LG LS-J0761CL Service Manual ▷ View online
-32-
Plastic band
Taping
Drain hose
Pipings
Connecting
cable
cable
• Trap is required to prevent the electrical
parts from entering the water.
parts from entering the water.
Trap
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
3) Form the piping
1. Wrap the connecting portion of indoor unit with
the Insulation material and secure it with two
Plastic Bands.(for the right piping)
Plastic Bands.(for the right piping)
• If you want to connect an additional drain hose,
the end of the drain-outlet should be off the
ground.(Do not dip it into water, and fix it on the
wall to avoid swinging in the wind.)
ground.(Do not dip it into water, and fix it on the
wall to avoid swinging in the wind.)
2. Tape the Piping, drain hose and Connecting
Cable from down to up.
3. Form the piping gathered by taping along the
exterior wall and fix it onto the wall by saddle or
equivalent.
equivalent.
2. Tape the Pipings and Connecting cable from
down to up.
3. Form the pipings gathered by taping along the
exterior wall, make the Trap to be required to
prevent the room from entering the water.
prevent the room from entering the water.
4. Fix the pipings onto the wall by saddle or equiv-
alent.
In case of the Outdoor unit to be installed
below the position of the Indoor unit.
below the position of the Indoor unit.
In case of the Outdoor unit being installed
upper position of the Indoor unit.
upper position of the Indoor unit.
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Gas side
Liquid side
Cap
Hexagonal
wrench
wrench
2-way valve
(Open)
3-way valve
(Close)
No leakage found
Leakage found
• Re-tighten the connecting portion with torque
wrenches.
wrenches.
Leakage ceased
Leakage persists
Leakage ceased
Repair
Result
5. To open 2-way valve again, turn the valve
stem counter-clockwise until it stops.
Terminal block
(pillar terminal)
6. To purge the air, push the pin on the service port of 3-
way valve for three seconds with a hexagonal wrench
and set it free for one minute.
and set it free for one minute.
7. Set both liquid and gas side valves to open
position with the Hexagonal wrench for the
unit operation.
unit operation.
5. Air Purging of the Piping and Indoor Unit
1) Air purging
The air remaining which contains moisture in the
refrigeration cycle may cause a malfunction on the
compressor.
refrigeration cycle may cause a malfunction on the
compressor.
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 valve, turn the valve stem of 2-way
valve counter-clockwise approx. 90
¡˘
and hold it
there for five seconds, then close it.
4. Check a gas-leakage of the connecting portion of
the pipings.
CAUTION: Do not leak the gas in the air during
air purging, with vacuum pump as
possible as you can.
possible as you can.
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8. Checking a gas leakage
(1) Connect the manifold gauge to the service port of 3-way valve.
Measure the pressure.
(2) Keep it for 5-10 minutes.
Ensure if the pressure indicated on the gauge is as same as that of measured at first time.
Liquid side
Gas side
CLOSE
CLOSE
Indoor unit
Outdoor unit
Closed
Closed
NOTE:
The additional gas for air purping has been charged in the outdoor unit.
However, if the flare connections have not been done correctly and there gas leaks, a gas cylinder and the charge
set will be needed.
set will be needed.
CAUTION : Do not leak the gas in the air during air purging. Use vaccum pump as far as possible
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A
A
B
Oil trap
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
B
6. Pipe length and the elevation
• Capicity is based on standard length and maximum allowance length is the basis of reliability.
• Oil trap should be installed per 5~7 meters.
• Numerical value in "( )" is for Rotary Comp. model.
CAUTION
In case more than 5m
Max. Piping
Length
£
(m)
Capacity
(Btu/h)
7~12K
15
7
5
20
Max.
Elevation
£
(m)
Standard
Length(m)
Additional Refrig-
erant
(g/m)
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