LG ARUN40GS2A User manual

Brand: LG

Model: ARUN40GS2A

Category: Split-system air conditioners

Type: User manual

P/NO : MFL67891402

www.lg.com

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.

[Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si,

Gyeongsangnam-do, KOREA

Original instruction

QUICK MANUAL

AIR

CONDITIONER

ENGLISH

ITALIANO

ESPAÑOL

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

ENGLISH

TIPS FOR SAVING ENERGY

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

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

more efficiently by referring to the instructions below:

IMPORTANT SAFETY INSTRUC-

TIONS

READ ALL INSTRUCTIONS BEFORE USING THE AP-

PLIANCE.

Always comply with the following precautions

to avoid dangerous situations and ensure peak

performance of your product

WARNING

It can result in serious injury or death when the

directions are ignored

CAUTION

It can result in minor injury or product damage

when the directions are ignored

WARNING

• Installation or repairs made by unqualified

persons can result in hazards to you and oth-

ers.

• The information contained in the manual is

intended for use by a qualified service tech-

nician familiar with safety procedures and

equipped with the proper tools and test in-

struments.

• Failure to carefully read and follow all in-

structions in this manual can result in equip-

ment malfunction, property damage,

personal injury and/or death.

Installation

• Have all electric work done by a licensed

electrician according to "Electric Facility En-

gineering Standard" and "Interior Wire Regu-

lations" 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, al-

ways contact a dealer or an Authorized Serv-

ice Center.

- There is risk of fire, electric shock, explo-

sion, or injury.

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

by yourself (customer).

- There is risk of fire, electric shock, explo-

sion, or injury.

• Do not store or use flammable gas or com-

bustibles 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 andin-

stall the unit at the specified place.

- Otherwise it may cause fire, electric shock

and trouble.

• Do not install the product on a defective in-

stallation stand.

- It may cause injury, accident, or damage to

the product.

• When installing and moving the air condi-

tioner 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

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

health and may consume more electricity.

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

air conditioner.

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

air conditioner.

• Adjust the direction of the air flow vertically or horizontally to cir-

culate indoor air.

• Open windows regularly for ventilation as the indoor air quality

may deteriorate if the air conditioner is used for many hours.

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

lected in the air filter may block the air flow or weaken the cool-

ing / dehumidifying functions.

For your records

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

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

the serial number here:

Model number :

Serial number :

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

Dealer’s name :

Date of purchase :

ENGLISH

the original refrigerant, the refrigerant cycle

may malfunction and the unit may be dam-

aged.

• Do not reconstruct to change the settings of

the protection devices.

- If the pressure switch, thermal switch, or

other protection device is shorted and op-

erated 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 se-

curely, dust or water may enter the out-

door 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 exceed-

ing the safety limit when the refrigerant

leaks.

- Consult the dealer regarding the appropri-

ate measures to prevent the safety limit

from being exceeded. Should the refriger-

ant leak and cause the safety limit to be ex-

ceeded, 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 ex-

plosion.

Operation

• Do not damage or use an unspecified power

cord.

- There is risk of fire, electric shock, explo-

sion, 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 prod-

uct damage.

• Do not touch the power switch with wet

hands.

- There is risk of fire, electric shock, explo-

sion, or injury.

• When the product is soaked (flooded or sub-

merged), contact an Authorized Service Cen-

ter.

- 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.

CAUTION

Installation

• Always check for gas (refrigerant) leakage

after installation or repair of product.

- Low refrigerant levels may cause failure of

product.

• Do not install the product where the noise

or hot air from the outdoor unit could dam-

age 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 carry-

ing capacity and rating.

- Cables that are too small may leak, gener-

ate 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 preci-

sion 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, com-

munication station, or similar place, provide

sufficient protection against noise.

- The inverter equipment, private power gen-

erator, high-frequency medical equipment,

or radio communication equipment may

cause the air conditioner to operate erro-

neously, or fail to operate. On the other

hand, the air conditioner may affect such

equipment by creating noise that disturbs

ENGLISH

medical treatment or image broadcasting.

• Do not install the product where it is ex-

posed to sea wind (salt spray) directly.

- It may cause corrosion on the product. Cor-

rosion, particularly on the condenser and

evaporator fins, could cause product mal-

function or inefficient operation.

Operation

• Do not use the air conditioner in special en-

vironments.

- Oil, steam, sulfuric smoke, etc. can signifi-

cantly 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 acci-

dent.

• Make the connections securely so that the

outside force of the cable may not be ap-

plied to the terminals.

- Inadequate connection and fastening may

generate 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 leak-

age.

• Be very careful about product transportation.

- Only one person should not carry the prod-

uct if it weighs more than 20 kg.

- Some products use PP bands for packag-

ing. 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, sus-

pending 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 packag-

ing 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 turn-

ing on the main power switch can result in

severe damage to internal parts. Keep the

power switch turned on during the opera-

tional 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 condi-

tioner is plugged in.

- There are sharp and moving parts that could

cause personal injury.

ENGLISH

TABLE OF CONTENTS

2 TIPS FOR SAVING ENERGY

2 IMPORTANT SAFETY INSTRUCTIONS

5 INSTALLATION PROCESS

6 OUTDOOR UNITS INFORMATION

6 BEFORE INSTALLATION

7 SELECT THE BEST LOCATION

8 INSTALLATION SPACE

9 INSTALLATION

11 REFRIGERANT PIPING

19 ELECTRICAL WIRING

25 TEST RUN

33 CAUTION FOR REFRIGERANT LEAK

34 INSTALLATION GUIDE AT THE SEASIDE

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

Automatic addressing of indoor unit

Airtight test

Heat insulation work

Make sure airﬂow is sufﬁcient

Duct work

Adjust to downward gradient

Drain pipe work

Refrigerant piping work

Installation of indoor unit

Sleeve and insert work

Preparation of contract drawings

Indicate clearly who is to be responsible for switch settings

Determination of division work

Vacuum drying

Additional charge of refrigerant

Fit facing panels

Test run adjustment

Transfer to customer with explanation

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

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

) 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. (In case of outdoor temperature below 10°C(

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

Make sure no gaps are left where

the insulating materials are joined

Electrical work

(connection circuits

and drive circuits)

CAUTION

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

operations are normally carried out but this order may be varied

where local conditions warrants such change.

• The thickness of the piping should comply with the relevant

local and national regulations for the designed pressure 3.8MPa.

• 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.)

ENGLISH

CAUTION

• 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 in-

door unit capacity.

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 re-

frigerant 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 be-

cause it is expensive in comparison with R22.

Chassis U3 U4

External

Apperance

Outdoor Fan 2 FAN 1 FAN

Phase 1Ø 3Ø 1Ø

PFC PFC PFC Active Filter PFC

Model

Heat

Pump

ARUN50GS2A

ARUN60GS2A

ARUN40LS2A

ARUV50LS2A

ARUN60LS2A

ARUN40LS2B

ARUN50LS2B

ARUN60LS2B

ARUN40GS2A

Cooling

Only

ARUV60GS2A

ARUV40LS2A

ARUV50LS2A

ARUV60LS2A

ARUV40LS2B

ARUV50LS2B

ARUV60LS2B

ARUV50GS2A

ARUV40GS2A

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

Connectable Indoor Unit

Heat Pump Model

Chassis

System(HP)

Model

Refrigerant

Product charge kg

CF(Correction Factor)

Max. Connectable No. of Indoor Units

Net Weight(Gross Weight) kg

Dimensions(WxHxD)

inch

Connecting

Pipes

Liquid Pipes

inch

Gas Pipes

inch

Connection Type

U4 U3 U3

456

ARUN40GS2A ARUN50GS2A ARUN60GS2A

1.8 3.0 3.0

000

689

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

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

*A:PFC model, B:Active Filter model

Chassis

System(HP)

Model

Refrigerant

Product charge kg

CF(Correction Factor)

Max. Connectable No. of Indoor Units

Net Weight(Gross Weight) kg

Dimensions(WxHxD)

inch

Connecting

Pipes

Liquid Pipes

inch

Gas Pipes

inch

Connection Type

U3 U3 U3

456

ARUN40LS2* ARUN50LS2* ARUN60LS2*

ARUV40LS2* ARUV50LS2* ARUV60LS2*

3.0 3.0 3.0

-0.5 0 0

689

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

Cooling Only Model

Chassis

System(HP)

Model

Refrigerant

Product charge kg

CF(Correction Factor)

Max. Connectable No. of Indoor Units

Net Weight(Gross Weight) kg

Dimensions(WxHxD)

inch

Connecting

Pipes

Liquid Pipes

inch

Gas Pipes

inch

Connection Type

U4 U4 U3

456

ARUV40GS2A ARUV50GS2A ARUN60GS2A

1.95 1.95 3.0

000

689

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

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

Ex) ARNU07GSEA2

BEFORE INSTALLATION

Environment-friendly 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 consid-

ered 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.

OUTDOOR UNITS INFORMATION

ENGLISH

Transporting the Unit

- 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 specifica-

tion when installing.

* Product appearance may be different depending on model.

Air outlet grille Intake hole

Corner

Handle

Always hold the unit by the corners, as holding

it by the side intake holes on the casing may

cause them to deform.

Sub line

40° or less

WARNING

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. Other-

wise 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 chil-

dren 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 Out-

door Unit unstable, resulting in a fall.

SELECT THE BEST LOCATION

1 Select space for installing outdoor unit, which will meet the follow-

ing 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 pre-

vent any person or animal from accessing the outdoor unit.

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

rections 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 hu-

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

(Ex) Rooftop where sunshine always shines.

- Performance of heating will be reduced and preheat time of the in-

door 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 ex-

posed 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.

Air inlet grille

500

Strong

wind

Strong

wind

Blown

air

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

INSTALLATION SPACE

The following values are the least space for installation.

If any service area is needed for service according to field circum-

stance, obtain enough service space.

The unit of values is mm.

- Stand alone installation

Obstacle height of discharge side is higher than the unit

- Stand alone installation

Obstacle height of discharge side is lower than the unit

- Stand alone installation

500 or less

1000 or

00 or

500 or less

1000 or

150 or

[Unit:mm]

100 or

500 or

500 or less

1000 or

500 or

1000 or

500 or less

1000 or

100 or

100

[Unit:mm]

L > H

100 or

500 or

500 or less

1000 or

250 or

ore

1000 or

[Unit:mm]

L > H L > H

300 or

1000 or

500 or less

1000 or

300 or

1250 or more

100 or more

[Unit:mm]

L ≤ H L ≤ H

1000 or

100 or

0 or

500

or les

300 or

1000 or

mor

500 or les

1000 or

300 or

0 or

ore

200 or

1000 or

300 or

100 or

1000 or

200 or

[Unit:mm]

- Collective installation

L ≤ H L ≤ H

1000 or

300 or

500 or

0 or less

300 or

1500 or

100 or more

00 o

[Unit:mm]

- Collective installation

In case of obstacles on the suction side

In case of obstacles on the discharge side

In case of obstacles on the suction and the discharge side

ENGLISH

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.

- One row of stand alone installation

100 or

2000 or

200 or

1000 or

[Unit:mm]

300 or

3000 or

600 or

00 or

100 or

L ≤ H

[Unit:mm]

- Rows of collective installation (2 or more)

L should be smaller than H

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.

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

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

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

accumulate)

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

Unit facing the seasonal wind.

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.

[Unit:mm]

Foundation bolt executing method

200

Nut

200

Spring washer

Frame

Anti-vibration

materials

Four bolt are

required

3 thread ridges

H-Beam

Concrete

base

100

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

flaring work in the following procedure.

Cut the pipes and the cable

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

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

- Cut the pipes a little longer than measured distance.

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

Pipe

Reamer

Point down

Copper

tube

90°

Slanted Uneven Rough

Preparation of Piping

Flaring work

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

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 re-

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

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

ENGLISH

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

table above.

Check

- Compare the flared work with figure below.

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

ing work again.

Indoor unit

[kW(Btu/h]

Pipe " A "

Gas Liquid Gas Liquid

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

1.6~1.8

(0.63~0.71)

1.1~1.3

(0.43~0.51)

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

1.6~1.8

(0.63~0.71)

1.5~1.7

(0.59~0.67)

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

1.9~2.1

(0.75~0.83)

1.5~1.7

(0.59~0.67)

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Unit : mm(inch)

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 Tightening torque A Flare shape

mm N.m(kgf.cm) mm

90°

±2

5°

R=0.4~0.8

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

Outside diameter Torque

mm inch N.m(kgf

cm)

CAUTION

• Always use a charge hose for service port connection.

•

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

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

combination, When connecting the piping,

always use a spanner and torque wrench

in combination to tighten the flare nut.

• When connecting a flare nut, coat the

flare(inner and outer faces) with oil for

R410A(PVE) and hand tighten the nut

3 to 4 turns as the initial tightening.

Union

Opening shutoff valve

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

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.

Closing shutoff valve

1 Remove the cap and turn the valve clockwise with the 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

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)

Heat insulation

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 fol-

lowing 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 pip-

ing, add further 10mm to 30mm thickness material.

Indoor unit

Thermal insulator

(accessory)

Fastening band

(accessory)

Refrigerant piping

ENGLISH

REFRIGERANT PIPING

U3 Chassis (2 Fan Model)

Braze suitable field piping with service valve of gas pipe.

U4 Chassis (1Fan Model)

- 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.

Connecting the pipes to the outdoor unit

Possible direction for ﬁeld piping

CAUTION

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

• 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.

Wet towel

- The installation piping is connectable in four directions.(refer to figure

- When connecting in a downward direction, knock out the knockout

hole of the base pan.

(refer to figure2, figure3)

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.

Forward

Sideways

Downward

Back-

ward

Base pan

Knock-out

Gas side piping

(Bigger Dia.)

Liquid side piping

(Smaller Dia.)

Connecting wire

Putty or insulating material

(produced locally)

Drain hose

Connection pipe

Pipe knock

out during the

ground piping.

The centers correspond

with each other

Refrigerant pipe Flare nut

Flare nut

Socket ﬂare

Screw wrench

Torque wrench

Cap

Pipe

ENGLISH

Cautions for Handling Service Valve

- The service valves are closed at shipment from the factory

How to Use the Shut-Off Valve

Use hexagonal wrenches 4mm or 6mm

Opening the valve

- Place the hexagon wrench on the valve bar and turn counter-clock-

wise.

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

Closing the valve

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

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

CAUTION

Make sure to keep the valve open during operation.

Refrigerant pipe connection torque

Pipe external

diameter

6.35mm

(1/4")

9.52mm

(3/8")

12.7mm

(1/2")

15.88mm

(5/8")

Torque

180~250

kgf.cm

340~420

kgf.cm

550~660

kgf.cm

630~820

kgf.cm

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

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. Service point

2. Shut-off Valve

3. Filed piping connection

4. Valve cover

1. Spanner

2. Torque wrench

Direction to open Direction to open

CAUTION

1 Use the following materials for refrigerant piping.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness : Comply with the relevant local and national regu-

lations 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 materi-

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

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

ing 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 sep-

arately.

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 heat-

ing/cooling performance.

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

by .)

Outer diameter

[mm]

6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3

Minimum

thickness [mm]

0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99 1.1 1.21 1.35 1.43

Y branch

Header

4 branch 7 branch 10 branch

ARBLB01621, ARBLB03321,

ARBLB07121, ARBLB14521,

ARBLB23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

Ⓐ To Outdoor Unit

Ⓑ Sealed Piping

ENGLISH

No. Piping parts Name Selection of pipe size

①

Outdoor unit

↓

1st branching

section

Main pipe

②

Branching

section

↓

Branching

section

Branching

pipe

③

Branching

section

↓

Indoor unit

connecting

pipe

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

cient 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 re-

sult in a decline in heating/cooling performance, drip of conden-

sate and other such problems.

12 When connecting the refrigerant piping, make sure the service

valves of the Outdoor Unit is completely closed (the factory set-

ting) and do not operate it until the refrigerant piping for the Out-

side 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 pip-

ing or refrigerant oil.

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 refrig-

erant, the refrigerant cycle may malfunction and the unit may

be damaged.

- After selecting diameter of the refrigerant pipe to suit total ca-

pacity of the indoor unit connected after branching, use an ap-

propriate branch pipe set according to the pipe diameter of the

indoor unit and the installation pipe drawing.

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

can clog pipes and break equipment.

Selection of Refrigerant Piping

Allowable Length/Height Difference of Refrig-

erant Piping

Outdoor unit

Gas pipe

Main pipe

Liquid pipe

Branching

pipe

Branching

pipe

Indoor unit

Outdoor unit capacity

[kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

4HP Ø9.52(3/8) Ø15.88(5/8)

5HP Ø9.52(3/8) Ø15.88(5/8)

6HP Ø9.52(3/8) Ø19.05(3/4)

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)

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)

Size of main pipe

Pipe size of between branching sections

Connecting pipe size of indoor unit

Y Branch Method

Example : 5 Indoor Units con-

nected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

L150m

H 50m

l 40m

Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m

* : Assume equivalent pipe length of Y branch to be 0.5m, that of

header to be 1m, calculation purpose.

Longest pipe length Equivalent pipe length(*)

A+B+C+D+e ≤ 150m A+B+C+D+e ≤ 175m

Longest pipe length after 1st branch

B+C+D+e ≤ 40m

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 50m ( 40m : Outdoor Unit is lower than Indoor Units)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 15m

Header Method

Example : 6 Indoor Units con-

nected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch

Ⓓ : Sealed piping

L 150m

H 50m

40m

CAUTION

Indoor Unit should be installed at lower position than the header.

ENGLISH

Combination of Y branch/header method

Correction factor of Indoor unit

Example : 5 Indoor Units con-

nected

Ⓐ : Outdoor Unit

Ⓑ : 1st branch (Y branch)

Ⓓ : Indoor Unit

Ⓔ : Header

Ⓕ : Sealed piping

L 150m

40m

H 50m

Branch pipe can not be used after

header

Total pipe length = A+a+b+c+d+e+f ≤ 300m

* : Assume equivalent pipe length of Y branch to be 0.5m, that of

header to be 1m, calculation purpose.

Longest pipe length Equivalent pipe length(*)

A+f ≤ 150m A+f ≤ 175m

Longest pipe length after 1st branch

f ≤ 40m

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 50m (40m : Outdoor Unit is lower)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 15m

CAUTION

Indoor Unit should be installed at lower position than the header.

WARNING

Pipe length after header branching (a~f)

It is recommended that difference in length of the pipes con-

nected to the Indoor Units is minimized. Performance difference

between Indoor Units may occur.

Total pipe length = A+B+C+a+b+c+d+e ≤ 300m

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

* : Assume equivalent pipe length of Y branch to be 0.5m, that of

header to be 1m, calculation purpose.

Longest pipe length Equivalent pipe length(*)

A+B+b ≤ 150m A+B+b ≤ 175m

Longest pipe length after 1st branch

B+b ≤ 40m

Difference in height(Outdoor Unit ÷ Indoor Unit)

H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 15m

CAUTION

Indoor Unit should be installed at lower position than the header

WARNING

It is recommended that difference of piping length for pipes con-

nected to the Indoor Unit is

minimized. Performance difference between Indoor Units may

occur.

Downward Indoor Unit total 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)

The Amount of Refrigerant

The calculation of the additional charge should take into account the

length of pipe.

Example : 5 HP

L2 L3

abcd

1WAY

2.2kW

2WAY

5.6kW

4WAY

2.2kW

4WAY

7.1kW

Length(m) of

liquid pipe of Ø9.52mm

Additional

charge(kg)

Total

charge(kg)

Additional

charge(kg)

Product

charge(kg)

Length(m) of

liquid pipe of Ø6.35mm

Correction factor of

outdoor unit

Correction factor of

Indoor unit

Product charge(kg)

x 0.061(kg/m)

x 0.022(kg/m)

Additional charge amount R (kg)

= (Lx x 0.022kg/m) + (Ly x 0.061kg/m) + Correction factor of outdoor

unit + Correction factor of indoor unit

= (12 x 0.022kg/m) + (28 x 0.061kg/m) + 0 + 0.2 + 0.16 + 0.25 + 0.48

= 3.062

Lx : Real total length of liquid pipe Ø6.35(m)

Ly : Real total length of liquid pipe Ø9.52(m)

L1 Ø9.52:10m L2 Ø9.52:10m L3 Ø9.52:5m

a Ø9.52:3m b Ø6.35:3m c Ø6.35:4m d Ø6.35:5m

1.6

(5.5)

2.2

(7.5)

2.8

(9.6)

3.6

(12.3)

4.5

(15.4)

5.6

(19.1)

7.1

(24.2)

8.2

(28.0)

10.6

(36.2)

12.3

(42.0)

14.1

(48.1)

Capacity : kW(kBtu)

Indoor unit

(unit : kg)

- 0.17 0.17 0.17 0.17 0.37 0.37 - - - -

- 0.17 0.17 0.17 0.17 0.26 0.26 0.44 0.44 0.44 0.62

- 0.24 0.24 0.24 0.24 0.28 0.28 - - - -

- 0.20 0.20 0.20 - 0.29 0.29 - - - -

- - - - - 0.16 0.16 - - - -

0.25 0.25 0.25 0.25 0.32 0.32 0.48 0.48 0.64 0.64 0.64

- 0.10 0.10 0.10 0.10 0.29 0.29 - - - -

- 0.17 0.17 0.17 0.17 0.37 0.37 - - - -

Ceiling Concealed Duct(Low Static)

Ceiling Concealed Duct(High Static)

Wall Mounted

1WAY Ceiling Cassette

2WAY Ceiling Cassette

4WAY Ceiling Cassette

Artcool

Floor Standing

NOTE

Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated

greenhouse gases

① Manufacturing site (See Model Name label)

② Installation site (If possible being placed adjacent to the service points for

the addition or removal of refrigerant)

③ The total Charge (①+②)

ENGLISH

WARNING

• Regulation for refrigerant leakage

: the amount of refrigerant leakage should satisfy the following

equation for human safety.

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

ing steps.

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

- Installation of effective opening part

- Reconfirmation of Outdoor Unit capacity and piping length

- Reduction of the amount of refrigerant

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

• Change Indoor Unit type

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

mounted type → Cassette type)

• Adoption of ventilation system

: choose ordinary ventilation system or building ventilation sys-

tem

• Limitation in piping work

: Prepare for earthquake and thermal stress

Volume of the room at which Indoor Unit of

the least capacity is installed

Total amount of refrigerant in the system

≤0.44 (kg / m

)

CAUTION

If a negative result is obtained from the calculation, no refrigerant

needs to be added.

WARNING

Refer to model information since the CF Value of correction factor

differs depending on model.

- Ensure that the branch pipes are attached vertically.

Header

1st

Main pipe

Distribution

2nd

3rd

3nd

Main pipe

Distribution

1st

3rd

3rd main pipe distribution

2nd

Line Distribution

Vertical Distribution

The others

Distribution Method

ENGLISH

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

pipes is less than the number of branch pipes available for connection

then cap pipes should be fitted to the surplus branches.

- Fit branch pipe lie in a horizontal plane.

Pinched pipe

Horizontal plane

View from point B in the direction of the arrow

Y branch

Header

Facing

upwards

Facing

downwards

Within ±3° Within ±3°

Viewed from point A

in direction of arrow

Horizontal

plane

Within ±10°

Ⓐ To Branch Piping or Indoor Unit

Ⓑ To Outdoor Unit

- Ensure that the branch pipes are attached horizontally or vertically

(see the diagram below.)

Ⓐ To Outdoor Unit

Ⓑ To Indoor Unit

- The indoor unit having larger ca-

pacity must be installed closer to

Ⓐ than smaller one.

- If the diameter of the refrigerant

piping selected by the proce-

dures described is different from

the size of the joint, the connect-

ing section should be cut with a

pipe cutter.

- When the number of pipes to be

connected is smaller than the

number of header branches, in-

stall a cap to the unconnected

branches.

Branch pipe Fitting

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

- Joints between branch and pipe should be sealed with the tape in-

cluded in each kit.

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

each kit and then taped as described above.

h For example. Indicated Ø9.52 is the outer diameter(O.D..) of field

jointed piping

Insulate the header using

the insulation

material attached to the

branch pipe kit

as shown in the ﬁgure.

Insulator

Insulator of ﬁeld pipe

Tape

Cap pipe

Insulator for cap pipe

Y Branch

Models Gas pipe Liquid pipe

ARBLN

01621

I.D19.0 5

O.D15.88

I.D12.7

I.D15.88

I.D12.7

I.D15.88

I.D12.7

292

281

I.D12.7

O.D9.52

I.D6.35

I.D9.52

I.D.9.52

I.D.6.35

I.D9.52

I.D.6.35

292

281

ARBLN

03321

I.D25.4

413

390

I.D15.88

I.D19.0 5

I.D12.7

I.D12.7I.D19.0 5I.D15.88I.D19.0 5I.D22.2

I.D28.58

O.D25.4

I.D22.2

O.D19.0 5

I.D22.2

I.D25.4

70 80 11 0

3 1 2

I.D9.52

I.D12.7

53.6D.I25.9D.I

I.D9.52

I.D12.7

I.D6.35

I.D12.7

332

321

ARBLN

07121

376

404

I.D34.9

O.D31.8

I.D22.2

O.D22.2

I.D28.58

I.D31.8

O.D19.0 5

I.D28.58

120 90 120

I.D31.8

2.22D.I85.82D.I

I.D19.0 5

I.D15.88

I.D12.7

I.D19.0 5

I.D15.88

1 3

25.9D.I25.9D.I7.21D.O

I.D15.88 I.D19.05

I.D12.7

I.D19.0 5

I.D15.88I.D12.7

I.D19.0 5

O.D12.7I.D6.35

I.D15.88

371

394

11 0 70

3 2

ARBLN

14521

471

517

125

120 130

I.D19.0 5

I.D15.88

I.D12.7

I.D19.0 5

I.D22.2

I.D41.3 I.D38.1

I.D41.3

O.D34.9

I.D34.9

I.D22.2

I.D28.58

I.D28.58I.D38.1

I.D41.3

I.D34.9

I.D38.1

O.D22.2

O.D38.1

O.D15.88

O.D28.58

416

444

O.D15.88 I.D9.52

I.D12.7

O.D12. 7 I.D6.35

I.D9.52

I.D15.88 I.D19.0 5

I.D22.2

I.D19.0 5

I.D15.88

I.D12.7

I.D15.88

I.D19.05

I.D22.2

O.D19.0 5

11 0 11 0

2 3 3

[unit:mm]

Selection of Y Branch and Header

ENGLISH

[unit:mm]

Header

Models Gas pipe Liquid pipe

4 branch

ARBL054

120

150

360

120

ID15.88

ID12.7

ID15.88

ID19.05

120

150

360

ID9.52

ID6.35

ID9.52

ID12.7

7 branch

ARBL057

540

ID15.88

ID19.05

120

150

120

ID15.88

ID12.7

ID15.88

ID12.7

ID15.88

ID19.05

540

ID9.52

ID12.7

120

150

120

ID6.35

ID9.52

ID12.7

4 branch

ARBL104

120

150

400

160

ID15.88

ID12.7

ID19.05

ID15.88

ID22.2

ID28.58 ID25.4

120

150

360

ID9.52

ID6.35

ID9.52

ID12.7

7 branch

ARBL107

120

150

160

580

ID19.05

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

120

150

700

120

ID6.35

ID9.52

ID6.35

ID9.52ID12.7

10 branch

ARBL1010

120

150

160

760

ID19.05

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

120

150

160

760

ID19.05

ID15.88

ID12.7

ID22.2ID28.58 ID25.4

10 branch

ARBL2010

120

150

182

775

ID19.05

ID15.88

ID12.7

ID28.58

ID31.8 ID34.9

120

150

107

60*9=540

700

ID6.35

ID9.52

ID19.05ID15.88

ID9.52

ID6.35

Leak test

Leak test should be made by pressurizing nitrogen gas to 3.8

MPa(38.7kgf/cm

). If the pressure does not drop for 24 hours, the sys-

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

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

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

gas pipe and high/low pressure common pipe)

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

after leaving for about one day after completion of nitrogen gas pres-

surization.

During this test, set DIP switch as Vacuum Mode.

Nitrogen gas

cylinder

Liquide pipe

Gas pipe

Leak Test and Vacuum drying

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 0.1 kg/cm

(0.01 MPa) 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

(3.8 MPa) is 27 °C

24 hour later: 3.73 MPa, 20°C

In this case the pressure drop of 0.07 is because of tem-

perature drop And hence there is no leakage in pipe oc-

curred.

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.

Vacuum

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

outdoor unit’s service valve to the vacuum pump commonly used for

liquid pipe, gas pipe. Vaccum of the pipe and the indoor units should

be made from the port of the outdoor unit's service valve with the

service valve closed.

* Never perform air purging using refrigerant.

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

(5 Torr, -755mmHg).

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

pump for over 2 hrs and bring the system to -100.7kPa.

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

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

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

maining 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(vacuum break) with nitrogen gas and then evacuate it again

with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the

system cannot be evacuated to -100.7kPa within 2 hrs, repeat the

steps of vacuum break and its drying.

Finally, check if the vacuum gauge does not rise or not, after main-

taining the system in vacuum for 1 hr.

Vacuum pump

Liquid pipe

Gas pipe

ENGLISH

CAUTION

Never charge the refrigerant with service valves closed and unit

stopped.

If charging is carried out with service valves closed and unit

stopped, the compressor will be damaged. When unit starts to

run, and the unit will display ch26 error.

If trying to keep running under this condition, compressor will be

broken.

Refrigerant charging

Follow following procedure to charge the refrigerant.

- Open all service valves

- Run the unit with cooling mode

- Charging the refrigerant to gas service valve during operation.

Refrigerant

cylinder

Open Open

Charging during

cooling operation

Liquid pipe

Gas pipe

WARNING

• If the primary charging is not performed after vacuum, wet air

may go into the outdoor unit. If air is mixed with the refrigerant,

the refrigerant cycle may malfunction and the unit may be dam-

aged.

• Charging of refrigerant while the compressor is working is pro-

hibited. Otherwise, liquid may go into the compressor. It may

cause faults of the compressor.

• Use a gravimeter accurate to 0.1kg.

• If other refrigerants are mixed in the original refrigerant, a refrig-

erant cycle may cause malfunction or damage.

• Add accurate refrigerant quantity via calculation.

Too much or too little refrigerant may cause problems

• Repeated on and off of the indoor units without charging refrig-

erant may cause faults of EEV.

• Since R410A is a mixed refrigerant, the required additional refrig-

erant 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.

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

pipe and gas pipe separately with enough thickness heat-resistant poly-

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

and insulating material, and insulating materials themselves. When in-

sulation work is insufficient, there is a possibility of condensation drip,

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

Ⓐ Heat insulation material

Ⓑ Pipe

sulation material with a finishing tape.)

Heat insulation

material

Adhesive + Heat - resistant poly-

ethylene foam + Adhesive tape

Outer

covering

Indoor Vinyl tape

Floor ex-

posed

Water-proof hemp cloth +

Bronze asphalt

Outdoor

Water-proof hemp cloth +

Zinc plate + Oily paint

NOTE

When using polyethylene cover as covering material, asphalt roof-

ing shall not be required.

Bad example

Thermal insulation of refrigerant piping

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

sure pipe together.

• Be sure to fully insulate connecting portion.

Ⓐ

These parts are not insulated.

Ⓐ Liquid pipe

Ⓑ Gas pipe

ⓓ

Finishing tape

ⓔ

Insulating material

ⓕ

Communication lines

Good example

Ⓐ Liquid pipe

Ⓑ Gas pipe

ⓓ

Insulating material

ⓔ

Communication lines

Separation

Power lines

ENGLISH

1m1m

Penetrations

Ⓐ Sleeve

Ⓑ Heat insulating material

Ⓓ Caulking material

Ⓔ Band

Ⓕ Waterproofing layer

Ⓖ Sleeve with edge

Ⓗ Lagging material

Ⓘ Mortar or other incombustible caulking

Ⓙ Incombustible heat insulation material

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

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

bustible materials for both insulation and covering. (Vinyl covering should not

be used.)

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

Floor (fireproofing)

Penetrating portion on fire

limit and boundary wall

Roof pipe shaft

CAUTION

- Follow ordinance of your governmental organization for technical

standard related to electrical equipment, wiring regulations and guid-

ance of each electric power company.

Install the Outdoor Unit communication cable away from the power

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

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

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

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

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

service work.

- Never connect the main power source to terminal block of communi-

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

- Use 2-core shield cable for communication cable.(O mark in the figure

below) If communication cable of different systems are wired with

the same multiplecore cable, the resultant poor transmitting and re-

ceiving will cause erroneous operations. ( mark in the figure

below)

- Only the communication cable specified should be connected to the

terminal block for Outdoor Unit communication.

CAUTION

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

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

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

CAUTION

• This product have reversed phase protection detector that only

works when the power is turned on. If there exists black out or the

power goes on and off which the product is operating, attach a re-

versed phase protection circuit locally. running the product in re-

versed phase may break the compressor and other parts.

• Use the 2-core shield cables for communication lines. Never use

them together with power lines.

• 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 in-

stall a phase leading capacitor.

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

it is greater, the unit’s lifespan will be reduced.

• Introducing with a missing N-phase or with a mistaken N-phase will

break the equipment.

CAUTION

The Power cord connected to the unit should be selected according

to the following specifications.

WARNING

Be sure to have authorized electrical engineers do the electric

work using special circuits in accordance with regulations and this

installation manual.

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

ciency, it may cause an electric shock or fire.

ELECTRICAL WIRING

2-Core Shield Cable

Multi-Core Cable

Remote

control

Remote

control

Remote

control

Remote

control

Indoor

Unit

Outdoor Unit

Indoor

Unit

Indoor

Unit

Indoor

Unit

Outdoor Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

Remote

control

Remote

control

Indoor

Unit

Indoor

Unit

ENGLISH

Communication and Power Cables

Communication cable

- Types : shielding wire

- Cross section : 1.0 ~ 1.5 mm

- Insulation material : PVC

- Maximum allowable temperature: 60°C

- Maximum allowable line length: under 300m

Remote control cable

- Types : 3-core cable

Central control cable

- Types : 4-core cable (Shielding wire)

- Cross section : over 1.0~1.5 mm

- Insulation material : PVC

Separation of communication and power cables

- If communication and power lines are run alongside each other then

there is a strong likelihood of operational faults developing due to in-

terference in the signal wiring caused by electrostatic and electro-

magnetic coupling.

In case of install communication and power line together, the dis-

tance should be over 50mm

Distance from power of other facility

Current capacity of power line Spacing

100V or more

10A 300mm

50A 500mm

100A 1000mm

Exceed 100A 1500mm

NOTE

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

to 100m. For length in excess of 100m the figures will have to

be recalculated in direct proportion to the additional length of

cable involved.

• If the power supply waveform continues to exhibit some distor-

tion the recommended spacing in the table should be increased.

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

must also be taken into account when grouping various cable

together for introduction into the conduits

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

communication cables must not be laid inside the same

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

munication cables should not be bunched together.

CAUTION

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

electric shocks, the earthing of the

apparatus must be carried out by a qualified person.

• Use a power wire pipe for the power wiring.

Wiring of main power supply and equipment

capacity

Outdoor unit (1Ø, 220~240V, 50Hz/ 1Ø, 220V, 60Hz/ 3Ø, 380~415V,

50Hz/ 3Ø, 380V, 60Hz)

Indoor unit (1Ø,220V, 50/60Hz)

- Separate power supply lines for the indoor units from outdoor unit.

- Bear in mind ambient conditions (ambient temperature,direct sun-

light, rain water,etc.) when proceeding with the wiring and connec-

tions.

- 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%.

- Specific wiring requirements should adhere to the wiring regulations

of the region.

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

be lighter than polychloroprene sheathed flexible cord.

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

each of indoor unit separately from the power supply.

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 ca-

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

may cause a malfunction of unit or fire.

WARNING

• Follow ordinance of your governmental organization for techni-

cal standard related to electrical equipment, wiring regulations

and guidance of each electric power company.

• Make sure to use specified wires for connections so that no ex-

ternal force is imparted to terminal connections. If connections

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

• Make sure to use the appropriate type of overcurrent protection

switch. Note that generated overcurrent may include some

amount of direct current.

Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal

block.

Round pressure terminal

Power cable

When none are available, follow the instructions below.

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

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

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

the figure below.

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

secure to prevent outside pressure being exerted on the terminal

block.

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

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

tighterning impossible.

- Over-tightening the terminal screws may break them.

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LG ARUN40GS2A User manual

Brand: LG

Model: ARUN40GS2A

Category: Split-system air conditioners

Type: User manual

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LG ARUN40GS2A User manual

LG ARUN40GS2A User manual

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