LG LS-J0960NL Service Manual ▷ View online
Installation
1. Installation of indoor, Outdoor unit
-23-
More than 5cm
More than 5cm
More than 2.3m
More than 5cm
More than 10cm
More than 10cm
More
than 60cm
than 60cm
More than 60cm
More than 70cm
1) Select the best location
1. Indoor unit
Do not have any heat or steam near the unit.
Select a place where there are no obstacles in
front of the unit.
Make sure that condensation drainage can be
conveniently routed away.
Do not install near a doorway.
Ensure that the space around the left and right of
the unit is more than 5cm. The unit should be
installed as high on the wall as possible, allowing
a minimum of 5cm from ceiling.
Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
Select a place where there are no obstacles in
front of the unit.
Make sure that condensation drainage can be
conveniently routed away.
Do not install near a doorway.
Ensure that the space around the left and right of
the unit is more than 5cm. The unit should be
installed as high on the wall as possible, allowing
a minimum of 5cm from ceiling.
Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
2. 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 10cm. The front of the unit should
have more than 70cm of space.
Do not place animals and plants in the path of the
warm air.
Take the air conditioner weight into account and
select a place where noise and vibration are
minimum.
Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
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 10cm. The front of the unit should
have more than 70cm of space.
Do not place animals and plants in the path of the
warm air.
Take the air conditioner weight into account and
select a place where noise and vibration are
minimum.
Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
from the floors more than 2.3 meters.
CAUTION
2) Piping length and elevation
9K, 12K
1/2" 1/4"
5
7
15
20
Pipe Size
Capacity
(Btu/h)
GAS LIQUID
Max.
length
A
(m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B
(m)
Standard
Length
(m)
* Both gas and liquid interconnecting pipes must be
insulated as a pair, but it is not necessary to
individually insulate them.
individually insulate them.
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
In case more than 5m
• Capacity is based on standard length and maximum
allowance length is on the basis of reliability.
• Oil trap should be installed every 5~7 meters.
CAUTION
-32-
4. Checking the Drainage and Forming the Pipings
2) Form the piping
1. Form the piping by wrapping the connecting
portion of the indoor unit with insulation material
and secure it with two kinds of vinyl tapes.
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.
the end of the drain outlet should be routed
above the ground. Secure the drain hose
appropriately.
2. In cases where the outdoor unit is installed below
the indoor unit perform the following.
Tape the piping, drain hose and connecting cable
from down to up.
Secure the tapped piping along the exterior wall
using saddle or equivalent.
from down to up.
Secure the tapped piping along the exterior wall
using saddle or equivalent.
,
,
Trap is required to prevent water
from entering into electrical parts.
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealer.
around pipings with a
gum type sealer.
Taping
Drain
hose
hose
Pipings
Connecting
cable
cable
3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
Tape the piping and connecting cable from down
to up.
Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or
equivalent.
to up.
Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or
equivalent.
,,
,,
,,
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
Trap
1) Checking the drainage
1. To remove the front panel from the indoor unit,
remove the front panel from the indoor unit
cabinet.
cabinet.
Set the air direction louvers up-and-down to the
position(horizontally) by hand.
Remove the securing screws that retain the front
panel. Pull the lower left and right sides of the
grille toward you and lift it off.
(9K Btu models: 2EA,
12K Btu models: 3EA)
position(horizontally) by hand.
Remove the securing screws that retain the front
panel. Pull the lower left and right sides of the
grille toward you and lift it off.
(9K Btu models: 2EA,
12K Btu models: 3EA)
Pull the right and
the left side.
the left side.
Screw
2. To check the drainage.
Pour a glass of water
on the evaporator.
Ensure the water flows
through the drain hose
of the indoor unit
without any leakage
and goes out the drain
on the evaporator.
Ensure the water flows
through the drain hose
of the indoor unit
without any leakage
and goes out the drain
3. Drain piping
The drain hose should point downward for easy
drain flow.
drain flow.
Do not make drain piping.
Downward slope
Do not raise
Accumulated
drain water
drain water
Tip of drain hose
dipped in water
dipped in water
Air
Waving
Water
leakage
leakage
Water
leakage
leakage
Ditch
Less than
50mm gap
50mm gap
Water
leakage
leakage
-33-
1) Air purging
Air and moisture remaining in the refrigerant system
have undesirable effects as indicated below.
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.
Operating current rises.
Cooling(or heating) efficiency drops.
Moisture in the refrigerant circuit may freeze and
block capillary tubing.
Water may lead to corrosion of parts in the
refrigeration system.
Therefore, the indoor unit and tubing between the
indoor and outdoor unit must be leak tested and
evacuated to remove any noncondensables and
moisture from the system.
indoor and outdoor unit must be leak tested and
evacuated to remove any noncondensables and
moisture from the system.
2) 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
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.
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.
gauges) and dry nitrogen gas cylinder to this
service port with charge hoses.
Pressurize the system to no more than 150
P.S.I.G. with dry nitrogen gas and close the
cylinder valve when the gauge reading reached
150 P.S.I.G. Next, test for leaks with liquid soap.
P.S.I.G. with dry nitrogen gas and close the
cylinder valve when the gauge reading reached
150 P.S.I.G. Next, test for leaks with liquid soap.
Lo Hi
Indoor unit
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
cylinder(in vertical
standing position)
Pressure
gauge
gauge
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.
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.
Be sure to use a manifold valve for air purging.
If it is not available, use a stop valve for this purpose.
The "Hi" knob of the manifold valve must always be
kept close.
If it is not available, use a stop valve for this purpose.
The "Hi" knob of the manifold valve must always be
kept close.
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.
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.
CAUTION
CAUTION
5. Air Purging
-34-
3. Evacuation
Connect the charge hose end described in the
preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.
The following table shows the time required for
evacuation.
preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
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
"Lo" knob of the manifold valve and stop the
vacuum pump.
"Lo" knob of the manifold valve and stop the
vacuum pump.
4. Finishing the job
With a service valve wrench, turn the valve stem
of liquid side valve counter-clockwise to fully
open the valve.
Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
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.
Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
of liquid side valve counter-clockwise to fully
open the valve.
Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
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.
Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.
The air conditioner is now ready to test run.
(1) Remove the caps from the 2-way and 3-way valves.
(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve turn the valve stem
(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve turn the valve stem
counterclockwise approximately 90°, wait for about 2~3
sec, and close it.
sec, and close it.
(4) Apply a soap water or a liquid neutral detergent on the
indoor unit connection or outdoor unit connections by a
soft brush to check for leakage of the connecting points
of the piping.
soft brush to check for leakage of the connecting points
of the piping.
(5) If bubbles come out, the pipes have leakage.
Soap water method
Control
cover
cover
Liquid side
(Smaller diameter)
(Smaller diameter)
Gas side
(Bigger diameter)
(Bigger diameter)
2-way valve
(open)
(open)
3-way valve
(close)
(close)
Cap
Service port cap
Hexagonal wrench
Terminal block
(pillar terminal)
(pillar terminal)
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
gauge
Open
Close