PRHR031/PRHR041 PRHR021

1 Low pressure Gas pipe connection port Ø28.58(1-1/8) Brazing connection

Ø22.2(7/8) Brazing connection

2 High pressure Gas pipe connection port Ø22.2(7/8) Brazing connection

Ø19.05(3/4) Brazing connection

3 Liquid pipe connection port

15.88(5/8) Brazing connection(PRHR041A)

Ø9.52(3/8) Brazing connection

12.7(1/2) Brazing connection(PRHR031A)

4 Indoor unit Gas pipe connection port Ø

15.88(5/8) Brazing connection

5 Indoor unit Liquid pipe connection port Ø9.52(3/8) Brazing connection

Ø9.52(3/8) Brazing connection

6 Control box - -

7 Hanger metal M10 or M8 M10 or M8

Part Name

No.

ENGLISH

Installation Manual 15

Installation Space

Individual Installation

■

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

as shown in the figures below.

Installation Space

Category

Case 1

(10mm

≤

Space A, C

≤

49mm)

Case 2

(Space A, C

≥

49mm)

Installation Space

4 sides are

walls

Only 2 sides

are walls

Limitations on

the height of

the wall

(Refer to

4 side walls)

Front

No limit to the height of the wall

No limit to the

height of the wall

Front

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

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

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

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

≥

10(13/32”) A

≥

50(1-31/32”)

≥

300(11-13/16”) B

≥

100(3-15/16”)

≥

10(13/32”) C

≥

50(1-31/32”)

≥

500(19-11/16”) D

≥

500(19-11/16”)

≥

10(13/32”) A

≥

50(1-31/32”)

≥

300(11-13/16”) B

≥

100(3-15/16”)

≥

10(13/32”) C

≥

50(1-31/32”)

≥

500(19-11/16”) D

≥

500(19-11/16”)

≥

20(25/32”) E

≥

100(3-15/16”)

≥

10(13/32”) A

≥

50(1-31/32”)

≥

300(11-13/16”) B

≥

100(3-15/16”)

≥

10(13/32”) C

≥

50(1-31/32”)

≥

500(19-11/16”) D

≥

500(19-11/16”)

≥

20(25/32”) E

≥

100(3-15/16”)

≥

600(23-5/8”) F

≥

500(19-11/16”)

≥

10(13/32”) A

≥

50(1-31/32”)

≥

300(11-13/16”) B

≥

100(3-15/16”)

≥

10(13/32”) C

≥

50(1-31/32”)

≥

300(11-13/16”) D

≥

100(3-15/16”)

≥

20(25/32”) E

≥

100(3-15/16”)

≥

500(19-11/16”) F

≥

500(19-11/16”)

≥

10(13/32”)

≥

300(11-13/16”)

≥

200(7-7/8”)

≥

300(11-13/16”)

≥

400(15-3/4”)

16 Outdoor Unit

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 500mm(19-11/16 inch) than the average snowfall

(annual average snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 100mm(3-15/16inch), always

remove snow for operation.

1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the

product. (If width of the frame is wider than that of the product, snow may accumulate)

2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.

Installation Space

ENGLISH

Installation Manual 17

Lifting method

• 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.

Lifting method

CAUTION

Be very careful while carrying the product.

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

Weight per Capacitance

Locking points for

transportation ropes

Forklift Carrying

Guide

Forklift Carrying

Hole

Chassis Capacity(HP(Ton)) Weight(kg(lbs))

UX2 8(6) 190(418)

UX3

10(8) 280(617)

12(10) 280(617)

14(12) 280(617)

18 Outdoor Unit

Installation

The location of the Anchor bolts

• Install at places where it can endure the weight and vibration/noise of the outdoor unit.

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

being fixed.

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

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

(

3-1

inc

)

(3-

)

t l

t 1

mm(3

-15/

16 i

)

t 1

-15/

)

eas

100m

(

-15/16

inch

)

eas

t 1

(

inch

)

Needed for outdoor units of 8Hp or above

Center of the Unit

The outdoor unit should

not be supported only by

the corner supports.

Needed for outdoor units of 8Hp or above

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)

Chassis

Outdoor unit capacity

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

H/R

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

UX3 10~14HP 1240(48-13/16) 1102(43-3/8)

ENGLISH

Installation Manual 19

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(7-7/8 inch).

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, liquid outlet

treatment(treatment of the liquid flowing out of the outdoor unit in operation), and the passages of

the pipe and wiring, when making the ground support.

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

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

WARNING

• Be sure to remove the MDF(wood support) of the bottom

side of the outdoor unit Base Pan before fixing the bolt. It

may cause the unstable state of the outdoor settlement,

and may cause freezing of the heat exchanger resulting in

abnormal operations.

• Be sure to remove the MDF(wood support) of the bottom

side of the outdoor unit before welding. Not removing

MDF causes hazard of fire during welding.

Pallet(Wood Support)

- Remove before Installation

Installation

At least 200mm

(7-7/8 inch)

At least 10mm

(13/32 inch)

Unit : mm(inch)

75(2-15/16)

100(3-15/16)

200(7-7/8)

Ⓐ

The corner part must be fixed firmly. Otherwise, the

support for the installation may be bent.

Ⓑ

Get and use M10 Anchor bolt.

Ⓒ

Put Cushion Pad between the outdoor unit and 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

20 Outdoor Unit

Preparation of Piping

1) Cut the pipes and the cable.

■

Use the accessory piping kit or the pipes purchased

locally.

■

Measure the distance between the indoor and the out-

door unit.

■

Cut the pipes a little longer than measured distance.

2) Burrs removal

■

Completely remove all burrs from the cut cross section

of pipe/tube.

■

Put the end of the copper tube/pipe to downward direc-

tion as you remove burrs in order to avoid to let burrs

drop in the tubing.

3) Flaring work

■

Carry out flaring work using flaring tool as shown below.

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

sion in the table above.

* ARNU093TN*2, ARNU123TN*2, ARNU153TN*2,

ARNU183TM*2, ARNU243TM*2 : Liquid pipe Ø9.52(3/8),

Gas pipe

Ø15.88(5/8) ARNU153BG*2, ARNU183BG*2,

ARNU243BG*2 : Liquid pipe Ø9.52(3/8), Gas pipe

Ø15.88(5/8)

4) 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.

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

Copper

tube

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Indoor Unit

capacity

[kW(Btu/h)]

Pipe "A"

Liquid

[mm(inch)]

Gas

[mm(inch)]

Liquid

[mm(inch)]

Gas

[mm(inch)]

≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) 0~0.5(0.02)

0.5(0.02)

~0.8(0.03)

< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)

0.5(0.02)

~0.8(0.03)

0.8(0.03)

~1.0(0.04)

< 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

0.5(0.02)

~0.8(0.03)

1.0(0.04)

~1.3(0.05)

≤ 28.0(95,900) Ø9.52(3/8) Ø22.2(7/8)

0.5(0.02)

~0.8(0.03)

1.0(0.04)

~1.3(0.05)

Installation

ENGLISH

Installation Manual 21

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.

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.

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.

Tightening torque

Union

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.

Opening shutoff valve

Closing shutoff valve

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

Shutoff valve

size

Tightening torque(Turn clockwise to close) [N·m(lbf·ft)]

Shaft(valve body) Cap(Valve lid) Service port Flare nut

Ø6.35(1/4)

5.4(4.0) ~ 6.6(4.9)

Hexagonal wrench

4mm(5/8inch)

13.5(10.0) ~

16.5(12.2)

11.5(8.5)

~ 13.9(10.3)

14(10.3) ~ 17(12.5)

Ø9.52(3/8) 33(24.3) ~ 39(28.8)

Ø12.7(1/2) 8.1(6.0) ~ 9.9(7.3) 18(13.3) ~ 22(16.2) 50(36.9) ~ 60(44.3)

Ø15.88(5/8) 13.5(10.0) ~ 16.5(12.2)

23(17.0) ~ 27(19.9)

62(45.7) ~ 75(55.3)

Ø19.05(3/4)

27(19.9) ~ 33(24.3)

93(68.6) ~119(87.8)

Ø22.2(7/8)

Hexagonal wrench

8mm(5/16inch)

36(26.6) ~ 44(32.5) -

Ø28(1

)

pipe size tightening torque [N·m(lbf·ft)] A[mm(inch)] flare shape

Ø9.52(3/8) 32.7(24.19)~39.9(29.45) 12.8(1/2)~13.2(17/32)

R=0.4~0.8

Ø12.7(1/2) 49.5(36.51)~60.3(44.47) 16.2(5/8)~16.6(21/32)

Ø15.88(5/8) 61.8(45.58)~75.4(55.61) 19.3(3/4)~19.7(25/32)

Installation

22 Outdoor Unit

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over

120°C(248°F)).

2. Precautions in high humidity circumstance:

This air conditioner has been tested according to the

"ISO Conditions with Mist" and confirmed that there is

not any default. However, if it is operated for a long

time in high humid atmosphere (dew point tempera-

ture: more than 23°C(73°F)), water drops are liable to

fall. In this case, add heat insulation material accord-

ing to the following procedure:

• Heat insulation material to be prepared... EPDM

(Ethylene Propylene Diene Methylene)-over

120°C(248°F)

the heat-resistance temperature.

• Add the insulation over 10mm(13/32 inch) thickness at high humidity environment.

Indoor unit

Thermal insulator

(accessory)

Fastening band

(accessory)

Refrigerant piping

HEAT INSULATION

Installation

ENGLISH

Installation Manual 23

Refrigerant piping Installation

Precautions on Pipe connection / Valve operation

Refrigerant piping Installation

Low Pressure

Gas pipe

Liquid pipe

High Pressure

Gas pipe

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

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

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

Flare connection for the indoor unit, and welding connection for

the outdoor pipe and the branching parts.

• Use hexagonal wrench to open/close the valve.

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.

CAUTION

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 the cables.)

24 Outdoor Unit

Connection of Outdoor units

Refrigerant piping Installation

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.28.58(1-1/8)

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)

For more information, refer accessory installation manual.

(Unit : mm(inch))

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

ENGLISH

Installation Manual 25

Refrigerant piping Installation

Installation of Outdoor Unit, HR Unit and Indoor Unit Refrigerant Pipe

3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pressure gas pipe and

high pressure gas pipe depending on status of refrigerant passing through the pipe.

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

For connection between indoor unit and HR unit, you must connect both liquid pipe and gas pipe from the HR

unit to the indoor unit. In this case, connect them to the indoor unit starting from No.1 connection port of the HR

unit (the port number is displayed on ports of the HR unit). Use auxiliary flare as annexed parts in connection to

the indoor unit.

Gas pipe

Liquid pipe

HR Unit

Low pressure

Gas pipe

Liquid pipe

High pressure

Gas pipe

CAUTION:

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).

Installation procedure for HR unit

Six-sided Nut

(M10 or M8)

Hanger metalHanger metal

Flat washerFlat washer

(M10)

Hanging boltHanging bolt

(M10 or M8)

Insulation

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

2. Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown

in the figure in the bottom, and fit the main unit to hang on the hanger metal.

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.

26 Outdoor Unit

Refrigerant piping Installation

Type of HR Unit

Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types

by the number of connectable indoor units.

Ex) Installation of 6 indoor units

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

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

Gas pipe Ø15.88

Liquid pipe Ø9.52

Brazing Type

Remove caps on

The brazing part.

Liquid pipe

Low pressure gas pipe

High pressure gas pipe

(Unit : mm(inch))

Joint Method of HR Unit (Big Duct : URNU76GB8-, URNU96GB8-)

Joint Method is required when B5/B8 chassis is installed. In Joint Method, two neighboring outlets of

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

HR Unit 2

HR Unit

1 2 3 4

(96k) (28k)

1 2 3 4

(76k)(21k)

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)

ENGLISH

Installation Manual 27

Refrigerant piping Installation

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)(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.

28 Outdoor Unit

Refrigerant piping Installation

[ Reducers for indoor unit and HR unit ]

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) Ø12.7(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)

(Unit : mm(inch))

ENGLISH

Installation Manual 29

Pipe connections between indoor and outdoor unit

Left Side Pipe Draw Out

Front Side Pipe Draw Out

Right Side Pipe Draw Out

• Pipe connections can be done on the front side or on the side according to the installation environments.

• Be sure to let 2.8psi(0.2kgf/cm

) 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.

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

Refrigerant Pipe

Regulator

Nitrogen

Direction

Taping

Valve

Removal Area for common

pipe bottom side connections.

Removal Area for Liquid/Gas pipe

bottom side connections.

1. Open the front panel.

2. Remove Brackets

3. Fix with only nut and washer as shown in the figure.

Brackets for Transportation

Washer

Nut

Pipe connections between indoor and outdoor unit

Preparation Work

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.

CAUTION

• Remove the brackets on the inverter compressor legs that were fixed to protect the unit during the transportation.

(If bracket is not removed, abnormal noise or vibration may occur.)

30 Outdoor Unit

Pipe connections between indoor and outdoor unit

■

Remove leakage prevention cap

• Remove the leakage prevention cap attached to the out-

door unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

1. Verify whether the Liquid/Low Pressure/High Pressure

Gas pipes are locked.

2. Extract remaining refrigerant or air inside using the ser-

vice port.

3. Remove the leakage prevention cap

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.

Liquid pipe

Low Pressure

Gas pipe

High Pressure

Gas pipe

Service Port

Leakage Prevention Cap

Pipe Drawing Out during Single / Series connection

Liquid pipe Low Pressure Gas pipe

High Pressure Gas pipe

Pipe Knock Out for

Liquid /Low Pressure

Gas pipes

Pipe Knock Out

for High Pressure

Gas pipe

ENGLISH

Installation Manual 31

Pipe connections between indoor and outdoor unit

Method of drawing out pipes on the bottom side

①

Drawing out common pipe through side panel

Figure of Sides when drawing out through bottom pipe

i) Single/Series outdoor units

(Draw out High Pressure

Gas pipe through bottom)

ii) Single/Series outdoor units

(Draw out High Pressure

Gas pipe through side panel)

Remove Pipe

Knock Out Hole

View without base pan

High Pressure Gas pipe Liquid pipe Low Pressure Gas pipes

Remove only liquid/gas pipe Knock Out

View without base pan

High Pressure Gas pipe Liquid pipe Low Pressure Gas pipes

②

Drawing out common pipe through bottom pipe

32 Outdoor Unit

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 piping system

ENGLISH

Installation Manual 33

Refrigerant piping system

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

➲

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

➲

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)

Longest pipe length * Equivalent pipe length

A+B+C3+k ≤ 150m(492ft)[200m**(656ft**)]

A+B+C3+k ≤ 175m(574ft)[225m**(738ft**)]

Longest pipe length after 1st branch

B+C3+k ≤ 40m(131ft)[90m**(295ft**)]

Difference in height(Outdoor Unit

↔

Indoor Unit)

H ≤ 110m(361ft)

Difference in height (Indoor Unit

↔

Indoor Unit)

h ≤ 15m(49ft)

Difference in height (Outdoor Unit

↔

Outdoor Unit)

h1 ≤ 5m(16ft)

Difference in height(HR Unit

↔

HR Unit)

a ≤ 15m(49ft) , b ≤ 5m(16ft)

"a", "b"

• * :

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

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)

< 184.8(630,700) Ø22.2(7/8) Ø44.5(1-3/4) Ø41.3(1-5/8)

< 224.0(764,400) Ø22.2(7/8) Ø53.98(2-1/8) Ø44.5(1-3/4)

34 Outdoor Unit

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.

➲

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

(**) 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)

❈

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

Refrigerant piping system

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)

8 6

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)18 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 30

Ø41.3(1-5/8) Ø44.5(1-3/4)

38 32

Ø34.9(1-3/8) Ø38.1(1-1/2)40 34

42 36

ENGLISH

Installation Manual 35

➲

Y branch, Header and HR unit connection pattern

Pattern 1 Pattern 2

Pattern 3

Pattern 5

HR1

48k 48k

2 3 4 5 6 7

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

1 2 3 4 5

Refrigerant piping system

36 Outdoor Unit

• Pipe installation from outdoor units to HR units

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

• Pipe installation from HR units to indoor units

: 2 pipes(Gas pipe, Liquid pipe)

HR1

Outdoor

Unit

Indoor Unit Y Branch pipe

Low pressure Gas pipe

High pressure Gas pipe

Liquid pipe

Gas pipe

Liquid pipe

Head Branch pipe

Indoor

Unit

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

Refrigerant piping system

ENGLISH

Installation Manual 37

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).

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

Refrigerant piping system

38 Outdoor Unit

Outdoor unit Connection

WARNING

• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of

the same size with A.

Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.

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

Ø28.58(1-1/8,

High

Pressure)

2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) : Ø34.9(1-3/8, gas

pipe), Ø19.05(3/4, liquid pipe),

Ø28.58(1-1/8,

Pressure 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),

Ø28.58(1-1/8,

Pressure liquid pipe) which is same with main pipe diameter.

[Example]

Do not choose the main pipe diameter by downward indoor unit total capacity but its outdoor unit model name.

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 22 HP (61.5 kW) outdoor unit to 120% of its system capacity (73.8 kW)

and branching 7k (2.1kW) indoor unit at the 1st branch

Main pipe diameter(22 HP outdoor unit): Ø28.58(1-1/8, Low pressure gas pipe), Ø15.88(5/8, Liquid pipe),

Ø22.2(7/8,High pressure gas pipe)

Pipe diameter between 1st and 2nd branch (71.7kW indoor units): Ø34.9(1-3/8, Gas pipe) Ø19.05(3/4, Liquid pipe) in

conformity with downward indoor units.

Since the main pipe diameter of 22HP outdoor unit is Ø28.58 (1-1/8, Low pressure gas pipe), Ø15.88(5/8, Liquid pipe),

Ø22.2(7/8, High pressure gas pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.

Indoor Unit Connection

➲

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

Indoor Unit capacity [kW(Btu/h)] Liquid pipe [mm(inch)] Gas pipe [mm(inch)]

≤ 5.6(19,100) 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)

≤ 28.0(95,900) Ø9.52(3/8) Ø22.2(7/8)

ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2 : Liquid pipe Ø9.52(3/8), Gas pipe

Ø15.88(5/8)

ARNU153BG*2, ARNU183BG*2, ARNU243BG*2 : Liquid pipe Ø9.52(3/8), Gas pipe Ø15.88(5/8)

Refrigerant piping system

ENGLISH

Installation Manual 39

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.

Pipe connection between outdoor units

(General Case)

Pipes between outdoor units are

2m(6.6ft) or less

Pipes between outdoor units are

2m(6.6ft) or longer

The maximum pipe length

after the first branching

between the outdoor units is

10m(33ft) or less

2m(6.6ft) or less

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

Examples of Wrong Pipe Connections

• If the distance between the outdoor units becomes more than 2m(6.6ft), apply Oil Traps between the gas pipes.

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

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

Refrigerant piping system

40 Outdoor Unit

• The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow toward

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

• Apply Oil Trap only to gas pipe as shown below when the length of the pipe between the outdoor units is over 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)

> 2m(6.6ft)

0.2m(0.66ft)

Oil Trap

* Install Oil trap if the ODU is at lower level than main piping.

Refrigerant piping system

ENGLISH

Installation Manual 41

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

• When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided.

Otherwise, the unit may not operate properly.

Toward indoor unit

(Example 1)

(Example 2)

(Example 3)

0.2m(0.66ft)

Toward indoor unit

Toward indoor unit Toward indoor unit

Oil Trap

Refrigerant piping system

42 Outdoor Unit

The amount of Refrigerant

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

Factor) value of indoor unit.

CAUTION

CF value of indoor unit (Unit : lbs)

Additional

charge(lbs)

otal liquid pipe

:Ø25.4mm(1inch)

otal liquid pipe

:Ø22.2mm(7/8inch)

otal liquid pipe

:Ø19.05mm(3/4inch)

otal liquid pipe

:Ø15.88mm(5/8inch)

otal liquid pipe

:Ø12.7mm(1/2inch)

otal liquid pipe

:Ø9.52mm(3/8inch)

1.1lbs

0.323(lbs/ft)

0.238(lbs/ft)

0.179(lbs/ft)

0.116 (lbs/ft)

0.015(lbs/ft)

0.079(lbs/ft)

0.041(lbs/ft)

otal liquid pipe

:Ø6.35mm(1/4inch)

Number of installed

HR units

CF value of

indoor unit

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

# : Use only ARNU153BGA2, ARNU183BGA2, ARNU243BGA2

##: Use only ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2

Refrigerant piping system

Capacity(Btu/h)

5k 7k 9k 12k 15k 18k 24k 28k 36k 42k 48k 54k 76k 96k

Type

Ceiling Consealed Duct(Low Static)

0.37 0.37 0.37 0.37 0.82 0.82

Ceiling Consealed Duct(High Static)

0.57 0.57 0.57

0.57

0.97

0.57

0.97

0.57

0.97

0.97 0.97 0.97 1.37 2.20 2.20

Wall Mounted(ARTCOOL Mirror) 0.53 0.53 0.53 0.53 0.62 0.62

1way Ceiling Cassette 0.44 0.44 0.44

2way Ceiling Cassette 0.35 0.35

4way Ceiling Cassette 0.40 0.40

0.55

1.06

0.55

1.06

0.71

1.06

0.71

1.41

1.06

1.41

1.06 1.41 1.41 1.41

ARTCOOL Gallery 0.22 0.22 0.22

Floor Standing 0.37 0.37 0.37 0.37 0.82 0.82

Ceiling & Floor 0.22 0.22

Ceiling Suspended 0.77 0.77

Console 0.37 0.37 0.37 0.37

Fresh Air Intake Unit 1.37 2.20 2.20

Heat Recovery ventilator(DX) 0.44 0.44 0.44

Hydro kit 3.53

Vertical AHU 1.04 1.04 1.57 2.00 2.00 2.00

ENGLISH

Installation Manual 43

Refrigerant Bottling

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

1. Installation of effective opening part

2. Reconfirmation of Outdoor Unit capacity and piping length

3. Reduction of the amount of refrigerant

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

- Change Indoor Unit type

: installation position should be over 2m(6.6ft) 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

Total amount of refrigerant in the system

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

- Add exact amount of refrigerant calculated by the installation pipe diameter length and the indoor combination.

Liquid pipe

Low Pressure

Gas pipe

High Pressure

Gas pipe

Ⓐ

Manifold Gauge

Ⓑ Low pressure side Handle

Ⓒ

High pressure side Handle

WARNING

- Pipe to be vacuumed : gas pipe, liquid pipe, common pipe

- If the refrigerant amount is not exact, it may not operate properly.

- If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit

performance may be caused.

≤ 0.44 ( kg / m

)

(0.028(lbs/ft

))

Refrigerant piping system

44 Outdoor Unit

Refrigerant pipe fitting

Caution

To Outdoor Unit

Sealed Piping

1. Use the following materials for refrigerant piping.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness :

Comply with the relevant local and national regulations for the designed pressure

3.8MPa(551psi).

We recommend the following table as the minimum wall thickness.

2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry

inert gas.

3. Use care to prevent dust, water or other contaminants from entering the piping during installation.

4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.

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

6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut

the connecting section and then use an adapter for connecting different diameters to connect the piping.

7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and

piping diameter). Failure to do so can result in equipment failure or a decline in heating/cooling

performance.

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

9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always

properly charge the unit. When servicing, always check the notes concerning both the piping length and

the amount of additional refrigerant.

10. Never use refrigerant to perform an air purge. Always evacuate by using a vacuum pump.

11. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling

performance, drip of condensate and other such problems.

12. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely

closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor

Units has been connected, a refrigerant leakage test has been performed and the evacuation process

has been completed.

13.

Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film

can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant oil.

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Y branch

ARBLB01621, ARBLB03321

ARBLB07121, ARBLB14521

Header

4 branch 7 branch 10 branch

Outer diameter

[mm(inch

)]

6.35

(1/4)

9.52

(3/8)

12.7

(1/2)

15.88

(5/8)

19.05

(3/4)

22.2

(7/8)

25.4

(1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

Minimum thickness

[mm(inch

)]

0.8

(0.0315)

0.8

(0.0315)

0.8

(0.0315)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

0.99

(0.039)

1.1

(0.043)

1.21

(0.048)

1.35

(0.053)

1.43

(0.056)

Refrigerant piping system

ENGLISH

Installation Manual 45

WARNING

Do not use anti-oxidants when brazing the pipe joints.

Residue can clog pipes and break equipment.

4 5

1 Refrigerant piping 4 Taping

2 Pipe to be brazed 5 Valve

3 Nitrogen 6 Pressure-reducing valve

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant

after perfect evacuation.

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

and the unit may be damaged.

- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after

branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the

installation pipe drawing.

Refrigerant piping system

46 Outdoor Unit

Y branch

To Outdoor Unit

To Branch Piping or Indoor Unit

Viewed from point A

in direction of arrow

Horizontal

plane

Within +/- 10

Facing

upwards

Facing

downwards

Within 3 Within 3

Insulator

(included with kit)

Liquid and gas

pipe joints

Insulator for

field piping

Tape

(field supply)

Header

To outdoor unit

To indoor 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.

• When the number of pipes to be connected is

smaller than the number of header branches,

install a cap to the unconnected branches.

• The indoor unit having larger capacity must be

installed closer to

Ⓐ

than smaller one.

• If the diameter of the refrigerant piping selected

by the procedures described is different from

the size of the joint,

the connecting section

should be cut with a pipe cutter.

ⓒ

Pipe cutter

Refrigerant piping system

Y Branch and Header Fitting

ENGLISH

Installation Manual 47

• 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.

Piched 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

Refrigerant piping system

48 Outdoor Unit

Thermal Insulation of Refrigerant piping

Heat

insulation

material

Outer

covering

Adhesive + Heat - resistant polyethylene foam +

Adhesive tape

Indoor Vinyl tape

Floor exposed Liquid-proof hemp cloth + Bronze asphalt

Outdoor Liquid-proof hemp cloth + Zinc plate + Oily paint

Note:

When using polyethylene cover as covering material, asphalt roof-

ing will not be required.

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

pressure pipe together.

At least 50mm

• Be sure to fully insulate connecting portion.

Liquid pipe

Gas pipe

Power lines

Finishing tape

Insulating material

Wrong

method

Correct

method

These parts are not insulated.

Communication lines

Liquid pipe

Communication lines

Separation

Gas pipe

Power lines

Insulating material

Heat insulation material

Pipe

Outer covering

(Wind the connection part and cutting part of

heat insulation material with a finishing tape.)

Power lines

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with

enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between Indoor Unit and

insulating material, and insulating materials themselves. When insulation work is insufficient, there is a

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

(3.3ft)

Inner wall (concealed)

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

Outer wall Outer wall (exposed)

Penetrations

Sleeve

Heat insulating material

Lagging

Caulking material

Band

Liquid-proofing layer

Sleeve with edge

Lagging material

Mortar or other incombustible caulking

Incombustible heat insulation material

When filling a gap with mortar, cover the

penetration part with steel plate so that

the insulation material will not be caved in.

For this part, use incombustible materials

for both insulation and covering.(Vinyl

covering should not be used.)

Refrigerant piping system

ENGLISH

Installation Manual 49

Selection of Y Branch and Header

Y Branch

Models

Low Pressure Gas Pipe High Pressure Gas Pipe

Liquid pipe

ARBLB01621

ARBLB03321

ARBLB07121

ARBLB14521

I.D15.88(5/8)

413(16-1/4)

390(15-11/32)

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)

O.D12.7(1/2)

I.D12.7

(1/2)

I.D12.7(1/2)

O.D12.7(1/2)

I.D12.7

(1/2)

I.D12.7

(1/2)

I.D12.7(1/2)

292(11-1/2)

281(11-1/16)

292(11-1/2)

281(11-1/16)

(2-29/32)

70(2-3/4)

70(2-3/4)70(2-3/4)

70(2-3/4)

I.D15.88(5/8)

I.D25.4(1)

O.D25.4(1)

I.D25.4(1)

O.D25.4(1)

80(3-5/32)

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

110(4-11/32)

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

110(4-11/32)

332(13-1/16)

321(12-5/8)

471(18-17/32)

517(20-11/32)

125

(4-29/32)

371(14-19/32)

394(15-1/2)

(3-9/32)

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)

376(14-13/16)

404(15-29/32)

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

120(4-23/32)

90(3-17/32)

I.D15.88(5/8)

1 3

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)

3 2

2 3 3

1 2

I.D15.88(5/8)

372(14-21/32)

351(13-13/16)

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.D22.2(7/8)

I.D22.2(7/8)

O.D15.88(5/8)

I.D6.35(1/4)

381(15)

409(16-3/32)

I.D15.88(5/8)

453(17-27/32)

491(19-11/32)

111

(4-3/8)

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.D31.8(1-1/4)

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

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

[Unit:mm(inch)]

I.D9.52(3/8)

I.D19.05(3/4)

I.D9.52(3/8)

O.D9.52(3/8)

Refrigerant piping system

50 Outdoor Unit

Header branch pipe

[Unit:mm(inch)]

4 branch

ARBL054

7 branch

ARBL057

4 branch

ARBL104

7 branch

ARBL107

10 branch

ARBL1010

10 branch

ARBL2010

Models Gas pipe Liquid pipe

360(14-5/32)

540(21-1/4)

120(4-23/32)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID19.05(3/4)

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)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

400(15-23/32)

160(6-5/16)

ID15.88(5/8)

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)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

120

(4-23/32)

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)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID12.7(1/2)

160(6-5/16)

580(22-27/32)

ID19.05(3/4)

ID15.88(5/8)

ID12.7(1/2)

ID15.88(5/8)

ID12.7(1/2)

ID22.2(7/8)

ID28.58(1-1/8)

ID25.4(1)

700(27-9/16)

120(4-23/32)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

ID9.52(3/8)

ID6.35(1/4)

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

ID15.88(5/8)

ID12.7(1/2)

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)

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)

120

(4-23/32)

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)

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)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

150

(5-29/32)

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)

Refrigerant piping system

ENGLISH

Installation Manual 51

Leak Test and Vacuum drying

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

(1) Leak test

Leak test should be m

ade by pressurizing nitrogen gas to 3.8MPa(551psi). If the pressure does not drop for 24

hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method,

refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize Liquid pipe,

Low Pressure Gas pipes, High Pressure Gas pipe)

The test result can be judged good if the pressure has not be reduced after leaving for about one day after com-

pletion of nitrogen gas pressurization.

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 1°C of temperature difference.

Correction= (Temp. at the time of pressurization – Temp. at the time of check) X 0.1

For example: Temperature at the time of pressurization 3.8MPa(551psi) is 27 °C

24 hour later: 3.73MPa(541psi), 20°C

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.

Refrigerant piping system

52 Outdoor Unit

(2) Vacuum

Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vac-

uum pump commonly used for Liquid pipe, Low Pressure Gas pipes, High Pressure Gas pipe. (Make

Vacuum from Liquid pipe, Low Pressure Gas pipes, High Pressure Gas 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, 5Torr, -755mmHg).

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

tem 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.

2. 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 dry-

ing). If the system cannot be evacuated to-100.7kPa(-14.6psi) within 2 hrs, repeat the steps of vacuum

break and its drying.

Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.

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.

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.)

Refrigerant piping system

ENGLISH

Installation Manual 53

Vacuum Mode

This function is used for creating vacuum in the system after compressor replacement, ODU parts replace-

ment or IDU addition/replacement.

Master unit PCB DIP switch on

Switch on : 10, 12, 13

Vacuum mode setting

ODU valve open,

Main EEV, SC EEV open

IDU EEV open

HR unit valve open, SC EEV open

ODU power reset

Press the black button Main PCB (5 sec.)

Vacuum mode setting method Vacuum mode cancellation method

Master unit PCB DIP switch off

Switch off : 10, 12, 13

Power reset

Vacuum mode cancellation

CAUTION

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

Refrigerant piping system

54 Outdoor Unit

Electrical Wiring

Caution

Electrical Wiring

Remote

control

Remote

control

Remote

control

Remote

control

Indoor

Unit

Outdoor Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

CAUTION

Be sure to connect the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe,

lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

CAUTION

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.

1. Follow ordinance of your governmental organization for technical standard related to electrical equipment,

wiring regulations and guidance of each electric power company.

2. Install the Outdoor Unit communication line away from the power source wiring so that it is not affected by

electric noise from the power source. (Do not run it through the same conduit.)

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

4. 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.

5. Never connect the main power source to terminal block of communication line. If connected, electrical parts will be

burnt out.

6. Use 2-core shield cable for communication line.(O mark in the figure below) If communication lines of different

systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause

erroneous operations. ( mark in the figure below)

7. Only the communication line specified should be connected to the terminal block for Outdoor Unit communication.

2-Core Shield Cable Multi-Core Cable

ENGLISH

Installation Manual 55

Electrical Wiring

Master Slave1 Slave2

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Outdoor Unit

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

Remote

controller

Remote

controller

Indoor

Unit

Indoor

Unit

2-Core Shield Cable Multi-Core Cable

CAUTION

• Use the 2-core shield cables for communication lines. Never use them together with power cables.

• The conductive shielding layer of cable should be grounded to the metal part of both units.

• Never use multi-core cable

• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate power

factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never install a phase

leading capacitor.

• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will be

reduced.

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 wiring which is the same thickness, do as shown in the figure below.

• For wiring, use the designated power wire and connect firmly, then secure to prevent outside

pressure being exerted on the terminal block.

• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head

will strip the head and make proper tightening impossible.

• Over-tightening the terminal screws may break them.

◆

Precautions when laying power wiring

Round pressure terminal

Power wire

Use round pressure terminals for connections to the power

terminal block.

56 Outdoor Unit

Electrical Wiring

- Remove all of the screws at front panel and remove the panel by pulling it forward.

- Connect communication line between main and sub outdoor unit through

the terminal block.

- Connect communication lines between outdoor unit and indoor units

through the terminal block.

- When connecting communication line between outdoor unit and indoor

units with shielded wire, connect the shield ground to the earth screw.

Front Panel

UX3

UX2

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Take care of the phase

sequence of 3-phase 3-wire

power system

Take care of the phase

sequence of 3-phase 3-wire

power system

Reactor

Fan PCB

Noise filter

Bridge diode

Magnet switch

Inverter PCB

Transformer(460V only)

Reactor

Transformer(460V only)

Main PCB

SUB PCB

Main PCB

SUB PCB

Control box and connecting position of wiring

ENGLISH

Installation Manual 57

Electrical Wiring

Communication and Power Lines

1) Communication cable

• Type : shielding wire

• Use wires of size : over 1.0~1.5mm

• Maximum allowable line length: under 1,000m(3,281ft)

2) Remote control cable

• Type : 3-core cable(shielding wire)

3) Central control cable

4) Separation of communication and power lines

• If communication and power lines are run alongside each other then there is a strong likelihood of

operational faults developing due to interference in the signal wiring caused by electrostatic and

electromagnetic coupling.

The tables below indicates our recommendation as to appropriate spacing of communication and power

lines where these are to be run side by side

Note:

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

100m(328 ft) the figures will have to be recalculated in direct proportion to the additional length of line

involved.

2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the

table should be increased.

• If the lines are laid inside conduits then the following point must also be taken into account when grouping

various lines together for introduction into the conduits

• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same

• In the same way, when grouping the lines power and signal lines should not be bunched together.

Current capacity of power line Spacing

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

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

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

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

100V or more

CAUTION

■

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

apparatus must be carried out by a qualified person.

Product type Wire type Diameter

ACP&AC Manager (2-shielding wire,2-core wire) 1.0~1.5mm

AC Smart (2-shielding wire,2-core wire) 1.0~1.5mm

Simple central controller (2-shielding wire,2-core wire) 1.0~1.5mm

58 Outdoor Unit

Wiring of main power supply and equipment capacity

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

2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceed-

ing with the wiring and connections.

3. The wire 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%.

4. Specific wiring requirements should adhere to the wiring regulations of the region.

5. Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene

sheathed flexible cord.

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

the power supply.

WARNING

• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring reg-

ulations and guidance of each electric power company.

• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If con-

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

• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include

some amount of direct current.

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.

Electrical Wiring

ENGLISH

Installation Manual 59

Field Wiring

1. 208/230V

Example Connection of Communication Cable

1 Outdoor Unit-3Ø, 208/230V

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

R(L1) S(L2) T(L3)

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)

The GND terminal at the main PCB is a ‘-’ terminal for Dry contact, it is not the point to make

ground connection.

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

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

A B

Electrical Wiring

60 Outdoor Unit

Electrical Wiring

■ 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

aster

]

[Sla

Power L

Wire

Power supply

3 Phase 3 Wires

60Hz 208/230V

Power supply

1 Phase 60Hz

208/230V

R(L1) S(L2) T(L3)

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

(Main Switch)

[Slave]

Switch

ELCBELCB

Pull box

(Installer option)

Pull box

(Installer option)

Pull box

(Installer option)

Power Line

(2 Wires Cable)

HR unit

R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)

ELCB

L(L1) N(L2)

2 Outdoor Units-3Ø, 208/230V

ENGLISH

Installation Manual 61

Electrical Wiring

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

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)

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Slave

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

A B

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

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

62 Outdoor Unit

Electrical Wiring

■

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)

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)

Communica

(3 W

(2 Wire

Wires Cable)

[

Power

(2 Wires

aster

]

[Slav

Power Line

2 Wires Ca

)

R(L1) S(L2) T(L3)

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

R(L1) S(L2) T(L3) R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)

ELCB

L(L1) N(L2)

3 Outdoor Units-3Ø, 208/230V

ENGLISH

Installation Manual 63

Electrical Wiring

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

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)

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Slave1

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

Slave2

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

A B

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

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-

uct is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

64 Outdoor Unit

Electrical Wiring

2. 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 connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

R(L1) S(L2) T(L3)

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)

The GND terminal at the main PCB is a ‘-’ terminal for Dry contact, it is not the point to make

ground connection.

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

A B

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

ENGLISH

Installation Manual 65

Electrical Wiring

■ 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)

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

R(L1) S(L2) T(L3)

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

R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)

ELCB

L(L1) N(L2)

2 Outdoor Units-3Ø, 460V

66 Outdoor Unit

Electrical Wiring

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

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)

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Slave

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

A B

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

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the

product is operating, attach a reversed phase protection circuit locally.

Running the product in reversed phase may break the compressor and other parts.

ENGLISH

Installation Manual 67

Electrical Wiring

■

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)

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

R(L1) S(L2) T(L3)

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

R(L1) S(L2) T(L3) R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)

ELCB

L(L1) N(L2)

3 Outdoor Units-3Ø, 460V

68 Outdoor Unit

The GND terminal at the main PCB is a ‘-’ terminal for dry contact.

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)

Between Indoor and Master Outdoor unit

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Master

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

Slave1

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

HR unit

A B

Slave2

Outdoor Unit

SODU B SODU A IDU IDU INT B INT A

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

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,

Communication disorder by noise effect and motor current leakage (without connection to pipe).

• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the

equipment utilizing the multiple power sources.

• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-

uct 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

Installation Manual 69

Example Connection of Communication Cable

[BUS type]

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

unit.

[STAR type]

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

cable is installed like below figure(STAR type).

HR unit

Electrical Wiring

70 Outdoor Unit

UX2 Chassis Wire Connection

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Left Side

Ground Cable

Communication line

Power/Ground lines

Over 50mm Gap

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Right Side

Ground Cable

Communication line

Power/Ground lines

Over

50mm Gap

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Front Side 1

Main Power

Terminal Block

Main Power

Terminal Block

Insulation sleeves attachments

Fix firmly not to be displaced

Ground CableGround Cable

ODU-IDU

Communication line

ODU-ODU

Communication line

ODU-ODU

Communication line

Power/Ground lines

Over 50mm Gap

Ground Cable

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Front Side 2

Main PCB ConnectionMain Power Connection

Electrical Wiring

ENGLISH

Installation Manual 71

UX3 Chassis Wire Connection

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Left Side

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Right Side

Ground Cable

Power/Ground lines

Over

50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Front Side 1

Insulation sleeves attachments

Ground Cable

Fix firmly not

to be displaced

Main Power Terminal BlockMain Power Terminal Block

ODU-ODU

Communication line

ODU-ODU

Communication line

ODU-IDU

Communication

line

Ground Cable

Power/Ground lines

Over 50mm Gap

Communication line

Main Power Terminal BlockMain Power Terminal Block

Insulation sleeves attachmentsInsulation sleeves attachments

Front Side 2

Main PCB ConnectionMain Power Connection

Electrical Wiring

72 Outdoor Unit

DIP Switch Setting

◆

Location of setting Switch

7 - Segment

SW02B

(AUTO ADDRESS)

SW03B

(DATA CONFIRM)

DIP-SW01 DIP-SW02

■

SUB PCB

Electrical Wiring

ENGLISH

Installation Manual 73

◆

Checking according to dip switch setting

1. You can check the setting values of the Master outdoor unit from the 7 segment LED.

Power reset is required every time the DIP switch setting is changed

◆

Checking the setting of the Master unit

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 28HP)

Master model code

➔

Slave1 model code

➔

Slave2 model code

➔

total capacity

➔

190

1 ~255 : Master model code

1 ~255 : Slave1 model code

1 ~255 : Slave2 model code

8~42HP : HP number(sum of master capacity and slave capacity)

No display : cooling only 2 : heat pump / heat recovery

25 : normal

190 : Model Type (ARUB***DT3), 170 : Model Type(ARUB***BT3)

Example) 28HP (ARUB***DT3), R410A

193

→

193

→

190

CAUTION

Product may not properly operate if the relevant DIP switch is not properly setup.

}

Refer to table code

Model Code

Model Code Unit (HP) Unit Ref.

190 8

191 10

192 12

193 14

Master &

Slave

R410A

Electrical Wiring

74 Outdoor Unit

◆

Setting the DIP switch

• If you set the Dip switch when power is on, the changed setting will not be applied immediately.

The changed setting will be enabled only when Power is reset or by pressing Reset button.

CAUTION

1. ‘X’ mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.

2. If the applicable dip switch is not set properly, the product may not work properly.

3. When executing the test operation, check the operating condition of the indoor unit and only execute the operation

when all indoor units are stopped.

4. Auto test operation function does not work for the product where only one indoor unit is connected for use.

Electrical Wiring

Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

●

● ● ●

●

ⅹ

●

ⅹ

● ● ⅹ

●

ⅹ ⅹ

ⅹ

● ⅹ

● ●

ⅹ

●

ⅹ

●

ⅹ ⅹ

● ●

ⅹ

●

ⅹ

●

● ● ●

●

ⅹ

●

ⅹ

ⅹ ⅹ ⅹ ⅹ ⅹ ⅹ

●

ⅹ

●

ⅹ ⅹ ⅹ ⅹ

●

ⅹ ⅹ

●

ⅹ ⅹ ⅹ

●

ⅹ

● ●

ⅹ ⅹ ⅹ

●

ⅹ

● ●

ⅹ

● ●

ⅹ

●

● ● ● ●

● ●

ⅹ

●

ⅹ ⅹ

● ●

ⅹ

● ● ●

●

ⅹ

● ●

● ● ●

● ⅹ

● ●

ⅹ ⅹ

● ⅹ

ⅹ

●

● ●

Function

ODU

setting

Inverter backup

Const. 1 backup

Const. 2 backup

Unit backup

Night low noise operation(cooling, heating)

Night low noise operation(cooling only)

Snow removal function

Forced defrost

Snow removal + Forced defrost

Non-operation indoor unit EEV adjustment

Indoor unit target subcooling/overheating adjustment

Operation indoor unit EEV adjustment

Real-time sensor monitoring

Only overall defrost

Static pressure mode

Pump out

Pump down

Vacuum mode

Forced oil return operation

4way valve manual operation-upper, low OFF

4way valve manual operation-upper ON, low OFF

4way valve manual operation-upper OFF, low ON

4way valve manual operation-upper, low ON

Auto pipe detection mode 1

Auto pipe detection mode 2

Indoor unit pipe display

No. Indoor unitàs connected a branch of HR Unit

Auto charging

Refrigerant Checking Function

Intergrated test operation function (Heating)

Intergrated test operation function (Cooling)

Heating Capacity up

IDU Fan RPM Control

ODU Address setting

Master unit

Slave1 unit

Slave2 unit

Slave3 unit

ENGLISH

Installation Manual 75

◆

Switch for setup of HR Unit

1. Main function of SW02M

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

Auto Manual

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)

#1 heating valve LED(red)

#4 valve housing

Switch No.1 OnSwitch No.1 Off

2) Setting the zoning control

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

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

76 Outdoor Unit

HR Unit PCB

3) Selection of the model of the HR unit

❈

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

WARNING

• 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

(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

ENGLISH

Installation Manual 77

✽

Y branch pipe

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

Models

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

Large capacity indoor unit

Indoor Unit

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))

Note:

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

HR Unit PCB

78 Outdoor Unit

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

3. SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)

1) Normal setting (Non-Zoning setting)

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

- SW01M: selection of the valve to address

SW03M: increase in the digit of 10 of valve address

SW04M: increase in the last digit of valve address

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

ferently at its wired remote control.

A B A B A B

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

Installation Manual 79

2) Zoning setting

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

- SW01M : selection of the valve to address

SW03M : increase in the digit of 10 of valve address

SW04M : increase in the last digit of valve address

SW05M :Rotary S/W

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

differently at its wired remote control.

S/W No. Setup

No.1 Manual addressing of valve #1

No.2 Manual addressing of valve #2

No.3 Manual addressing of valve #3

No.4 Manual addressing of valve #4

SW03M Increase in the digit of 10 of valve address

SW04M Increase in the last digit of valve address

SW05M Manual addressing of zoning indoor units

SW01M

SW03M

SW04M

SW05M

HR Unit PCB

80 Outdoor Unit

7 - Segment

SW02B

(AUTO ADDRESS)

SW03B

(DATA CONFIRM)

DIP-SW01 DIP-SW02

■

SUB PCB

1) Auto addressing for indoor unit

• The address of indoor units would be set by

auto addressing

1) Wait for 3 minutes after applying power supply

(Master and Slave Outdoor unit, Indoor unit).

2) Press the switch of the outdoor unit for 5~10

seconds until display 88.(SW02B).

3) A "88" is indicated on 7-segment LED of the

outdoor unit PCB.

4) For completing addressing, 2~7 minutes are

required depending on numbers of indoor unit

connection set.

5) Numbers of inddor unit connection set whose

addressing is completed are indicated for

30seconds on 7-segment LED of the oudoor

unit PCB.

6) After completing addressing, address of each

indoor unit is indicated on the wired remote

control display window. (CH01, CH02, CH03,

........ CH06: Indicated as numbers of indoor

unit connection set).

1) Auto addressing for indoor unit

2) Auto pipe detection

3) Manual pipe detection(Execute in case of Auto pipe detection failure)

• Turn off all the indoor units before auto addressing.

If indoor unit is operated, auto addressing would not be completed.

2) Auto pipe detection

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

2) Confirm that the setting of No.2, 3 of SW02M corresponds with the number of indoor units.

3) Reset the power of HR unit PCB

4) Turn on the No. 17 DIP S/W of main unit PCB when outdoor temperature is below 15℃(59℉)

Turn on the No. 14, 17 DIP S/W of main unit PCB when outdoor temperature is over 15℃(59℉)

5) Reset the power of outdoor unit.

6) Wait for 3 minutes.

7) Press SW03B of the outdoor unit main PCB for 5 Seconds.

8) The number of connected HR unit is displayed.

Ex) In case of installing four HR units : 04

9) Operated after 88 is displayed on 7-SEG of the outdoor unit main PCB.

CAUTION

• In replacement of the indoor unit PCB, always perform Auto 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.

• Auto addressing is only possible on the master Unit.

• Auto addressing has to be performed after 3 minutes to improve communication.

Auto Addressing

HR Unit PCB

ENGLISH

Installation Manual 81

3) Manual pipe detection

1) Enter the central control address into each indoor unit using its wired remote control.

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

3) Reset the power of HR unit PCB.

4) On the HR unit PCB, manually set address of each valve of the HR unit to the central control address of the

indoor unit connected to the valve.

5) Reset the power of outdoor unit PCB.

6) The number of the indoor unit installed is displayed after about 5 minutes.

Ex) HR

➠

The number of the indoor

7) Reset the power of outdoor unit PCB, HR unit.

8) Manual pipe detection is completed

WARNING

1. In case that central controller is not installed, remain the address data after installer sets central

control address as he wants

2. In case that central controller is installed, there would be central control address in wired remote

control of indoor unit.

In this case, set the HR unit manual pipe address according to central control address of indoor unit.

4. Pipe which is not connected with indoor unit should be set different address with pipe Connected

with indoor unit.

(If addresses are piled up, corresponding valve is not working.

5. If you want to change the setting of manual pipe, you should do it on HR unit PCB.

6. If an error occurred, it means that manual pipe setting is not completed.

7. During 5 minutes after pipe detection is completed, do not turn off the main unit PCB to save the

result of pipe detection automatically.

WARNING

1. Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB

is replaced.

• Operation error occurs unless power is applied to the indoor and HR units.

Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are different.

3. When auto pipe detection fails, complete it with manual pipe detection (see Manual pipe detection).

When auto pipe detection addressing is completed normally, manual pipe detection is not required.

5. If you want to do auto pipe detection again after auto pipe detection fails, do after reset of outdoor

unit by all means.

6. During 5 minutes after pipe detection is completed, do not turn off the main unit PCB to save the

result of pipe detection automatically.

10) Pipe detection proceed.

11) 5~30 minutes are required depending on the number of the indoor units and outdoor temperature.

12) The number of the indoor units installed is displayed on 7-SEG of the outdoor unit main PCB for about 1

minute

• For a HR unit, the number of the indoor units connected to each HR unit is displayed.

•

'200' is displayed in case of auto pipe detection error, and auto detection is completed after '88' is disappeared.

❈

Auto pipe detection function : the function that sets connection relationship automatically between the

indoor unit and HR unit.

HR Unit PCB

82 Outdoor Unit

• When auto addressing has completed, number of

indoor unit connected to outdoor unit will be

displayed on 7 segment LED for 30 seconds

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 auto addressing is completed normally.

Auto addressing start

Waiting 3 minutes

Power On

Press RED Button for

10~15sec. (SW02B)

7-segment LED = 88

The number of the indoor

units connected is

displayed at 7-SEG of the

outdoor unit main PCB

after 2~7 minutes

The number of HR units

connected is displayed

at 7-SEG of the outdoor

unit main PCB

7-segment LED

YES

NO Check the connections

of Communication line

= 88

Don’t press RED Button

(SW02B)

HR Unit PCB

Flow chart of auto-addressing for indoor units

ENGLISH

Installation Manual 83

Completion of auto pipe detection

❇ 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.

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.

Confirm the DIP S/W of

DIP-SW01,02

outdoor PCB

Outdoor temperature is below 15℃(59℉) : 17 ON

Outdoor temperature is over 15℃(59℉) : 14,17 ON

In case of changing

DIP-SW01,02 S/W

outdoor unit, reset the power of

outdoor unit main PCB

Press SW03B of the outdoor unit main

PCB for 5 seconds

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.

Wait for 3 minutes

YES

HR Unit PCB

Flow chart of auto addressing for pipe detection

84 Outdoor Unit

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

Flow chart of manual addressing for pipe detection

ENGLISH

Installation Manual 85

(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.

- Above setup must be done for all HR unit valves.

- The valve that is not connected with any indoor unit should be addressed with any other number than used

address numbers of the valves connected with indoor units.

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

• Operation: None

• Display: None

No.

Display and setup Setup and Contents

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

• Display: Existing value saved in EEPROM is displayed in

7-SEG.

• Operation: Set the digit of 10 to the number in Group High data

of the wired remote control connected to the corresponding

indoor unit to the valve #1 by pressing left tack S/W.

• Display: Digit increasing with the times of pressing tack S/W is

displayed in left 7-SEG

• Operation: Set the digit of 1 to the number in Group Low data

of the wired remote control connected to the corresponding

indoor unit to the valve #1 by pressing right tack S/W.

• Display: Digit increasing with the times of pressing tack S/W is

displayed in right 7-SEG

• Operation: Turn dip S/W No.1 off to save the address of

valve #1

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

7-SEG SW01M SW03M SW04M

HR Unit PCB

Example of manual valve addressing (Non-Zoning setting)

86 Outdoor Unit

(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 con-

trols 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.

In case of addition of indoor units to same port, increases 1 with the rotary switch and sets number with tact switch.

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.

Setting the rotary switch on original condition(HR unit number set conditions) after all finishing a piping setting.

The rotary switch set value of above number of indoor units which is connected with FF and prevents a malfunction.

(Example: The case where 3 indoor units is connected in piping 1, sets from rotary switch 0,1,2 and 3,4,5,6,7 with FF set)

•

Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differently at its wired remote

control.

- Above setup must be done for all HR unit valves.

The valve that is not connected with any indoor unit should be addressed with any other number than used address

numbers of the valves connected with indoor units.(The valves does not work if the address numbers are same.)

• Operation: None

• Display: None

No.

Display and setup Setup and Contents

• 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 connect-

ed to the corresponding indoor unit to the

valve #1 by pressing left tack S/W.

• Display : Digit increasing with the times of pressing tack

S/W is displayed in left 7-SEG.

• Operation : SW05M : 1

• Display : Display former value.

•

Operation : Setting No. using SW03M and SW04M,

SW05M : 1

• Display : Display setting value.

• Operation : Turn dip S/W No.1 off to save the address of

valve #1

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

• Operation : Return valve of addressing HR unit.

• Display : None

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

7-SEG SW01M SW03M SW04M

SW05M

HR Unit PCB

Example of manual valve addressing (Zoning setting)

ENGLISH

Installation Manual 87

ROTARY 01 ROTARY 02

• Operation: Turn dip S/W No.1 on.

• Display: "11" is displayed in 7-SEG

No.

Display and Setup Setup and Contents

• Operation: Turn dip S/W No.1 on.

• 7-SEG disappeared

7-SEG SW01M

• Operation: more than 2 dip switches turned on.

• Display: "Er" is displayed in 7-SEG

No.

Display and Setup Setup and Contents

7-SEG SW01M

(In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR 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.

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

Method of checking the pipe detection result at HR unit

Method of checking the pipe detection result at outdoor unit

Identification of Manual Valve ID (Address)

88 Outdoor Unit

Setting method of Master indoor unit in zoning

1. Turn dip switch 5,6,10 on at system off.

2. Set the left Ratary switch for HR unit.(Rotary switch No. "0" HR unit No. "1")

3. Set the right Ratary 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-addressing.

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

HR Unit PCB

7 segment

ENGLISH

Installation Manual 89

◆

Group Number setting for Indoor Units

①

Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.

② The communication lines connected to INTERNET terminal should be connected to central control of

Outdoor unit with care for their polarity( A

→

A, B

→

B )

③ Turn the whole system on.

④

Set the group and Indoor Unit number with a wired remote control.

⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

B(D) A(C) B A

SODU B SODU A IDU IDU INT B INT A

Outdoor Units

Terminal block on the main PCB

Group recognizing the simple central controller

No.0 group (00~0F)

No.1 group (10~1F)

No.2 group (20~2F)

No.3 group (30~3F)

No.4 group (40~4F)

No.5 group (50~5F)

No.6 group (60~6F)

No.7 group (70~7F)

No.8 group (80~8F)

No.9 group (90~9F)

No. A group (A0~AF)

No. B group (B0~BF)

No. C group (C0~CF)

No. D group (D0~DF)

No. E group (E0~EF)

No. F group (F0~FF)

WARNING

Valve (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

• Valve address and central control address of its corresponding indoor unit should be set identical in

manual addressing.

Group Number Setting

HR Unit PCB

90 Outdoor Unit

Test Run

Check to see whether there is any refrigerant leakage, and slack of power or communication cable.

Confirm that 500 V megger shows 2.0 MΩ or more between power supply terminal block and ground.

Do not operate in the case of 2.0 MΩ or less.

NOTE: Never carry out megaohm check over terminal control board. Otherwise the control board

would be broken.

Immediately after mounting the unit or after leaving it turned off for an extended length of time,

the resistance of the insulation between the power supply terminal board and the ground may

decrease to approx. 2.0 MΩ as a result of refrigerant accumulating in the internal compressor.

If the insulation resistance is less than 2.0 MΩ, turning on the main power supply and

energizing the crankcase heater for more than 6 hours will cause the refrigerant to evaporate,

increasing the insulation resistance.

Check if high/low pressure common pipe, liquid pipe and gas pipe valves are fully opened.

NOTE: Be sure to tighten caps.

Check if there are any problems in automatic addressing or not:

Check and confirm that there are no error messages in the display of indoor units or remote controls

and LED in outdoor units.

CAUTION

when applying main power of the Multi V

• Always apply main power of the outdoor unit during use of product

(cooling season/heating season).

• Always apply power 6 hours in advance to heat the crank case heater where performing test run

after installation of product. It may result in burning out of the compressor if not pre-heat the

crank case with the electrical heater for more than 6 hours.(In case of the outdoor temperatue

below 10℃(50℉))

Functions of each Test run steps

Step 0. Verify the command signals

Select function to be executed during the test run

Step 1. Examine Sensor

Examine the normal operations of the sensors attached to the outdoor/indoor units

Step 2. Refrigerant Automatic Recharge

If additional bottling of the refrigerant is needed, operate to perform this automatically.

Step 3. Automatic Refrigerant Decisions

Inspect if the bottled refrigerant in the system has adequate quantity.

Step 4. Integrated Test Run

Process to verify the normal operations of the parts attached to the system, and verify normal operation of the sys-

tem.

Step 5. Real-time sensor checking

Check the sensors while operating in real-time.

❈

Gas pipes and Liquid pipes connections inspection

: Inspect whether the gas pipes and Liquid pipes are connected to each other.

Test Run

Checks Before Test Run

ENGLISH

Installation Manual 91

Test Run

The phenomena from master component failure

When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trouble

shooting guide is in the service manual

Compressor

Outdoor

fan

Outdoor

EEV

Not operating

Stop during running

Abnormal noise

during running

High pressure error

at cooling

Heating failure,

frequent defrosting

No operating sound

at applying power

Heating failure,

frozen outdoor heat

exchanger part

Low pressure error

or discharge

temperature error

Motor insulation broken

Strainer clogged

Oil leakage

Motor insulation failure

R(L1)-S(L2)-T(L3)

misconnection

Motor failure,

bad ventilation around

outdoor heat exchanger

Bad connector contact

Coil failure

EEV clogged

Check resistance between terminals and

chassis

Change strainer

Check oil amount after opening oil port

Check resistance between terminals and

chassis

Check compressor R(L1)-S(L2)-T(L3)

connection

Check the outdoor fan operation after being

turned the outdoor units off for some time.

Remove obstacles around the outdoor units

Check connector

Check resistance between terminals

Service necessary

Component Phenomenon Cause Check method and Trouble shooting

How to cope with Test Run Abnormality

92 Outdoor Unit

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or

not. 3 indoor temperature sensors, 10 outdoor temperature sensor

Note 1)

, 2 outdoor pressure sensors.

This function is used along with Refrigerant Auto recharge and Quantity auto decide function.

It is used for judging sensor abnormality.

Note2)

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

- Setting1

(Refrigerant Auto Recharge)

- Setting2

(Refrigerant Quantity Auto Decide)

- Setting3

(Integrated Test Run - cooling)

- Setting4

(Integrated Test Run - heating)

Sensor Checking Function

Test Run

ENGLISH

Installation Manual 93

Start

YES

3 minutes

past after power

reset

DIP switch set

Press black button

for 2 seconds

Sensor Normal

Heat Pump?

Press black button

for 5 seconds

Display Error

Press black button for 2 seconds

End

Data Reset and Wait

All DIP switches OFF and press black

button for 2 seconds

Setting 1 Setting 2 Setting 3 Setting 4

Note 3)

Press black button for

5 seconds

Setting 1 Setting 2 Setting 3 Setting 4

Refrigerant

Auto Recharge

Refrigerant

Auto decide

Cooling

Heating

: Heat

Recovery

Start Inspection of each Function

Note 1. Outdoor temperature number is different according to each chassis.

Note 2. Please check the sensor that is found abnormal.

Note 3. Each step is displayed on the Main PCB LED.

Note 4. Please refer to the sensor error descriptions on the next page.

WARNING

1. Please confirm if auto addressing function was executed. (Check the number of installed indoor units)

2. Error may occur when the sensor is normal according to the installed location and the temperature

conditions. When error occurs, please check each sensor and decide faultiness.

Chassis UX2(1comp) UX3(2 comp)

No. of sensor 6 7

Test Run

94 Outdoor Unit

Display codifica errore controllo sensori

In case error occurs during sensor checking process, error display is as shown below.

Following contents are displayed one after the other on the main PCB of master Unità esterna.

ex) Indoor unit No. 2 Pipe inlet temperature sensor

error

ex) Outdoor Master Unit Liquid pipe temperature

sensor error

ex) IDU No.2 Pipe inlet temperature sensor error and Master

ODU suction temperature sensor, Slave 3 high pressure

sensor error

Caution

1. Up to 5 number of errors is displayed continuously and

repeatedly. In case 5 error occurs, again perform sensor

checking after solving errors.

2. IDU in which error occurred operates air circulation mode.

........

Indoor sensor error :

319

Outdoor sensor error :

309

Displaying error content

* 5 number of errors is displayed

continuously and repeatedly.

No. Classification

1 Pipe In Temperature

2 Pipe Out Temperature

3 Indoor Air Temperature

Table 2. IDU Sensor Error Code

Table 1. ODU Sensor Error Code

No. Sensor type

Displaying error content

■

Indoor unit error display

1.1st and 2nd number represents indoor unit number.

2. Last number represents sensor.

1: Pipe inlet temperature sensor

2: Pipe outlet temperature sensor

3: Air temperature sensor

■

Displaying outdoor unit error

1. 1st and 2nd number represents error content(code).

2. Last number represents outdoor unit number.

1 : Master

2 : Slave 1

3 : Slave 2

Indoor unit number follows auto addressing number.

(To check the LGMV Data)

Outdoor Air Temperature

Heat Exchanger Temperature

Liquid Pipe Temperature

SC pipe out

Suction Temperature

Inverter Comp. Discharge Temperature

Constant Comp.1 Discharge Temperature

Constant Comp.2 Discharge Temperature

High Pressure

Low Pressure

IPM temperature

Test Run

ENGLISH

Installation Manual 95

This function charges appropriate amount of refrigerant automatically through cycle operation.

It can be used when refrigerant amount Isn't certain because of SVC and leakage.

Wait for 3 min. after power reset

Start

Set the Dip S/W.

(Refer to DIP S/W setting)

Press the black button.

(Press until ‘508’ is displayed)

Press the black button.

Is it necessary to

charge refrigerant?

Press the black button for 2 sec. after turning off

all of dip S/W.

Yes

IDU runs with cooling mode In designated order.

Press the black button

IDU and ODU are turned off when Auto Charging

is completed. Close the valve.

Press the black button

*1)

Refrigerant Auto

Charging Process

Main PCB

SW01V

Completed.

*2)

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Note

1. After inst

alling the

refrigerant chargin

g dev

ice, as shown in

figur

e, open the valve

. In case air tem

perature

is out of guarantee

d te

erature, it may end w

ithout

performing Auto c

harging

3. Re

frigerant ch

arging Time

may change acc

ording t

o the charging amou

nt.

(Ab

t. 1.5min/lbs)

Refrigerant Auto Charging (Setting 1)

Test Run

96 Outdoor Unit

Procedure

1. Arrange manifold,capillary assembly, refrigerant vessel and scale

2. Connect manifold to the gas pipe service valve of ODU as shown in the figure.

3. Connect manifold and Capillary tube.

Use designated capillary assembly only.

If designated capillary assembly isn't used, the system may get damaged.

4. Connect capillary and refrigerant vessel.

5. Purge hose and manifold.

6. After Is displayed, open the valve and charge the refrigerant

manifold

Capillary Assembly

Low pressure

gas pipe

Low pressure

gas pipe

CAUTION

1. Guaranteed temperature range (Error will occur if temperature is out of range)

IDU : 20°C ~ 32°C(68~90°F)

ODU : 0°C ~ 43°C (32~109°F)

2. For refrigerant charging, use designated device only. (Capillary Assem Set)

3. Set the IDU wired remote controller temperature sensing mode as IDU

4. Be careful that IDU should not be thermo off.

Error contents about auto refrigerant charging function

1. : Temperature Range Error (In case that IDU or ODU is out of range)

2. : Low Pressure Descent Error (In case the system runs at low pressure limit for over 10 minutes)

3. : Judging rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using

designated Capillary Assembly)

4. : Instability Error( In case the high/low pressure target doesn't get satisfied for some time after the

starting operation)

Test Run

ENGLISH

Installation Manual 97

This function judges refrigerant leakage and overcharging

It can be used with refrigerant auto charging function.

Inspection Start

Press black button for 2 seconds

Proper Temperature

Thermo off indoor unit

Decide Refrigerant Quantity

Indoor Unit OFF

Too much

Refrigerant

Not enough

Refrigerant

Cannot tell

Quantity

Refrigerant

Quantity

Normal

Gas/Liquid

pipe direct

connection

Based on Refrigerant Quantity

YES

Display Error

Press black button for 2 seconds

Data Reset and Wait

End

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Note

1. In case air temperature is out of guaranteed temperature, refrigerant checking function may end without performing refrigerant

checking. Use guaranteed temperature range only.

2. During the process of judging refrigerant amount, if the cycle isn't stable, refrigerant checking function may end without

performing refrigerant checking.

Refrigerant Checking Function (Setting 2)

Test Run

98 Outdoor Unit

[ Error contents about auto refrigerant charging function ]

1. : Temperature Range Error (In case that IDU or ODU is out of range)

2. : System Unstable Error (In case, After 45 min operating the system, it does not be stable)

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant check-

ing and the system will be OFF.

2. Excess of Refrigerant(619)

After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto

Charging Function.

3. Scarcity of Refrigerant(629)

Charge the refrigerant by using Refrigerant Auto Charging Function.

4. Impossible to Judge(639)

IF the system is not in order, check the other problem except refrigerant.

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)

IDU : 20°C ~ 32°C(68~90°F)

ODU : 0°C ~ 43°C (32~109°F)

2. Set IDU wired remote controller temperature sensor setting as 'IDU'.

3. Make certain that IDU doesn't run with thermo off mode during operation.

Test Run

ENGLISH

Installation Manual 99

This function is checking process for normal operation of parts and system On operating system.

•

All processes carry out included refrigerant amount judge logic and check normal condition of parts on cooling mode.

•

This function check only normal condition of parts on heating mode.

• Saved data can check using LGMV.

Note

1. Judge the normal condition refer to report of Test Running.

Thermo off

IDU judge

Start

Temp. Condition

1 IDU operation

1 IDU operation data

(10min)

Refrigerant amount judge

during all IDU operation

data on Test Runing(15min)

Error Display

Press the black button for 2 sec

Yes

Note 1

End

Press the black button for 2 sec.

after turning off all of Dip switch.

Completed

Yes

All IDU operation on

Cooling mode

Press the black button for 2 sec

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Integrated Test Running Function_Cooling Mode (Setting 3)

Test Run

100 Outdoor Unit

Integrated Test Running Function_Heating Mode (Setting 4)

Start

Yes

Note 1

Error Display

End

Completed

Press the black button for 2 sec.

after turning off all of Dip switch.

Error Display

1 IDU operation

1 IDU operation data(10min)

All IDU operation data(10min)

Temp. Condition

Press the black button for 2 sec.

This function is checking process for normal operation of parts and system On operating system.

•

All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating mode.

•

This function check only normal condition of parts on heating mode.

• Saved data can check using LGMV.

Note

1. Judge the normal condition refer to report of Test Running.

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Test Run

ENGLISH

Installation Manual 101

[ Error contents about auto refrigerant charging function ]

1. : Temperature Range Error (In case that IDU or ODU is out of range)

2. : System Unstable Error (In case, After 45 min operating the system, it does not be stable)

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant check-

ing and the system will be OFF.

2. Excess of Refrigerant(619)

After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto

Charging Function.

3. Scarcity of Refrigerant(629)

Charge the refrigerant by using Refrigerant Auto Charging Function.

4. Impossible to Judge(639)

IF the system is not in order, check the other problem except refrigerant.

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)

IDU : 20°C ~ 32°C(68~90°F)

ODU : 0°C ~ 43°C (32~109°F)

2. Set IDU wired remote controller temperature sensor setting as 'IDU'.

3. Make certain that IDU doesn't run with thermo off mode during operation.

Test Run

102 Outdoor Unit

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.

Max. RPM setting method

Example of Max. RPM Setting

Setting Method for Fan Max. RPM

RPM / Time Settings

Noise

CAUTION

1. Request installer to set the function during installation.

2. In case the function is not used, set the dip S/W OFF and reset the power.

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

Reset the power

Setting the Fan Max. RPM

Setting Complete

Set the DIP S/W

Note 1)

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Step Black Button Red Button

1 1 time 1 time

2 2 time 1 time

3 3 time 1 time

4 4 time 1 time

5 5 time 1 time

6 6 time 1 time

7 7 time 1 time

8 8 time 1 time

9 9 time 1 time

Capacity

Judgment

Time

(hr)

Operation

Time

(hr)

Capacity(Hp)

8 10~14

Step Fan Maximum RPM

①

790 900

8 9

2 6.5 10.5

3 5 12

②

680 800

8 9

5 6.5 10.5

6 5 12

③

620 780

8 9

8 6.5 10.5

9 5 12

Capacity

Capacity(HP) 8 10~14

Step Max. RPM Noise(dB)

Standard 58 62

①

55 59

②

52 56

③

49 53

Night Low Noise Function

Test Run

ENGLISH

Installation Manual 103

This function is used for creating vacuum in the system after compressor replacement, ODU parts replace-

ment or IDU addition/replacement.

Vacuum mode cancellation method

Set the DIP S/W ON

Vacuum mode setting

ODU V/V OPEN

Main EEV, SC EEV OPEN

IDU EEV OPEN

HR unit SC EEV, sol valve Open

Press the black button Main PCB (5 sec.)

Vacuum mode setting method

Set the DIP S/W OFF

Power reset

Vacuum mode cancellation

ODU power reset

CAUTION

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

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Vacuum Mode

Test Run

104 Outdoor Unit

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 dip S/W setting method

High static pressure mode : Set DIP S/W

Power Reset

Set the DIP S/W ON

Static pressure compensation mode setting

method

Static pressure compensation mode cancellation

method

DIP switch OFF

Power Reset

Static pressure compensation mode is set

Static pressure compensation mode is cancelled

DIP Switch Settings

Warning : Please reset SUB PCB before starting this function

Note

How to set the unit to high ESP :

1) Standard ESP (External Static Pressure) : 4mmH

O (39.2Pa)

2) High ESP (External Static Pressure) : 8mmH

O (78.4Pa)

➔

The setting of dip S/W is needed. (Refer to above operating method)

Test Run

ENGLISH

Installation Manual 105

Error Indicator

• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.

• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of

outdoor unit control board as shown in the table.

• If more than two troubles occur simultaneously, lower number of error code is first displayed.

• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.

Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2

011

→

051 : No.105 error of master unit

❈

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

Slave1 Outdoor Unit Inverter Compressor

IPM Fault

Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault

Slave2 Outdoor Unit Inverter Compressor

IPM Fault

Slave2 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)

Inverter Board Input Over Current(RMS) of

Slave1 Outdoor Unit

Slave1 Outdoor Unit Inverter Board Input Current excess

(RMS)

Inverter Board Input Over Current(RMS) of

Slave2 Outdoor Unit

Slave2 Outdoor Unit Inverter Board Input Current excess

(RMS)

Self-Diagnosis Function

Test Run

106 Outdoor Unit

Display Title Cause of Error

Outdoor unit related error

2 3

Master Outdoor Unit Inverter Compressor

DC link Low Voltage1

DC charging is not performed at Master Outdoor Unit

after starting relay turn on.

Slave1 Outdoor Unit Inverter Compressor

DC link Low Voltage

DC charging is not performed at Slave1 Outdoor Unit

after starting relay turn on.

Slave2 Outdoor Unit Inverter Compressor

DC link Low Voltage

DC charging is not performed at Slave2 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.

Slave1 Outdoor Unit High Pressure

Switch

System is turned off by slave1 Outdoor Unit high

pressure switch.

Slave2 Outdoor Unit High Pressure

Switch

System is turned off by slave2 Outdoor Unit high

pressure switch.

2 5

Master Outdoor Unit Input Voltage High/

Low Voltage

Master outdoor unit Input voltage is over 514V or below 300V(DT3 Model)

Master outdoor unit Input voltage is over 300V or below 173V(BT3 Model)

Slave1 Outdoor Unit Input Voltage High/

Low Voltage

slave1 outdoor unit Input voltage is over 514V or below 300V(DT3 Model)

slave1 outdoor unit Input voltage is over 300V or below 173V(BT3 Model)

Slave2 Outdoor Unit Input Voltage High/

Low Voltage

slave2 outdoor unit Input voltage is over 514V or below 300V(DT3 Model)

slave2 outdoor unit Input voltage is over 300V or below 173V(BT3 Model)

2 6

Master Outdoor Unit Inverter Compressor

Start Failure

The First Start Failure by Master Outdoor Unit Inverter

Compressor Abnormality

Slave1 Outdoor Unit Inverter Compressor

Start Failure

The First Start Failure by Slave1 Outdoor Unit Inverter

Compressor Abnormality

Slave2 Outdoor Unit Inverter Compressor

Start Failure

The First Start Failure by Slave2 Outdoor Unit Inverter

Compressor Abnormality

2 8

Master Outdoor Unit Inverter DC link High

Voltage

System is turned off by Master Outdoor Unit DC Voltage

Over Charging

Slave1 Outdoor Unit Inverter DC link High

Voltage

System is turned off by Slave1 Outdoor Unit DC Voltage

Over Charging

Slave2 Outdoor Unit Inverter DC link High

Voltage

System is turned off by Slave2 Outdoor Unit DC Voltage

Over Charging

2 9

Master Outdoor Unit Inverter Compressor

Over Current

Master Outdoor Unit Inverter Compressor Fault OR Drive

Fault

Slave1 Outdoor Unit Inverter Compressor

Over Current

Slave1 Outdoor Unit Inverter Compressor Fault OR Drive

Fault

Slave2 Outdoor Unit Inverter Compressor

Over Current

Slave2 Outdoor Unit Inverter Compressor Fault OR Drive

Fault

3 0

Master Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

System is turned off by Master Outdoor Uunit Constant

Speed Compressor2 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant

Speed Compressor2 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed

Compressor2 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant

Speed Compressor2 High Discharge Temperature

Test Run

ENGLISH

Installation Manual 107

Display Title Cause of Error

Outdoor unit related error

3 2

Master Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Master Outdoor Unit Inverter

Compressor High Discharge Temperature

Slave1 Outdoor Unit Inverter Compressor

High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Inverter

Compressor High Discharge Temperature

Slave2 Outdoor Unit Inverter Compressor

Discharge High Temperature

System is turned off by Slave2 Outdoor Unit Inverter

Compressor High Discharge Temperature

3 3

Master Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

System is turned off by Master Outdoor Uunit Constant

Speed Compressor1 High Discharge Temperature

Slave1 Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

System is turned off by Slave1 Outdoor Unit Constant

Speed Compressor1 High Discharge Temperature

Slave2 Outdoor Unit Constant Speed

Compressor1 High Discharge Temperature

System is turned off by Slave2 Outdoor Unit Constant

Speed Compressor1 High Discharge Temperature

3 4

1 High Pressure of Master Outdoor Unit

System is turned off by excessive increase of high

pressure of Master Outdoor Unit

2 High Pressure of Slave1 Outdoor Unit

System is turned off by excessive increase of high

pressure of Slave1 Outdoor Unit

3 High Pressure of Slave2 Outdoor Unit

System is turned off by excessive increase of high

pressure of Slave2 Outdoor Unit

3 5

1 Low Pressure of Master Outdoor Unit

System is turned off by excessive decrease of low

pressure of Master Outdoor Unit

2 Low Pressure of Slave1 Outdoor Unit

System is turned off by excessive decrease of low

pressure of Slave1 Outdoor Unit

3 Low Pressure of Slave2 Outdoor Unit

System is turned off by excessive decrease of low

pressure of Slave2 Outdoor Unit

3 6

Master Outdoor Unit Low Condensing

Ratio Limited

Master Outdoor Unit stayed under low condensing limit

for 3 minutes

Slave1 Outdoor Unit Low Condensing

Ratio Limited

Slave1 Outdoor Unit stayed under low condensing limit

for 3 minutes

Slave2 Outdoor Unit Low Condensing

Ratio Limited

Slave2 Outdoor Unit stayed under low condensing limit

for 3 minutes

4 0

Master Outdoor Unit Inverter Compressor

CT Sensor Fault

Master Outdoor Unit Inverter Compressor CT Sensor

open or short

Slave1 Outdoor Unit Inverter Compressor

CT Sensor Fault

Slave1 Outdoor Unit Inverter Compressor CT Sensor

open or short

Slave2 Outdoor Unit Inverter Compressor

CT Sensor Fault

Slave2 Outdoor Unit Inverter Compressor CT Sensor

open or short

4 1

Master Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Master Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Slave1 Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Slave1 Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Slave2 Outdoor Unit Inverter Compressor

Discharge Temperature Sensor Fault

Slave2 Outdoor Unit Inverter Compressor Discharge

Temperature Sensor open or short

Test Run

108 Outdoor Unit

Display Title Cause of Error

Outdoor unit related error

4 2

Master Outdoor Unit Low Pressure

Sensor Fault

Master Outdoor Unit Low Pressure Sensor open or short

Slave1 Outdoor Unit Low Pressure

Sensor Fault

Slave1 Outdoor Unit Low Pressure Sensor open or short

Slave2 Outdoor Unit Low Pressure

Sensor Fault

Slave2 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

Slave1 Outdoor Unit High Pressure

Sensor Fault

Slave1 Outdoor Unit High Pressure Sensor open or short

Slave2 Outdoor Unit High Pressure

Sensor Fault

Slave2 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

Slave1 Outdoor Unit Air Temperature

Sensor Fault

Slave1 Outdoor Unit Air Temperature Sensor open or

short

Slave2 Outdoor Unit Air Temperature

Sensor Fault

Slave2 Outdoor Unit Air Temperature Sensor open or

short

4 5

Master Outdoor Unit Heat Exchanger

Temperature Sensor (Front side) Fault

Master Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

Slave1 Outdoor Unit Heat Exchanger

Temperature Sensor (Front side) Fault

Slave1 Outdoor Unit Heat Exchanger Temperature

Sensor (Front side) open or short

Slave2 Outdoor Unit Heat Exchanger

Temperature Sensor (Front side) Fault

Slave2 Outdoor Unit Heat Exchanger Temperature

Sensor(Front side) open or short

4 6

Master Outdoor Unit Suction Temperature

Sensor Fault

Master Outdoor Unit Suction Temperature Sensor open

or short

Slave1 Outdoor Unit Suction Temperature

Sensor Fault

Slave1 Outdoor Unit Suction Temperature Sensor open

or short

Slave2 Outdoor Unit Suction Temperature

Sensor Fault

Slave2 Outdoor Unit Suction Temperature Sensor open

or short

4 7

Master Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor Fault

Master Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave1 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor Fault

Slave1 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

Slave2 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor Fault

Slave2 Outdoor Unit Constant Speed Compressor1

Discharge Temperature Sensor open or short

4 8

Master Outdoor Unit Constant Speed Compressor2

Discharge Temperature Sensor Fault

Master Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Slave1 Outdoor Unit Constant Speed Compressor2

Discharge Temperature Sensor Fault

Slave1 Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

Slave2 Outdoor Unit Constant Speed Compressor2

Discharge Temperature Sensor Fault

Slave2 Outdoor Unit Constant Speed Compressor 2

Discharge Temperature Sensor open or short

4 9

Master Outdoor Unit Faulty IPM

Temperature Sensor

Master Outdoor Unit IPM Temperature Sensor short/open

Slave1 Outdoor Unit Faulty IPM

Temperature Sensor

Slave1 Outdoor Unit IPM Temperature Sensor short/open

Slave2 Outdoor Unit Faulty IPM

Temperature Sensor

Slave2 Outdoor Unit IPM Temperature Sensor short/open

Test Run

ENGLISH

Installation Manual 109

Display Title Cause of Error

Outdoor unit related error

5 0

Omitting connection of R(L1), S(L2),

T(L3) power of Master Outdoor Unit

Omitting connection of Master outdoor unit

Omitting connection of R(L1), S(L2), T(L3)

power of Slave1 Outdoor Unit

Omitting connection of Slave1 Outdoor Unit

Omitting connection of R(L1), S(L2), T(L3)

power of Slave2 Outdoor Unit

Omitting connection of Slave2 Outdoor Unit

5 1

1 Excessive capacity of indoor units

Excessive connection of indoor units compared to

capacity of Outdoor Unit

Excessive capacity of indoor units

from zoning branches

Excessive connection of indoor units compared to

capacity of zoning branches of HR Unit

5 2

Communication error : inverter PCB

→

Main PCB

Failing to receive inverter signal at main PCB of Master

Outdoor Unit

Communication error : inverter PCB

→

Main PCB

Failing to receive inverter signal at main PCB of Slave1

Outdoor Unit

Communication error : inverter PCB

→

Main PCB

Failing to receive inverter signal at main PCB of Slave2

Outdoor Unit

5 3 1

Communication error : indoor unit

→

main

PCB of Outdoor Unit

Failing to receive indoor unit signal at main PCB of

Outdoor Unit .

5 4

Reverse connection of R(L1), S(L2), T(L3)

power of Master Outdoor Unit

Reverse connection or omitting connection of R(L1),

S(L2), T(L3) power of Master Outdoor Unit

Reverse connection of R(L1), S(L2), T(L3)

power of Slave1 Outdoor Unit

Reverse connection or omitting connection of R(L1),

S(L2), T(L3) power of Slave1 Outdoor Unit

Reverse connection of R(L1), S(L2), T(L3)

power of Slave2 Outdoor Unit

Reverse connection or omitting connection of R(L1),

S(L2), T(L3) power of Slave2 Outdoor Unit

5 7

Master Outdoor Unit Communication

Error with Inverter Controller

Master Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

Slave1 Outdoor Unit Communication

Error with Inverter Controller

Slave1 Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

Slave2 Outdoor Unit Communication

Error with Inverter Controller

Slave2 Outdoor Unit Controller part cannot receive inverter

control signals (usually happens after on-boarding)

5 9 1

Error of series installation

In the case of installing smaller outdoor unit as master

unit

6 0

Inverter PCB EEPROM Error of Master

Outdoor Unit

Access Error of Inverter PCB of Master Outdoor Unit

Inverter PCB EEPROM Error of Slave1

Unit

Access Error of Inverter PCB of Slave1 Outdoor Unit

Inverter PCB EEPROM Error of Slave2

Unit

Access Error of Inverter PCB of Slave2 Outdoor Unit

6 7

1 Master Outdoor Unit Fan Lock Restriction of Master Outdoor Unit

2 Slave1 Outdoor Unit Fan Lock Restriction of Slave1 Outdoor Unit

3 Slave2 Outdoor Unit Fan Lock Restriction of Slave2 Outdoor Unit

6 9

Constant1 CT Sensor Error of Master

Outdoor Unit

Constant1 CT Sensor open or short of Master Outdoor

Unit

Constant1 CT Sensor Error of Slave1

Outdoor Unit

Constant1 CT Sensor open or short of Slave1 Outdoor

Unit

Constant1 CT Sensor Error of Slave2

Outdoor Unit

Constant1 CT Sensor open or short of Slave2 Outdoor

Unit

Test Run

110 Outdoor Unit

Display Title Cause of Error

Outdoor unit related error

7 0

Constant2 CT Sensor Error of Master

Outdoor Unit

Constant2 CT Sensor open or short of Master Outdoor

Unit

Constant2 CT Sensor Error of Slave1

Outdoor Unit

Constant2 CT Sensor open or short of Slave1 Outdoor

Unit

Constant2 CT Sensor Error of Slave2

Outdoor Unit

Constant2 CT Sensor open or short of Slave2 Outdoor

Unit

7 3

Instant Over Current(Peak) of Master

Outdoor Unit PFC

Instant Over Current(Peak) of Master Outdoor Unit PFC

Instant Over Current(Peak) of Slave1

Outdoor Unit PFC

Instant Over Current(Peak) of Slave1 Outdoor Unit PFC

Instant Over Current(Peak) of Slave2

Outdoor Unit PFC

Instant Over Current(Peak) of Slave2 Outdoor Unit PFC

7 5

1 Master Outdoor Unit Fan CT Sensor Error Master Outdoor Unit Fan CT Sensor open or short

2 Slave1 Outdoor Unit Fan CT Sensor Error Slave1 Outdoor Unit Fan CT Sensor open or short

3 Slave2 Outdoor Unit Fan CT Sensor Error Slave2 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

Slave1 Outdoor Unit Fan DC Link High

Voltage Error

Slave1 Outdoor Unit Fan DC Link High Voltage Error

Slave2 Outdoor Unit Fan DC Link High

Voltage Error

Slave2 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

Slave1 Outdoor Unit Fan Over Current

Error

Slave1 Outdoor Unit Fan is over 5A

Slave2 Outdoor Unit Fan Over Current

Error

Slave2 Outdoor Unit Fan is over 5A

7 9

Master Outdoor Unit Fan Start Failure

Error

Master Outdoor Unit Fan First Position Sensing Failure

Slave1 Outdoor Unit Fan Start Failure

Error

Slave1 Outdoor Unit Fan First Position Sensing Failure

Slave2 Outdoor Unit Fan Start Failure

Error

Slave2 Outdoor Unit Fan First Position Sensing Failure

8 6

Master Outdoor Unit Main PCB EEPROM

Error

Communication Fail Between Master Outdoor Unit Main

MICOM and EEPROM or omitting EEPROM

Slave1 Outdoor Unit Main PCB EEPROM

Error

Communication Fail Between Slave1 Outdoor Unit Main

MICOM and EEPROM or omitting EEPROM

Slave2 Outdoor Unit Main PCB EEPROM

Error

Communication Fail Between Slave2 Outdoor Unit Main

MICOM and EEPROM or omitting EEPROM

8 7

Master Outdoor Unit Fan PCB EEPROM

Error

Communication Fail Between Master Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Slave1 Outdoor Unit Fan PCB EEPROM

Error

Communication Fail Between Slave1 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Slave2 Outdoor Unit Fan PCB EEPROM

Error

Communication Fail Between Slave2 Outdoor Unit Fan

MICOM and EEPROM or omitting EEPROM

Test Run

ENGLISH

Installation Manual 111

Display Title Cause of Error

Outdoor unit related 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

Communication Error Between Slave1

Outdoor Unit and Other Outdoor Unit

Failing to receive master and other Slave Unit signal

at main PCB of Slave1 Outdoor Unit

Communication Error Between Slave2

Outdoor Unit and Other Outdoor Unit

Failing to receive master and other Slave Unit signal

at main PCB of Slave2 Outdoor Unit

1 0 5

Master Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of master

unit.

Slave1 Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of Slave1

unit.

Slave2 Outdoor Unit Fan PCB

Communication Error

Failing to receive fan signal at main PCB of Slave2

unit.

1 0 6

Master Outdoor Unit FAN IPM Fault Error Instant Over Current at Master Outdoor Unit Fan IPM

Slave1 Outdoor Unit FAN IPM Fault Error Instant Over Current at Slave1 Outdoor Unit Fan IPM

Slave2 Outdoor Unit FAN IPM Fault Error Instant Over Current at Slave2 Outdoor Unit Fan IPM

1 0 7

Master Outdoor Unit Fan DC Link Low

Voltage Error

Master Outdoor Unit Fan DC Link Input Voltage is

under 380V

Slave1 Outdoor Unit Fan DC Link Low

Voltage Error

Slave1 Outdoor Unit Fan DC Link Input Voltage is

under 380V

Slave2 Outdoor Unit Fan DC Link Low

Voltage Error

Slave2 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 Outdoor Unit

is open or short

Slave1 Outdoor Unit Liquid pipe

Temperature Sensor Error

Liquid pipe temperature sensor of slave1 Outdoor Unit

is open or short

Slave2 Outdoor Unit Liquid pipe

Temperature Sensor Error

Liquid pipe temperature sensor of slave2 Outdoor Unit

is open or short

1 1 5

Master Outdoor Unit Subcooling Outlet

Temperature Sensor Error

Master Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Slave1 Outdoor Unit Subcooling Outlet

Temperature Sensor Error

Slave1 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

Slave2 Outdoor Unit Subcooling Outlet

Temperature Sensor Error

Slave2 Outdoor Unit Subcooling Outlet Temperature

Sensor open or short

1 5 1

Failure of operation mode conversion at

Master Outdoor Unit

Pressure unbalance between Outdoor Units

Failure of operation mode conversion at

Slave1 Outdoor Unit

Pressure unbalance between Outdoor Units

Failure of operation mode conversion at

Slave2 Outdoor Unit

Pressure unbalance between Outdoor Units

Test Run

112 Outdoor Unit

Display Title Cause of Error

Outdoor unit related error

1 5 3

Master upper part heat exchanger

temperature sensor error

Master Outdoor Unit upper part temperature sensor

open/short

Slave1 upper part heat exchanger

temperature sensor error

Slave1 Outdoor Unit upper part temperature sensor

open/short

Slave2 upper part heat exchanger

temperature sensor error

Slave2 Outdoor Unit upper part temperature sensor

open/short

1 5 4

Master lower part heat exchanger

temperature sensor error

Master Outdoor Unit lower part temperature sensor

open/short

Slave1 lower part heat exchanger

temperature sensor error

Slave1 Outdoor Unit lower part temperature sensor

open/short

Slave2 lower part heat exchanger

temperature sensor error

Slave2 Outdoor Unit lower part temperature sensor

open/short

1 7 3

Master Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric

break down at Master Outdoor Unit

Slave1 Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric

at Slave1 Outdoor Unit

Slave2 Outdoor Unit Constant Speed

Compressor Fault

Comp locking, Check Valve leakage, comp dielectric

at Slave2 Outdoor Unit

1 7 4

Master outdoor unit rated speed 2

condenser over-current

Master Outdoor Unit rated speed 2 condenser burned

/ locked or fault by over-current

Slave1 outdoor unit rated speed 2

condenser over-current

Slave1 Outdoor Unit rated speed 2 condenser burned

/ locked or fault by over-current

Slave2 outdoor unit rated speed 2

condenser over-current

Slave2 Outdoor Unit rated speed 2 condenser burned

/ locked or fault by over-current

1 8 2

Master outdoor unit Main Board Main-Sub

Micom communication error

Master Outdoor Unit Main Board Main-Sub Micom com-

munication failed

Slave1 outdoor unit Main Board Main-Sub

Micom communication error

Slave1 Outdoor Unit Main Board Main-Sub Micom com-

munication failed

Slave2 outdoor unit Main Board Main-Sub

Micom communication error

Slave2 Outdoor Unit Main Board Main-Sub Micom com-

munication failed

1 8 4

Master Inv. oil balance pipe Temperature

Sensor error

Master Outdoor Unit oil balance temperature Sensor

open or short

Slave1 Inv. oil balance pipe Temperature

Sensor error

Slave1 Outdoor Unit oil balance temperature Sensor

open or short

Slave2 Inv. oil balance pipe Temperature

Sensor error

Slave2 Outdoor Unit oil balance temperature Sensor

open or short

1 8 5

Master const.1 oil balance pipe

Temperature Sensor error

Master Outdoor Unit oil balance temperature Sensor

open or short

Slave1 const.1 oil balance pipe

Temperature Sensor error

Slave1 Outdoor Unit oil balance temperature Sensor

open or short

Slave2 const.1 oil balance pipe

Temperature Sensor error

Slave2 Outdoor Unit oil balance temperature Sensor

open or short

Test Run

ENGLISH

Installation Manual 113

Display Title Cause of Error

Outdoor unit related error

1 8 6

Master const.2 oil balance pipe

Temperature Sensor error

Master Outdoor Unit oil balance temperature Sensor open or

short

vSlave1 const.2 oil balance pipe

Temperature Sensor error

Slave1 Outdoor Unit oil balance temperature Sensor open or

short

Slave2 const.2 oil balance pipe

Temperature Sensor error

Slave2 Outdoor Unit oil balance temperature Sensor open or

short

1 9 3

Excessive increase of Master Outdoor

Unit Fan PCB Heat Sink Temperature

Master Outdoor Unit Fan Inverter PCB Temperature is Over

95°C

Excessive increase of Slave1 Outdoor

Unit Fan PCB Heat Sink Temperature

Slave1 Outdoor Unit Fan Inverter PCB Temperature is Over

95°C

Excessive increase of Slave2 Outdoor

Unit Fan PCB Heat Sink Temperature

Slave2 Outdoor Unit Fan Inverter PCB Temperature is Over

95°C

1 9 4

Master Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Master Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Slave1 Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Slave1 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

Slave2 Outdoor Unit Fan PCB Heat Sink

Temperature Sensor Error

Slave2 Outdoor Unit Fan PCB Heat Sink Temperature

Sensor open or short

HR unit related error

2 0 0 1 Searching pipe Error Failure of automatic addressing of valves

2 0 1

C +

#HR

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

2 0 2

C +

#HR

HR unit1 Sub Cooling Pipe In sensor

error

Sub Cooling Pipe In sensor of HR unit open or short

2 0 3

C +

#HR

HR unit1 Sub Cooling Pipe Out

sensor error

Sub Cooling Pipe Out sensor of HR unit. open or short

C: HR unit

#: HR unit Number

Test Run

114 Outdoor Unit

Caution For Refrigerant Leaks

Introduction

Checking procedure of limiting concentration

Caution For Refrigerant Leaks

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

The installer and system specialist shall secure safety against leakage according to local regulations or standards.

The following standards may be applicable if local regulations are not available.

Calculate minimum room capacity

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

(1) Without partition

(2) With partition and with opening which serve as

passage of air to adjoining room

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

Calculate amount of all the replenished refrigerant (lbs) per each refrigerant

system.

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 concentration shall be described

in the unit of (lbs/ft

) (Freon gas weight per unit air volume) for facilitating calculation.

Limiting concentration: 0.028(lbs/ft

)(R410A)

Outdoor unit

(No.1 system)

Flow of

refrigerant

Indoor unit

Room where refrigerant leaks

(Refrigerant of the whole

No.1 system flows out.)

Amount of additional

replenished refrigerant

Total amount of replenished

refrigerant in refrigerant

facility (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)

ENGLISH

Installation Manual 115

Caution For Refrigerant Leaks

(3) 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 counter measure

shown below:

• Counter measure 1

Provide opening for ventilation.

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

without door.

• Counter measure 2

Provide gas leak alarm linked with mechanical ventilator.

Reducing the outdoor refrigerant qty.

Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant

is heavier than air.

Outdoor unit

Indoor unit

Smallest

room

(R410A)

≤

Refrigerant concentration

(lbs/ft

)

Total amount of replenished

refrigerant in refrigerant facility (lbs)

Capacity of smallest room where

indoor unit is installed (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.

Countermeasure 2

Gas leak alarm

Mechanical ventilator

Countermeasure 1

Opening effective to ventilation

Indoor unit

116 Outdoor Unit

Installation Guide at the seaside

Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion

on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-

tion or inefficient performance.

3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it

needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1) 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.

2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.

3) Select a well-drained place.

• 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 0.7m(2.3ft) of space

between outdoor unit and the windbreak for easy

air flow.

Sea wind Sea wind

Sea wind

Windbreak

CAUTION

1. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by

using water.

USA, press #2 for PTAC, TTW

USA, press #3 for DFS, Multi V

CANADA

888-865-3026

1-888-LG-Canada

www.lge.com

LG Customer Information Center

LGEUS

LG Electronics, Air conditioning Division

1000 Sylvan Ave., Englewood Cliffs, NJ 07632

LGECI

LG ELECTRONICS CANADA INC.

20 NORELCO DRIVE.

NORTH YORK, ONTARIO M9L 2X6.

LG Electronics ARUB096BT3

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