GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
64
Model Time(min)
GUD24W2/D-D(U)
GUD30W2/D-D(U)
30
GUD36W2/D-D(U)
GUD42W2/D-D(U)
GUD48W2/D-D(U)
GUD60W2/D-D(U)
45
And verify if the pressure gauge at the low pressure side of the manifold valve assembly reads -0.1Mpa
(-750mmHg), if not, it indicates there is leak somewhere. Then, close the switch fully and then stop the vacuum
pump.
(6) Wait for 10min to see if the system pressure can remain unchanged. During this time, the reading of the
pressure gauge at the low pressure side can not be larger than 0.005MPa.
(7) Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the pressure
inside and outside of the connection pipe, so that air will not come into the connection pipe when removing
the hose. Notice that the gas and liquid valve can be opened fully only after the manifold valve assembly is
removed.
(8) Place back the caps of the liquid valve, gas valve and also the service port.
NOTICE:
For large-size units, there are maintenance ports for liquid valve and gas valve. During evacuation, you may
connect the two hoses of the branch valve assembly to the maintenance ports to speed up the evacuation.
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