Pipes: Gas Side; Liquid Side; Air Purging Of The Connecting Pipes And The Indoor Unit - LG 18K BTU Anleitung

7. Air Purging of the Connecting Pipes and the Indoor Unit

The air which contains moisture remaining
in the refrigeration cycle may cause a
malfunction on the compressor.
1. Remove the caps from the gas side and
liquid side valves.
2. Remove the service-port cap from the gas
side valve.
3. Turn the valve stem of liquid side valve
counterclockwise approx. 90° and hold it
there for ten 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. Use vacuum
pump as far as possible.
No leakage found
5. To open liquid side valve again, turn the valve
stem counterclockwise until it stops.
6. To purge the air, push the pin on the service port
of gas side valve for three seconds with a
hexagonal wrench and set it free for one minute.
Repeat this three times.
7. Set the both liquid and gas side valves to open position with the hexagonal
wrench for the unit operation.
NOTE:
The additional gas for air purging 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.
CAUTION : Do not leak the gas in the air during air purging.
Outdoor unit
3-way valve
(Close)
2-way valve or
3-way valve
(open)
Result
• Re-tighten the connecting portion with torque
wrenches.
leakage ceased
18
Cover control
Gas side
To indoor unit

Liquid side

Hexagonal
wrench
Cap
Service port cap
leakage found
leakage persists
Repair
leakage ceased