Page 1
LG
Air Conditioner
INSTALLATION MANUAL
LG
Type : Wall Mounted
Indoor Unit
R18AWN-NC9
R22AWN-NC9
R24AWN-NC9
R28AWN-NC9
Outdoor Unit
R18AWN-UC9
R22AWN-UC9
R24AWN-UC9
R28AWN-UC9
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.
Page 2
2 Air Conditioner
Air Conditioner Installation Manual
CONTENTS
Safety Precautions............................3
Introduction ........................................6
Symbols used in this manual..........6
Installation ..........................................7
Installation parts...............................7
Installation tools ...............................7
Installation map................................8
Selecting the best location .............9
Fixing Installation Plate .................10
Drilling a hole in the wall ...............10
Flaring work ...................................11
Installation of indoor unit ...............12
Connecting the cables ..................18
Checking the drainage ..................20
Forming the piping.........................21
Air purging......................................22
Test running ...................................24
Installation guide at the seaside. ..26
Piping Length and Elevation.........27
❏ Some pieces of type "A" screws
❏ Connecting cable
❏ Installation guide map
❏ Pipes: Gas side
Liquid side
❏ Insulation materials
❏ Additional drain pipe
(Outer diameter ..............15.5mm)
❏ Some pieces of type "B" screws
❏ Some pieces of type "C" screws
❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill(ø70mm)
❏ Horizontal meter
❏ Flaring tool set
❏ Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m,
6.6kg.m
(different depending on model No.)
❏ Spanner ........................Half union
❏ A glass of water
❏ Hexagonal wrench(4mm)
❏ Gas-leak detector
❏ Vacuum pump
❏ Gauge manifold
❏ Owner's manual
❏ Thermometer
❏ Remote controller holder
Installation
Requirements
Required Parts Required Tools
Page 3
Installation Manual 3
Safety Precautions
To prevent the injury of 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.
■ 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.
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
Always use a power plug and socket with a ground terminal.
• There is a risk of electric shock.
Do not use a defective or underrated circuit breaker. Use the correctly rated breaker and fuse.
• There is risk of fire or electric shock .
Do not use a multi consent. Always use this appliance on a dedicated circuit breaker.
• Otherwise it can cause electric shock or fire.
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center. Do not disassemble
or repair the product by yourself.
• There is risk of fire or electric shock.
Always ground the product as per the wiring diagram. Do not connect the ground wire to gas or water pipes lightening
rod or telephone ground wire.
• 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 due to dust , water etc.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not modify or extend the power cable. If the power cable or cord has scrathes or skin peeled off or deteriorated then
it must be replaced.
• There is risk of fire or electric shock.
For installation, removal or reinstall , 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. Be sure that the installation area does not deteriorate with age.
• It may cause product to fall.
Never install the outdoor unit on a moving base or a place from where it can fall down.
• The falling outdoor unit can cause damage or injury or even death of a person.
When the product is soaked (flooded or submerged) in water , contact an Authorized Service Center for repair before
using it again.
• There is risk of fire or eletric shock.
In outdoor unit the step-up capacitor supplies high voltage electricity to the electrical components. Be sure to discharge
the capacitor completely before conducting the repair work.
• An charged capacitor can cause electrical shock.
Page 4
4 Air Conditioner
Safety Precautions
When installing the unit, use the installation kit provided with the product.
• Otherwise the unit may fall and cause severe injury.
Be sure to use only those parts which are listed in the svc parts list. Never attempt to modify the equipment.
• The use of inappropriate parts can cause an electrical shock, excessive heat generation or fire.
Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no
force pulling the cable from the connection terminals.
• Improper or loose connections can cause heat generation or fire.
Safely dispose off the packing materials. Like screws, nails, batteries, broken things etc after installation or svc and then
tear away and throw away the plastic packaging bags.
• Children may play with them and cause injury.
Make sure to check that the power cable plug is not dirty, loose or broken and then only insert the plug completely.
• Dirty, loose or broken power plug can cause electric shock or fire.
Be sure to check the refrigerant to be used. Please read the label on the product.
• Incorrect refrigerant used can prevent the normal operation of the unit.
Don't use a power cord, a plug or a loose socket which is damaged.
• Otherwise it may cause a fire or electrical shock.
Do not touch , operate, or repair the product with wet hands. Hold the plug by hand when taking out
• There is risk of electric shock or fire.
Do not place a heater or other heating appliances near the power cable.
• There is risk of fire and electric shock.
Do not allow water to run into electric parts. Install the unit away from water sources.
• There is risk of fire, failure of the product, or electric shock.
Do not store or use or even allow flammable gas or combustibles near the product.
• There is risk of fire.
Do not use the product in a tightly closed space for a long time. Perform ventilation regularly.
• Oxygen deficiency could occur and hence harm your health.
Do not open the front grille 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 failure.
If strange sound, smell or smoke comes from product.Immediately turn the breaker off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Ventilate the product room from time to time when operating it together with a stove, or heating element etc.
• Oxygen deficiency can occur and hence harm your health.
Turn the main power off and unplug the unit when cleaning or repairing the product.
• There is risk of electric shock.
When the product is not to 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.
Take care to ensure that nobody especially kids could step on or fall onto the outdoor unit.
• This could result in personal injury and product damage.
Take care to ensure that power cable could not be pulled out or damaged during operation.
• There is risk of fire or electric shock.
Do not place ANYTHING on the power cable.
• There is risk of fire or electric shock.
Do not plug or unplug the power supply plug to turn the unit ON/OFF .
• There is risk of fire or electric shock.
When flammable gas leaks, turn off the gas and open a window for ventilation befor turning on the product.
• Do not use the telephone or turn switches on or off. There is risk of explosion or fire.
Page 5
Installation Manual 5
Safety Precautions
Two or more people must 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.
Install the drain hose to ensure that the condensed water is drained away properly.
• A bad connection may cause water leakage.
Keep level even when installing the product.
• To avoid vibration or noise.
Do not install the product where the noise or hot air from the outdoor unit could damage or disturb the neighborhoods.
• It may cause a problem for your neighbors and hence dispute.
Always check for gas (refrigerant) leakage after installation or repair of product.
• Low refrigerant levels may cause failure of product.
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 or splashing water 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.
• There is risk of personal injury.
Do not step on or put anyting on the product. (outdoor units)
• There is risk of personal injury and failure of product.
Always insert the filter securely after cleaning. Clean the filter every two weeks or more often if necessary.
• A dirty filter reduces the efficiency.
Do not insert hands or other objects through the air inlet or outlet while the product is operating.
• There are sharp and moving parts that could cause personal injury.
Be cautious when unpacking and installing the product.
• Sharp edges could cause injury.
If the refrigerant gas leaks during the repair, do not touch the leakaing refrigerant gas.
• The refrigernat gas can cause frostbite (cold burn)
Do not tilt the unit when removing or uninstalling it.
• The condensed water inside can spill .
Do not mix air or gas other than the specified refrigerant used in the system .
• If air enters the refrigerant system, an excessively high pressure results, causing equipment damage or injury.
If the refrigerant gas leaks during the installation, ventilate the area immediately.
• Otherwise it can be harmfull for your health.
Dismantling the unit, treatment of the refrigerant oil and eventual parts should be done in accordance with local and
national standards. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and
new batteries or different types of batteries.
• There is risk of fire or product failure.
Do not recharge or disassemble the batteries. Do not dispose off 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.
If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if the batteries have leaked.
• The chemicals in batteries could cause burns or other health hazards.
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.
Do not expose your skin or kids or plants to the cool or hot air draft.
• This could harm to your health.
Do not drink the water drained from the product.
• It is not sanitary and could cause serious health issues.
Use a firm stool or ladder when cleaning, maintaining or repairing the product at an height.
• Be careful and avoid personal injury.
Page 6
6 Air Conditioner
The figure of product can be different according to the type of model.
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
Page 7
Type "A" screw
Type "C" screwType "B" screw
The feature can be changed according a type of model.
Remote control holder
Installation plate
Figure FigureName
Screw driver
Electric drill
Measuring tape, Knife
Hole core drill
Spanner
Torque wrench
Multi-meter
Hexagonal wrench
Ammeter
Gas-leak detector
Thermometer,
Level
Flaring tool set
Name
Installation Manual 7
Installation
Installation Parts
Installation Tools
Installation
Read carefully, and then follow step by step.
Page 8
8 Air Conditioner
Installation
Installation Map
Connecting cable
(Optional Parts)
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
Gas side piping (Optional Parts)
Liquid side piping (Optional Parts)
Additional drain pipe
Vinyl tape (Narrow)
Drain Hose
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealant)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
You should purchase the installation parts.
NOTICE
- The feature can be changed according a type of model.
Page 9
Installation Manual 9
Installation
Indoor unit
1. There should not be any heat or steam near
the unit.
2. Select a place where there are no obstacles
around 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 interval between a wall and
the left (or right) of the unit is more than
100mm. The unit should be installed as high
as possible on the wall, allowing a minimum
of 200mm from ceiling.
6. Use a metal detector to locate studs to
prevent unnecessary damage to the wall.
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 300mm. The space in front
of the unit should be more than 700mm of
space.
3. Do not place animals and plants in the path
of the warm air.
4. Take the weight of the air conditioner into
account and select a place where noise and
vibration are minimum.
5. Select a place where the warm air and noise
from the air conditioner do not disturb
neighbors.
Select the best Location
More than 200
More than
100
More than 2300
More than
100
(Unit : mm)
Install the indoor unit on the wall where the height from the floor is more than 2300mm.
More than
300
More than
300
Sunroof
Fence or
obstacles
More than
700
More than
600
(Unit : mm)
Page 10
10 Air Conditioner
Indoor unit
• Drill the piping hole with a ø70mm 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
(3/16"~5/16")
Indoor
WALL
Outdoor
Indoor unit
2. The wall you select should be strong and
solid enough to prevent vibration
• 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 Horizontal
meter .
1. 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.
Fixing Installation Plate
Installation Plate
Chassis
Hook
Type "A" Screws
Ø70
Ø70
69
56
Right rear
piping
Left rear
piping
Installation Plate
Measuring Tape
Measuring Tape
Hanger
Place a level on raised tab
Unit Outline
207
105
(Unit : mm)
460 570
Page 11
Installation Manual 11
Installation
Flaring Work
Main cause for gas leakage is due to defect of 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.
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.
Burrs removal
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.
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 finishing flare
work)
Flaring 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.
Copper
pipe
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Outside diameter A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Page 12
12 Air Conditioner
Installation
Check
1. Compare the flared work with the figure by.
2. If a flared section is defective, cut it off and
do flaring work again.
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Installation of Indoor Unit
1. Hook the indoor unit onto the upper portion of
the installation plate.( engage the three hooks
at the top of the indoor unit with the upper edge
of the installation plate) Ensure that the hooks
are properly seated on the installation plate by
moving it left and right
2. Unlock the tubing holder from the chassis and
mount between the chassis and installation
plate in order to separate the bottom side of the
indoor unit from the wall
Tubing Holder
1
2
Installation plate
Page 13
Installation
Installation Manual 13
Connecting the Piping
(1) Pull the screw cap at the bottom of the indoor unit
(2) Remove the chassis cover from the unit by loosing 3 screws
(Be careful not to scratch Horizontal Vane Main!)
(3) Pull back the tubing holder.
(4) Remove pipe port cover and position the
tubing.
Chassis Cover
Right
Indoor unit back side view
Tubing holder
Backwards
Left
Pipe Port
Page 14
14 Air Conditioner
Installation
Installation Information. For right piping. Follow the instruction below.
Good case
• Press on the tubing cover and unfold the tubing to downward slowly. And then bend to the left
side slowly.
Bad case
• Following bending case from right to left directly may cause damage to the tubing.
Page 15
Installation Manual 15
Installation
3. Tape the tubing pipe, drain hose and the connection cable. Be sure that the drain hose is located
at the lowest side of the bundle. Locating at the upper side can cause overflow from the drain pan
through the inside of the unit.
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.
Connecting the installation pipe and
drain hose to the indoor unit.
1. Align the center of the pipes and sufficiently
tighten the flare nut by hand
2. Tighten the flare nut with a wrench
3. When needed to extend the drain hose of
indoor unit, assembly the drain pipe as shown
on the drawing
Connecting pipe
Connecting
cable
Tape
Drain hose
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
Ø19.05 3/4 9.9~12.1
Outside diameter Torque
Indoor unit tubing Flare nut Pipes
Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
<Left side piping> <Right side piping>
Drain hose
Connecting pipe
Connecting
cable
Tape
Drain hose
Page 16
16 Air Conditioner
Installation
Wrap the insulation material around the
connecting portion.
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. 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.
Finishing the indoor unit installation
1.
Mount the tubing holder in the original positon.
2. Ensure that the hooks are properly seated on
the installation plate by moving it left and
right.
3. Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots (clicking sound).
4. Finish the assembly by screwing the unit to
the installation plate by using two pieces of
type "C" screws. And assemble a chassis
cover.
Insulation material
Vinyl tape(narrow)
Connection pipe
Connecting cable
Vinyl tape (wide)
Wrap with vinyl tape
Indoor unit pipe
Pipe
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Type 'C' screw
Page 17
Installation Manual 17
2. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
3. Finally, tighten the flare nut with torque
wrench until the wrench clicks.
• When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
Liquid side piping
(Smaller diameter)
Torque wrench
Gas side piping
(Bigger diameter)
Outdoor unit
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
Ø19.05 3/4 9.9~12.1
Outside diameter Torque
Installation
Outdoor unit
1. Remove the tubing cover from the unit by
loosening the screw.
Cover control
Tubing Cover
Terminal Block
1(L) 2(N) 3(C)
Page 18
18 Air Conditioner
Installation
Indoor unit
Connect the cable to the indoor unit by connecting the wires to the terminals on the control board
individually according to the outdoor unit connection. (Ensure that the color of the wires of the
outdoor unit and the terminal No. are the same as those of the indoor unit.)
Connecting the Cables
• The circuit diagram is a subject to change without notice.
• The earth wire should be longer than the common wires.
• When installing, refer to the circuit diagram on the chassis cover.
• Connect the wires firmly so that they may not be pulled out easily.
• Connect the wires according to color codes, referring to the wiring diagram.
The power cord connected to the unit should be selected according to the following
specifications(Type "B" approved by HAR or SAA).
The power connecting cable connecting the indoor and outdoor unit should be selected according
to the following specifications (Type "B" approved by HAR or SAA).
18k 22k, 24k, 28k
1.5 2.5
Unit(A) Indoor Indoor
Cable Type(B) H05VV-F H05VV-F
NORMAL CROSS SECTIONAL AREA
Grade
(mm2)
18k 22k, 24k, 28k
1.5 2.5
Cable Type(B) H07RN-F H07RN-F
NORMAL CROSS
-SECTIONAL AREA
Grade
(mm2)
Insert the connecting cable through the bottom side of indoor unit and connect the cable (You can
see detail contents in 'Connecting the cables' section)
(1) Open the Front Grille
(2) Support the Front Grille with supporter
(3) Open the Control Cover
(4) Connect the connecting cable
Control Cover
Page 19
Installation Manual 19
Installation
Outdoor unit
1. Connect the wires to the terminals on the
control board individually.
2. Secure the cable onto the control board with
the cord clamp.
3. Use a recognized circuit breaker between the
power source and the unit.
A disconnecting device to adequately
disconnect all supply lines must be fitted.
Cover control
Outdoor UnitOutdoor UnitOutdoor Unit
Connecting
cable
1(L) 2(N) 3(C)
According to 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. See 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 earth leakage 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, fuse breaking, 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 in each active(phase) conductors.
18k 22k, 24k, 28k
20 30
Circuit Breaker(A)
Grade
Provide the circuit breaker between power
source and the unit as shown by
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breake
or time delay fuse.
Page 20
20 Air Conditioner
Installation
Checking the Drainage
To check the drainage.
1. Pour a glass of water on the evaporator.
2. Ensure the water flows through the drain
hose of the indoor unit without any leakage
and goes out the drain exit.
Drain piping
1. The drain hose should point downward for
easy drain flow.
2. Do not make drain piping like the following.
Drain Pan
Drain
Hose
Leakage
Checking
Connecting area
drain hose
Leakage
checking
Downward slope
Do not raise
Accumulated
drain water
Tip of drain hose
dipped in water
Air
Waving
Water
leakage
Water
leakage
Ditch
Less than
50mm gap
Water
leakage
Page 21
Installation Manual 21
Installation
Forming the Piping
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.
In cases where the outdoor unit is
installed below the indoor unit
perform the following.
1. Tape the piping, drain hose and connecting
cable from down to up.
2. Secure the tapped piping along the exterior
wall using saddle or equivalent.
In cases where the Outdoor unit is
installed above the Indoor unit
perform the following.
1. Tape the piping and connecting cable from
down to up.
2. Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3. Fix the piping onto the wall using saddle or
equivalent.
Drain hose
Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
Taping
Drain hose
Pipings
Connecting cable
Trap is required to prevent water
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealer.
Seal a small opening
around the pipings
with gum type sealer.
Trap
Trap
Page 22
22 Air Conditioner
Installation
Air Purging
The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, after evacuating the system, take a leak test for the piping and tubing between the
indoor and outdoor unit.
Air purging with vacuum pump
1. Preparation
• Check that each tube(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 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.
2. Leak test
• Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with
charge hoses.
Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this
purpose. The knob of the 3-way valve must always be kept close.
• Pressurize the system to not more than 150 P.S.I.G. with dry nitrogen gas and close the cylinder
valve when the gauge reading reaches 150 P.S.I.G. Next, test for leaks with liquid soap.
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.
1. 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.
2. After the system is found to be free
of leaks, relieve 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.
Lo Hi
Indoor unit
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Pressure
gauge
Page 23
Installation Manual 23
Installation
Soap water method
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valve.
3. 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.
4. If bubbles come out, the pipes have leakage
Evacuation
1. 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 pressure Gauge is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump. The
following table shows the time required for
evacuation.
2. When the desired vacuum is reached, close the
knob of the 3-way valve and stop the vacuum
pump.
Finishing the Job
1. With a service valve wrench, turn the valve of
liquid side counter-clockwise to fully open the
valve
2. Turn the valve of gas side counter clockwise to
fully open the valve
3. Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.
4. 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
5. Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum pump.
6. Replace the pipe cover to the outdoor unit by
one screw
Now the air conditioner is ready for test run.
Outdoor unit
Gas side
Liquid side
Cap
Hexagonal wrench
3-way valve
(Open)
3-way valve
(Close)
Required time for evacuation when 30 gal/h vacuum
pump is used
10 min. or more 15 min. or more
If tubing length is less
than 10m (33 ft)
If tubing length is longer
than 10m (33 ft)
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open
Close
Page 24
24 Air Conditioner
Installation
1. Check that all tubing and wiring are properly connected.
2. Check that the gas and liquid side service valves are fully open.
• Rational type
1. Pull out the triple filter and allergy free filter from the separately packed plastic bag.
2. Insert the triple filter into the left case and insert the allergy free filter into the right case.
3. Detach two nitto tapes from the plasma filter.
Prepare remote controller
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.
3. Reattach the cover by pushing it back into
position.
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
•
Remove the batteries from the remote controller
if the system is not used for a long time.
NOTICE
Triple Filter Plasma FilterAllergy Free Filter
Test Running
Page 25
Installation Manual 25
Installation
If the actual pressure is 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.
NOTICE
PUMP DOWN
This is performed when the unit is relocated or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.
Be sure to perform Pump Down procedure in the 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 in the manifold hose using the refrigerant.
3. Close the liquid side service valve(all the way).
4. Turn on the unit's operating switch and start the cooling operation.
5. When the low-pressure gauge reading becomes 1 to 0.5kg/cm
2
G(14.2 to 7.1 P.S.I.G.), fully close
the gas side valve and then quickly turn off the unit. Now Pump Down procedure is completed,
and all refrigerant is collected into the outdoor unit.
Settlement of outdoor unit
1. Fix the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a
concrete or rigid mount.
2.
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.
3.
If the vibration of the unit is transmitted to the
pipe, secure the unit with an anti-vibration rubber.
Evaluation of the performance
Operate the unit for 15~20 minutes, then check
the system refrigerant charge:
1. Measure the pressure of the gas side service
valve.
2. Measure the air temperature from inlet and
outlet of air conditiioner.
3. Ensure the difference between the inlet and
outlet temperature is more than 8°C.
4. For reference; the gas side pressure at
optimum condition is shown on table (cooling)
The air conditioner is now ready to use.
Bolt
Tubing connection
Discharge
temperature
Discharge air
Intake temperature
R-410A 35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)
Outside ambient
TEMP.
Refrigerant
The pressure of the gas side
Page 26
26 Air Conditioner
Installation
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 malfunction 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.
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
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, then direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
2) In case of installing the outdoor unit on the sea side, setup a windbreak to prevent sea wind.
3) Select a well-drained place.
• It should be strong enough like concrete to prevent the
sea wind from the sea.
• The height and width should be more than 150%
of the outdoor unit.
• Keep more than 70 cm of space between
outdoor unit and the windbreak for easy air flow.
Sea wind Sea wind
Sea wind
Windbreak
Page 27
Installation Manual 27
Installation
Piping Length and Elevation
18k Ø12.7 1/2 Ø6.35 1/4 7.5 15 20 20
22k, 24k, 28k Ø15.88 5/8 Ø9.52 3/8 7.5 15 30 35
Pipe Size
Capacity
(Btu)
GAS LIQUID
mm inch mm inch
Additional
Refrigerant (g/m)
Standard
Length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Capacity is based on standard length and maximum allowable length is on the basis of reliability.
Additional refrigerant must be charged after 7.5m.
Page 28
P/No.: MFL59506813 Printed in Korea
After reading this manual, keep it in a place easily accessible to the user for
future reference.
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