Vacuum Drying Of The Connecting Pipes And The Indoor Unit - LG 20k Installation Manual

Floor standing type air conditioner
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Vacuum Drying 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. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service
port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -
76cmHg.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon
wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
Indoor unit
Vaccum pump
Liquid side
Gas side
OPEN
CLOSE
Closed
2-way valve/
3-way valve
3-way
valve
Closed
Installation of Unit
Outdoor unit
Installation Manual 17

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