LG ARUN50LS2B INSTALLATION 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.

P/NO : MFL67798008

www.lg.com

TYPE :

ENGLISH ITALIANO

ESPAÑOL

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

2

Outdoor Unit

ARUN/ARUV Series Outdoor Unit Installation Manual

TABLE OF CONTENTS

Safety Precautions .......................................................................................................3

Installation Process .....................................................................................................7

Outdoor Units Information ..........................................................................................8

Before installation ......................................................................................................10

Select the Best Location............................................................................................11

Installation Space.......................................................................................................12

Installation ..................................................................................................................16

Refrigerant piping ......................................................................................................20

Electrical Wiring .........................................................................................................40

Test Run ......................................................................................................................58

Caution For Refrigerant Leak....................................................................................70

Installation guide at the seaside ...............................................................................72

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.

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

WARNING

CAUTION

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.

WARNING

n 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.

ENGLISH

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.

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.

n 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.

4

Outdoor Unit

Safety Precautions

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

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

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

• If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

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.

Installation Manual 5

Safety Precautions

ENGLISH

CAUTION

n 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 lines 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.

n 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.

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.

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 20 kg.

• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.

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

• When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also support the outdoor unit at four points so that it cannot slip sideways.

Installation Manual 7

Installation Process

• 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.

• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid

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

CAUTION

ENGLISH

Determination of division work

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

Indicate clearly who is to be responsible for switch settings

Make relationship between outdoor, indoor, remote controller, and option connections clear. (Prepare control circuit diagram)

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 3.8 MPa(38.7 kgf/cm

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

Outdoor unit foundation work

Installation of outdoor unit

2

) there must be no drop in pressure.

The foundation must be level even

Avoid short circuits and ensure sufficient space is allowed for service

Fit facing panels

Automatic addressing of indoor unit

Test run adjustment

Transfer to customer with explanation

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. (In case of outdoor temperature below 10Ƅ(

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

Chassis System(HP) Model Refrigerant Product charge kg CF(Correction Factor) kg Max. Connectable No. of Indoor Units Net Weight(Gross Weight) kg Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes mm

inch

Gas Pipes mm

inch

Connection Type

Outdoor Units Information

8

Outdoor Unit

Outdoor Units Information

Power Supply : 1Ø, 220~240V, 50Hz / 1Ø, 220V, 60Hz

U4 U3 U3

4 5 6

ARUN40GS2A ARUN50GS2A ARUN60GS2A

1.8 3.0 3.0 0 0 0 6 8 9 77 106 106

950×834×330 950×1380×330 950×1380×330

37.4×32.8×13.0 37.4×54.3×13.0 37.4×54.3×13.0

9.52 9.52 9.52 3/8 3/8 3/8

15.88 15.88 19.05 5/8 5/8 3/4 FLARE BRAZING BRAZING

1Ø PFC

ARUN50GS2A ARUV60GS2A

ARUN60GS2A

ARUN40LS2A ARUV40LS2A

2 FAN PFC ARUN50LS2A ARUV50LS2A

3Ø ARUN60LS2A ARUV60LS2A

ARUN40LS2B ARUV40LS2B

ARUN50LS2B ARUV50LS2B

ARUN60LS2B ARUV60LS2B

1 FAN 1Ø PFC ARUN40GS2A ARUV50GS2A

ARUV40GS2A

U3

U4

n Heat Pump Model

Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130% Ratio of running Indoor Units to the Outdoor: Within 10 ~ 100% A combination operation over 100% cause to reduce each indoor unit capacity.

CAUTION

Heat Pump

Cooling Only

Chassis External Apperance Phase PFC

Active Filter

Outdoor

Fan

Model

Installation Manual 9

Outdoor Units Information

ENGLISH

Chassis System(HP) Model Refrigerant Product charge kg CF(Correction Factor) kg Max. Connectable No. of Indoor Units Net Weight(Gross Weight) kg Dimensions (WxHxD) mm

inch

Connecting Pipes Liquid Pipes mm

inch

Gas Pipes mm

inch

Connection Type

U4 U4 U3 4 5 6 ARUV40GS2A ARUV50GS2A ARUN60GS2A

1.95 1.95 3.0 0 0 0 6 8 9 78 78 106 950×834×330 950×834×330 950×1380×330

37.4×32.8×13.0 37.4×32.8×13.0 37.4×54.3×13.0

9.52 9.52 9.52 3/8 3/8 3/8

15.88 15.88 19.05 5/8 5/8 3/4

FLARE FLARE BRAZING

n Cooling Only Model

Connectable Indoor Unit

should be connected with "2 series" indoor unit only.

*A:PFC model, B:Active Filter model

Ex) ARNU07GSEA2

Chassis System(HP) Model

Refrigerant

Product charge kg CF(Correction Factor) kg Max. Connectable No. of Indoor Units Net Weight kg

Dimensions (WxHxD)

mm

inch

Liquid Pipes

mm

Connecting Pipes

inch

Gas Pipes

mm

inch

U3 U3 U3

4 5 6

ARUN40LS2* ARUN50LS2* ARUN60LS2*

ARUV40LS2* ARUV50LS2* ARUV60LS2*

3.0 3.0 3.0

-0.5 0 0 6 8 9 107 107 107

950 x 1,380 x 330 950 x 1,380 x 330 950 x 1,380 x 330

37.4 x 54.3 x 13.0 37.4 x 54.3 x 13.0 37.4 x 54.3 x 13.0 Ø9.52 Ø9.52 Ø9.52

3/8 3/8 3/8

Ø15.88 Ø15.88 Ø19.05

5/8 5/8 3/4

Power Supply : 3Ø, 380~415V, 50Hz/ 3Ø, 380V, 60Hz

Before Installation

10

Outdoor Unit

Before Installation

•

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.

• When carrying the suspended, unit pass the ropes between legs of base panel under the unit.

• 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.

• Use only accessories and parts which are of the designated specification when installing.

* Product appearance may be different depending on model.

Environment-friendly Alternative Refrigerant R410A

Transporting the Unit

CAUTION

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

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

• If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.

• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.

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

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

• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.

CAUTION

Be very careful while carrying the product.

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

- 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.

Air outlet grille Intake hole

Corner

Sub line

Handle

Always hold the unit by the corners, as holding it by the side intake holes on the casing may cause them to deform.

A

40° or less

WARNING

Installation Manual 11

Select the Best Location

1. 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.

2. Select installation location considering following conditions to avoid bad condition when additionally performing defrost operation.

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

at a place with a high humidity in winter (near beach, coast, lake, etc). (Ex) Rooftop where sunshine always shines.

• Performance of heating will be reduced and preheat time of the indoor unit may be lengthened in case of

installing the outdoor unit in winter at following location:

- Shade position with a narrow space

- Location with much moisture in neighboring floor.

- Location with much humidity around.

- Location where ventilation is good. It is recommended to install the outdoor unit at a place with a lot of sunshine as possible as.

- Location where water gathers since the floor is not even.

3. When installing the outdoor unit in a place that is constantly exposed to a strong wind like a coast or on a high story of a building, secure a normal fan operation by using a duct or a wind shield.

• Install the unit so that its discharge port faces to the wall of the building.

Keep a distance 500mm or more between the unit and the wall surface.

• Supposing the wind direction during the operation season of the air conditioner, install the unit so that the

discharge port is set at right angle to the wind direction.

Turn the air outlet side toward the building's wall,

fence or windbreak screen.

Set the outlet side at a right angle

to the direction of the wind.

ENGLISH

500

Air inlet grille

Strong wind

Blown air

12

Outdoor Unit

Installation Space

• The following values are the least space for installation.

If any service area is needed for service according to field circumstance, obtain enough service space.

• The unit of values is mm.

n In case of obstacles on the suction side

1. Stand alone installation

2. Collective installation

100 or

more

100 or

more

100 or

more

500 or less

1000 or more

100 or

more

200 or

more

100 or

more

1000 or

300 or

more

150 or

more

1000 or

more

100 or

more

500 or less

150 or

500 or less

more

200 or

1000 or

150 or

more

300 or

more

[Unit:mm]

more

1000 or

[Unit:mm]

Installation Manual 13

ENGLISH

Installation Space

n In case of obstacles on the discharge side

1. Stand alone installation

n In case of obstacles on the suction and the discharge side

Ú Obstacle height of discharge side is higher than the unit

1. Stand alone installation

2. Collective installation

500 or less

more

1000 or

500 or

more

100 or

more

1000 or

more

100 or

more

500 or

more

500 or less

1000 or

more

L

500 or

more

100 or

more

L > HL > H

H

500 or less

1000 or

more

250 or

more

1000 or

[Unit:mm]

more

1000 or

L

[Unit:mm]

5

14

Outdoor Unit

Installation Space

2. Collective installation

Ú Obstacle height of discharge side is lower than the unit

1. Stand alone installation

500 or less

L > H L > H

H

L

100 or more

1000 or

more

300 or

more

100 or more

H

500 or less

L ≤ H L ≤ H

H

L

100 or

more

500 or

more

1250 or more

300 or

1000 or

more

300 or

more

[Unit:mm]

more

1000 or

H

more

1000 or

L

500 or less

L ≤ H L ≤ H

H

L

100 or more

1500 or

more

300 or

more

L

100 or more

1500 or

more

300 or

more

1000 or

H

[Unit:mm]

Installation Manual 15

ENGLISH

Installation Space

Collective / Continuous Installation for roof top use

Space required for collective installation and continuous installation: When installing several units, leave space between each block as shown below considering passage for air and people.

1. One row of stand alone installation

2. Rows of collective installation (2 or more)

• L should be smaller than H

100 or

more

2000 or

more

200 or

more

1000 or

more

L

300 or

more

3000 or

more

H

600 or

more

1500 or

more

100 or

more

L ≤ H

[Unit:mm]

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well.

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

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

• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction hole, the

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

• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average snowfall) if it

is installed at the area with much snowfall.

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

Installation

Foundation for Installation

• Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installation.

• Fix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, nuts and washers each which are available on the market.)

• It is best to screw in the foundation bolts until their length are 20mm from the foundation surface.

Frame

H-Beam

100

Spring washer

Nut

75

Foundation bolt executing method

200

Anti-vibration

Concrete

base

materials

75

Four bolt are required 3 thread ridges

200

[Unit:mm]

Installation Manual 17

ENGLISH

Installation

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 outdoor unit.

• Cut the pipes a little longer than measured distance.

• Cut the cable 1.5m longer than the pipe length.

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 direction 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 right.

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

4) Check

• Compare the flared work with figure right.

• 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.

Pipe

" A "

<5.6(19,100) 12.7(1/2) 6.35(1/4)

1.6~1.8 1.1~1.3

(0.63~0.71) (0.43~0.51)

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

1.6~1.8 1.5~1.7

(0.63~0.71) (0.59~0.67)

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

1.9~2.1 1.5~1.7

(0.75~0.83) (0.59~0.67)

Indoor unit [kW(Btu/h]

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Unit : mm(inch)

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Gas Liquid Gas Liquid

18

Outdoor Unit

Installation

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.

mm N.m(kgf.cm) mm

pipe size tightenig torque A Flare shape

Ø9.52 32.7-39.9(327~399) 12.8-13.2

Ø12.7 49.5-60.3(495~603) 16.2-16.6

Ø15.88 61.8-75.4(618~754) 19.3-19.7

Tightening torque

Union

mm inch N.m(kgf•cm)

Ø6.35 1/4 18~25(180~250) Ø9.52 3/8 34~42(340~420) Ø12.7 1/2 55~66(550~660) Ø15.88 5/8 63~82(630~820) Ø19.05 3/4 99~121(990~1210)

Outside diameter Torque

Flare shape and flare nut tightening torque

Opening shutoff valve

Closing shutoff valve

• Always use a charge hose for service port connection.

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

• When loosening a flare nut, always use two wrenches in combination, When connecting the piping, always use a spanner and torque wrench in combination to tighten the flare nut.

• When connecting a flare nut, coat the flare(inner and outer faces) with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as the initial tightening.

CAUTION

± 2

90°

45°

± 2

A

R=0.4~0.8

Installation Manual 19

Installation

ENGLISH

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

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

• Heat insulation material to be prepared... Adiabatic

glass wool with thickness 10 to 20mm.

• Stick glass wool on all air conditioners that are

located in ceiling atmosphere.

• In addition to the normal heat insulation (thickness:

more than 8mm) for refrigerant piping (gas piping: thick piping) and drain piping, add further 10mm to 30mm thickness material.

Heat insulation

Indoor

unit

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

20

Outdoor Unit

Refrigerant Piping

n Connecting the pipes to the outdoor unit

n Possible direction for field piping

• The installation piping is connectable in four

directions.(refer to figure 1)

• When connecting in a downward direction, knock out

the knockout hole of the base pan. (refer to figure2, figure3)

n Preventing foreign objects from

entering (Figure 4)

• Plug the pipe through-holes with putty or insulation material(procured locally)to stop up all gaps,as shown in the figure 3.

• Insects or small animals entering the outdoor unit may cause a short circuit in the electrical box.

• Braze suitable field piping with service valve of gas pipe.

Wet towel

Base pan

Forward

Sideways

Knock-out

Downward

Back-

ward

Gas side piping (Bigger Dia.)

Liquid side piping (Smaller Dia.)

Connecting wire

Putty or insulating material (produced locally)

Drain hose

Connection pipe

U3 Chassis (2 Fan Model)

g

Take care so that there is no thermal damage on the service valves of the outdoor unit. (Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it as shown figure above.

CAUTION

• You should not dame pipe/base during the work of pipe knock out.

• Operate piping work removing burr after pipe knock out.

CAUTION

Pipe knock out during the

round piping.

Installation Manual 21

ENGLISH

Refrigerant Piping

• After connecting the refrigerant pipe and checking the refrigerant leakage, cover it with heat insulator and roll around it with vinyl tape. Tighten up the flare nut fitting on regulated torque. (Until “clatter” sounds is made at torque wrench part.)

• Do not bend the pipe more than twice and work on it making it a big half circle. If it is folded over, cooling/heating capacity may decrease and it could be the reason of malfunction. Do not remove the cap on flare side until the connection. Dust and sand inside pipes can be the reason of malfunction.

• Bend it following the wall and connect to outdoor unit valve.

The centers correspond with each other

Refrigerant pipe Flare nut

Flare nut

Socket flare

Screw wrench

Torque wrench

Cap

Pipe

Refrigerant pipe connection torque

U4 Chassis (1Fan Model)

6.35mm (1/4")

9.52mm (3/8")

12.7mm (1/2")

15.88mm (5/8")

• Make sure that pipe doesn't contact with the compressor terminal cover and comp bolt.

• Always insulate the liquid and gas-side field piping and branch.

CAUTION

Pipe external

diameter

Torque

180~250kgf.cm 340~420kgf.cm 550~660kgf.cm 630~820kgf.cm

22

Outdoor Unit

Refrigerant Piping

Cautions for Handling Service Valve

How to Use the Shut-Off Valve

• The service valves are closed at shipment from the factory

The names of parts of the service valve are shown in the figure.

Use hexagonal wrenches 4mm or 6mm

• Opening the valve

1. Place the hexagon wrench on the valve bar and turn counter-clockwise.

2. Stop when the valve bar no longer turns. It is now open.

• Closing the valve

1. Place the hexagon wrench on the valve bar and turn clockwise.

2. Stop when the valve bar no longer turns. It is now closed.

1

2

3

4

• Since the side boards may be deformed if only a torque wrench is used when loosening or tightening flare nuts, always lock the shut-off valve with a wrench and then use a torque wrench. Do not place wrenches on the valve cover.

Do not apply force on the valve cover, this may result in a refrigerant leak.

1

2

Make sure to keep the valve open during operation

CAUTION

1. Spanner

2. Torque wrench

1. Service point

2. Shut-off Valve

3. Filed piping connection

4. Valve cover

Direction to open Direction to open

Installation Manual 23

ENGLISH

Refrigerant Piping

To Outdoor Unit Sealed Piping

A

B

A B

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. 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 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 blow nitrogen into pipe which is brazed. 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.

Caution

ARBLN01621 ARBLN03321 ARBL054 ARBL057 ARBL1010

ARBLN07121 ARBLN14521 ARBL104 ARBL107 ARBL2010

Y branch

Header

4 branch 7 branch 10 branch

0.99

22.2

1.1

31.8

1.21

34.9

1.35

38.1

1.43

41.3

0.99

28.58

0.99

25.4

0.99

19.05

0.99

15.88

0.8

12.7

0.8

9.52

0.8

6.35

Minimum

thickness [mm]

Outer diameter

[mm]