LG ARUN144BT3 INSTALLATION MANUAL

INSTALLATION MANUAL

AIR CONDITIONER

ENGLISH FRANÇAIS ESPAÑOL

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.

ARUN Series

www.lg.com

P/NO : MFL67221404

IMPORTANT!

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.

•

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. The choice of materials and installations must comply with the applicable local/national or international standards.

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.

Special warnings

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others. Installation of all field wiring and components MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian Electrical code and National Building Code of Canada.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

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.

2 Outdoor Unit

ARUN Series Outdoor unit Installation Manual

TABLE OF CONTENTS

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

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

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

Alternative Refrigerant R410A ............................................................14

Select the Best Location......................................................................14

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

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

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

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

Pipe connections between indoor and outdoor unit.........................27

Electrical Wiring ...................................................................................53

ENGLISH

Test Run.................................................................................................80

New Function .....................................................................................100

Caution For Refrigerant Leak ............................................................108

Installation guide at the seaside .......................................................110

Installation Manual 3

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

This symbol indicates the possibility of death or serious injury.

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

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

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 topple and result in injury.

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

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

• When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit.

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

malfunction and the unit may be damaged.

4 Outdoor Unit

Safety Precautions

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

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

forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

• Ventilate before operating air conditioner when gas leaked out.

- It may cause explosion, fire, and burn.

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

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

fire or electric shock may result.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

- Consult the dealer regarding the appropriate measures to prevent the safety limit from being

exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.

• 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.

Operation

• Do not damage or use an unspecified power cord.

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

• Use a dedicated outlet for this appliance.

- There is risk of fire or electrical shock.

• Be cautious that water could not enter the product.

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

• Do not touch the power switch with wet hands.

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

• When the product is soaked (flooded or submerged), contact an Authorized Service Center.

- There is risk of fire or electric shock.

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

- It may cause injury.

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

- This could result in personal injury and product damage.

• Do not open the inlet grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

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

ENGLISH

Installation Manual 5

Safety Precautions

Installation

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

- Low refrigerant levels may cause failure of product.

• Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

• Keep level even when installing the product.

• To avoid vibration or water leakage.

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

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

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

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

• Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

- There is risk of damage or loss of property.

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

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

degradation of capacity.

• When installting the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

- The inverter equipment, private power generator, high-frequency medical equipment, or radio

communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.

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

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

fins, could cause product malfunction or inefficient operation.

Operation

• Do not use the air conditioner in special environments.

- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner

or damage its parts.

• Do not block the inlet or outlet.

- It may cause failure of appliance or accident.

• Make the connections securely so that the outside force of the cable may not be applied to the terminals.

- Inadequate connection and fastening may generate heat and cause a fire.

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

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

failure, or personal injury.

6 Outdoor Unit

Safety Precautions

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

- A bad connection may cause water leakage.

• Be very careful about product transportation.

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

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

transportation. It is dangerous.

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

- When transporting the outdoor unit, suspending it at the specified positions on the unit base.

Also support the outdoor unit at four points so that it cannot slip sideways.

• Safely dispose of the packing materials.

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

injuries.

- Tear apart and throw away plastic packaging bags so that children may not play with them. If

children play with a plastic bag which was not torn apart, they face the risk of suffocation.

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

- Starting operation immediately after turning on the main power switch can result in severe

damage to internal parts. Keep the power switch turned on during the operational season.

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

- It can cause a burn or frostbite.

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

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

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

- Wait at least 5 minutes before turning off the main power switch. Otherwise it may result in

water leakage or other problems.

• Auto-addressing should be done in condition of connecting the power of all indoor and outdoour units. Auto-addressing should also be done in case of changing the indoor unit PCB.

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

- Be careful and avoid personal injury.

• Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

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

ENGLISH

Installation Manual 7

Installation Process

Determination of division work

Indicate clearly who will be responsible for switch setting.

Preparation of contract drawings

Sleeve and insert work

Installation of indoor unit

Refrigerant piping work

Drain pipe work

Duct work

Heat insulation work

Electrical work

(connection circuits and drive circuits)

Airtight test

Vacuum drying

Additional charge of refrigerant

Fit facing panels

Automatic addressing of indoor unit

Make connection clearly between outdoor, indoor, remote controller and option.

Take account of gradient of drain piping

Check model name to make sure the fitting is made correctly

Special attention to dryness, cleanness and tightness

Adjust to downward gradient

Make sure airflow is sufficient

Make sure no gaps are left where the insulating materials are joined

Multiple core cable must not be used. (suitable cable should be selected)

In the final check for 24hours at 3.8MPa(551psi) there must be no drop in pressure.

The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour

Recharge correctly as calculated in this manual. and record the amount of added refrigerant

Make sure there are no gaps left between the facing materials used on the ceiling

Refer to automatic addressing flowchart Preheat the crank case with the electrical heater for more than 6 hours.

Outdoor unit foundation work

Installation of outdoor unit

The foundation must be level even

Avoid short circuits and ensure sufficient space is allowed for service

Test run adjustment

Transfer to customer with explanation

Run each indoor unit in turn to make sure the pipe work has been fitted correctly

Explain the use of the system as clearly as possible to your customer and make sure all relevant documentation is in order

• 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 pressure

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.)

8 Outdoor Unit

Outdoor units Information

n Combination Ration(50~130%)

Outdoor Number Connection Capacity

Single outdoor unit 130%

Double outdoor units 130% Triple outdoor units 130%

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

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

n Heat pump

Unit 1 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD) Connecting Pipes

HP 81012

To n 6810

kg 5.5 9.4 9.4

lbs 12.1 20.7 20.7

kg 190 x 1 280 × 1 280 × 1

lbs 418 x 1 617 × 1 617 × 1 mm (920×1,680×760)×1 (1,240×1,680×760)×1 (1,240×1,680×760)×1 inch (36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1 (48.8×66.1×29.9)×1

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

ARUN072BT3 ARUN096BT3 ARUN121BT3 ARUN072BT3 ARUN096BT3 ARUN121BT3

13 16 20

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)

ENGLISH

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

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

14 18 20

12 14 16 ARUN144BT3 ARUN168BT3 ARUN192BT3 ARUN144BT3 ARUN072BT3 ARUN072BT3

ARUN096BT3 ARUN121BT3

9.4 14.9 14.9

20.7 32.8 32.8 23 26 29

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 (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)

Installation Manual 9

Outdoor units Information

Unit 2 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

(190 × 1) + (280 × 1) 280 × 2 280 × 2 (418 × 1) + (617 × 1) 617 × 2 617 × 2

(1,240×1,680×760)×1

22 24 26 18 20 22

ARUN216BT3 ARUN240BT3 ARUN264BT3 ARUN072BT3 ARUN096BT3 ARUN121BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3

14.9 19 19

32.8 41 41 32 35 39

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

(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)

Unit 2 Outdoor Unit 3 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

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

(190 × 1) + (280 × 2) 280 × 3 280 × 3 (418 × 1) + (617 × 2) 617 × 3 617 × 3

(1,240×1,680×760)×2

28 32 34 24 26 28

ARUN288BT3 ARUN312BT3 ARUN336BT3 ARUN144BT3 ARUN072BT3 ARUN072BT3 ARUN144BT3 ARUN096BT3 ARUN121BT3

ARUN144BT3 ARUN144BT3

19 24.3 24.3 41 53.5 53.5 42 45 49

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 (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)

36 38 40 30 32 34

ARUN360BT3 ARUN384BT3 ARUN408BT3 ARUN072BT3 ARUN096BT3 ARUN121BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3

24.3 28.2 28.2

53.5 62.1 62.1 52 55 58

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

(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)

10 Outdoor Unit

Unit 3 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

36 ARUN432BT3 ARUN144BT3 ARUN144BT3 ARUN144BT3

28.2

62.1 61

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)

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

Outdoor Units Information

ENGLISH

Unit 1 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD) Connecting Pipes

Unit 1 Outdoor Unit 2 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

To n

lbs

lbs mm inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

HP 14 18 20

To n 12 14 16

kg 9.4 14.9 14.9

lbs 20.7 32.8 32.8

kg 270 × 1 (190 × 1) + (270 × 1) (190 × 1) + (270 × 1)

lbs 595 × 1 (418 × 1) + (595 × 1) (418 × 1) + (595 × 1)

mm (1,240×1,680×760)×1

inch (48.8×66.1×29.9)×1

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

81012

6810 ARUN072DT3 ARUN096DT3 ARUN120DT3 ARUN072DT3 ARUN096DT3 ARUN120DT3

5.5 9.4 9.4

12.1 20.7 20.7 13 16 20

190 x 1 270 × 1 270 × 1

418 x 1 595 × 1 595 × 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)

ARUN144DT3 ARUN168DT3 ARUN192DT3 ARUN144DT3 ARUN072DT3 ARUN072DT3

23 26 29

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)

ARUN096DT3 ARUN120DT3

(920×1,680×760)×1

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1

(920×1,680×760)×1

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×1

Installation Manual 11

Outdoor Units Information

Unit 2 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

HP 22 24 26

To n 18 20 22

kg 14.9 19 19

lbs 32.8 41 41

kg (190 × 1) + (270 × 1) 270 × 2 270 × 2

lbs (418 × 1) + (595 × 1) 595 × 2 595 × 2

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

ARUN216DT3 ARUN240DT3 ARUN264DT3 ARUN072DT3 ARUN096DT3 ARUN120DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3

32 35 39

(920×1,680×760)×1

(1,240×1,680×760)×1

(36.2×66.1×29.9)×1 (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)

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

(48.8×66.1×29.9)×2 (48.8×66.1×29.9)×2

Unit 2 Outdoor Unit 3 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

Unit 3 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD)

Connecting Pipes

HP 28 32 34

To n 24 26 28

kg 19 24.3 24.3

lbs 41 53.5 53.5

kg 270 × 2 (190 × 1) + (270 × 2) (190 × 1) + (270 × 2)

lbs 595 × 2 (418 × 1) + (595 × 2) (418 × 1) + (595 × 2)

mm (1,240×1,680×760)×2

inch (48.8×66.1×29.9)×2

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

HP 36 38 40

To n 30 32 34

kg 24.3 28.2 28.2

lbs 53.5 62.1 62.1

kg (190 × 1) + (270 × 2) 270 × 3 270 × 3

lbs (418 × 1) + (595 × 2) 595 × 3 595 × 3

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

ARUN288DT3 ARUN312DT3 ARUN336DT3 ARUN144DT3 ARUN072DT3 ARUN072DT3 ARUN144DT3 ARUN096DT3 ARUN120DT3

42 45 49

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)

ARUN360DT3 ARUN384DT3 ARUN408DT3 ARUN072DT3 ARUN096DT3 ARUN120DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3

52 55 58

(920×1,680×760)×1

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (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)

ARUN144DT3 ARUN144DT3

(920×1,680×760)×1

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×2

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

(48.8×66.1×29.9)×3 (48.8×66.1×29.9)×3

(920×1,680×760)×1

(1,240×1,680×760)×2

(36.2×66.1×29.9)×1 (48.8×66.1×29.9)×2

12 Outdoor Unit

Unit 3 Outdoor Unit

System

Model

Product Charge

Max. Connectable No. of Indoor Units

Net Weight

Dimensions (WxHxD) Connecting Pipes

HP To n

lbs

inch

Liquid Pipes[mm(inch)]

Gas Pipes[mm(inch)]

36 ARUN432DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3

28.2

62.1 61

270 × 3 595 × 3

(1,240×1,680×760)×3

(48.8×66.1×29.9)×3

19.05(3/4)

41.3(1 5/8)

Outdoor Units Information

ENGLISH

Installation Manual 13

Alternative Refrigerant R410A

• The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.

CAUTION:

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa(551.1psi).

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state. If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.

• 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.

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 prod-

uct at a place With a high humidity in winter (near beach, coast, lake, etc. ) (Ex : Rooftop where there is always sunshine.)

14 Outdoor Unit

Installation Space

A E



QYMQQOQV@

UYMQOQV@

Installation Space

ENGLISH

Individual Installation

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

as shown in the figures below.

Category

4 sides are

walls

Only 2 sides

are walls

Limitations on

the height of

the wall

(Refer to 4 side

walls)

Installation Space

Front

No limit to the height of the wall

No limit to the

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

height of the wall

Case 1

(10mm≤Space A, C≤49mm)

A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”) B≥100(3-15/16”) C≥10(13/32”) C≥50(1-31/32”) D≥500(19-11/16”) D≥500(19-11/16”)

A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”) B≥100(3-15/16”) C≥10(13/32”) C≥50(1-31/32”) D≥500(19-11/16”) D≥500(19-11/16”) E≥20(25/32”) E≥100(3-15/16”)

A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”) B≥100(3-15/16”) C≥10(13/32”) C≥50(1-31/32”) D≥500(19-11/16”) D≥500(19-11/16”) E≥20(25/32”) E≥100(3-15/16”) F≥600(23-5/8”) F≥500(19-11/16”)

A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”) B≥100(3-15/16”) C≥10(13/32”) C≥50(1-31/32”) D≥300(11-13/16”) D≥100(3-15/16”) E≥20(25/32”) E≥100(3-15/16”) F

≥500(19-11/16”) F≥500(19-11/16”)

A≥10(13/32”) B≥300(11-13/16”)

A≥200(7-7/8”) B≥300(11-13/16”) E≥400(15-3/4”)

Case 2

(Space A, C≥49mm)

Installation Manual 15

Installation Space

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(19-11/16inch) 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.

16 Outdoor Unit

Lifting Method

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.

Locking points for

transportation ropes

Weight per Capacity

Capacity

Chassis

[HP(Ton)]

UX2 8 (6) 190 (418) 190 (418)

UX3

Weight [kg(lbs)]

3Ø 208/230V

3Ø 460V

10 (8) 280 (617) 270 (595) 12 (10) 280 (617) 270 (595) 14 (12) 280 (617) 270 (595)

Forklift Carrying Hole

ENGLISH

Forklift Carrying Guide

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 3m(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.

Installation Manual 17

Installation

• 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 (M10) must be inserted at least 75mm(2-15/16 inch).

At least 200mm

The outdoor unit should not be supported only by the corner supports.

The location of the Anchor bolts

65(2-9/16)

At least 100mm

At least

65(2-9/16)

At least

65(2-9/16)

At least 100mm

Set up supports under center of the unit.

Center of the Unit

At least 200mm

t 100mm

At leas

Set up supports under center of the unit.

Center of the Unit

Unit : mm(inch)

730(28-3/4)

760(29-29/32)

Chassis

Outdoor unit capacity

UX2 8HP 920(36-7/32) 792(31-3/16) UX3 10~14HP 1240(48-13/16) 1102(43-3/8)

18 Outdoor Unit

H/R

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

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)

Pallet(Wood Support)

- Remove before Installation

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).

Ⓐ 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

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.

ENGLISH

• 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.

WARNING

Installation Manual 19

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Installation

Preparation of Piping

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

1) Cut the pipes and the cable.

n Use the accessory piping kit or the pipes purchased lo-

cally.

n Measure the distance between the indoor and the out-

door unit.

n Cut the pipes a little longer than measured distance.

2) Burrs removal

n Completely remove all burrs from the cut cross section

of pipe/tube.

n 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

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

Pipe diameter

Inch (mm)

Ø1/4 (Ø6.35)

Ø3/8 (Ø9.52)

Ø1/2 (Ø12.7)

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

Ø5/8 (Ø15.88)

n For below models, carry out flaring work using flaring

tool as shown below.

Applicable Indoor unit models: ARNU093TN★2, ARNU123TN★2, ARNU153TN★2, ARNU183TM★2, ARNU243TM★2, ARNU153BG★2, ARNU183BG★2, ARNU243BG★2

Pipe [inch] “A” [inch(mm)]

Gas Liquid Gas Liquid

5/8 3/8

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

A inch (mm)

Wing nut type Clutch type

0.03~0.04 0.02~0.03 (0.8~1.0) (0.5~0.8)

4) Check

n Compare the flared work with figure below. n If flare is noted to be defective, cut off the flared section

and do flaring work again.

20 Outdoor Unit

Installation

Union

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

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.

Pipe size [inch(mm)]

Ø3/8(9.52) 289.4(3270)-353.1(3990) 0.5(12.8)-0.52(13.2)

Ø1/2(12.7) 438.1(4950)-533.7(6030) 0.64(16.2)-0.65(16.6)

Tightening torque [lbf-in(Ncm)]

A [inch(mm)] flare shape

±2

90°

45°

R=0.4(1/64)~0.8(1/32)

±2

Ø5/8(15.88) 547.0(6180)-667.3(7540) 0.76(19.3)-0.78(19.7)

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

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.

ENGLISH

Closing shutoff valve

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

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

3. Make sure to tighten the cap securely. * For the tightening torque, refer to the table on the below.

Tightening torque

Shutoff valve

size

Ø6.35(1/4) Ø9.52(3/8) 33(24.3) ~ 39(28.8)

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

5.4(4.0) ~ 6.6(4.9)

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) Ø19.05(3/4)

Ø22.2(7/8)

Ø28(1

/8)

27(19.9) ~ 33(24.3)

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

13.5(10.0) ~

Hexagonal

wrench

4mm

(5/8inch)

Hexagonal

wrench

8mm(5/16inch)

16.5(12.2)

23(17.0) ~ 27(19.9)

11.5(8.5)

~ 13.9(10.3)

36(26.6) ~ 44(32.5) -

14(10.3) ~ 17(12.5)

62(45.7) ~ 75(55.3)

93(68.6) ~119(87.8)

Installation Manual 21

Installation

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 248℉(120℃)).

2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 73℉(23℃)), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

Indoor unit

• EPDM (Ethylene Propylene Diene Methylene), NBR

(Nitrile Butadiene Rubber) – over 248℉(120℃) the heat-resistance temperature.

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

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

22 Outdoor Unit

Refrigerant piping installation

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the branching parts.

Gas pipe

• 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.)

Liquid pipe

Common pipe

ENGLISH

High Low Pressure Common Pipe Connections

1. For High Low Pressure Common Pipe, use provided elbows to

connect between the outdoor units using pipes.

2. During the cutting of the pipes, remove burr, foreign substances

before connecting. Otherwise, the unit may not operate because of the sludge inside the pipe.

3. Apply Nitrogen Gas of pressure until 551.1psi(38.7kgf/cm²) for

work area leakage test.

4. After the degree of a vacuum reaches 0.097psi(5torr), continue the

vacuuming work for more than 1 hour.

5. Open the side pole with hexagonal wrench.

h When connecting to high low pressure com-

mon pipe, connect pipes using connecting elbows.

Detach knock outs according the usages.

Installing on the front side Installing on the side(Limited to high

Installing 2 units

Installing 3 units

Detach knock outs according the usages.

low pressure common pipe)

Installation Manual 23

Refrigerant piping installation

2 Unit

3 Unit

ARCNN21

ARCNN31

130(5-1/8)

416(16-3/8)

331(13-1/32) 314(12-3/8)

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)

O.D.19.05(3/4)

O.D.15.88(5/8)

O.D.19.05(3/4)

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

125(4-29/32)

406(15-31/32)

353(13-29/32)

111(4-3/8)

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

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

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

I.D.19.05(3/4)

I.D.15.88(5/8)

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

I.D.22.2(7/8)

110(4-11/32)

120(4-23/32)

I.D.22.2(7/8)

I.D.12.7(1/2)

I.D.9.52(3/8)

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

70(2-3/4)

83(3-9/32)

334(13-5/32)

281(11-1/16)

83(3-9/32)

Outdoor units Model Gas pipe Liquid pipe

I.D.

9.52(3/8)

O.D. 19.05(3/4)

I.D. 15.88(5/8)

O.D. 12.7(1/2)

I.D. 12.7(1/2)

I.D. 6.35(1/4)

110(4-11/32)

I.D.9.52(3/8)

I.D.22.2(7/8)

I.D.19.05(3/4)

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

I.D.22.2(7/8)

I.D.19.05(3/4)

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

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

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

I.D.3/4(19.05)

O.D.3/4(19.05)

I.D.3/4(19.05)

O.D.3/4(19.05)

Y branch

To outdoor unit To branch piping or indoor unit

A B

Facing

upwards

Facing

downwards

Within ± 3° Within ± 3°

Viewed from point A in direction of arrow

Within +/- 10°

Connection of Outdoor units

2 outdoor units

For more information, refer accessory installation manual.

Common pipes

[Unit: inch(mm)]

Field Supply (Not provided by LG)

24 Outdoor Unit

Refrigerant piping installation

To Outdoor Unit

Sealed Piping

A B

Caution

1. Use the following materials for refrigerant piping.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness :

Outer diameter

[mm(inch

)]

Minimum thickness

[mm(inch

)]

(0.0315)

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 .)

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

3.8Mpa(551.1psi). We recommend the following table as the minimum wall thickness.

6.35

9.52

12.7

15.88

19.05

22.2

25.4

28.58

(1/4)

(3/8)

(1/2)

0.8

(0.0315)

0.8

(0.0315)

Y branch

ARBLN01621, ARBLN03321, ARBLN07121, ARBLN14521

(5/8)

0.99

(0.039)

(3/4)

0.99

(0.039)

(7/8)

0.99

(0.039)

(1)

0.99

(0.039)

4 branch 7 branch 10 branch

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

(1-1/8)

0.99

(0.039)

31.8

(1-1/4)

1.1

(0.043)

Header

34.9

(1-3/8)

1.21

(0.048)

38.1

(1-1/2)

1.35

(0.053)

41.3

(1-5/8)

1.43

(0.056)

ENGLISH

9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.

10. Never perform a pump down. This will not only damage the compressor but also deteriorate the perform-

ance.

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

Installation Manual 25

Refrigerant piping installation

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

formance, drip of condensate and other such problems.

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

closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.

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

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

WARNING

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

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the installation pipe drawing.

26 Outdoor Unit

Refrigerant Pipe

Regulator

Nitrogen

Nitrogen Direction

Taping

Valve

Brackets for Transportation

Washer

Nut

Pipe connections between indoor and outdoor unit

ENGLISH

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

• Be sure to let 2.8psi(0.2kgf/cm²) 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.

Right Side Pipe Draw Out

Left Side Pipe Draw Out

Front Side Pipe Draw Out

Preparation Work

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

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.

Removal Area for common pipe bottom side connections.

Removal Area for Liquid/Gas pipe bottom side connections.

CAUTION

• Remove the brackets on the inverter condenser legs that were fixed to protect the unit during the transportation. (If bracket is not removed, abnormal noise or vibration may occur.)

1. Open the front panel.

2. Remove Brackets

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

Installation Manual 27

Pipe Cap Flare Nut

Pipe connections between indoor and outdoor unit

n Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work.

• Proceed the leakage prevention cap removal as follows:

1. Verify whether the liquid/gas/common pipes are locked.

2. Extract remaining refrigerant or air inside using the

service port.

3. Remove the leakage prevention cap

Common pipe

Liquid pipe

Gas pipe

Service Port

n Method of pipe cap work during the instal-

lation of single outdoor unit

1. Remove rubber cap inserted in the common pipe.

2. Wrap the common pipe service valve with wet towel.

3. Insert the pipe cap provided into the common pipe.

4. Place high/low pressure flare nut cap under the pipe cap so

that the pipe cap does not move.

5. Weld the pipe cap.

h If not wrapped with a wet towel, there may be damages in-

side the valve.

h If the unit is operated without pipe cap work, there may be

abnormality in the cycle caused by refrigerant leakage.

Leakage Prevention Cap

Pipe Drawing Out during Single / Series connection

n 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.

28 Outdoor Unit

Pipe Knock Out for

Liquid/Gas pipes

Pipe Knock Out for

common pipes

Common pipe Liquid pipe Gas pipe

Remove only liquid/gas pipe Knock Out View without base pan

Common pipe

View without base pan

Liquid pipe Gas pipe

Pipe connections between indoor and outdoor unit

n Method of drawing out pipes on the bottom side

①

Drawing out common pipe through side panel

②

Drawing out common pipe through bottom pipe

ENGLISH

n Figure of Sides when drawing out through bottom pipe

i) Single outdoor unit

ii) Series outdoor units

(Draw out common pipes through bottom)

Remove Pipe Knock Out Hole

iii) Series outdoor units

(Draw out common pipes through side panel)

Installation Manual 29

Pipe connections between indoor and outdoor unit

Refrigerant piping system

u Y branch method

1 Outdoor Units

Example : 5 Indoor Units connected

H 361ft(110m)

L492ft(150m) (656ft(200m) : Conditional application)

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

49ft(15m)

2 Outdoor Units

Example : 5 Indoor Units connected

between Outdoor units: ARCNN21

33ft

(10m)

less

H 361ft(110m)

Slave

Master

L492ft(150m) (656ft(200m) : Conditional application)

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

49ft(15m)

Master

Slave

Master

ODU Capacity Master ≥ Slave

Piping length from outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length:max 43ft(13m) (for 12ton(14HP) or more)

Additional Application

To satisfy below condition to make 131ft(40m) ~ 295ft(90m) of pipe length after first branch.

1) Diameter of pipes between first branch and the last branch should be increased by one step, except pipe diameter B,C,D is same as Diameter A Ø1/4(6.35mm)→Ø3/8(9.52mm)→Ø1/2(12.7mm)→Ø5/8(15.88mm)→Ø3/4(19.05mm)→Ø7/8(22.2mm)→Ø1(25.4)*, Ø1-1/8(28.58mm)→Ø1-1/4(31.8mm)*,Ø1-3/8(34.9mm)→Ø1-1/2(38.1mm)* * : It is not necessary to size up. h If the step up size is not available, you can not select the next higher size available.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice. A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 3281ft(1000m)

3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 131ft(40m)

4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]

- [Length of pipe from outdoor unit to the closest indoor unit 1 (A+a)] ≤ 131ft(40m)

30 Outdoor Unit

+ 80 hidden pages