Gree GWH09MA-K3NNA3F Service Manual page 37

Air Purging and Leakage Test
1. Connect charging hose of manifold valve to charge end of low pressure
valve (both high/low pressure valves must be tightly shut).
2. Connect joint of charging hose to vacuum pump.
3. Fully open the handle of Lo manifold valve.
4. Open the vacuum pump to evacuate. At the beginning, slightly
loosen joint nut of low pressure valve to check if there
is air coming inside. (If noise of vacuum pump has
been changed, the reading of multimeter is 0) Then
tighten the nut.
5. Keep evacuating for more than 15mins and make
sure the reading of multi-meter is-1.0 X10 pa
(-76cmHg).
6. Fully open high/low pressure valves.
7. Remove charging hose from charging end of low pressure valve.
8. Tighten bonnet of low pressure valve. (As shown in Fig.10)
Outdoor Condensation Drainage (only for Heat pump type )
During heating operation, the condensing water and defrosting
water should be drained out reliably through the drain hose.
Install the outdoor drain connector in a
the base plate and attach the drain hose to the connector,
so that the waste water formed in the outdoor unit can be
drained out satisfactorily.
34
5
25 hole on the
Installation Manual
Liquid pipe
Gas pipe
Valve
cap
Vacuum pump
Fig.10
Chasis
Outdoor drain connector
Vacuum
gauge