LG UV42R.N20 Guida d'installazione

P/NO : MFL67107612

INSTALLATION MANUAL

AIR

CONDITIONER

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.

Ceiling Suspended Air Conditioner

Original instruction (R32)

[Representative]

LG Electronics Inc. EU Representative :

LG Electronics European Shared Service Center B.V.

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[Manufacturer] LG Electronics Tianjin Appliances Co.,Ltd.

No.09,Jinwei Road,Beichen District,Tianjin,China

ENGLISH

ITALIANO ESPAÑOL

FRANÇAIS DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

2

MODEL DESIGNATION

ENGLISH

MODEL DESIGNATION

- Product Name : Air conditioner

- Model Name :

- Additional Information : serial number is

refer to the barcode on the product.

- Max allowable pressure High side :

4.2 MPa / Low side : 2.4 MPa

- Refrigerant : R32

Product information

Serial number

Indoor Unit / Outdoor Units

Detailed product type only

for M- series models

AQ : Wall mounted Libero-R

SQ : Wall mounted Libero-E

AH* : ARTCOOL

AW* : ART COOL Mirror

AH : Ceiling Cassette

AHL : Ceiling Concealed Duct

(Low Static)

Detailed product type for

U- / C- series models

L : Low Static

H : High COP

C : Econo

R : Refrigerant R32

Nominal Capacity

Ex) 7,000 Btu/h Class → '07',

18,000 Btu/h Class → '18'

Product type

Connectable Outdoor unit type

Chassis name

SQSM N B 015

S : Wall mounted /

ARTCOOL mirror

J : Wall mounted

A : ARTCOOL

T : Ceiling Cassette

B, M : Ceiling Concealed Duct

V : Ceiling Suspended & ﬂoor

Q : Console

P : Floor Standing

M : Indoor units only for

Multi systems

U : Indoor units only for

Single A systems

C : Common Indoor Unit for

Multi and Single CAC

N : Indoor Unit

U : Outdoor Unit

The A-weighted sound pressure emitted by

this product is below 70 dB.

** The noise level can vary depending on the

site.

The figures quoted are emission level and are

not necessarily safe working levels.

Whilst there is a correlation between the

emission and exposure levels, this cannot be

used reliably to determine whether or not fur-

ther precautions are required.

Factor that influence the actual level of expo-

sure of the workforce include the characteris-

tics of the work room and the other sources

of noise, i.e. the number of equipment and

other adjacent processes and the length of

time for which an operator exposed to the

noise. Also, the permissible exposure level

can vary from country to country.

This information, however, will enable the

user of the equipment to make a better evalu-

ation of the hazard and risk.

Airborne Noise Emission

TIPS FOR SAVING ENERGY

3

ENGLISH

• 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 circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air condition-

er is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the

air flow or weaken the cooling / 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 :

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:

TIPS FOR SAVING ENERGY

4

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.

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 others.

• Installation MUST conform with local building codes or, in the

absence of local codes, with the Nation Electrical Code NFPA

70/ANSI C1-1003 or current edition and Canadian Electrical

Code Part1 CSA C.22.1.

• The information contained in the manual is intended for use by

a qualified service technician familiar with safety procedures

and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this

manual can result in equipment malfunction, property damage,

personal injury and/or death.

• Compliance with national gas regulations shall be observed.

!

Read the precautions in this manual

carefully before operating the unit.

This appliance is filled with flamma-

ble refrigerant (R32)

This symbol indicates that the Opera-

tion Manual should be read carefully.

This symbol indicates that a service

personnel should be handling this

equipment with reference to the

Installation Manual.

IMPORTANT SAFETY INSTRUCTIONS

5

ENGLISH

Installation

• Always perform grounding. - Otherwise, it may cause electrical

shock.

• Don’t use a power cord, a plug or a loose socket which is

damaged. - Otherwise, it may cause a fire or electrical shock.

• For installation of the product, always contact the service

center or a professional installation agency. - Otherwise, it may

cause a fire, electrical shock, explosion or injury.

• Securely attach the electrical part cover to the indoor unit and

the service panel to the outdoor unit.

- If the electrical part cover of the indoor unit and the service

panel of the outdoor unit are not attached securely, it could

result in a fire or electric shock due to dust, water, etc.

• Always install an air leakage breaker and a dedicated switching

board. - No installation may cause a fire and electrical shock.

• Do not keep or use flammable gases or combustibles near the

air conditioner. - Otherwise, it may cause a fire or the failure of

product.

• Ensure that an installation frame of the outdoor unit is not

damaged due to use for a long time.

- It may cause injury or an accident.

• Do not disassemble or repair the product randomly. - It will

cause a fire or electrical shock.

• Do not install the product at a place that there is concern of

falling down. - Otherwise, it may result in personal injury.

• Use caution when unpacking and installing. - Sharp edges may

cause injury.

• The appliance shall be stored in a room without continuously

operating ignition sources (for example: open flames, an

operating gas appliance or an operating electric heater.)

• Two or more people must lift and transport the product. Avoid

personal injury.

• Do not use means to accelerate the defrosting process or to

clean, other than those recommended by the manufacturer.

• Do not pierce or burn refrigerant cycle part.

• Be aware that refrigerants may not contain an odour.

6

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

• Keep any required ventilation openings clear of obstruction.

• The appliance shall be stored in a well-ventilated area where

the room size corresponds to the room area as specified for

operation.

• Refrigerant tubing shall be protected or enclosed to avoid

damage.

• Flexible refrigerant connectors (such as connecting lines

between the indoor and outdoor unit) that may be displaced

during normal operations shall be protected against mechanical

damage.

• A brazed, welded, or mechanical connection shall be made

before opening the valves to permit refrigerant to flow

between the refrigerating system parts.

• Mechanical connections shall be accessible for maintenance

purposes.

Operation

• Do not share the outlet with other appliances. - It will cause an

electric shock or a fire due to heat generation.

• Do not use the damaged power cord. - Otherwise, it may

cause a fire or electrical shock.

• Do not modify or extend the power cord randomly.

- Otherwise, it may cause a fire or electrical shock.

• Take care so that the power cord may not be pulled during

operation. - Otherwise, it may cause a fire or electrical shock.

• Unplug the unit if strange sounds, smell, or smoke comes

from it. - Otherwise, it may cause electrical shock or a fire.

• Keep the flames away. - Otherwise, it may cause a fire.

• Take the power plug out if necessary, holding the head of the

plug and do not touch it with wet hands. - Otherwise, it may

cause a fire or electrical shock.

• Do not use the power cord near the heating tools. - Otherwise,

it may cause a fire and electrical shock.

• Do not open the suction inlet of the indoor/outdoor unit during

operation. - Otherwise, it may electrical shock and failure.

IMPORTANT SAFETY INSTRUCTIONS

7

ENGLISH

• Do not allow water to run into electrical parts. - Otherwise, it

may cause the failure of machine or electrical shock.

• Hold the plug by the head when taking it out. - It may cause

electric shock and damage.

• Never touch the metal parts of the unit when removing the

filter. - They are sharp and may cause injury.

• Do not step on the indoor/outdoor unit and do not put anything

on it. - It may cause an injury through dropping of the unit or

falling down.

• Do not place a heavy object on the power cord. - Otherwise, it

may cause a fire or electrical shock.

• When the product is submerged into water, always contact the

service center. - Otherwise, it may cause a fire or electrical

shock.

• Take care so that children may not step on the outdoor unit.

- Otherwise, children may be seriously injured due to falling

down.

• Use a vacuum pump or inert (nitrogen) gas when doing

leakage test or air purge. Do not compress air or oxygen, and

do not use flammable gases. Otherwise, it may cause fire or

explosion. - There is the risk of death, injury, fire or explosion.

• Do not turn on the breaker or power under condition that front

panel, cabinet, top cover, control box cover are removed or

opened. - Otherwise, it may cause fire, electric shock,

explosion or death.

• Turn off all devices that cause fire when the refrigerant leaks.,

ventilate the room (example : opening window or using

ventilation unit), and contact with dealer who you purchased

the unit.

• The installation of pipe-work shall be kept to a minimum.

• When mechanical connectors are reused indoors, sealing parts

shall be renewed.

• When flared joints are reused indoors, the flare part shall be re-

fabricated.

8

IMPORTANT SAFETY INSTRUCTIONS

ENGLISH

CAUTION

Installation

• Install the drain hose to ensure that drain can be securely

done. - Otherwise, it may cause water leakage.

• Install the product so that the noise or hot wind from the

outdoor unit may not cause any damage to the neighbors.

- Otherwise, it may cause dispute with the neighbors.

• Always inspect gas leakage after the installation and repair of

product. - Otherwise, it may cause the failure of product.

• Keep level parallel in installing the product. - Otherwise, it may

cause vibration or water leakage.

• Any person who is involved with working on or breaking into a

refrigerant circuit should hold a current valid certificate from an

industry-accredited assessment authority, which authorises

their competence to handle refrigerants safely in accordance

with an industry recognised assessment specification.

• Wear adequate personal protection equipment (PPE) when

installing, maintaining or servicing the product.

Operation

• Avoid excessive cooling and perform ventilation sometimes.

- Otherwise, it may do harm to your health.

• Use a soft cloth to clean. Do not use wax, thinner, or a strong

detergent. - The appearance of the air conditioner may

deteriorate, change color, or develop surface flaws.

• Do not use an appliance for special purposes such as

preserving animals vegetables, precision machine, or art

articles.

- Otherwise, it may damage your properties.

• Do not place obstacles around the flow inlet or outlet.

- Otherwise, it may cause the failure of appliance or an

accident.

• The appliance shall be stored so as to prevent mechanical

damage from occurring.

!

IMPORTANT SAFETY INSTRUCTIONS

9

ENGLISH

• Servicing shall only be performed as recommended by the

equipment manufacturer. Maintenance and repair requiring the

assistance of other skilled personnel shall be carried out under

the supervision of the person competent in the use of

flammable refrigerants.

• Dismantling the unit, treatment of the refrigerant oil and

eventual parts should be done in accordance with local and

national standards.

• Periodic (more than once/year) cleaning of the dust or salt

particles stuck on the heat exchanger by using water.

• This equipment shall be provided with a supply conductor

complying with the national regulation.

• This appliance can be used by children aged from 8 years and

above and persons with reduced physical, sensory or mental

capabilities or lack of experience and knowledge if they have

been given supervision or instruction concerning use of the

appliance in a safe way and understand the hazards involved.

Children shall not play with the appliance. Cleaning and user

maintenance shall not be made by children without

supervision.

• This appliance is not intended for use by persons (including

children) with reduced physical, sensory or mental capabilities

or lack of experience and knowledge, unless they have been

given supervision or instruction concerning use of the

appliance by a person responsible for their safety. Children

should be supervised to ensure that they do not play with the

appliance.

10

TABLE OF CONTENTS

ENGLISH

2 MODEL DESIGNATION

3 TIPS FOR SAVING ENERGY

4 IMPORTANT SAFETY INSTRUCTIONS

11 PRODUCT PARTS

11 INSTALLATION TOOLS

12 INSTALLATION

12 Select the best Location

14 THE INDOOR UNIT INSTALLATION

15 Open side-cover

16 Mounting the anchor nut and bolt

18 Indoor unit drain piping

18 Drain piping

18 Drain test

19 Heat insulation

19 Flaring Work

22 Wiring Connection

23 TEST RUNNING

25 INSTALLATION INSTRUCTIONS

25 Installer Setting - How to enter installer setting mode

26 Installer Setting - Installer Setting Code Table

27 Installer Setting - Setting Address of Central Control

27 Installer Setting - Checking Address of Central Control

TABLE OF CONTENTS

PRODUCT PARTS

11

ENGLISH

PRODUCT PARTS

INSTALLATION TOOLS

Air outlet vent

Air inlet vent

(inlet grille)

Air ﬁlters

(behind inlet grille)

Louver

Right side cover

Left side cover

Figure FigureName

Screw driver

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Multi-meter

Hexagonal wrench

Ammeter

Gas-leak detector

Thermometer,

Level

Flaring tool set

Name

12

INSTALLATION

ENGLISH

INSTALLATION

Indoor unit

Ceiling suspended type

- There should not be any heat source or steam near the unit.

- There should not be any obstacles to prevent the air circulation.

- A place where air circulation in the room will be good.

- A place where drainage can be easily obtained.

- A place where noise prevention is taken into consideration.

- Do not install the unit near the door way.

- Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.

- The indoor unit must keep the maintenance space.

700(27 – 9/16) or more 700(27 – 9/16) or more

2500 (98 – 3/7)

or more

Floor

10 (13/32)

or more

300 (11 – 13/16)

or more

Unit: mm(inch)

INSTALLATION

13

ENGLISH

- The appliance shall be installed, operated and stored in a room with a floor area larger than the mini-

mum area.

- Use the graph of table to determine the minimum area.

- m : Total refrigerant amount in the system

- Total refrigerant amount : factory refrigerant charge + additional refrigerant amount

- Amin : minimum area for installation

Minimum ﬂoor area

0

100

200

300

400

500

600

Amin (m

2

)

m (kg)

0 1.224 2 3 4 5 6 7 8

Floor standing

Wall mounted

Ceiling mounted

Floor location

m (kg) Amin (m

2

)

4.6 181.56

4.8 197.70

5 214.51

5.2 232.02

5.4 250.21

5.6 269.09

5.8 288.65

6 308.90

6.2 329.84

6.4 351.46

6.6 373.77

6.8 396.76

7 420.45

7.2 444.81

7.4 469.87

7.6 495.61

7.8 522.04

Wall mounted

m (kg) Amin (m

2

)

4.6 20.17

4.8 21.97

5 23.83

5.2 25.78

5.4 27.80

5.6 29.90

5.8 32.07

6 34.32

6.2 36.65

6.4 39.05

6.6 41.53

6.8 44.08

7 46.72

7.2 49.42

7.4 52.21

7.6 55.07

7.8 58.00

Ceiling Mounted

m (kg) Amin (m

2

)

4.6 13.50

4.8 14.70

5 15.96

5.2 17.26

5.4 18.61

5.6 20.01

5.8 21.47

6 22.98

6.2 24.53

6.4 26.14

6.6 27.80

6.8 29.51

7 31.27

7.2 33.09

7.4 34.95

7.6 36.86

7.8 38.83

Floor location

m (kg) Amin (m

2

)

< 1.224 -

1.224 12.9

1.4 16.82

1.6 21.97

1.8 27.80

2 34.32

2.2 41.53

2.4 49.42

2.6 58.00

2.8 67.27

3 77.22

3.2 87.86

3.4 99.19

3.6 111.20

3.8 123.90

4 137.29

4.2 151.36

4.4 166.12

Wall mounted

m (kg) Amin (m

2

)

< 1.224 -

1.224 1.43

1.4 1.87

1.6 2.44

1.8 3.09

2 3.81

2.2 4.61

2.4 5.49

2.6 6.44

2.8 7.47

3 8.58

3.2 9.76

3.4 11.02

3.6 12.36

3.8 13.77

4 15.25

4.2 16.82

4.4 18.46

Ceiling Mounted

m (kg) Amin (m

2

)

< 1.224 -

1.224 0.956

1.4 1.25

1.6 1.63

1.8 2.07

2 2.55

2.2 3.09

2.4 3.68

2.6 4.31

2.8 5.00

3 5.74

3.2 6.54

3.4 7.38

3.6 8.27

3.8 9.22

4 10.21

4.2 11.26

4.4 12.36

14

THE INDOOR UNIT INSTALLATION

ENGLISH

THE INDOOR UNIT INSTALLATION

Use the ventilation fan

for smoke-collecting

hood with sufﬁcient

capacity.

Cooking table

Air conditioner

Take enough

distance

• Install the unit horizontally using a level

gauge.

• During the installation, care should be

taken not to damage electric wires.

• Select and mark the position for fixing

bolts and piping hole.

• Decide the position for fixing bolts

slightly tilted to the drain direction after

considering the direction of drain hose.

• Drill the hole for anchor bolt on the ceil-

ing.

CAUTION

!

NOTE

!

• Avoid the following installation location.

1. Such places as restaurants and kitchen

where considerable amount of oil

steam and flour is generated.

These may cause heat exchange effi-

ciency reduction, or water drops, drain

pump mal-function.

In these cases, take the following

actions;

• Make sure that ventilation fan is enough

to cover all noxious gases from this

place.

• Ensure enough distance from the cook-

ing room to install the air conditioner in

such a place where it may not suck oily

steam.

2. Avoid installng air conditioner in such

places where cooking oil or iron pow-

der is generated.

3. Avoid places where inflammable gas is

generated.

4. Avoid place where noxious gas is gen-

erated.

5. Avoid places near high frequency gen-

erators.

THE INDOOR UNIT INSTALLATION

15

ENGLISH

Open side-cover

Step 1

Backside

Right side cover

Backside

Left side

cover

Step 2

- Remove two screws from side-cover.

Step 3

Step 4

- Remove paper bracket from side-cover.

- Unlock side-cover from side-panel slightly

(Tap the side-cover with your palm on the

backside)

- Knock out the pipe hole from the left side-

cover with nipper/plier.

Hold the side-cover with other hand while

tapping to prevent it to fall down.

CAUTION

!

16

THE INDOOR UNIT INSTALLATION

ENGLISH

Mounting the anchor nut and

bolt

- Prepare 4 suspension bolts. (Each bolts

length should be same.)

- Measure and mark the position for the Sus-

pension bolts and the piping hole.

- Drill the hole for anchor nut on the ceiling.

- Insert the nuts and washer onto the suspen-

sion bolts for locking the suspension bolts on

the ceiling.

- Mount the suspension bolts to the anchor-

nuts firmly.

- Secure the hangers onto the Suspension

bolts (adjust level roughly.) using nuts, wash-

ers and spring washers.

- Adjust a level with a level gauge on the

direction of left-right, back-forth by adjusting

suspension bolts.

- Adjust a level on the direction of top-bottom

by adjusting supension bolts. Then the unit

will be declined to the bottomside so as to

drain well.

- The following parts is option.

Hanging Bolt - W 3/8 or M10

Nut - W 3/8 or M10

Spring Washer - M10

Plate Washer - M10

(Unit : mm)

Suspension bolt

B

A

Nut

Ceiling

Anchor nut

Washer

Suspension

bolts

Suspension

bolts

Spring

washer

Max.

12mm

Nut

Suspension

bolts

Hangen

Washer

Hanging bolt

(W3/8 or M10)

Nut

(W3/8 or M10)

Spring washer

(M10)

Flat washer

for M10

(accessory)

Flat washer

for M10

(accessory)

Nut

(W3/8 or M10)

Wall

Indoor

Outdoor

Slope gradient for

drain Should be

1/50 ~ 1/100

Model (kBtu/h) A B

18k/24k 1018

355

36k/42k/48k/60k 1418

Tighten the nut and bolt to prevent unit

from falling

• Drill the piping hole on the wall slightly

tilted to the outdoor side by using a

Ø 70 hole-core drill.

CAUTION

!

THE INDOOR UNIT INSTALLATION

17

ENGLISH

Installation information for declination

- Install declination of the indoor unit is very important for the drain of the convertible type air

conditioner.

- Minimum thickness of the insulation for the connecting pipe shall be 10 mm.

- If the Installation Plates are fixed to horizontal line, the indoor unit after installing will be

declined to the bottomside.

CAUTION

!

Front of view

- The unit must be horizontal or inclined at angle.

- The inclination should be less than or equal to 1° or in between 10 to 20 mm inclined in drain

direction as shown in fig.

Ceiling

10~20 mm

Side of view

- The unit must be inclined to the bottomside of the unit when finished installation.

Ceiling

5~10 mm

18

THE INDOOR UNIT INSTALLATION

ENGLISH

Indoor unit drain piping

- Drain piping must have down-slope (1/50 to

1/100): be sure not to provide up-and-down

slope to prevent reversal flow.

- During drain piping connection, be careful

not to exert extra force on the drain port on

the indoor unit.

- Remove the rubber stopple before connect-

ing drain hose.

- Hook on the bracket after connecting the

drain hose as below.

Drain piping

- The drain hose should point downward for

easy drain flow.

- Do not make drain piping like the following.

- Be sure to execute heat insulation on the

drain piping.

Drain test

Use the following procedure to test the drain

pump operation:

- Set the air direction louvers up-and-down to

the position(horizontally) by hand.

- Pour a glass of water on the evaporator

using a kettle.

- Ensure the water flows through the drain

hose of the indoor unit without any leakage

and goes out the drain exit.

Drain hose

Bracket

Downward

slope

Do not raise

Accumulated

drain water

Air

Waving

Water

leakage

Water

leakage

Ditch

Less than

50 mm gap

Water

leakage

Tip of drain

hose dipped

in water

Heat insulation material: Polyethylene foam

with thickness more than 8 mm.

THE INDOOR UNIT INSTALLATION

19

ENGLISH

Heat insulation

Use the heat insulation material for the refrig-

erant piping which has an excellent heat-resis-

tance (over 120 °C).

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 tempera-

ture: more than 23 °C), water drops are liable

to fall. In this case, add heat insulation materi-

al according to the following procedure:

- Heat insulation material to be prepared...

Adiabatic glass wool with thickness 10 to 20

mm.

- Stick glass wool on all air conditioners that

are located in ceiling atmosphere.

Connecting cables to the indoor unit

- Remove the control box cover for electrical

connection between the indoor and out door

unit

- Use the cord clamper to fix the cord.

Flaring Work

Main cause for gas leakage is due to defect of

flaring work. Carry out correct flaring work in

the following procedure.

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 1.5m longer than the pipe

length.

1. Completely remove all burrs from the cut

cross section of pipe/tube.

2. While removing burrs put the end of the

copper tube/pipe in a downward direction

while removing burrs location is also

changed in order to avoid dropping burrs

into the tubing.

Indoor unit

Thermal insulator

Fastening band

Refrigerant piping

Cut the pipes and the cable

Copper

pipe

90°

Slanted Uneven Rough

Burrs removal

Pipe

Reamer

Point down

Control box cover

20

THE INDOOR UNIT INSTALLATION

ENGLISH

- 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 finishing

flare work)

1 Firmly hold copper pipe in a bar with the

dimension shown in below table table

below.

2 Carry out flaring work with the flaring tool.

1

Compare the flared work with the figure by.

2 If a flared section is defective, cut it off

and do flaring work again.

1 Align the center of the pipes and sufficient-

ly tighten the flare nut by hand

2 Tighten the flare nut with a wrench

Putting nut on

Flare nut

Copper tube

Flaring work

Outside diameter Temper grade A

mm inch Annealed(o) mm

Ø6.35 1/4 Annealed(o) 1.1~1.3

Ø9.52 3/8 Annealed(o) 1.5~1.7

Ø12.7 1/2 Annealed(o) 1.6~1.8

Ø15.88 5/8 Annealed(o) 1.6~1.8

Check

Connecting the installation pipe

and drain hose to the indoor unit.

Outside diameter Torque

mm inch kgf

.

m

Ø6.35 1/4 1.8~2.5

Ø9.52 3/8 3.4~4.2

Ø12.7 1/2 5.5~6.5

Ø15.88 5/8 6.3~8.2

CAUTION

• The installation of pipe-work shall be

kept to a minimum

• Flared joint shall be restricted to use

with annealed pipe only, and to pipe

sizes not exceeding a diameter of 20

mm outside diameter.

!

Wrench

Indoor unit tubing

Open-end wrench

(ﬁxed)

Connection

pipe

Flare nut

CAUTION

Copper in contact with refrigerants shall

be oxygen-free or de-oxidized, for exam-

ple Cu-DHP as specified in EN 12735-1

and EN 12735-2

!

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper ﬂaring =

Indoor unit tubing Flare nut Pipes

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LG UV42R.N20 Guida d'installazione

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