LG LA120HPI User manual

LG

Room Air Conditioner

SERVICE MANUAL

LG

MODELS: LAN091CNP (ASNC091F2G0)

LAU091CNP (ASUC091FUG0)

LAN121CNP (ASNC121F2G0)

LAU121CNP (ASUC121FUG0)

LAN091HNP (ASNH091F2G0)

LAU091HNP (ASUH091FUG0)

LAN121HNP (ASNH121F2G0)

LAU121HNP (ASUH121FUG0)

LA090CPI (ASNC091F2G0)

LA090CPO (ASUC091FUG0)

LA120CPI (ASNC091F2G0)

LA120CPO (ASUC091FUG0)

LA090HPI (ASNH091F2G0)

LA090HPO (ASUH091FUG0)

LA120HPI (ASNH121F2G0)

LA120HPO (ASUH121FUG0)

CAUTION

website http://www.lgservice.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY

PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2 Room Air Conditioner

Air Conditioner Service Manual

TABLE OF CONTENTS

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

Dimensions.......................................................................................................................................................................9

Symbols Used in this Manual .....................................................................................................................................9

Indoor Unit ..................................................................................................................................................................9

Outdoor Unit .............................................................................................................................................................10

Product Specifications ..................................................................................................................................................11

Installation ......................................................................................................................................................................12

Installation Parts .......................................................................................................................................................12

Installation Tools.......................................................................................................................................................12

Installtion Map...........................................................................................................................................................13

Confirm the Refrigerant ............................................................................................................................................14

Select the best Locations..........................................................................................................................................15

Piping Length and Elevation.....................................................................................................................................16

Preparing Work for Installation .................................................................................................................................17

Fixing Indoor Unit......................................................................................................................................................18

Flaring work and connection of piping ........................................................................................................................19

Flaring work ..............................................................................................................................................................19

Connection of piping-Indoor......................................................................................................................................20

Connection of the drain hose....................................................................................................................................21

Connection of piping-Outdoor...................................................................................................................................23

Connecting the cable between indoor unit and outdoor unit ....................................................................................24

Connect the cable to the Indoor unit.........................................................................................................................24

Connection method of the connecting cable(Example)............................................................................................25

Checking the drainage and forming the pipings.........................................................................................................26

Checking the drainage..............................................................................................................................................27

Forming the piping....................................................................................................................................................28

AIR PURGING .................................................................................................................................................................29

Air purging ................................................................................................................................................................29

Charging ...................................................................................................................................................................31

Panel front assembly ................................................................................................................................................32

Test running..............................................................................................................................................................33

How to replace picture & photograph..........................................................................................................................35

Operation ........................................................................................................................................................................36

Functions ..................................................................................................................................................................36

The function of main control .....................................................................................................................................37

Display Function ......................................................................................................................................................43

Self-diagnosis Function ............................................................................................................................................43

Remote Control Operations......................................................................................................................................44

Disassembly ...................................................................................................................................................................45

Indoor Unit ................................................................................................................................................................45

Schematic Diagram........................................................................................................................................................47

Heat Pump/Cooling Only Series(Indoor Unit)...........................................................................................................47

Heat Pump Series (Outdoor Unit).............................................................................................................................48

INDOOR UNIT P.W.B. ASSEMBLY .........................................................................................................................49

OUTDOOR UNIT P.W.B. ASSEMBLY .....................................................................................................................50

DISPLAY P.W.B. ASM..............................................................................................................................................51

Wiring Diagram.........................................................................................................................................................52

Troubleshooting Guide..................................................................................................................................................54

Refrigeration Cycle Diagram.....................................................................................................................................54

Pipe length and the elevation ...................................................................................................................................55

3-way Valve ..............................................................................................................................................................56

Cycle Parts ...............................................................................................................................................................62

Electronic Parts.........................................................................................................................................................63

Exploded View................................................................................................................................................................72

Replacement Parts List..................................................................................................................................................74

Service Manual 3

Safety Precautions

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

be followed.

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

classified by the following indications.

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

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

■ Installation

Do not use damaged power

cords, plugs, or a loose socket.

• There is risk of fire or electric

shock.

For electrical work, contact the

dealer, seller, a qualified electri-

cian, or an Authorized Service

Center.

• There is risk of fire or electric

shock.

Always use the power plug and

socket with the ground terminal.

• There is risk of electric shock.

Install the panel and the cover of

control box securely.

• There is risk of fire or electric

shock.

Do not modify or extend the

power cord.

• There is risk of fire or electric

shock.

Do not install, remove, or re-

install the unit by yourself (cus-

tomer).

• There is risk of fire, electric shock,

explosion, or injury.

4 Room Air Conditioner

Safety Precautions

■ Operation

Be cautious when unpacking and

installing the product.

• Sharp edges could cause injury. Be

especially careful of the case

edges and the fins on the con-

denser and evaporator.

For installation, always contact

the dealer or an Authorized

Service Center.

• There is risk of fire, electric shock,

explosion, or injury.

Do not install the product on a

defective installation stand.

• It may cause injury, accident, or

damage to the product.

Be sure the installation area

does not deteriorate with age.

• If the base collapses, the air condi-

tioner could fall with it, causing

property damage, product failure,

and personal injury.

Do not let the air conditioner run

for a long time when the humidity

is very high and a door or a win-

dow is left open.

• Moisture may condense and wet or

damage furnishings.

Take care to ensure that power

cords could not be pulled out or

damaged during operation.

• There is risk of fire or electrical

shock.

Do not place anything on the

power cord.

• There is risk of fire or electric

shock.

Do not turn the air-conditioner

ON or OFF by plugging or

unplugging the power plug.

• There is risk of fire or electrical

shock.

Service Manual 5

Safety Precautions

Use a dedicated outlet for this

appliance.

• There is risk of fire or electrical

shock.

Grasp the plug to remove the

cord from the outlet. Do not

touch it with wet hands.

• There is risk of fire or electrical

shock.

Do not place a heater or other

appliances near the power cable.

• There is risk of fire and electric

shock.

Do not allow water to run into

electric parts.

• It may cause There is risk of fire,

failure of the product, or electric

shock.

Do not store or use flammable

gas or combustibles near the air

conditioner.

• There is risk of fire or failure of

product.

Do not use the product in a tight-

ly closed space for a long time.

• Oxygen deficiency could occur.

Wax

Thinner

When flammable gas leaks, turn

off the gas and open a window

for ventilation before turn the

product on. DO NOT use the tele-

phone or turn switches on or off.

• There is risk of explosion or fire.

Unplug the unit if strange

sounds, odors, or smoke comes

from it.

• There is risk of electrical shock or

fire

Stop operation and close the

window in storm or hurricane. If

possible, remove the air condi-

tioner from the window before

the hurricane arrives.

• There is risk of property damage,

failure of product, or electric shock.

6 Room Air Conditioner

Safety Precautions

■ Installation

Do not open the inlet grill 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.

When the product is soaked

(flooded or submerged), contact

an Authorized Service Center.

• There is risk of fire or eletric

shock.

Ventilate the product from time

to time when operating it togeth-

er with a stove, etc.

• There is risk of fire or electrical

shock.

Unplug the appliance before per-

forming cleaning or mainte-

nance.

• There is risk of electrical shock.

When the product is not be used

for a long time, disconnect the

power supply plug or turn off the

breaker.

• There is risk of product damage or

failure, or unintended operation.

Take care to ensure that nobody

could step on or fall onto the

outdoor unit.

• This could result in personal injury

and product damage.

Always check for gas (refriger-

ant) leakage after installation or

repair of product.

• Low refrigerant levels may cause

failure of product.

Install the drain hose to ensure

that water is drained away prop-

erly.

• A bad connection may cause water

leakage.

Keep level even when installing

the product.

• To avoid vibration or water leakage.

90˚

Service Manual 7

Safety Precautions

■ Operation

Do not install the product where

the noise or hot air from the out-

door unit could damage the

neighborhoods.

• It may cause a problem for your

neighbors.

Use two or more people to lift

and transport the air conditioner.

• Avoid personal injury.

Do not install the product where

it will be exposed to sea wind

(salt spray) directly.

• It may cause corrosion on the prod-

uct. Corrosion, particularly on the

condenser and evaporator fins,

could cause product malfunction or

inefficient operation.

Do not direct airflow at room

occupants. (Don't sit in the

draft.)

• This could damage your health.

Do not use the product for spe-

cial purposes, such as preserv-

ing 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.

Do not block the inlet or outlet of

air flow.

• It may cause product failure.

Use a soft cloth to clean. Do not

use harsh detergents, solvents,

etc.

• There is risk of fire, electric shock,

or damage to the plastic parts of

the product.

Do not touch the metal parts of

the product when removing the

air filter. They are very sharp!

• There is risk of personal injury.

Do not step on or put anyting on

the product. (outdoor units)

• There is risk of personal injury and

failure of product.

8 Room Air Conditioner

Always insert the filter securely.

Clean the filter every two weeks

or more often if necessary.

• A dirty filter reduces the efficiency

of the air conditioner and could

cause product malfunction or dam-

age.

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.

Do not drink the water drained

from the unit.

• It is not sanitary and could cause

serious health issues.

Use a firm stool or ladder when cleaning or main-

taining the air conditioner.

• Be careful and avoid personal injury.

Replace the all batteries in the remote control with

new ones of the same type. Do not mix old and new

batteries or different types of batteries.

• There is risk of fire or explosion

Do not recharge or disassemble the batteries. Do

not dispose of batteries in a fire.

• They may burn or explode.

If the liquid from the batteries gets onto your skin

or clothes, wash it well with clean water. Do not use

the remote if the batteries have leaked.

• The chemicals in batteries could cause burns or other

health hazards.

■ Disuse

Safety Precautions

Service Manual 9

Dimensions

Indoor Unit

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that could cause harm to the

air conditioner.

This symbol indicates special notes.

NOTICE

Symbols Used in this Manual

Pipe Hole

Fix Hole

Hanger Hole

H

W

D

W mm(inch) 600(23.6)

H mm(inch) 600(23.6)

D mm(inch) 146(5.7)

Model

Dimension

INDOOR UNIT

10 Room Air Conditioner

Dimensions

Outdoor Unit

W

L2

L3

L1

D

H

L4

L5

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

9k, 12k Models

DIM unit

W mm 770(30.3)

H mm 540(21.3)

D mm 245(9.6)

L1 mm 285(11.2)

L2 mm 64(2.5)

L3 mm 518(20.4)

L4 mm 10(0.4)

L5 mm 100(3.9)

Service Manual 11

Product Specifications

Models

Cooling Capacity kW

(Min~Rating~Max) Btu/h

Heating Capacity kW

(Min~Rating~Max) Btu/h

Power Input Cooling/Heating W

Running Current Cooling/Heating A

Starting Current Cooling/Heating A

EER

W/W

Btu/h.W

COP W/W

Power Supply Ø / V / Hz

Power Factor %

Air Flow Rate

Indoor,Max

m

3

/min(cfm)

Outdoor,Max

m

3

/min(cfm)

Moisture Removal l/h

Sound Level

Indoor,H/M/L dB(A)+3

Outdoor,Max dB(A)+3

Refrigerant & Charge(at 7.5m) g(oz)

Compressor

Type

Model

Motor Type

Oil Type

Oil Charge cc

O.L.P Name

Fan(Indoor)

Type

Motor Output W

Fan(outdoor)

Type

Motor Type

Motor Output W

Circuit Breaker* A

Power Supply Cable No.*mm

2

Power and Transmission Cable

No.*mm

2

+No.mm

2

Piping Liquid Side mm(in)

Connections Gas Side mm(in)

Drain Hose O.D , I.D mm(in)

Indoor(W*H*D)

mm

Dimension

inch

Outdoor(W*H*D)

mm

inch

Indoor kg(lbs)

Net Weight

Outdoor kg(lbs)

Tool Code(Chassis) Indoor + Outdoor

Temperature Control

Functions Plasma Filter

Prefilter(washable/anti-fungus)

Auto Clean

CHAOS Wind(Auto Wind)

Steps, Fan/Cool/Heat

Airflow Direction Control(up&down)

Airflow Direction Control(left&right)

Remocon Type

Setting Temperature Cooling

Range Heating

Auto Operation (Micom Control)

Auto Changeover (Micom Control)

Self Diagnosis

Timer

Sleep Operation

Soft Dry Operation

Restart Delay(minute)

Deice Control(Defrost)

Hot Start

Jet Cool

Low Ambient Operation

Special Function

Network Functions

Dry Contact

Network Solution(LGAP)

PI485

2.87 3.37 2.87 3.37

9,800 11,500 9,800 11,500

- - 2.87 3.37

- - 9,800 11,500

980 1,100 980/980 1,100/1,100

9.4 10 9.4/9.4 10/10

57.0 57.0 57.0/57.0 57.0/57.0

2.93 3.06 2.93 3.06

10.0 10.5 10.0 10.5

- - 2.93 3.06

1/115/60 1/115/60 1/115/60 1/115/60

90.7 95.7 90.7 95.7

9.3(330) 9.3(330) 9.3(330) 9.3(330)

25(883) 25(883) 25(883) 25(883)

1.4 1.4 1.4 1.4

41/35/29 41/35/29 41/35/29 41/35/29

48 48 48 48

R410A, 900(31.8) R410A, 900(31.8) R410A, 900(31.8) R410A, 900(31.8)

Rotary Rotary Rotary Rotary

GK113CAA GK113CAA GK113CAA GK113CAA

PSC PSC PSC PSC

FVC68D(PVE) FVC68D(PVE) FVC68D(PVE) FVC68D(PVE)

330 330 330 330

MRA12053-12027 MRA12053-12027 MRA12053-12027 MRA12053-12027

Turbo Fan Turbo Fan Turbo Fan Turbo Fan

24 24 24 24

Propeller Propeller Propeller Propeller

AC Induction AC Induction AC Induction AC Induction

27 27 27 27

20 20 20 20

3*2.5 3*2.5 3*2.5 3*2.5

4*0.75 4*0.75 4*0.75 4*0.75

6.35(1/4) 6.35(1/4) 6.35(1/4) 6.35(1/4)

12.7(1/2) 12.7(1/2) 12.7(1/2) 12.7(1/2)

21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63) 21.5,16(0.85,0.63)

600*600*146 600*600*146 600*600*146 600*600*146

23.62*23.62*5.75 23.62*23.62*5.75 23.62*23.62*5.75 23.62*23.62*5.75

770*540*245 770*540*245 770*540*245 770*540*245

30.31*21.26*9.65 30.31*21.26*9.65 30.31*21.26*9.65 30.31*21.26*9.65

15(33.1) 15(33.1) 15(33.1) 15(33.1)

32(70.5) 32(70.5) 32(70.5) 32(70.5)

SF + UL SF + UL SF + UL SF + UL

Thermistor Thermistor Thermistor Thermistor

OOOO

3/4 3/4 3/4/3 3/4/3

Auto Auto Auto Auto

Wireless LCD Wireless LCD Wireless LCD Wireless LCD

18 ~ 30 18 ~ 30 18 ~ 30 18 ~ 30

- - 16 ~ 30 16 ~ 30

OOOO

24h, On/Off 24h, On/Off 24h, On/Off 24h, On/Off

OOOO

3333

--

OO

--

OO

OOOO

----

Note:

O : Applied, - : No relation

* For circuit breaker rating, please conform to local standards wherever necessary.

Some of functions are slightly different depending upon models.

The specification may be subject to change without notic for purpose of improvement.

AS-C091F2G0(LA091CNP)

AS-C091F2G0(LA090CP)

AS-C121F2G0(LA121CNP)

AS-C121F2G0(LA120CP)

AS-H091F2G0(LA091HNP)

AS-H091F2G0(LA090HP)

AS-H121F2G0(LA121HNP)

AS-H121F2G0(LA120HP)

12 Room Air Conditioner

Installation

Installation Parts

Installation Tools

Read carefully, and then follow step by step.

Type "A" screw and plastic anchor

Type "B" screw

Remote control holder

Installation guide map

Figure FigureName

Screw driver

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Ohmmeter

Hexagonal wrench

Ammeter

Leak detector

Thermometer,

Horizontal meter

Flaring tool set

Name

Service Manual 13

Installation Map

Installation parts you should purchase.

NOTICE

(Left and right

are identical)

More than

28"(70cm)

More than

23.6"(60cm)

Sleeve

Bushing-Sleeve

Putty(Gum Type Sealer)

Vinyl tape (Wide)

• To carry out the drainage

test, remove the air filter

and pour water into the heat

exchanger.

• Apply after carrying out a

drainage test.

Saddle

More than

19.6"(50cm)

Gas side piping (Optional part)

Liquid side piping (Optional part)

Additional drain pipe

Vinyl tape (Narrow)

Connecting cable

(Optional part)

Bend the pipe as close as possible

on the wall but be careful so that it

may not break.

More than

11.8"(30cm )

More than

11.8"(30cm )

More than

11.8"(30cm)

More than

11.8"(30cm)

More than More than

3.9"(10cm) 3.9"(10cm)

More than

7.9"(20cm)

Installation

14 Room Air Conditioner

1. Check the quality label on the indoor and outdoor unit.

2. Make certain that the refrigerant is R-410A.

THIS PRODUCT CONTAINS R-410A REFRIGERANT

1) Different compressor oil

- R-410A(Polyol ester) / R-22(Mineral).

- Do not mix the existing mineral oil.

- Do not apply used pipe, tools and gauges covered with the existing mineral oil.

2) Absorption of moisture

-Compressor’s oil has the high absorption rate of moisture.

3) Composition

- R-410A(R32:R125=50:50wt%).

NOTE: Never mix with other refrigerants

4) High pressure.

- 1.6 times higher than R-22.

- High Pressure refrigerant may cause personal injury.

Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury.

- manifold gauge ,charging and any piping tools must be dedicated to R-410A systems.

NOTICE

Confirm The Refrigerant

Boiling Pt.(

°C) Vapor pressure(25°C)(kg f/cnf) Vapor density(25°C)(kg/m

2

)

R-410A -51.4 15.9 64

R-22 -40.8 9.6 44.4

Example : Split type 12,000 Btu/h

120

Capacity

[%]

100

100%

100%70%50%30%0%

70% 50% 30%

0%

100

93

89

84

76

80

60

40

20

0

R-410A

R-22

Installation

Service Manual 15

Indoor unit

1. Do not have any heat or steam near the unit.

2. Select a place where there are no obstacles in front

of the unit.

3. Make sure that condensation drainage can be conve-

niently routed away.

4. Do not install near a doorway.

5. Ensure that the interval between a wall and the left

(or right) of the unit is more than 19.6"(50cm). The

unit should be installed as high as possible on the

wall, allowing a minimum of 7.9"(20cm) from ceiling.

6. Use a stud finder to locate studs to prevent unneces-

sary damage to the wall.

Outdoor unit

1. If an awning is built over the unit to prevent direct

sunlight or rain exposure, make sure that heat radia-

tion from the condenser is not restricted.

2. Ensure that the space around the back and sides is

more than 11.8"(30cm). The front of the unit should

have more than 28"(70cm) of space.

3. Do not place animals and plants in the path of the

warm air.

4. Take the weight of the air conditioner into account

and select a place where noise and vibration are min-

imum.

5. Select a place where the warm air and noise from the

air conditioner do not disturb neighbors.

Select the best Location

More than

7.9"(20cm)

More than

19.6"(50cm)

More than

4.9ft(1.5m)

More than

19.6"(50cm)

CAUTION: Install the indoor unit on the wall where the height from the floor is

more than 4.9 feets(1.5 meters).

More than

11.8"(30cm)

More than

11.8"(30cm)

More than

23.6"(60cm)

More than

23.6"(60cm)

More than

28"(70cm)

Rooftop Installations

If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring

method are adequate for the unit location. Consult local codes regarding rooftop mounting.

If the outdoor unit is installed on roof structures or walls, this may result in excessive noise and vibration, and may

be also classed as non serviceable installation.

Installation

16 Room Air Conditioner

Piping Length and Elevation

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

If piping length is more than 16.4ft(5m)

CAUTION: Capacity is based on standard length and maximum allowance length is

on the basis of reliability.

Oil trap should be installed every 16.4~23feets (5~7 meters).

Installation

Pipe Size

Capacity

(Btu/h)

Suction

Evap

Max.

length

A

m(ft)

Additional

Refrigerant

g/m(oz/ft)

Max.

Elevation

B m(ft)

Standard

Length

m(ft)

9k, 12k

Ø12.7mm(1/2") Ø6.35mm(1/4")

7.5(25) 7.5(25) 15(49) 20(0.22)

Service Manual 17

Installation

Preparing Work for Installation

Open panel front

1. Pull the upper part of the front panel.

2. Lift up the panel.

3. To detach the front panel, remove the two screws at the lower part.

4. Detach the front panel from the body.

5. To detach the panel, disconnect the connector at the upper part.

Cover pipe and cover side remove

1. Please remove the screw of the center tuning cover.

2. Pull up the side cover of desired connecting direction, then

cover side is separated.

3. Pick the pipe hole of the side cover.

CAUTION: After removing the pipe hole, cut

the burr for safety.

When making pipe path through rear

wall, you don’t need to pick the pipe hole.

NOTICE

Drain hose junction

1. Remove the rubber stopple in the desired drain direc-

tion.

2. Insert drain hose into the handle of drain pan, and

join drain hose and connecting hose according to the

figure by.

Panel Front

Connector

Side cover

Pipe hole

Only the

desired direction

rubber cap

Only the

desired direction

Connecting

part

Adhesive

Drain

hose

18 Room Air Conditioner

Installation

Fixing Indoor Unit

• Drill the piping hole with a ø50mm hole core drill.

Drill the piping hole at either the right or the left with

the hole slightly slanted to the outdoor side.

Drill a Hole in the Wall

5-7mm

(0.2~0.3")

Indoor

WALL

Outdoor

Plastic anchors

INSTALLATION GUIDE MAP

10mm

INSTALLATION GU

INS

TAIIATION

G

UID

E M

AP

Plastic anchors

INSTALLATION GUIDE MAP

Hanger hole

(Rear side of

the product)

3. Make a hole with a diameter of 6mm and

depth of 30-35mm by piercing a screw

point.

5. Drive the fore plastic anchors into drilled

points.

7. Hang the hole of product at the upper

screws, and remove the map. (Falling

attention)

9. Check the fixed product with light power.

1. Attach an Installation guide map on the

desired surface.

2. Look at suited horizon by horizontal

meter on the horizontal setting line, and

fix lightly the map by adhesive tape.

4.

Drill the pierted part as a diameter of 50mm

for connecting piping. (In case of piercing

rear surface)

6.

First, Drive the two points of the upper

parts by screws. (Leave 10mm for hanging

the product)

8. Drive the lower parts after facing the hole

of product with plastic anchors, and fix

completely the upper screws.

10.

In case of nothing wrong, connect the

pipe and the wire. (Refer to installation

manual)

Horizontality

I

N

S

T

A

L

A

T

IO

N

G

U

ID

E

M

A

P

Service Manual 19

Flaring work and connection of piping

Flaring Work

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

Cutting the pipes and the cable.

1. Use the piping kit accessory or the pipes purchased

locally.

2. Measure the distance between the indoor and the

outdoor unit.

3. Cut the pipes a little longer than measured distance.

4. Cut the cable 4.9ft(1.5m) longer than the pipe length.

Removing burrs

1. Completely remove all burrs from the cut cross section

of pipe/tube.

2. Put the end of the copper tube/pipe in a downward

direction as you remove burrs in order to avoid dropping

burrs into the tubing.

Putting nut on

• Remove flare nuts attached to indoor and outdoor unit,

then put them on pipe/tube having completed burr

removal.

(not possible to put them on after flaring work)

Flaring work

1. Firmly hold copper pipe in a die in the dimension shown

in the table below.

2. Carry out flaring work with the flaring tool.

Copper

pipe

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

mm inch mm

Ø6.35 1/4 1.1~1.3

Ø9.52 3/8 1.5~1.7

Ø12.7 1/2 1.6~1.8

Ø15.88 5/8 1.6~1.8

Ø19.05 3/4 1.9~2.1

Outside diameter A

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

20 Room Air Conditioner

Flaring work and connection of piping

Check

1. Compare the flared work with the figure by.

2. If a flared section is defective, cut it off and do flaring

work again.

Indoor

Preparing the indoor unit's piping and drain hose for installation through the wall.

CAUTION: If the drain hose is routed inside the room, insulate the hose with an

insulation material* so that dripping from "sweating"(condensation) will not dam-

age furniture or floors.

*Foamed polyethylene or equivalent is recommended.

1. Route the indoor tubing and the drain hose in the

direction of rear left or right

2. Tape the tubing, drain hose and the connecting cable.

Be sure that the drain hose is located at the lowest

side of the bundle. Locating at the upper side can

cause drain pan to overflow inside the unit.

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Connecting the Piping

Drain hose

Connecting

cable

Gas side piping

Liquid side piping

Drain hose

Loop

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LG LA120HPI User manual

LG LA120HPI User manual

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