GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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⑥ After a required amount of lubricant is added, close the oil checking valve to ensure tightness.
Note:
Lubricant is of great importance to the normal running of compressors. You should follow
Gree’s requirement to add qualified lubricant of the specified trademark and ensure properness of fill
amount.
Step 14: Vacuum-pump.
After lubricant is added, keep on extracting air through a vacuum pump till the internal pressure
reaches the absolute pressure 0 kgf/cm
2
and the pressure gauge reads -1 kgf/cm
2
. This is to ensure that
moistures inside the pipeline system are completely vaporized.
Vacuum pumps of the specifications below are recommended:
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