Page 1
• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
TIPS FOR SAVING ENERGY
• Do not use copper pipes having a collapsed.
- Otherwise, the expansion valve or capillary tube may become blocked with contaminants.
• For R410A model, use piping, flare nut and tools which is specified for R410A refrigerant.
- Using of (R22) piping, flare nut and tools may cause abnormally high pressure in the refrigerant
cycle (piping), and possibly result in explosion and injury.
• It is desirable that the amount of residual oil less than 40 mg/10m.
Operation
• Do not share the outlet with other appliances.
- It will cause an electric shock or a fire due to heat generation.
• Do not use the damaged power cord.
- Otherwise, it may cause a fire or electrical shock.
• Do not modify or extend the power cord randomly.
- Otherwise, it may cause a fire or electrical shock.
• Take care so that the power cord may not be pulled during operation.
- Otherwise, it may cause a fire or electrical shock.
• Unplug the unit if strange sounds, smell, or smoke comes from it.
- Otherwise, it may cause electrical shock or a fire.
• Keep the flames away.
- Otherwise, it may cause a fire.
• Take the power plug out if necessary, holding the head of the plug and do not touch it with wet
hands.
- Otherwise, it may cause a fire or electrical shock.
• Do not use the power cord near the heating tools.
- Otherwise, it may cause a fire and electrical shock.
• Do not open the suction inlet of the indoor/outdoor unit during operation.
- Otherwise, it may electrical shock and failure.
• Do not allow water to run into electrical parts.
- Otherwise, it may cause the failure of machine or electrical shock.
• Hold the plug by the head when taking it out.
- It may cause electric shock and damage.
• Never touch the metal parts of the unit when removing the filter.
- They are sharp and may cause injury.
• Do not step on the indoor/outdoor unit and do not put anything on it.
- It may cause an injury through dropping of the unit or falling down.
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.
Taping Direction
NOTE
!
• You should purchase the installation parts.
* The feature can be changed according to a type of model.
INSTALLATION MAP
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product.
WARNING
It can result in serious injury or death when the directions are ignored.
CAUTION
It can result in minor injury or product damage when the directions are ignored.
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Air conditioner Shall be installed in accordance with national wiring regulations.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similary
qualified persons in order to avoid a hazard.
• The information contained in the manual is intended for use by a qualified service technician familiar
with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.
Installation
• Always perform grounding.
- Otherwise, it may cause electrical shock.
• Don’t use a power cord, a plug or a loose socket which is damaged.
- Otherwise, it may cause a fire or electrical shock.
• For installation of the product, always contact the service center or a professional installation
agency.
- Otherwise, it may cause a fire, electrical shock, explosion or injury.
• Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor unit.
- If the electrical part cover of the indoor unit and the service panel of the outdoor unit are not
attached securely, it could result in a fire or electric shock due to dust, water, etc.
• Always install an air leakage breaker and a dedicated switching board.
- No installation may cause a fire and electrical shock.
• Do not keep or use flammable gases or combustibles near the air conditioner.
- Otherwise, it may cause a fire or the failure of product.
• Ensure that an installation frame of the outdoor unit is not damaged due to use for a long time.
- It may cause injury or an accident.
• Do not disassemble or repair the product randomly.
- It will cause a fire or electrical shock.
• Do not install the product at a place that ther is concern of falling down.
- Otherwise, it may result in personal injury.
• Use caution when unpacking and installing.
- Sharp edges may cause injury.
• Thickness of copper pipes used are as shown “Flaring work” Table.
- Never use copper pipes thinner than that in the table even when it is available on the market
!
!
!
• Do not place a heavy object on the power cord.
- Otherwise, it may cause a fire or electrical shock.
• When the product is submerged into water, always contact the service center.
- Otherwise, it may cause a fire or electrical shock.
• Take care so that children may not step on the outdoor unit.
- Otherwise, children may be seriously injured due to falling down.
• Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box
cover are removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or death.
CAUTION
Installation
• Install the drain hose to ensure that drain can be securely done.
- Otherwise, it may cause water leakage.
• Install the product so that the noise or hot wind from the outdoor unit may not cause any damage to
the neighbors.
- Otherwise, it may cause dispute with the neighbors.
• Always inspect gas leakage after the installation and repair of product.
- Otherwise, it may cause the failure of product.
• Keep level parallel in installing the product.
- Otherwise, it may cause vibration or water leakage.
Operation
• Avoid excessive cooling and perform ventilation sometimes.
- Otherwise, it may do harm to your health.
• Use a soft cloth to clean. Do not use wax, thinner, or a strong detergent.
- The appearance of the air conditioner may deteriorate, change color, or develop surface flaws.
• Do not use an appliance for special purposes such as preserving animals vegetables, precision machine, or art articles.
- Otherwise, it may damage your properties.
• Do not place obstacles around the flow inlet or outlet.
- Otherwise, it may cause the failure of appliance or an accident.
!
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.
Features
!
INTRODUCTION
!
Air inlet vents
Air outlet vents
Base plate
Coolant piping
Connection wire
Drain hose
* The feataure can be changed according to type of model.
Air inlet
Operation lamp
Front grille
Signal receiver
Air deflector
(Vertical louver & Horizontal vane)
Air outlet
On/ Off button
Select the best Location
Indoor unit
- There should not be any heat or steam near
the unit.
- Select a place where there are no obstacles
around of the unit.
- Make sure that condensation drainage can
be conveniently routed away.
- Do not install near a doorway.
- 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.
- Use a metal detector to locate studs to prevent unnecessary damage to the wall.
* The feature can be changed according to a
type of model.
More than 200
More than
100
More than
100
(Unit : mm)
More than
300
More than
300
Sunroof
Fence or
obstacles
More than
700
More than
600
(Unit : mm)
Outdoor unit
- 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.
- 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.
- Do not place animals and plants in the path
of the warm air.
- Take the weight of the air conditioner into account and select a place where noise and vibration are minimum.
- Select a place where the warm air and noise
from the air conditioner do not disturb neighbors.
INSTALLATION
Name Quantity Shape
Installation plate 1 EA
Type "A" screw
5 EA
Type "B" screw
2 EA
Type "C" screw
2 EA
Remote control
holder
1 EA
The feature can be changed according to a type of model.
Screws for fixing panels are attached to decoration panel.
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 TOOLS
INSTALLATION PARTS
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.
Drill a Hole in the Wall
- Drill the piping hole with a ø65mm hole core
drill. Drill the piping hole at either the right or
the left with the hole slightly slanted to the
outdoor side.
Ø70
100
145
Right rear
piping
Left rear
piping
Place a level on raised tab
Unit Outline
199
148
(Unit : mm)
399 399
Installation Plate
Measuring Tape
Measuring Tape
Hanger
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
2 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.
3 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.
Indoor unit
Fixing Installation Plate
The wall you select should be strong and solid
enough to prevent vibration.
1 Before installation, confirm the position of
a screw between chassis and Installation
plate.
Type "A" Screws
Type "A" Screws
Type "A" Screws
Installation Plate
Installation Plate
Installation Plate
Chassis
Hook
Chassis
Hook
Chassis
Hook
Ø65
Ø65
145 75
Right rear piping
Left rear piping
Installation Plate
Place a level on raised tab
Unit Outline
192192
(Unit : mm)
378 378
Copper
pipe
90°
Slanted Uneven Rough
Ø65
170
Right rear piping
Left rear piping
Place a level on raised tab
Unit
Outline
217
175
(Unit : mm)
434 439
Ø65Ø65
123
Installation Plate
Ø70
Installation of Indoor Unit
1 Hook the indoor unit onto the upper por-
tion 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
1
2
Installation plate
Good case
- Press on the tubing cover and unfold the
tubing to downward slowly. And then bend
to the left side slowly.
3 Pull back the tubing holder.
4 Remove pipe port cover and positioning
the tubing
* The feature can be changed according to a
type of model.
Right
Back side view
9K/12K
18K
Tubing holder
Backwards
Left
Pipe Port
Pipe Port
Right
Tubing holder
Backwards
Left
Drain Hose
Drain Hose
CAUTION
Installation Information. For right piping.
Follow the instruction above.
!
Bad case
- Following bending case from right to left directly may cause damage to the tubing.
* The feature can be changed according to a
type of model.
Indoor unit tubing Flare nut Pipes
Connecting the installation pipe
and drain hose to the indoor unit.
1 Align the center of the pipes and suffi-
ciently 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
Wrench
Indoor unit tubing
Open-end wrench
(fixed)
Connection
pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Wrap the insulation material
around the connecting portion.
1 Overlap the connection pipe insulation ma-
terial and the indoor unit pipe insulation
material. Bind them together with vinyl
tape so that there may be no gap.
2 Set the tubing cutting line upward.
Wrap the area which accommodates the
rear piping housing section with vinyl tape.
3 Bundle the piping and drain hose together
by wrapping them with vinyl tape sufficient
enough to cover where they fit into the
rear piping housing section.
Insulation material
Gas Pipe
Liquid Pipe
Cutting Line
Cutting Line
Good Case Bad Case
* Tubing cutting line have to be upward.
Vinyl tape(narrow)
Connection pipe
Connecting cable
Vinyl tape (wide)
Wrap with vinyl tape
Indoor unit pipe
Pipe
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Outside Diameter Torque
mm inch kgf.m N.m
Ø6.35 1/4 180~250 17.6~24.5
Ø9.52 3/8 340~420 33.3~41.2
Ø12.7 1/2 550~660 53.9~64.7
Ø15.88 5/8 630~820 61.7~80.4
- 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
Outside Diameter Torque
mm inch kgf.m N.m
Ø6.35 1/4 180~250
17.6~24.5
Ø9.52 3/8 340~420 33.3~41.2
Ø12.7 1/2 550~660 53.9~64.7
Ø15.88 5/8 630~820 61.7~80.4
- Align the center of the pipings and sufficiently tighten the flare nut by hand.
CAUTION
- 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.
!
Chassis cover
12K/18K
9K
Connecting cable
Connecting cable
1(L) 2(N) 3
1(L) 2(N)
3
Connecting the Cables
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.)
1 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)
2 Secure the cable onto the control board
with the cable retainer.
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.
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.
Pipe
Reamer
Point down
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 di-
mension shown in the table below .
2 Carry out flaring work with the flaring tool.
Flare nut
Copper tube
Outside diameter A Thickness
mm inch mm mm
Ø6.35 1/4" 1.1~1.3 0.7
Ø9.52 3/8" 1.5~1.7 0.8
Ø12.7 1/2" 1.6~1.8 0.8
Ø15.88 5/8" 1.6~1.8 1.0
Ø19.05 3/4" 1.9~2.1 1.0
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
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.
Connecting the Piping
1 Open the panel of the indoor unit.
2 Remove the chassis cover from the unit by
loosing 2 screws.
Chassis cover
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
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.
* The feature can be changed according to a
type of model.
Piping
1 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)
<Left side piping>
<Right side piping>
Control Cover
Terminal block
Connecting cable
1(L) 2(N) 3
Tubing Holder
2 Secure the cable onto the control board
with the cable retainer.
3 Lift up the cover of terminal block slightly.
4
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.
<Left side piping>
<Right side piping>
* The feature can be changed according to a
type of model.
Control Cover
Terminal block
Connecting cable
1(L) 2(N) 3
Drain hose
Connecting pipe
Connecting
cable
Tape
Drain hose
Connecting pipe
Connecting
cable
Tape
Drain hose
NOTE
!
Insert the drain hose at left side when
you use left side piping type.
CAUTION
If the extension drain hose is routed inside the
room, insulate the hose with an insulation
material* so that dripping from sweating (condensation) could not damage furniture or floors.
• Foamed polyethylene or equivalent is
recommended.
!
Indoor Outdoor
Indoor Unit
Drain hose
Indoor Unit
Drain hose
Insulation
(More than 100~300mm
length and 7mm thickness)
Extension
drain hose
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.
Type 'C' screw
Outdoor unit
Connecting the Piping
- Remove the tubing cover from the unit by
loosening the screw.
Cover control
Tubing Cover
Terminal Block
L N
1(L)2(N) 3
Power
connecting
cable
Power
cord
Cord clamp
Terminal Block
Tubing
Cover
• 18 K
• 9 K/12K
The power cord connected to unit should
be selected according to the following national wiring regulations.
The supply cords of parts of appliances for
outdoor use shall not be lighter than polychloroprene sheathed flexible cord. (code
designation 60245 IEC 57, H05RN-F)
NORMINAL CROSS SEC-
TIONAL AREA
Grade
2.5~3.5kw
5.0kw 18K
1.0 1.5
5.0kw 18K
20A
5.0kw 18K
0.75
(mm2)
NORMINAL CROSS
SECTIONAL AREA
Grade
2.5~3.5kw
0.75
(mm2)
10±3mm
20mm
GN/YL
Cover control
Outdoor UnitOutdoor Unit
Power
connecting
cable
Power cord
1(L)
L N
)N(2 3
Tubing Cover
L N 3
1(L) 2(N)
• 18K
• 9K/12K
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breake
or time delay fuse.
10±3mm
20mm
GN/YL
The power connecting cable with indoor and
outdoor unit should be selected according to
the following national wiring regulations.
The supply cords of parts of appliances for
outdoor use shall not be lighter than polychloroprene sheathed flexible cord.
(code designation 60245 IEC 57, H05RN-F)
- Connect the wires to the terminals on the
control board individually.
- Secure the cable onto the control board with
the cord clamp.
- Use a recognized circuit breaker between
the power source and the unit.
A disconnecting device to adequately disconnect all supply lines must be fitted.
Circuit Breaker(A)
Grade
2.5~3.5kw
15A
CAUTION
Provide the circuit breaker between
power source and the unit as shown by
!
CAUTION
!
Outdoor
1 2 3
54 6 7
INSTALLATION MANUAL AIR CONDITIONER
TYPE : WALL MOUNTED
P/No : MFL68802301
ENGLISH
Page 2
In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to
the sea wind.
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.
- It should be keep more than 70 cm of space
between outdoor unit and the windbreak for
easy air flow.
CAUTION
- Air conditioners should not be installed
in areas where corrosive gases, such as
acid or alkaline gas, are produced.
- 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.
- 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.
!
Sea wind
Sea wind
Sea wind
Windbreak
Selecting the location(Outdoor Unit)
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.
Installation guide at the seaside
NOTE
!
- If you can’t meet above guide line in
the seaside installation, please contact LG Electronics for the additional
anticorrosion.
- Periodic ( more than once/year )
cleaning of the dust or salt particles
stuck on the heat exchanger by using
water.
* Do not use seawater when you
clean up the heat exchanger.
Piping Length and Elevation
Capacity
(W)
Pipe Size
Standard
Length
(m)
Max.
Length
(m)
Max.
Elevation
(m)
Additional Refrigerant (g/m)
(after 5 m)
GAS LIQUID
mm inch mm inch
2.5k, 3.5k
5.0k
Ø9.52 3/8 Ø6.35 1/4 20
Ø12.7 1/2 Ø6.35 1/4 20710152055
A B
Outdoor unit
Indoor unit
A
Operation ranges
Mode Indoor temperature Outdoor temperature
Cooling 18°C ~ 32°C -10°C ~ 48°C
Heating 16°C ~ 30°C -10°C ~ 24°C
B
Outdoor unit
Indoor unit
A
B
CAUTION
Capacity is based on standard length and maximum allowable length is on the basis of reliability.
Additional refrigerant must be charged after 5 m.
!
The table below indicates the temperature ranges the air conditioner can be operated within.
CAUTION
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 suffi-
cient.
5 See that the starting voltage is main-
tained 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 volt-
age 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.
!
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.
Drain Pan
Drain
Hose
Leakage
Checking
Connecting area
drain hose
Leakage
checking
Downward slope
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
Seal a small opening
around the pipings
with gum type sealant.
Trap
Trap
Air Purging
The 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, after evacuating the system, take a
leak test for the piping and tubing between
the indoor and outdoor unit.
- 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.
- Leak test
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
Air purging with vacuum pump
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.
!
WARNING
There is a risk of fire and explosion.
- Inert gas (nitrogen) should be
used when you check plumbing
leaks, cleaning or repairs of pipes etc.
If you are using combustible gases including oxygen, product may have the risk of
fires and explosions.
!
CAUTION
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 3way valve must always be kept close.
- Pressurize the system to maximum
17.6kg/cm2G (R-22 model) or
28.1kg/cm2G (R-410A model) with dry nitrogen gas and close the cylinder valve
when the gauge reading reaches
17.6kg/cm2G (R-22model) or
28.1kg/cm2G (R-410A model). Next step
is leak test with liquid soap.
!
- With a service valve wrench, turn the valve of
liquid side counter-clockwise to fully open the
valve
- Turn the valve of gas side counter clockwise to
fully open the valve
- Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.
- 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.
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open Close
Finishing the Job
- Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum pump.
- Replace the pipe cover to the outdoor unit by
one screw
Now the air conditioner is ready for test run.
* The feature can be changed according to a type
of model.
Operate the unit for 15~20 minutes, then
check the system refrigerant charge:
- Measure the pressure of the gas side service
valve.
- Measure the air temperature from inlet and
outlet of air conditiioner.
- Ensure the difference between the inlet and
outlet temperature is more than 8°C.
- For reference; the gas side pressure at optimum condition is shown on table (cooling)
The air conditioner is now ready to use.
*The feature can be changed according to a type
of model.
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.
- Connect a low-pressure gauge manifold hose
to the charge port on the gas side service
valve.
- Open the gas side service valve halfway and
purge the air in the manifold hose using the
refrigerant.
- Close the liquid side service valve(all the
way).
- Turn on the unit's operating switch and start
the cooling operation.
- 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.
Discharge
temperature
Discharge
air
Inlet temperature
NOTE
!
If the actual pressure is higher than
shown, the system is most likely overcharged, and charge should be removed.
If the actual pressure are lower than
shown, the system is most likely undercharged, and charge should be added.
CAUTION
Be sure to perform Pump Down procedure in the cooling mode.
!
Pump Down Procedure
Pump downEvaluation of the performance
Refrigerant
Outside ambi-
ent TEMP.
The pressure of
the gas side
R-22 35°C (95°F)
4~5kg/cm2G
(56.8~71.0
P.S.I.G.)
R-410A 35°C (95°F)
8.5~9.5kg/cm2G
(120~135 P.S.I.G.)
2 Do not make drain piping like the following.
* The feature can be changed according to a
type of model.
Do not raise
Water
leakage
Accumulated
drain water
Air
Waving
Water
leakage
Tip of drain hose
dipped in water
Water
leakage
Ditch
Less than
50mm gap
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.
Trap is required to prevent water
from entering into electrical parts.
Taping
Saddle
Drain hose
Pipings
Connecting cable
Seal a small opening
around the pipings
with gum type sealant.
Drain hose
Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
- 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.
- 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.
*The feature can be changed according to a
type of model.
- Remove the caps from the 2-way and 3-way
valves.
- Remove the service-port cap from the 3-way
valve.
- 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.
- If bubbles come out, the pipes have leakage
- 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.
- When the desired vacuum is reached, close
the knob of the 3-way valve and stop the
vacuum pump.
Evacuation
Lo Hi
Indoor unit
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Pressure
gauge
Liquid side
Outdoor unit Outdoor unit Outdoor unit
Cap
Gas side
3-way valve3-way valve
(Open)(Open)
2-way valve2-way valve
(Close)(Close)
3-way valve
(Close)
2-way valve
(Close)
Required time for evacuation when 30 gal/h
vacuum pump is used
If tubing length is
less than 10m (33 ft)
If tubing length is
longer than 10m (33
ft)
10 min. or more 15 min. or more
Soap water method
Test Running
- Check that all tubing and wiring are properly
connected.
- Check that the gas and liquid side service
valves are fully open.
Prepare remote controller
1 Remove the battery cover by pulling it ac-
cording 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.
NOTE
!
- 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
- Fix the outdoor unit with a bolt and
nut(ø10mm) 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.
- If the vibration of the unit is transmitted to
the pipe, secure the unit with an anti-vibration rubber.
Settlement of outdoor unit
Bolt
Tubing connection
98 10 11
Note - Memo -
1312
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