LG MULTI V TJ Series User manual

System
Indoor Unit
INSTALLATION MANUAL
LG
MODELS: TJ Series
Type: Ceiling Mounted Cassette - 1Way
IMPORTANT
• 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.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

2Indoor Unit
Ceiling Mounted Cassette - 1Way Type Indoor Unit Installation Manual
TABLE OF CONTENTS
❏ Installation guide map
❏Four type "A" screws & plastic
anchors
❏Connecting cable
❏Pipes: Gas side
Liquid side
(Refer to Product Data)
❏Insulation materials
❏Additional drain pipe
❏Level gauge
❏Screw driver
❏Electric drill
❏Hole core drill
❏Horizontal meter
❏Flaring tool set
❏Specified torque wrenches
(different depending on model No.)
❏Spanner.......Half union
❏Hexagonal wrench
❏Gas-leak detector
❏Vacuum pump
❏Gauge manifold
❏Owner's manual
❏Thermometer
Installation Parts ....................3
Safety Precautions.................4
Installation
Selection of the best location7
Ceiling dimension and hang-
ing bolt location......................8
Wiring Connection.................9
Installation of Decoration
Panel ....................................10
Drain Piping .........................11
Installation of Remote
Control..................................13
Optional Operation..............14
Installation Requirements Required Parts Required Tools

Installation Manual 3
Installation Parts
ENGLISH
Anti-bacteria filter
Air Intake
Air Outlet
Installation Parts
Name
Quantity
Shape for gas pipe
for liquid pipe
Clamp metal
2 EA
Insulation for
fitting
1 SET
Drain hose
1 EA
Plastic band
8 EA
Washer for
hanging backet
4 EA
(Other)
• Paper pattern for
installation
• Owner's manual
• Installation manual

4Indoor Unit
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■Be sure to read before installing the air conditioner.
■Be sure to observe the cautions specified here as they include important items related to safety.
■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 a defective or under-
rated circuit breaker. Use this
appliance on a dedicated circuit.
• There is risk of fire or electric shock.
For electrical work, contact the
dealer, seller, a qualified electri-
cian, or an Authorized Service
Center.
• Do not disassemble or repair the
product. There is risk of fire or elec-
tric shock.
Always ground the product.
• There is risk of fire or electric shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric shock.
Always install a dedicated cir-
cuit and breaker.
• Improper wiring or installation may
cause fire or electric shock.
Use the correctly rated breaker
or fuse.
• There is risk of fire or electric shock.

Installation Manual 5
Safety Precautions
ENGLISH
■Operation
Do not modify or extend the
power cable.
• There is risk of fire or electric shock.
Do not let the air conditioner
run for a long time when the
humidity is very high and a door
or a window is left open.
• Moisture may condense and wet or
damage furniture.
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 condenser 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 prop-
erty damage, product failure, and
personal injury.
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
Gasolin

6Indoor Unit
Safety Precautions
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.
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 product.
• 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 product.
Corrosion, particularly on the con-
denser and evaporator fins, could
cause product malfunction or inefficient
operation.
90˚
■Installation

Installation Manual 7
Installation
ENGLISH
•There should not be any heat source or steam near the unit.
•There should not be any obstacles to 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 have the maintenance space.
Read completely, then follow step by step.
Unit:cm
Ceiling
Ceiling Board
Ceiling Board
20 or more
Above 250 330 or less
100 or more
50 or
more
50 or
more
30 or less
Floor
Installation
Selection of the best location
CAUTION : In case that the unit is installed near the sea, the installation parts
may be corroded by salt. The installation parts (and the unit) should be taken
appropriate anti-corrosion measures.

8Indoor Unit
Installation
Ceiling dimension and hanging bolt location
Level gauge
Ceiling
Ceiling board
1,028 (Ceiling opening)
923 (Hanging bolt)
344(Hanging bolt)
860
55 50
410 5353
450 (Ceiling opening)
(unit: mm)
•The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.
•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 cooking 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.
NOTICE
CAUTION :
•This air-conditioner uses a drain
pump.
•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 wall.
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance

Installation Manual 9
Installation
ENGLISH
Set screw of
paper model (4 pieces)
Paper model
for installation
Ceiling board
70mm
Adjust the same height
Ceiling board
Ceiling
Flat washer for M10
(accessory)
Keep the length of the bolt
from the bracket to 40mm
Open the ceiling board
along the outer edge of the
paper model
Flat washer for M10
(accessory)
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Spring washer
(M10)
Air Conditioner body
•The following parts are local purchasing.
Hanging Bolt - W 3/8 or M10
Nut - W 3/8 or M10
Spring Washer - M10
Plate Washer - M10
Terminal Block Indoor
1(L) 2(N) 3 4
INDOOR POWER INPUT
Indoor
unit Outdoor unit Central
controller
AB E F C D Vcc GND
Main
outdoor unit
Connect the wires to the terminals on the control board individually according to the outdoor unit connection.
•Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.
Wiring Connection
WARNING : Make sure that the screws of the terminal are free from looseness.
CAUTION : Tighten the nut and bolt to
prevent unit from falling off.

10 Indoor Unit
Installation
1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10mm in length.)
The fixing screws (hexagon M5 screw) are included the indoor unit box.
2. Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)
3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide the panel so
that the screws reach the key hole edge.
4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)
5. Connect the louver motor connector and display connector.
6. After tightening these screws, install the air inlet grille (including the air filter).
Piping side
Decorative panel
fixing screws
(Hexagon M6 screw)
Air conditioner unit
Decorative panel Push
Decorative panel
fixing screws
(hexagon M6 screws)
Temporarily fitting
at 2 poles
(Tightening about 10mm)
Inlet GrilleInlet GrilleInlet Grille
Key holes
Louver motor
Control box cover
Cover
Ratch
pull
Plasma filter
The decoration panel has its installation
direction. Before installing the decoration panel,
always remove the paper template.
Cool air leakage
(no good)
Decorative panel
Air conditioner
unit
Ceiling
board
Fit the insulator (this part) and
be careful for cool air leakage
Decorative panel
Air conditioner
unit
Ceiling
board
Good example Bad example
Installation of Decoration Panel
CAUTION : Install
certainly the deco-
ration panel.
Cool air leakage
causes sweating.
Water drops fall.

Installation Manual 11
Installation
ENGLISH
•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.
•The outside diameter of the drain connection on the indoor unit is
32mm.
•
Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
•Connect the main drain pipe to the exterior
and leave it provisionally until the test
comes to an end.
•Feed water to the flexible drain hose and
check the piping for leakage.
•Be sure to check the drain pump for normal
operating and noise when electrical wiring
is complete.
•When the test is complete, connect the flex-
ible drain hose to the drain port on the
indoor unit.
Heat insulation material: Polyethylene foam with thick-
ness more than 8 mm.
Drain test
Flexible drain hose
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
1/50~1/100
MAX 700mm
Feed water
Drain Pump
Drain pan
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip (accessory)
Flexible drain hose
1/50~1/100
MAX 700mm
Flexible drain hoseFlexible drain hoseFlexible drain hose
Drain Piping
CAUTION : The supplied flexible drain
hose should not be curved, neither
screwed. The curved or screwed hose
may cause a leakage of water.

12 Indoor Unit
Installation
CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of
wiring, be guided by the circuit diagram posted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screws 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 burn-out
of the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage
marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
•Vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the nor-
mal function of an overload protection device.
•Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)

ENGLISH
Installation Manual 13
Installation
Remote controller
box body
Cord clamp
(accessory)
Lever carefully
the box open
using a screw
driver, etc.
Front case
The lower part
Face of wall
Under plate
Screw (accessory)
•Separate the under plate from Remote
controller box. •Attach insulator to under plate.
•Fix the under plate on the wall •
Fix the cord clamps on the wall by ø3 tapping screws (accessory).
• Fix the remote controller cord.
WIRED REMOTE CONTROLLER INSTALLATION
DISASSEMBLING
ELECTRICAL WIRING
Wire and make sure that teminal
numbers are matched on unit side and
remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m,
use a wire size greater than 0.5mm2.
Remote controller
(Main board)
CN REMO
•Although the room thmperature sensor is in the indoor unit, the remote controller should be installed in such
places away from direct sunlight and high humidity.
Installation of the remote controller
•Select places that are not splashed with water.
•Select controller position after receiving customer approval.
•The room temperature sensor is built in the indoor unit.
•This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult
to see.(The standard height is 1.2 ~1.5m high)
Routing of the remote controller cord
•Keep the remote controller cord away from the refrigerant piping and the drain piping.
•To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
cables. (audio equipment. television set, etc.)
•If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water
droplets from running.
Installation of Remote Control

14 Indoor Unit
Installation
You can choose the RPM(or air volume) of indoor
motor according to the height of ceiling to supply the
comfortable atmosphere to consumers.
Procedure
1. Choose the selectable position in the table after
measuring the height of ceiling.
2. In the case of changing the height as "high" or "low",
open the rear cover of the wired remote-controller.
3. Move the slide switch to the set position.
4. Close the rear cover and check if it works nomally.
2) Adjusting air volume to the height of ceiling
TH
R14H
SW TH
REMO
MAIN
2TH OP7
R18H
R17H
OP6
LO
STAND
SW HIGH
HI R03S
C070 R04S R02S
R01S
OP3 OP2 OP1
R19HR11H
R13H R12H OP5R16H OP4
R15H
CO1H
Lo
Hi
STAND
Slide switch for ceiling height
Slide switch for 2 Thermistor
Standard
(Default)
Low ceiling
High Ceiling
Ceiling height Mode of slide switch Change of air volume Remark
more than 4.0m High Ceiling Increasing
3.2~4.0m Standard -
less than 3.2m Low Ceiling Decreasing
Maunfactured in stan-
dard mode
1) Two Thermistor System
(1) Open the rear cover of the wired remote-controller to
set the mode.
(2) Select one of three selectable modes as follows.
•Position 1:
The room temperature is controlled by the thermistor
of the main body.
•Position 2:
The room themperature is controlled by the thermis-
tor of the wired remote-controller, control the temper-
ature according to the position of wired remote-con-
troller.
•Position 3:
The room temperature is controlled by lower temper-
ature between the temperature of main body and of
remote-controller sensor.
(3) Move the slide switch to set position.
(4) Close the rear cover and check if it works normally.
TH
R14H
SW TH
REMO
MAIN
2TH OP7
R18H
R17H
OP6
LO
STAND
SW HIGH
HI R03S
C070 R04S R02S
R01S
OP3 OP2 OP1
R19HR11H
R13H R12H OP5R16H OP4
R15H
CO1H
REMO
Room Temp. sensor
2TH
MAIN
Position 2
Position 1
Position 3
Slide switch for ceiling height
Slide switch for 2 Thermistor
Optional operation
CAUTION :
•Select the position after counselling with a customer.
In case of cooling mode, room temperature is controlled by the main body sensor.
•To control the room temperature by a wired remote controller, install the remote
controller (room temp. sensor) to sense the temperature more accurately.
•Maunfactured in the position 3.

P/No.: 3828A20873C Printed in Korea
After reading this manual, keep it in a place easily accessible to the user for future reference.