LG ARTCOOL LA121CNM User manual

ENGLISH
LG
Room Air Conditioner
INSTALLATION MANUAL
LG
http://www.lgservice.com
IMPORTANT
• Please read this instruction manual completely before
installing the product.
• When the power cord is damaged, replacement should be
performed by authorized personnel only.
• 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.
FRANÇAIS ESPAÑOL

2Room Air Conditioner
Room Air Conditioner Installation Manual
TABLE OF CONTENTS
Safety Precautions.........................3
Introduction .....................................9
Symbols Ued in This Manual......9
Features.......................................9
Installation .....................................10
Installation Parts........................10
Installation Tools ........................10
Installation Map..........................11
Confirm The Refrigerant ...........12
Select The Best Location .........13
Piping Length And Elevation.....14
How To Mount Installation Plate ..15
Drill a Hole In The Wall..............15
Flaring Work...............................16
Connecting The Piping..............17
Connection Of The Drain Hose
...22
Connection Of Piping -Outdoor
...22
Connection Of The Cable.........23
Checking The Drainage ............25
Forming The Piping...................26
Air Purging.................................27
Air Purging With Vacuum Pump
..27
Charging.....................................29
Test Running.................................30
❏ Installation plate
❏Four type "A" screws
❏Connecting cable
❏Pipes: Suction line
Evaporator line
(Refer to page 13)
❏Insulation materials
❏Additional drain pipe
(
Outer Diameter .........15.5mm(0.61in))
❏Two type "B" screws
Installation
Requirements Required Parts Required Tools
❏Level gauge
❏Screwdriver
❏Electric drill
❏Hole core drill(ø70mm(2.76in))
❏Flaring tool set
❏Specified torque wrenches
4.2kg.m, 6.6kg.m
(different depending on model No.)
(Refer to page 17)
❏Spanner.....................Half union
❏A glass of water
❏Screw driver
❏Hexagonal
wrench(4mm(0.16in))
❏Gas Leak Detector
❏Vacuum pump
❏Manifold Gauge
❏Owner's manual
❏Thermometer
❏Remote Control Holder

Installation Manual 3
ENGLISH
Safety Precautions
To prevent the injury of 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.
■The meanings of the 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.
■Installation
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
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
electrician, 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
(customer).
• There is risk of fire, electric shock,
explosion or injury.

4Room Air Conditioner
Safety Precautions
■Operation
Be cautious when unpacking and
installing the product.
• Shape edges could cause injury. Be
especially careful of the sharp edges.
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
conditioner could fall with it, causing
property damage, product failure, and
personal injury.
Install the indoor unit on the wall
where the height from the floors
more then 8ft(2.4m)
• There are sharp moving parts that
could cause personal injury.
Do not handle the pipe by
yourself(customer)
• High-Pressure refrigent may cause
personal injury.
Use a dedicated outlet for this
appliance.
• There is risk of fire or electric shock.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
• There is risk of fire or electric shock.
Do not allow water to run into
electric part.
• There is risk of fire, failure of the
product, and/or electric shock.
8ft(2.4m)

Installation Manual 5
ENGLISH
Safety Precautions
Do not place a heater or other
appliances near the power cable.
•
There is risk of fire, failure of the product,
and/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 furnishings.
Do not store of use flammable
gas or combustibles near the air
conditioner.
• There is risk of fire or product failure.
Do not use the product in a
tightly closed space for a long
time.
• Oxygen deficiency could occur.
• Some ventilation by opeing window
is necessary for the fresh air.
When flammable gas leaks, turn off
the gas and open a window for
ventilation before turning the product
on. Do not use the telephone 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 fireproduct failure and/or
electric shock.
Stop operation and close any
window in storm or hurricane.
before the hurricane arrives.
• There is risk of property damage,
failure of product, or electric shock.
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.
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
• There is risk of electrical shock.
Wax
Thinner

6Room Air Conditioner
Safety Precautions
■Installation
Always check for gas(refrigerant)
leakage after installation or
repair of product.
• Low refrigerant levels may cause
product failure.
Install the drain hose to ensure
that water is drained away
properly.
• A bad connection may cause water
leakage.
Keep level even when installing
the product.
• To avoid vibration or water leakage.
90˚
Take care to ensure that nobody could step on or
fall onto the outdoor unit.
•There could result in personal injury and product damage.
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.
Ventilate the product from time to
time when operating it together
with a stove, etc.
•There is risk of fire or electrical shock.
Unplug the appliance before
performing cleaning or
maintenance.
•There is risk of electric 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.

Safety Precautions
Installation Manual 7
ENGLISH
■Operation
Do not install the product where
the noise or hot air from the
outdoor 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 in the product.
Corrosion, particularly on the
condenser and evaporator fins, could
cause product malfunction or
inefficient operation.
Do not direct airflow at room
occupants.
•This could damage your health.
Do not use the product for special
purposes, such as preserving
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 anything
on the product. (outdoor unit)
•There is risk of personal injury and
failure of product.

8Room Air Conditioner
Safety Precautions
■Disuse
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 damage.
Do not drink the water drained from the unit.
•It is not sanitary and could cause serious health issues.
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.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
•Be careful and avoid personal injury.
Replace all the batteries in the remote.
•There is risk of fire or explosion.

Installation Manual 9
ENGLISH
Introduction
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to
the air conditioner.
This symbol indicates special notes.
NOTICE
Introduction
Symbols Used In This Manual
Features
Air Intake Vents
Air Outlet Vents
Connecting
Wires
Piping
Drain Hose
Base Plate
Air Outlet
Vents
Air Intake
Vents Piping
Connecting
Wires
Drain Hose
Base Plate
Air Filter
Air Inlet
Front Panel
Signal Receptor

10 Room Air Conditioner
Installation
Type "A" screw and plastic anchor
Type "B" screw Remote Control Holder
Installation plate
Figure FigureName
Screw driver
Electric Drill
Measuring Tape, Knife
Hole Core Drill
Spanner
Torque wrench
Ohmmeter
Hexagonal wrench
Ammeter
Gas Leak Detector
Thermometer,
Level
Flaring Tool Set
Name
Installation Parts
Installation Tools
Installation
Read carefully, and then follow step by step.

Installation parts you should purchase.
Vinyl tape (Wide)
•Apply after carrying out a
drainage test.
•To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.
Saddle
Forced Operation Button
Gas side piping (Optional Parts)
Liquid side piping (Optional Parts)
Additional drain pipe
Vinyl tape (Narrow)
Drain Hose
Base Plate
Air Outlet Vents
Air Inlet Vents
Connecting cable
(Optional Parts)
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealer)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
NOTICE
Air Discarge
Vertical Air deflector
Operation Indication Lamps/
Signal Receptor
Installation Manual 11
ENGLISH
Installation
Installation Map
NOTE: refrigerant line wall thickness must be at least 0.8 mm (0.031 inch)

Installation
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
12 Room Air Conditioner
Example : Split type 12,000 Btu/h
120
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
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

Installation Manual 13
ENGLISH
Installation
Outdoor unit
1. If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.
2. Ensure that the space around the back and
sides is more than 10cm(3.9in).The front of
the unit should have more than 70cm(27.6in)
of space.
3. Do not place animals and plants in the path
of the warm air.
4.Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
5. Select a place so that the warm air and noise
from the air conditioner do not disturb
neighbors.
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.
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
conveniently routed away.
4. Do not install near a doorway.
5. Ensure that the space around the left and
right of the unit is more than 30cm(11.8in).
The unit should be installed as high on the
wall as possible, allowing a minimum of
12cm(4.7in) from ceiling.
6. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
Select The Best Location
Install the indoor unit on the wall where the height from the floors more than 2.3meters(7.6ft).
A minimum pipe run of 7.5meters(24.6ft) is required to minimize vibration and excessive noise.
More than
12cm(4.7in)
More than
30cm(11.8in)
More than
30cm(11.8in)
More than 8ft(2.4m)
More than
10cm(3.9in)
More than
10cm(3.9in)
More than
60cm(23.6in)
More than
60cm(23.6in)
More than
70cm(27.6in)

14 Room Air Conditioner
Installation
Piping Length And Elevation
•Capacity is based on standard length and maximum allowance length is on the basis of
reliability.
•Oil trap should be installed every 5~7meters (16.4~23.0ft).
Pipe Size
Capacity
(Btu/h)
Suction Evap
Max.
length
A m(ft) Additional Refrigerant
g/m(oz/ft)
Max.
Elevation
Bm(ft)
Standard
Length
m(ft)
In case more than 5m(16.4ft)
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
9k 3/8" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22)
1/2" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22)
12k 1/2" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22)
18k 1/2" 1/4" 7.5(25) 15(49) 30(98) 20(0.22)
5/8" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22)
24k 5/8" 1/4" 7.5(25) 7.5(25) 15(49) 20(0.22)

Installation Manual 15
ENGLISH
Installation
The wall you select should be strong and solid
enough to prevent vibration
1. Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a
concrete wall, use anchor bolts.
•Mount the installation plate horizontally by
aligning the centerline using a level.
2. Measure the wall and mark the centerline. It is also important to use caution concerning the
location of the installation plate-routing of the wiring to power outlets is through the walls typically.
Drilling the hole through the wall for piping connections must be done safely.
HowTo Mount Installation Plate
Chassis
Hook
Installation Plate
Type “A”
Installation plate
Left rear piping Right rear piping
Ø70mm Ø70mm
DB
A
C
•Drill the piping hole with a ø70mm(2.76in)
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
ABCD
S4 50 105 59 105
SE 65 110 85 110
S5 95 122 235 122
CHASSIS
(Grade)
Distance (mm)

16 Room Air Conditioner
Installation
Flaring Work
Cut 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 1.5m(59.1in) longer than the
pipe length.
Burrs removal
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
•Carry out flaring work using flaring tool as
shown below.
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
mm inch mm inch
Ø6.35 1/4 0~0.5 0~0.020
Ø9.52 3/8 0~0.5 0~0.020
Ø12.7 1/2 0~0.5 0~0.020
Ø15.88 5/8 0~1.0 0~0.039
Outside diameter A
Copper
pipe
90¡Slanted Uneven Rough
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe Reamer
Point down
Firmly hold copper pipe in a die in the
dimension shown in the table above.
Flare nut
Copper tube

Installation Manual 17
ENGLISH
Installation
Indoor
1. Prepare the indoor unit's piping and drain hose for installation through the wall.
2. Remove the plastic tubing retainer(see the
illustration by) and pull the tubing and drain
hose away from chassis.
3. Replace only the plastic tubing holder 1, not
the holder 2 in the original position.
Route the indoor tubing and the drain hose in
the direction of rear left.
Insert the connecting cable into the indoor unit
from the outdoor unit through the piping hole.
•Do not connect the cable to the indoor unit.
•Make a small loop with the cable for easy
connection later.
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.
NOTE: If the drain hose is routed inside the room,
insulate the hose with an insulation material* so that
dripping from "sweating"(condensation) will not
damage furniture or floors.
*Foamed polyethylene or equivalent is
recommended.
Indoor unit installation
•Hook the indoor unit onto the upper portion of
the installation plate.(Engage the three hooks
of the rear top and rear lower of the indoor unit
with the upper edge and lower edge of the
installation plate.) Ensure that the hooks are
properly seated on the installation plate by
moving it left and right.
Connecting the Piping
For left rear piping
Drain pipe
Connecting
cable
1 2
Installation plate
Spacer
Indoor unit
8cm
Connecting The Piping

18 Room Air Conditioner
Installation
Wrap the insulation material around the
connecting portion.
•Overlap the connection pipe insulation material
and the indoor unit pipe insulation material. Bind
them together with vinyl tape so that there is no
gap.
Route the indoor tubing and the drain hose to
the required piping hole position.
Plastic bands Insulation material
Connection pipe
Flare nut
Indoor unit tubing
Torque wrench
Spanner (fixed)
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
•When extending the drain hose at the indoor unit,
install the drain pipe.
•Mount the clamp on the boss with a type "B"
screw.(SE-H/P: 9k, 12k C/O: 12k)
•Tighten the flare nut with a wrench.
•Wrap the area which accommodates the rear
piping housing section with vinyl tape.
For right rear piping
Connecting the pipings to the indoor unit
and drain hose to drain pipe.
•Put a couple drops of refrigerant oil on the face of
the flare before assembling taking care not to add
any contaminants.
•Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Indoor unit tubing Flare nut Pipings
Drain hose
Ø6.35 1/4 1.8
Ø9.52 3/8 4.2
Ø12.7 1/2 5.5
Ø15.88 5/8 6.6
Outside diameter
mm inch
Torque
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide) Wrap with vinyl tape
Indoor
unit pipe
Pipe
•Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping housing
section.
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Drain hose
Clamp
Boss
Type "B" screw

Installation Manual 19
ENGLISH
Installation
Insert the connecting cable into the indoor unit.
•Don't connect the cable to the indoor unit.
•Make a small loop with the cable for easy
connection later.
Tape the drain hose and the connecting cable.
•Connecting cable
Connecting the pipings to the indoor unit and
the drain hose to drain pipe.
•Put a couple drops of refrigerant oil on the face of
the flare before assembling taking care not to add
any contaminants
•Align the center of the pipings and sufficiently
tighten the flare nut by hand.
•Tighten the flare nut with a wrench.
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
Indoor unit installation
•Hook the indoor unit onto the upper portion of
the installation plate.(Engage the three hooks of
the rear top and rear lower of the indoor unit with
the upper edge and lower edge of the installation
plate.) Ensure that the hooks are properly
seated on the installation plate by moving it left
and right.
Wrap the insulation material around the
connecting portion.
•
Overlap the connection pipe heat insulation and the
indoor unit pipe heat insulation material. Bind them
together with vinyl tape so that there is no gap.
Plastic bands Insulation material
Vinyl tape
Adhesive
Drain hose
Indoor unit drain hose
(narrow)
•When extending the drain hose at the indoor unit,
install the drain pipe.
Connecting
pipe
Connecting cable
Tape
Drain hose
Drain hose
Connecting
cable
Ø6.35 1/4 1.8
Ø9.52 3/8 4.2
Ø12.7 1/2 5.5
Ø15.88 5/8 6.6
Outside diameter Torque
•Mount the clamp on the boss with a type "B"
screw.(SE-H/P: 9k, 12k C/O: 12k)
Drain hose
Clamp
Boss
Type "B" screw

20 Room Air Conditioner
Installation
Reroute the pipings and the drain hose
across the back of the chassis.
Reroute the pipings and the drain hose
across the back of the chassis.
Drain hose Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
•Bundle the piping and drain hose together by
wrapping them with cloth tape over the range within
which they fit into the rear piping housing section.
Piping for
passage through
piping hole
Drain hose
Connecting
cable
•Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Indoor
unit piping
Pipe
Vinyl tape
(wide) Wrap with vinyl tape