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In cases where the outdoor unit is installed
Air purging with vacuum pump
above the Indoor unit perform the following.
1
Tape the piping and connecting cable from
- Preparation
down to up.
Check that each tube(both liquid and gas
2
Secure the taped piping along the exterior
side tubes) between the indoor and outdoor
wall. Form a trap to prevent water entering
units have been properly connected and all
the room.
wiring for the test run has been completed.
3
Fix the piping onto the wall using saddle or
Remove the service valve caps from both
equivalent
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
Seal a small opening
kept closed at this stage.
around the pipings
- Leak test
with gum type sealant.
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
Trap
!
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 3-
way valve must always be kept close.
- Pressurize the system to not more than
Trap
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.
*The feature can be changed according a type
of model.
!
CAUTION
Air Purging
To avoid nitrogen entering the refrigerant
system in a liquid state, the top of the
The air and moisture remaining in the refriger-
cylinder must be higher than its bottom
ant system have undesirable effects as indi-
when you pressurize the system. Usually,
cated below.
the cylinder is used in a vertical standing
- Pressure in the system rises.
position.
- Operating current rises.
- Cooling(or heating) efficiency drops.
- Moisture in the refrigerant circuit may freeze
!
WARNING
and block capillary tubing.
- Water may lead to corrosion of parts in the
There is a risk of fire and explo-
refrigeration system.
sion.
- Inert gas (nitrogen) should be
Therefore, after evacuating the system, take a
used when you check plumbing
leak test for the piping and tubing between
leaks, cleaning or repairs of pipes etc.
the indoor and outdoor unit.
If you are using combustible gases includ-
ing oxygen, product may have the risk of
fires and explosions.
- Do a leak test of all joints of the tubing(both
Evacuation
indoor and outdoor) and both gas and liquid
side service valves.
- Connect the charge hose end described in
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
- After the system is found to be free of leaks,
Confirm the "Lo" knob of the pressure Gauge
relieve the nitrogen pressure by loosening
is open. Then, run the vacuum pump.
the charge hose connector at the nitrogen
The operation time for evacuation varies with
cylinder. When the system pressure is re-
tubing length and capacity of the pump. The
duced to normal, disconnect the hose from
following table shows the time required for
the cylinder.
evacuation.
Manifold valve
Outdoor unit
Indoor unit
Pressure
gauge
Gas side
Lo
Hi
3-way valve
Charge hose
Liquid side
3-way or
Nitrogen gas
2-way valve
cylinder(in vertical
standing position)
Outdoor unit
*The feature can be changed according to a
type of model.
Required time for evacuation when 30 gal/h
Soap water method
vacuum pump is used
If tubing length is
If tubing length is
- Remove the caps from the 2-way and 3-way
longer than 10m (33
less than 10m (33 ft)
valves.
ft)
- Remove the service-port cap from the 3-way
10 min. or more
15 min. or more
valve.
- Apply a soap water or a liquid neutral deter-
- When the desired vacuum is reached, close
gent on the indoor unit connection or out-
the knob of the 3-way valve and stop the
door unit connections by a soft brush to
vacuum pump.
check for leakage of the connecting points of
the piping.
- If bubbles come out, the pipes have leakage
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.
- With a service valve wrench, turn the valve of
- Replace the pipe cover to the outdoor unit by
liquid side counter-clockwise to fully open the
one screw
valve
Now the air conditioner is ready for test run.
- Turn the valve of gas side counter clockwise to
* The feature can be changed according to a type
fully open the valve
of model.
- 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
Installation of filters
side service port and fasten the flare nut se-
curely with an adjustable wrench. This process
1
Detach two nitto tapes from the plasma fil-
is very important to prevent leakage from the
ter.
system.
Indoor unit
* The feature can be changed according to a
type of model.
Outdoor unit
Manifold valve
Pressure
Lo Hi
gauge
Open
Close
Vacuum pump
Test Running
Settlement of outdoor unit
- Check that all tubing and wiring are properly
connected.
- Fix the outdoor unit with a bolt and
- Check that the gas and liquid side service
nut(ø10mm) tightly and horizontally on a con-
valves are fully open.
crete or rigid mount.
- When installing on the wall, roof or rooftop,
anchor the mounting base securely with a
Prepare remote controller
nail or wire assuming the influence of wind
and earthquake.
1
Remove the battery cover by pulling it ac-
cording to the arrow direction.
- If the vibration of the unit is transmitted to
2
the pipe, secure the unit with an anti-vibra-
Insert new batteries making sure that the
tion rubber.
(+) and (–) of battery are installed correctly.
3
Reattach the cover by pushing it back into
position.
Bolt
Cap
!
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
8
Evaluation of the performance
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 opti-
mum condition is shown on table (cooling)
The air conditioner is now ready to use.
Inlet temperature
Discharge air
Plasmaster filter
Discharge
temperature
Outside ambi-
The pressure of
Refrigerant
ent TEMP.
the gas side
2
8.5~9.5kg/cm
G(1
R-410A
35°C
20~135 P.S.I.G.)
*The feature can be changed according to a type
of model.
!
NOTE
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 under-
charged, and charge should be added.
Installation guide at the seaside
!
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.
Selecting the location(Outdoor Unit)
Tubing connection
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
In case, to install the outdoor unit on the sea-
side, set up a windbreak not to be exposed to
the sea wind.
9
Piping Length and Elevation
Pump down
This is performed when the unit is relocated
Capacity
or the refrigerant circuit is serviced.
GAS
(W)
Pump Down means collecting all refrigerant
mm
into the outdoor unit without the loss of refrig-
erant.
2.5k, 3.5k
Ø9.52
!
CAUTION
Indoor unit
Be sure to perform Pump Down proce-
dure in the cooling mode.
Pump Down Procedure
- 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
!
CAUTION
way).
Capacity is based on standard length and maximum allowable length is on the basis of relia-
- Turn on the unit's operating switch and start
bility.
the cooling operation.
Additional refrigerant must be charged after 12.5 m (there is no need to charge till 12.5 m
- When the low-pressure gauge reading be-
based on reliability)
2
comes 1 to 0.5kg/cm
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.
Operation ranges
The table below indicates the temperature ranges the air conditioner can be Operated within.
Mode
Cooling
Heating
Windbreak
Sea wind
- 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.
Select a well-drained place.
!
NOTE
- If you can't meet above guide line in
the seaside installation, please con-
tact 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
10
Pipe Size
Standard
Max.
Max.
Additional Re-
Length
frigerant (g/m)
LIQUID
Length
Elevation
Ⓐ (m)
Ⓑ (m)
(m)
(after 12.5 m)
inch
mm
inch
3/8
Ø6.35
1/4
7.5
20
10
20
Outdoor unit
A
A
B
Indoor unit
Outdoor unit
B
Indoor temperature
Outdoor temperature
-10°C~48°C(14°F~118.4°F)
-10°C~48°C(14°F~118.4°F)
-10°C~24°C(14.0°F~75.2°F)
-10°C~24°C(14.0°F~75.2°F)
11
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