Air Purging And Leakage Test - Gree GWC36LB-D1NNA2A/I Service Manual

Installation Manual

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 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
(-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.5)
Leak hunting
Use soap water or leak hunting meter to check whether
the joints is leak.
Outdoor condensation drainage (Heat pump type only)
When the unit is heating, the condensing water
and defrosting water can be drained out reliably
through the drain hose.
Installation: Install the outdoor drain elbow in
25 hole on the base plate, and joint the
Ø
drain hose to the elbow, so that the wastewater
formed in the outdoor unit can be drained out
to a proper place.
5
-1.0 10 pa
Indoor unit check point
Outdoor unit check point
Liquid pipe
Vacuum
Gas pipe
Valve
cap
Vacuum pump
Fig.
Fig.6
Chasis
Outdoor drain
elbow
gauge
29