LG
LG
Room Air Conditioner
INSTALLATION MANUAL
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.
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Safety Precautions
Safety Precautions
To prevent the injury of the user or other people and property damage, the following instructions
must be followed.
I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
I The meanings of the symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
I Installation
Do not use damaged power
cords, plugs, or a loose socket.
For electrical work, contact the
dealer, seller, a qualified
electrician, or an Authorized
Service Center.
Always use the power plug and
socket with the ground terminal.
• There is risk of electric shock.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
Install the panel and the cover of
control box securely.
Do not modify or extend the
power cord.
Do not install, remove, or re-
install the unit by yourself
(customer).
• There is risk of fire or electric shock.
• There is risk of fire, electric shock,
explosion or injury.
• There is risk of fire or electric shock.
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3
Safety Precautions
Be cautious when unpacking and
installing the product.
For installation, always contact
the dealer or an Authorized
Service Center.
Do not install the product on a
defective installation stand.
• Shape edges could cause injury. Be
especially careful of the sharp edges.
• There is risk of fire, electric shock,
explosion, or injury.
• It may cause injury, accident, or
damage to the product.
Be sure the installation area
does not deteriorate with age.
Install the indoor unit on the wall
where the height from the floors
more then 1.5m(4.9ft)
Do not handle the pipe by
yourself(customer)
• If the base collapses, the air
conditioner could fall with it, causing
property damage, product failure, and
personal injury.
• There are sharp moving parts that
could cause personal injury.
• High-Pressure refrigent may cause
personal injury.
1.5m(4.9ft)
I Operation
Use a dedicated outlet for this
appliance.
Grasp the plug to remove the
cord from the outlet. Do not
touch it with wet hands.
Do not allow water to run into
electric part.
• There is risk of fire or electric shock.
• There is risk of fire or electric shock.
• There is risk of fire, failure of the
product, and/or electric shock.
4
Room Air Conditioner
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Safety Precautions
Do not place a heater or other
appliances near the power cable.
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.
Do not store of use flammable
gas or combustibles near the air
conditioner.
•
There is risk of fire, failure of the product,
and/or electric shock.
• Moisture may condense and wet or
damage furnishings.
• There is risk of fire or product failure.
Do not use the product in a
tightly closed space for a long
time.
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.
Unplug the unit if strange
sounds odors or smoke comes
from it.
• Oxygen deficiency could occur.
• Some ventilation by opeing window
is necessary for the fresh air.
•
There is risk of fireproduct failure and/or
electric shock.
• There is risk of explosion or fire.
Stop operation and close any
window in storm or hurricane.
before the hurricane arrives.
Do not open the inlet grill of the
product during operation. (Do
not touch the electrostatic filter,
if the unit is so equipped.)
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
• There is risk of property damage,
failure of product, or electric shock.
• There is risk of physical injury, electric
shock, or product.
• There is risk of electrical shock.
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5
Safety Precautions
Ventilate the product from time to
time when operating it together
with a stove, etc.
Unplug the appliance before
performing cleaning or
maintenance.
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
• There is risk of fire or electrical shock.
• There is risk of electric shock.
failure, or unintended operation.
Take care to ensure that nobody could step on or
fall onto the outdoor unit.
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
• There could result in personal injury and product damage.
personal injury.
I Installation
Always check for gas(refrigerant)
leakage after installation or
repair of product.
Install the drain hose to ensure
that water is drained away
properly.
Keep level even when installing
the product.
• Low refrigerant levels may cause
product failure.
• A bad connection may cause water
leakage.
• To avoid vibration or water leakage.
90˚
6
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Safety Precautions
Do not install the product where
the noise or hot air from the
outdoor unit could damage the
neighborhoods.
Use two or more people to lift
and transport the air conditioner
Do not install the product where
it will be exposed to sea wind
(salt spray) directly.
• It may cause a problem for your
neighbors.
• It may cause corrosion in the product.
Corrosion, particularly on the
condenser and evaporator fins, could
cause product malfunction or
inefficient operation.
• Avoid personal injury.
I Operation
Do not direct airflow at room
occupants.
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.
Do not block the inlet or outlet of
air flow.
• There is risk of damage or loss of
• This could damage your health.
• It may cause product failure.
property.
Use a soft cloth to clean.
Do not use harsh detergents,
solvents, etc.
Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!
Do not step on or put anything
on the product. (outdoor unit)
• There is risk of fire, electric shock
or damage to the plastic parts of the
product.
• There is risk of personal injury and
failure of product.
• There is risk of personal injury.
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7
Safety Precautions
Always insert the filter securely. Clean the filter
every two weeks or more often if necessary.
Do not drink the water drained from the unit.
• A dirty filter reduces the efficiency of the air conditioner and
could cause product malfunction or damage.
• It is not sanitary and could cause serious health issues.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
Replace all the batteries in the remote.
• There is risk of fire or explosion.
• Be careful and avoid personal injury.
I Disuse
Do not recharge or disassemble the batteries. Do
not dispose of batteries in a fire.
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.
• They may burn or explode.
•
The chemicals in batteries could cause burns or other
health hazards.
8
Room Air Conditioner
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Introduction
Introduction
Symbols Used In This Manual
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
Features
Air Inlet
Air Filter
Front Panel
Signal Receptor
Air Intake Vents
Connecting
Wires
Connecting
Wires
Air Intake
Vents
Piping
Piping
Air Outlet
Vents
Drain Hose
Drain Hose
Air Outlet Vents
Base Plate
Base Plate
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9
Installation
Installation
Read carefully, and then follow step by step.
Installation Parts
Installation plate
Type "A" screw and plastic anchor
Remote Control Holder
Type "B" screw
Installation Tools
Figure
Name
Figure
Name
Screw driver
Ohmmeter
Electric Drill
Hexagonal wrench
Measuring Tape, Knife
Hole Core Drill
Ammeter
Gas Leak Detector
Thermometer,
Level
Spanner
Torque wrench
Flaring Tool Set
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Installation
Installation Map
NOTICE
Installation parts you should purchase.
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.
Air Discarge
Vertical Air deflector
Operation Indication Lamps/
Signal Receptor
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.
Forced Operation Button
Saddle
Gas side piping
Liquid side piping
Additional drain pipe
(Optional Parts)
(Optional Parts)
Air Inlet Vents
Air Outlet Vents
Vinyl tape (Narrow)
Drain Hose
Connecting cable
(Optional Parts)
Base Plate
NOTE: refrigerant line wall thickness must be at least 0.8 mm (0.031 inch)
Installation Manual 11
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Installation
Confirm The Refrigerant
1. Check the quality label on the indoor and outdoor unit.
2. Make certain that the refrigerant is R-410A.
NOTICE
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
Example : Split type 12,000 Btu/h
120
100
93
100
80
60
40
20
89
84
76
0
R-410A
R-22
100%
70%
50%
30%
0%
0%
30%
50%
70% 100%
4) High pressure.
- 1.6 times higher than R-22.
- High Pressure refrigerant may cause personal injury.
Boiling Pt.(°C)
Vapor pressure(25°C)(kg f/cnf)
Vapor density(25°C)(kg/m2)
R-410A
R-22
-51.4
-40.8
15.9
9.6
64
44.4
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.
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Installation
Select The Best Location
6. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
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.
More than
20cm(7.9in)
3. Make sure that condensation drainage can be
conveniently routed away.
More than
30cm(11.8in)
More than
30cm(11.8in)
4. Do not install near a doorway.
More than 1.5m(4.9ft)
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
20cm(7.9in) from ceiling.
Install the indoor unit on the wall where the height from the floors more than 1.5meters(4.9ft).
A minimum pipe run of 7.5meters(24.6ft) is required to minimize vibration and excessive noise.
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.
5. Select a place so that the warm air and noise
from the air conditioner do not disturb
neighbors.
2. Ensure that the space around the back and
sides is more than 30cm(11.8in). The front of
the unit should have more than 70cm(27.6in)
of space.
More than
60cm(23.6in)
More than
30cm(11.8in)
More than
30cm(11.8in)
3. Do not place animals and plants in the path
of the warm air.
More than
More than
70cm(27.6in)
60cm(23.6in)
4. Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
Rooftop Installations
If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure
and anchoring method are adequate for the unit location. Consult local codes regarding rooftop
mounting.
If the outdoor unit is installed on roof structures or walls, this may result in excessive noise and
vibration, and may be also classed as non serviceable installation.
Installation Manual 13
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Installation
Piping Length And Elevation
Pipe Size
Suction
Capacity
(Btu/h)
Additional Refrigerant
g/m(oz/ft)
Standard Length Max. Elevation
Max. length
m(ft)
m(ft)
m(ft)
Evap
12k
Ø12.7mm(1/2") Ø6.35mm(1/4")
7.5(25)
7.5(25)
15(49)
20(0.22)
Outdoor unit
Indoor unit
Outdoor unit
A
Oil trap
A
A
Indoor unit
B
Outdoor unit
Indoor unit
B
B
In case more than 5m(16.4ft)
• 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).
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Installation
How To Mount Installation Plate
The wall you select should be strong and solid
enough to prevent vibration
Installation Plate
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.
Chassis
Hook
Type “A”
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.
Distance [mm(in)]
CHASSIS
(Grade)
A
B
C
D
SE
65(2.6)
110(4.3)
85(3.3)
110(4.3)
Installation plate
B
D
A
C
Ø70mm
Ø70mm
Left rear piping
Right rear piping
Drill a Hole In The Wall
• 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.
WALL
Indoor
Outdoor
Installation Manual 15
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Installation
Flaring Work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes
purchased locally.
Copper
pipe
Slanted Uneven Rough
90¡
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
Pipe
Reamer
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.
Point down
Putting nut on
Flare nut
• Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube having
completed burr removal.
Copper tube
(not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using flaring tool as
shown below.
Firmly hold copper pipe in a die in the
dimension shown in the table above.
Handle
Outside diameter
A
Bar
Bar
mm
inch
1/4
3/8
1/2
5/8
3/4
mm
inch
Yoke
Cone
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
0.043~0.051
0.059~0.066
0.063~0.070
0.063~0.070
0.074~0.082
Copper pipe
Clamp handle
Red arrow mark
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Installation
Connecting TthheePPiippiinngg
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.
For left rear piping
Route the indoor tubing and the drain hose in
the direction of rear left.
1
2
Connecting
cable
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.
Drain pipe
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.
Indoor unit
Spacer
Installation plate
8cm
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Installation
Wrap the insulation material around the
connecting portion.
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.
• 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.
• Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Plastic bands
Insulation material
Indoor unit tubing
Flare nut Pipings
• Tighten the flare nut with a wrench.
Indoor unit tubing
• Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Indoor
unit pipe
Torque wrench
Connection
pipe
Connection pipe
Flare nut
Vinyl tape
(wide)
Wrap with vinyl tape
Spanner (fixed)
Connecting cable
Outside diameter
A
mm
inch
1/4
3/8
1/2
5/8
3/4
mm
inch
Pipe
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
0.043~0.051
0.059~0.066
0.063~0.070
0.063~0.070
0.074~0.082
Vinyl tape(narrow)
• 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.
• Mount the clamp on the boss with a type "B"
screw.(SE-H/P: 9k, 12k C/O: 12k)
Wrap with vinyl tape
Type "B" screw
Clamp
Drain hose
Pipe
Boss
Vinyl tape(wide)
Drain hose
• When extending the drain hose at the indoor unit,
install the drain pipe.
For right rear piping
Route the indoor tubing and the drain hose to
the required piping hole position.
Drain pipe
Indoor unit drain hose
Vinyl tape(narrow)
Adhesive
Drain hose
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Installation
Insert the connecting cable into the indoor unit.
Spanner (fixed)
• Don't connect the cable to the indoor unit.
• Make a small loop with the cable for easy
connection later.
Flare nut
Connection pipe
Torque wrench
Tape the drain hose and the connecting cable.
Indoor unit tubing
• Connecting cable
Outside diameter
A
mm
inch
1/4
3/8
1/2
5/8
3/4
mm
inch
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
0.043~0.051
0.059~0.066
0.063~0.070
0.063~0.070
0.074~0.082
Tape
Connecting
pipe
• Mount the clamp on the boss with a type "B"
screw.(SE-H/P: 9k, 12k C/O: 12k)
Drain hose
Connecting cable
Indoor unit installation
Type "B" screw
Clamp
Drain hose
• 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.
Boss
• When extending the drain hose at the indoor unit,
install the drain pipe.
Drain hose
Connecting
cable
Indoor unit drain hose
Drain hose
Vinyl tape (narrow)
Adhesive
Wrap the insulation material around the
connecting portion.
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.
•
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
Indoor unit tubing
Flare nut Pipings
• Tighten the flare nut with a wrench.
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Installation
• Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Reroute the pipings and the drain hose
across the back of the chassis.
Indoor
unit piping
Connection
pipe
Vinyl tape
(wide)
Wrap with vinyl tape
Pipe
Vinyl tape(narrow)
Piping for
passage through
piping hole
Connecting cable
Reroute the pipings and the drain hose
across the back of the chassis.
• 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.
Connecting
cable
Pipe
Drain hose
Vinyl tape(narrow)
Drain hose
Wrap with
vinyl tape(wide)
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Installation
Installation Information. For left piping. Follow the instruction below.
Correct case
• Press on the upper side of clamp and unfold the tubing to downward slowly.
Incorrect case
• Following bending type from right to left may cause damage to the tubing.
Installation Manual 21
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Installation
Connectinogn tOhfeTPhiepiDnrgain Hose
• The drain hose can be connected at two different
positions. Use the most convenient position and, if
necessary, exchange the position of the drain pan,
rubber cap and the drain hose.
2
4
ꢀ Drain pan
3
ꢁ Rubber cap
ꢂ Drain hose
ꢃ Exchange if necessary
• Remove the drain hose.
1
• Securely insert both the rubber plug and drain
hose into the drain outlets.
Be sure the rubber the cap is securely fastened so
that there is no leakage.
Connectinogn tOhfePPipipiningg-Outdoor
Put a couple drops of refrigerant oil on the face
of the flare before assembling taking care not to
add any contaminants.
Outdoor unit
Suction Line piping
(Bigger diameter)
Align the center of the pipings and sufficiently
tighten the flare nut by hand.
Evaporator Line
piping
(Smaller
diameter)
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
Torque wrench
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow
on the wrench.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Torque
kgf·cm
inch
1/4
3/8
1/2
5/8
1/4
180~250
340~420
550~660
630~820
980~1210
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Installation
Connectinogn tOhfeTPhiepiCnagble
1. Remove the cover control from the unit by
loosening the 3 screws.
Wiring Diagram
Connecting cable(Low voltage)
b
2. Dismount caps on the conduit panel.
Indoor Unit
Outdoor Unit
Terminal
(4P)
Terminal
(6P)
3. Temporarily mount the conduit tubes on the
conduit panel.
1
2
3
4
1
2
3
4
4. Properly connect both the power supply and
low voltage lines to the corresponding
terminals on the terminal block.
Power supply
a
5
L1*
6
L2
5. Ground the unit in accordance with local
codes.
To
branch
G
circuit
6. Be sure to size each wire allowing several
inches longer than the required length for
wiring.
Ground
L1 is neutral for 115V models.
*
7. Use lock nuts to secure the conduit tubes.
NOTE
1.
shows field wiring.
2. Separately wire the high and low voltage line.
3. Use heat-proof electrical wiring capable of
withstanding temperatures up to 167°F.
4. Use outdoor and waterproof connection cable
rated more than 300V for the connection between
indoor and outdoor unit.
NOTE
Connector trade size for this unit is 1/2"
for instructions on connecting depending on
the wire type you are using.
(For example,Type STOW)
WARNING
• Be sure to comply with local codes while
running the wire from the indoor unit to the
outdoor unit(size of wire and wiring method,
etc).
Outdoor unit
Terminal block
• Every wire must be connected firmly.
• No wire should be allowed to touch
refrigerant tubing, the compressor or any
moving parts.
Over 5mm
(0.2")
Conduit panel
Connecting
cable
Power Supply
Fuse or breaker
Capacity
AWG(MIN.)
14 18
Power supply
cord
Model Power source
12k 1ø, 115V
20A
Cover control
Installation Manual 23
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Installation
How to use the front panel
1. Front panel opening
Hold the two ends of the front panel at the
bottom and move it upward.
Front panel
2. Front panel closing
Move the link upward and close the front
panel.
3. Front panel removing
Raise the link up to hook hanger and remove
front panel forward.
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power circuit specifically for the air conditioner. As for
the method of wiring, be guided by the circuit diagram posted on the inside of control
cover.
2) 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 cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) Confirm that the starting voltage is maintained at more than 90 percent of the rated
voltage marked on the name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7) Always install an GFCI circuit breaker in a wet or moist area.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, open fuse, disturbance of the
normal function of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed
wiring and have an air gap contact separation of at least 3mm(0.12in) in each
active(phase) conductors.
24 Room Air Conditioner
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Installation
Checking The Drainage
• Pour a glass of water on the drain pan.
• Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain
exit.
Connecting area
drain hose
Leakage
checking
Drain pan
Drain
hose
Leakage
checking
Drain piping
• The drain hose should point downward for easy drain flow.
Downward slope
• Avoid these situations.
Accumulated
Do not raise
drain water
Less than
50mm gap
Tip of drain hose
dipped in water
Air
Water
leakage
Water
leakage
Water
leakage
Waving
Ditch
Installation Manual 25
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Installation
Forming The Piping
In cases where the Outdoor unit is installed
above the Indoor unit perform the following.
Form the piping by wrapping the connecting
portion of the indoor unit with insulation material
and secure it with two kinds of vinyl tapes.
• If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.
•
•
•
Tape the piping and connecting cable from down to
up.
Secure the taped piping along the exterior wall. Form
a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or equivalent.
In cases where the outdoor unit is installed
below the indoor unit perform the following.
•
Tape the piping, drain hose and connecting cable
from down to up.
Secure the tapped piping along the exterior wall
using saddle or equivalent.
Seal a small opening
around the pipings
with gum type sealer.
•
Trap
Seal small openings
around pipings with a
gum type sealer.
Trap
Taping
Drain
hose
Pipings
Connecting
cable
Trap is required to prevent water
from entering into electrical parts.
26 Room Air Conditioner
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Installation
Air Purging
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
• Pressure in the system rises.
• Operating current rises.
• Cooling(or heating) efficiency drops.
• Moisture in the refrigerant circuit may freeze and block capillary tubing.
• Water may lead to corrosion of parts in the refrigeration system.
Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated
to remove any noncondensables and moisture from the system.
Air purging With Vacuum Pump
• Do a leak test of all joints of the tubing(both indoor
and outdoor) and both gas and liquid side service
valves.
Bubbles indicate a leak. Be sure to wipe off the soap
with a clean cloth.
Preparation
• Check that each tubing(both liquid and gas side
tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test
run has been completed. Remove the service • After the system is found to be free of leaks, relieve
valve caps from both the gas and the liquid side
on the outdoor unit. Note that both the liquid and
the gas side service valves on the outdoor unit are
kept closed at this stage.
the nitrogen pressure by loosening the charge hose
connector at the nitrogen cylinder. When the system
pressure is reduced to normal, disconnect the hose
from the cylinder.
Leak test
• Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
Manifold valve
Indoor unit
Pressure
gauge
Lo
Hi
CAUTION
Be sure to use a manifold valve for air
purging. If it is not available, use a stop
valve for this purpose. The "Hi" knob of
the manifold valve must always be kept
close.
Charge hose
Outdoor unit
Nitrogen gas
cylinder(in vertical
standing position)
• Pressurize the system to no more than 150 P.S.I.G.
with dry nitrogen gas and close the cylinder valve
when the gauge reading reached 150 P.S.I.G. Next,
test for leaks with liquid soap.
CAUTION
To avoid nitrogen entering the refrigerant system in
a liquid state, the top of the cylinder must be higher
than its bottom when you pressurize the system.
Usually, the cylinder is used in a vertical standing
position.
Installation Manual 27
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Installation
Soap water method
(1) Remove the caps from the gas side and
Suction Line
liquid side valves.
(2) Remove the service-port cap from the gas
side valve.
(3) To open the gas side valve turn the valve
stem counterclockwise approximately 90°,
wait for about 2~3 seconds, and close it.
(4) Apply a soap water or a liquid neutral
detergent on the indoor unit connection or
outdoor unit connections by a soft brush to
check for leakage of the connecting points
of the piping.
Evaporator Line
3-way valve
(Close)
3-way valve
(Open)
(5) If bubbles come out, the pipes have
leakage.
Cap
Hexagonal wrench
Evacuation
• Connect the charge hose end described in the
preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
Indoor unit
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
evacuation.
Required time for evacuation when 30 gal/h
vacuum pump is used
Outdoor unit
if tubing length is longer
than 10m (33 ft)
If tubing length is less
than 10m (33 ft)
10 min. or more
15 min. or more
• When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
Finishing the job
Manifold valve
• With a service valve wrench, turn the valve
stem of liquid side valve counter-clockwise to
fully open the valve.
• Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
Pressure
gauge
Lo
Hi
• Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.
Open
Close
• Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent leakage from the system.
• Replace the valve caps at both gas and liquid side
service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
Vacuum pump
28 Room Air Conditioner
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Installation
Charging
I Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line
set. Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) line set length the
refrigerant charge has to be adjusted.
I Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing
are either added or removed based on 30g(0.32oz) of R-410A per meter(foot).
Pipe Size
Suction
Capacity
(Btu/h)
Additional Refrigerant
g/m(oz/ft)
Standard Length Max. Elevation
Max. length
m(ft)
m(ft)
m(ft)
Evap
12k
Ø12.7mm(1/2") Ø6.35mm(1/4")
7.5(25)
7.5(25)
15(49)
20(0.22)
Example: A 30ft line set is used
5 additional ft X 0.22 ounce per foot= add 1.1 ounces of R-410A
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit
nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft).
Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A.
Installation Manual 29
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Test Running
Test Running
1. Check that all tubing and wiring have been
properly connected.
3. Ensure the difference between the intake
temperature and the discharge is more than
46.4°F(8°C) (Cooling) or (Heating).
2. Check that the gas and liquid side service valves
are fully open.
Intake temperature
Prepare remote control
Discharge air
1. Remove the battery cover
by pulling it according to the
arrow direction.
2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
Discharge
temperature
3. Reattach the cover by
pushing it back into position.
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Outside ambient TEMP.
The pressure of the gas side service valve
8.5~9.5kg/cm2 G(120~135 P.S.I.G.)
NOTE:
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
95°F(35°C)
NOTE: If the actual pressure are higher than
shown, the system is most likely over-
charged, and charge should be removed. If
the actual pressure are lower than shown,
the system is most likely undercharged, and
charge should be added.
• Remove the batteries from the remote control if
the system is not going to be used for a long
time.
Settlement of outdoor unit
The air conditioner is now ready for use.
I
I
I
Anchor the outdoor unit with a bolt and
nut(ø10mm(0.39in) tightly and horizontally on a
concrete or rigid mount.
When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
In the case when the vibration of the unit is
conveyed to the hose, secure the unit with an anti-
vibration rubber.
PUMP DOWN
This is performed when the unit is to be
relocated or the refrigerant circuit is
serviced.
Pump Down means collecting all refrigerant in
the outdoor unit without loss of refrigerant.
CAUTION:
Be sure to perform Pump Down procedure
Bolt
with the unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose
to the charge port on the gas side service
valve.
2. Open the gas side service valve halfway and
purge the air from the manifold hose using the
refrigerant gas.
Tubing connection
3. Close the liquid side service valve(all the way
Evaluation of the performance
in).
4. Turn on the unit's operating switch and start
the cooling operation.
Operate unit for 15~20 minutes, then check the
system refrigerant charge:
1. Measure the pressure of the gas side service
valve.
2. Measure the temperature of the intake and
discharge of air.
5. When the low-pressure gauge reading
2
becomes 1 to 0.5kg/cm G(14.2 to 7.1
P.S.I.G.), fully close the gas side valve stem
and then quickly turn off the unit. At that time,
Pump Down has been completed and all
refrigerant will have been collected in the
outdoor unit.
30 Room Air Conditioner
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Installation guide at the seaside
Installation guide at the seaside
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-
tion or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
Sea wind
Sea wind
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
• It should be strong enough like concrete to prevent
the sea wind from the sea.
Windbreak
• The height and width should be more than 150% of
the outdoor unit.
Sea wind
• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
3) Select a well-drained place.
1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
Installation Manual 31
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32 Room Air Conditioner
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P/No.: 3828A30087S
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