Vacuum Pump - LG LS-K1820CL Manual

3. Evacuation
(All amount of refrigerant leaked)

Vacuum pump

• Procedure
(1) Connect the vacuum pump to the center hose of
charge set center hose
(2) Evacuation for approximately one hour.
- Confirm that the gauge needle has moved
toward -76cmHg (vacuum of 4 mmHg or less).
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Only for training and service purposes
Liquid side
Indoor unit
Lo
OPEN
CLOSE
2-Way
valve
Open
Gas side
3-Way
valve
Open
(3) Close the valve (Lo side) on the charge set, turn off
the vacuum pump, and confirm that the gauge nee-
dle does not move (approximately 5 minutes after
turning off the vacuum pump).
(4) Disconnect the charge hose from the vacuum
pump.
- Vacuum pump oil.
If the vacuum pump oil becomes dirty or depleted,
replenish as needed.
- 56 -
Outdoor unit
LGE Internal Use Only