CONNECT SERIES SERVICE MANUAL
37
ENGLISH
Maintenance
Model Time(min)
AUH2436ZGDA 35
AUH4860ZGDA 40
NOTICE:
• Make sure the outlet of vacuum pump is away from fire source and is well-ventilated.
• Before evacuating, make sure the unit cut-o valves are closed.
• When evacuating, both the liquid pipe and the gas pipe must be evacuated.
System Diagram
System Evacuation
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:
Verify if the pressure gauge at the low pressure side of the manifold valve assembly reads 350 microns, if
not, it indicates there is leak somewhere. Then, close the valves fully and then stop the vacuum pump.
6. Wait for 10min to see if the system pressure can remain unchanged. If the pressure increase, there may be
leakage.
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