LG AMNH076LQL0 Service Manual page 203

(2) Evacuation
(All amount of refrigerant leaked)
Vacuum pump
• Procedure
1. Confirm that both the liguid side valve and gas
side valve are set to the opened position.
2. Connect the vaccum pump to the center hose of
the manifold gauge.
3. Connect the service port of the gas side valve to
the low side of the gauge.
4. Evacuation for approximately one hour.
- Confirm that the gauge needle has moved
toward-76 cmHg (vacuum of 4 mmHg or less).
5. Close the Low handle of the gauge turn off the
vacuum pump, and confirm that the gauge needle
does not move(approximately 5 minutes after
turning off the vacuum pump).
Liquid side
Indoor unit
Gas side
Liquid side
Indoor unit
Gas side
manifold gauge
Low-
handle
Hi- handle
(OPEN)
(OPEN)
Outdoor unit
Open
2-Way
valve
Open
3-Way
valve
Open
2-Way
valve
Open
3-Way
valve
6. Disconnect the charge hose from the vacuum
pump.
- Vacuum pump oil.
If the vacuum pump oil becomes dirty or deplet-
ed,replenish as needed.
7. Mount the valve caps and the service port caps.
(3-way) Valve
Service Manual 203