Connection Pipe Vacuum Pumping - Gree GUD24W2/D-D(U) Service Manual

GREE
Model: GUD42W2/D-D(U), GUD48W2/D-D(U), GUD60W2/D-D(U)

4.2 Connection Pipe Vacuum Pumping

Make sure the outlet of vacuum pump is away from fire source and is well-ventilated.
①
Before vacuum pumping, make sure the unit cut-off valves are closed.
②
(1) Remove the caps of the liquid valve, gas valve and also the service port.
(2) meanwhile the gas and liquid valves should be kept closed in case of refrigerant leak.
(3) Connect the hose used for evacuation to the vacuum pump.
(4) Open the switch at the lower pressure side of the manifold valve assembly and start the vacuum pump.
Meanwhile, the switch at the high pressure side of the manifold valve assembly should be kept closed,
otherwise evacuation would fail.
(5) The evacuation duration depends on the unit's capacity, generally.
DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
NOTICE
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