LG UV42R INSTALLATION INSTRUCTIONS

ENGLISH

ITALIANO

ESPAÑOL

INSTALLATION MANUAL

AIR
CONDITIONER

Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring standards by
authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.

Ceiling Suspended Air Conditioner
Original instruction (R32)

[Representative]

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

LG Electronics Inc. EU Representative :
LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands

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

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

P/NO.:MFL70520304

REV.00_190904

www.lg.com

Copyright © 2018 - 2019 LG Electronics Inc. All Rights Reserved.

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

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 fur­ther precautions are required.

Factor that influence the actual level of expo­sure of the workforce include the characteris­tics 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 evalu­ation of the hazard and risk.

Airborne Noise Emission

SQSM N B 015

Serial number

Chassis name

Indoor Unit / Outdoor Units

N : Indoor Unit
U : Outdoor Unit

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

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

Connectable Outdoor unit type

M : Indoor units only for

Multi systems

U : Indoor units only for

Single A systems

C : Common Indoor Unit for

Multi and Single CAC

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 condition­er 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 flamma­ble refrigerant (R32)

This symbol indicates that the Opera­tion 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 re­fabricated.

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

Right side cover

Air filters
(behind inlet grille)

Air inlet vent
(inlet grille)

Louver

Figure FigureName

Screw driver

Air outlet vent

Left side cover

Name

Multi-meter

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Hexagonal wrench

Ammeter

Gas-leak detector

Thermometer,

Level

Flaring tool set

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.

Unit: mm(inch)

10 (13/32)
or more

300 (11 – 13/16)
or more

2500 (98 – 3/7)
or more

Floor

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

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 (m2)

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

• 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 ceil­ing.

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 effi­ciency 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 pow­der is generated.

3. Avoid places where inflammable gas is
generated.

4. Avoid place where noxious gas is gen­erated.

5. Avoid places near high frequency gen­erators.

Air conditioner

Take enough
distance

Cooking table

Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.

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 side­cover 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 Sus­pension bolts and the piping hole.

- Drill the hole for anchor nut on the ceiling.

- Insert the nuts and washer onto the suspen­sion bolts for locking the suspension bolts on
the ceiling.

- Mount the suspension bolts to the anchor­nuts firmly.

- Secure the hangers onto the Suspension
bolts (adjust level roughly.) using nuts, wash­ers 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)

Washer

Suspension

bolts

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

!

Anchor nut

Ceiling

Nut

Suspension

Suspension

bolts

bolts

Washer

Washer

A

Suspension bolt

B

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

Suspension

Spring

washer

Hangen

Max.

12mm

bolts

Nut

Washer

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 connect­ing 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

Heat insulation material: Polyethylene foam
with thickness more than 8 mm.

Do not raise

Water
leakage

Tip of drain
hose dipped
in water

Water
leakage

Water
leakage

Ditch

Accumulated
drain water

Air

Waving

Less than
50 mm gap

Downward
slope

THE INDOOR UNIT INSTALLATION

19

ENGLISH

Heat insulation

Use the heat insulation material for the refrig­erant piping which has an excellent heat-resis­tance (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 tempera­ture: more than 23 °C), water drops are liable
to fall. In this case, add heat insulation materi­al according to the following procedure:

- Heat insulation material to be prepared...
Adiabatic glass wool with thickness 10 to 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.

Cut the pipes and the cable

Burrs removal

Pipe

Reamer

Point down

Control box cover

Fastening band

Refrigerant piping

Indoor unit

Thermal insulator

Copper

pipe

90°

Slanted Uneven Rough

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

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.

!

CAUTION

Copper in contact with refrigerants shall
be oxygen-free or de-oxidized, for exam­ple Cu-DHP as specified in EN 12735-1
and EN 12735-2

!

Flare nut

Copper tube

Bar

"A"

Copper pipe

Bar

Clamp handle

Handle

Yoke

Cone

Red arrow mark

Smooth all round

Even length

all round

Inside is shiny without scratches

= Improper flaring =

Surface

damaged

Cracked Uneven

Inclined

thickness

Indoor unit tubing Flare nut Pipes

Open-end wrench
(fixed)

Flare nut

Wrench

Indoor unit tubing

Connection
pipe

THE INDOOR UNIT INSTALLATION

21

ENGLISH

3 When needed to extend the drain hose of

indoor unit, assembly the drain pipe as
shown on the drawing

1 Overlap the connection pipe insulation

material and the indoor unit pipe insulation
material. Bind them together with vinyl
tape so that there may be no gap.

2 Set the tubing cutting line upward.

Wrap the area which accommodates the
rear piping housing section with vinyl tape.

3 Bundle the piping and drain hose together

by wrapping them with vinyl tape sufficient
enough to cover where they fit into the
rear piping housing section.

Wrap the insulation material
around the connecting portion.

Gas Pipe

Liquid Pipe

Cutting Line

Cutting Line

Good Case Bad Case

* Tubing cutting line have to be upward.

Vinyl tape(narrow)

Connection pipe

Connecting cable

Vinyl tape (wide)

Wrap with vinyl tape

Indoor unit pipe

Pipe

CAUTION

• When mechanical connectors are
reused indoors, sealing parts shall be
renewed.

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

!

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Insulation material

Wrap with vinyl tape

Pipe

Drain hose

Vinyl tape(wide)

22

ENGLISH

THE INDOOR UNIT INSTALLATION

- For wiring, use the designated power wire 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.

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 wiring which is the same
thickness, do as shown in the figure below.

Use round pressure terminals for connections
to the power terminal block.

Round pressure terminal

Power wire

CAUTION

The connecting cable connected to the
indoor and outdoor unit should be com­plied with the following specifications
(Rubber insulation, type H05RN-F
approved by HAR or SAA).

If the supply cord is damaged, it must be
replaced by a special cord or assembly
available from the manufacturer of its
service agent. When the connection line
between the indoor unit and outdooor
unit and outdoor unit is over 40 m, con­nect the telecommunication line and
power line separately.

!

20 mm

GN/YL

NORMAL
CROSS-SECTIONAL
AREA 0.75 mm

2

Precautions when laying power wiring

Wiring Connection

23

ENGLISH

TEST RUNNING

PRECAUTIONS IN TEST RUNNING

- The initial power supply must provide at least
90% of the rated voltage.
Otherwise, the air conditioner should not be
operated.

Check the following items when
installation is complete

After completing work, be sure to measure and
record trial run properties, and store measured
data, etc.
Measuring items are room temperature, outside
temperature, suction temperature, blow out
temperature, wind velocity, wind volume, volt­age, current, presence of abnormal vibration and
noise, operating pressure, piping temperature,
compressive pressure.
As to the structure and appearance, check fol­lowing items.

- Is the circulation of air adequate?

- Is the draining smooth?

- Is the heat insulation complete
(refrigerant and drain piping)?

- Is there any leakage of refrigerant?

- Is the remote controller switch operated?

- Is there any faulty wiring?

- Are not terminal screws loosened?

M4......118 N.cm{12 kgf.cm}

M5......196 N.cm{20 kgf.cm}

M6......245 N.cm{25 kgf.cm}

M8......588 N.cm{60 kgf.cm}

Connection of power supply

Connect the power supply cord to the independ­ent power supply.

- Circuit breaker is required.
Operate the unit for fifteen minutes or more.

Evaluation of the performance

Measure the temperature of the intake and dis­charge air.
Ensure the difference between the intake tem­perature and the discharge one is more than 8°C
(Cooling) or reversely (Heating).

- To cancel the test run, press any button.

TEST RUNNING

CAUTION

• For test run, carry out the cooling opera­tion firstly even during heating season.
If heating operation is carried out firstly,
it leads to the trouble of compressor.
Then attention must be paid.

• Carry out the test run more than 5 min­utes without fail.

!

Thermometer

24

ENGLISH

TEST RUNNING

CAUTION

After the confirmation of the above condi­tions, prepare the wiring as follows:

• Never fail to have an individual power
specialized for the air conditioner. As for
the method of wiring, be guided by the
circuit diagram pasted on the inside of
control box cover.

• Provide a circuit breaker switch
between power source and the unit.

• The screw which fasten the wiring in
the casing of electrical fittings are liable
to come loose from vibrations to which
the unit is subjected during the course
of transportation. Check them and make
sure that they are all tightly fastened. (If
they are loose, it could give rise to
burnout of the wires.)

• Specification of power source.

• Confirm that electrical capacity is suffi­cient.

• Be sure that the starting voltage is main­tained at more than 90 percent of the
rated voltage marked on the name plate.

• Confirm that the cable thickness is as
specified in the power sources specifi­cation. (Particularly note the relation
between cable length and thickness.)

• Never fail to equip a leakage breaker
where it is wet or moist.

• The following troubles would be caused
by voltage drop-down.

- Vibration of a magnetic switch, damage

on the contact point there of, fuse
breaking, disturbance to the normal
function of a overload protection
device.

- Proper starting power is not given to

the compressor.

• Use only 1 remote-controller contained
in indoor unit, when you combine to use
both cassette type indoor unit and dif­ferent Indoor units combinations as
shown below.

!

HAND OVER

Teach the customer the operation and mainte­nance procedures, using the operation manual
(air filter cleaning, temperature control, etc.).

25

ENGLISH

INSTALLATION INSTRUCTIONS

CAUTION

Installer setting mode is to set the detail function of the remote controller.
If the installer setting mode is not set correctly, it can cause problems to the product, user

injury or property damage. This must be set by an certificated installer, and any installation or
change that is carried out by a non-certificated person should be responsible for the results.

In this case, free service cannot be provided.

!

Refer to the Installer Setting Code Table
on the next page.

1. With the JET MODE button pressed, press
the RESET button.

2. By using the TEMPERATURE SETTING but­ton, set function code and setting value.
(Please refer the Installer Setting Code Table.)

3. Press the ON/OFF button toward the indoor
unit 1 time.

4. Reset the remote controller to use the general
operation mode.

INSTALLATION INSTRUCTIONS

Installer Setting - How to enter installer setting mode

TIME (3 s)

°C/°F (5 s)

26

ENGLISH

INSTALLATION INSTRUCTIONS

Installer Setting - Installer Setting Code Table

Installer Setting Code Table

No. Function Function code Setting value Remote controller LCD

0 Mode override

0

0 : Set to master

1 : Set to slave

1

Ceiling height

Selection

1

1 : Standard

2 : Low

3 : High

4 : Super high

2

Group control

2

0 : Set to master

1 : Set to slave

2 : Check master/slave

Auxiliary heater

2

3 : Set to auxiliary heater

4 : Cancel auxiliary heater

5 :

Check auxiliary heater Installation

Mode Override
This Function is only for Non-Auto Changeover H/P model.

Ceiling Height Selection
Indoor unit connected to wired remote controller operate as wired remote controller setting.

Auxiliary heater
This function is only applied to models with Auxiliary Heater function being activated.

Group Control (optional)
This function is only for group control. Please don’t set this function in case of non-group con-

trol.
After setting group control of the product, turn off the power then turn it back on after 1

minute.

27

ENGLISH

INSTALLATION INSTRUCTIONS

Installer Setting - Checking Address of Central Control

1. With the FUNC. button pressed, press the RESET button.

2. Press the ON/OFF button toward the indoor unit 1 time, and the indoor unit will display the set
address in the display window.

• The address display time and method can differ by the indoor unit type.

3. Reset the remote controller to use the general operation mode.

1. With the MODE button pressed, press the
RESET button.

2. By using the temperature setting button, set
the indoor unit address.

• Setting range : 00 ~ FF

3. After setting the address, press the ON/OFF
button toward the indoor unit 1 time.

4. The indoor unit will display the set address to
complete the address setting.

• The address display time and method can

differ by the indoor uint type.

5. Reset the remote controller to use the general
operation mode.

Installer Setting - Setting Address of Central Control

°C/°F (5 s)

TIME (3 s)

28

ENGLISH

MANUALE D’INSTALLAZIONE

CONDIZIONATORE
D'ARIA

Prima di installare il prodotto, leggere completamente questo manuale di installazione.
L'installazione deve essere eseguita in conformità con le norme nazionali per le connessioni
solo da parte di personale autorizzato.
Dopo avere letto il manuale di installazione conservarlo in un luogo sicuro per usarlo in
futuro.

Condizionatore a soffitto

Traduzione delle istruzioni originali (R32)

www.lg.com

Copyright © 2017 - 2018 LG Electronics Inc. All Rights Reserved.

ITALIANO

2

DESIGNAZIONE MODELLO

ITALIANO

DESIGNAZIONE MODELLO

- Nome prodotto : condizionatore d'aria

- Nome modello :

- Informazioni aggiuntive : il numero di serie si
riferisce al codice a barre presente sul pro­dotto

- Pressione max consentita lato Alto : 4,2 MPa
/ Lato basso : 2,4 MPa

- Refrigerante : R32

Informazioni prodotto

La pressione sonora ponderata emessa da que­sto prodotto è inferiore a 70 dB.

** Il livello di rumore può variare a seconda del
sito.

Le cifre riportate sono livelli di emissione e non
sono necessariamente i livelli di sicurezza di la­voro.

Mentre vi è una correlazione tra i livelli di emis­sione e di esposizione, questo non può essere
utilizzato in modo affidabile per determinare se
sono necessarie ulteriori precauzioni.

I fattori che influenzano il livello effettivo di espo­sizione del personale comprendono le caratteri­stiche della camera di lavoro e le altre fonti di
rumore, cioè il numero di apparecchiature e altri
processi adiacenti e il periodo di tempo in cui un
operatore è esposto al rumore. Inoltre, il livello di
esposizione consentito può variare da paese a
paese.

Tuttavia queste informazioni permetteranno al­l'utente dell'apparecchiatura di effettuare una mi­gliore valutazione del pericolo e del rischio.

Emissione rumore aereo

SQSM N B 015

Numero di serie

Nome della struttura

Unità interna / Unità esterne

N : Unità interna
U : Unità esterna

Tipo di prodotto dettagliato
esclusivamente per modelli serie M

AQ : Montaggio a parete Libero-R
SQ : Montaggio a parete Libero-E
AH* : Raffreddamento artific.
AW* : Specchio per Raffreddamento artific.
AH : Cassetta per soffitto
AHL : Condotto per soffitto a scomparsa
(Bassa statica)

Tipo di prodotto dettagliato per
modelli serie U- / C

L : Bassa statica
H : COP elevato
C : Econo
R : Refrigerante R32

Capacità nominale

Es) 7.000 Btu/h Classe → '07',

18.000 Btu/h Classe → '18'

Tipo prodotto

S : Montaggio a parete /
ARTCOOL mirror
J : Montaggio a parete
A : ARTCOOL
T : Cassetta per soffitto
B, M : Condotto per soffitto a scomparsa
V : Sospensione a soffitto e pavimento
Q : Consolle
P : Montaggio a pavimento

Tipo di unità esterna collegabile

M : Unità interne esclusivamente per

sistemi Multi

U : Unità interne esclusivamente per

sistemi A Single

C : Unità interne comuni per CAC

Multiplo e Singolo