LG LS-J0761NL Service Manual page 49

1) Re-air purging
(Re-installation)
Indoor unit
Gas cylinder
R22
• Procedure
(1) Confirm that both the 2-way valve and the 3-
way valve are set to the closed position.
(2) Connect the charge set and a gas cylinder to
the service port of the 3-way valve.
– Leave the valve on the gas cylinder closed.
(3) Air purging.
– Open the valves on the gas cylinder and the
charge set. Purge the air by loosening the
flare nut on the 2-way valve approximately
45° for 3 seconds then closing it for 1 minute;
repeat 3 times.
– After purging the air, use a torque wrench to
tighten the flare nut on the 2-way valve.
(4) Check for gas leakage.
– Check the flare connections for gas leakage.
(5) Discharge the refrigerant.
– Close the valve on the gas cylinder and
discharge the refrigerant until the gauge
indicates 3 to 5 kg/cm
(6) Disconnect the charge set and the gas
cylinder, and set the 2-way and 3-way valves
to the open position.
Liquid side
Gas side
Lo
OPEN CLOSE
2 g.
Closed
2-Way
valve
Closed
3-Way
valve
– Be sure to use a hexagonal wrench to
operate the valve stems.
(7) Mount the valve stem nuts and the service
port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
* CAUTION:
Do not leak the gas in the air during Air Purging.
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Outdoor unit