Forming the Piping
Form the piping by wrapping the connecting
portion of the indoor unit with insulation mate-
rial and secure it with two kinds of vinyl tapes.
1 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.
Taping
Saddle
Drain hose
Pipings
Connecting cable
Seal a small opening
around the pipings
with gum type sealant.
Trap is required to prevent water
from entering into electrical parts.
Drain hose
Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
2 Do not make drain piping like the
following.
* The feature can be changed according to
type of model.
Installing drain piping of the
outdoor unit
Depending on installation site, it may be
required to install drain plug for drainage
(Supplied with the unit). In cold areas, do not
use a drain hose with the outdoor unit.
Otherwise, drain water may freeze, impairing
the heating performance.
1 See the figure below for installation of the
drain plug.
A Drain nipple
B Drain cap
C Drain washer
2 Connect a field supplied vinyl hose to the
drain nipple (A). If the hose is too long and
hangs down, fix it carefully to prevent
kinks.
Do not
raise
Water
leakage
Water
leakage
Ditch
Accumulated
drain water
Air
Waving
Water
leakage
Less than
50mm gap
Tip of drain
hose dipped
in water
B B
B
B
B
B
B
A
C
- 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
Cap
Gas side
Liquid side
3-way valve
(Close)
2-way valve
(Close)
Required time for evacuation when 30 gal/h
(113.4 l/h) vacuum pump is used
If tubing length is less
than 10 m (33 ft)
If tubing length is
longer than 10 m (33 ft)
10 min. or more
15 min. or more
Soap water method
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.
* The feature can be changed according to a type
of model.
Discharge
temperature
Discharge air
Inlet temperature
Refrigerant
Outside ambi-
ent TEMP.
The pressure of the
gas side
R-22
35°C (95°F)
4
~
5kg/cm
2
G
(56.8
~
71.0 P.S.I.G.)
R-410A
35°C (95°F)
8.5
~
9.5kg/cm
2
G
(120
~
135 P.S.I.G.)
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.
Evaluation of the performance
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 refrig-
erant.
- 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 be-
comes 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.
CAUTION
Be sure to perform Pump Down proce-
dure in the cooling mode.
!
Pump Down Procedure
Pump down
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.
In case, to install the outdoor unit on the sea-
side, set up a windbreak not to be exposed to
the sea wind.
Select a well-drained place.
- If you can’t meet above guide line in the
seaside installation, please contact LG
Electronics for the additional anticorro-
sion.
- 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.
- 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
Installation guide at the seaside
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
3-way valve must always be kept close.
- Pressurize the system to maximum 17.6
kg/cm
2
G (R-22 model) or 28.1 kg/cm
2
G
(R-410A model) with dry nitrogen gas
and close the cylinder valve when the
gauge reading reaches 17.6 kg/cm
2
G
(R-22model) or 28.1 kg/cm
2
G (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 se-
curely 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.
- 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.
- Fix the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a con-
crete 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-vibra-
tion rubber.
Settlement of outdoor unit
Outdoor unit
Indoor unit
Lo
Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open
Close
Bolt
Tubing connection
Finishing the Job
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(1.5 V) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote
controller if the system is not used for a
long time
Installation of 3M filter
1 Pull out the 3M filter from the separately
packed plastic bag.
2 Open the front panel.
- Lift up both sides of the panel slightly.
3 Hold the knob of the Air filter, lift it up
slightly and remove it from the unit.
4 Insert the 3M filter.
5 Insert the air filter.
6 Close the front panel.
- Push down both sides of the panel
slightly.
Air filter
3M filter
* The feature can be changed according to
type of model.
Clicking
Sound
Piping Length and Elevation
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
CAUTION
Capacity is based on standard length and maximum allowable length is on the basis of relia-
bility.
Additional refrigerant must be charged after 12.5m.
!
Operation ranges
The table below indicates the temperature ranges the air conditioner can be Operated within.
Capacity
(kW)
Pipe Size
Standard
Length
(m)
Max.
Length
Ⓐ
(m)
Max.
Elevation
Ⓑ
(m)
Additional
Refrigerant
(g/m)
GAS
LIQUID
mm
inch
mm
inch
2.5~3.5
Ø9.52
3/8
Ø6.35
1/4
7.5
20
10
20
Mode
Indoor temperature
Outdoor temperature
Cooling
18°C ~ 32°C
-10°C ~ 48°C
Heating
16°C ~ 30°C
-15°C ~ 24°C
9
8
10
11
13
12
14
15
- Note (Memo) -
