LG LMU240HE Service Manual - Page 78

Multi type Air Conditioner, way, 3-way Valve

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2-way, 3-way Valve (2) Evacuation (All amount of refrigerant leaked) Indoor unit Liquid side Open 2-Way valve Gas side Open 3-Way valve Outdoor unit Indoor unit Liquid side Open 2-Way valve Gas side Open 3-Way valve manifold gauge Vacuum pump Lowhandle (OPEN) Hi- handle (OPEN) • 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). 6. Disconnect the charge hose from the vacuum pump. - Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted,replenish as needed. 7. Mount the valve caps and the service port caps. 78 Multi type Air Conditioner

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78
Multi type Air Conditioner
2-way, 3-way Valve
(2) Evacuation
(All amount of refrigerant leaked)
• 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).
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.
Indoor unit
Outdoor unit
Liquid side
Open
Gas side
2-Way
valve
Open
3-Way
valve
manifold gauge
Indoor unit
Liquid side
Open
Gas side
2-Way
valve
Open
3-Way
valve
Vacuum pump
Hi- handle
(OPEN)
Low-
handle
(OPEN)