Air Purging And Refrigerant Charge - Gree GMV Series Owner's Manual

GMV DC Inverter VRF
2) For heat pump unit, liquid pipe should bear 70℃ or above, and gas pipe should bear
120℃ or above. For cooling only unit,both liquid pipe and gas pipe should bear 70℃
or above. Example: Polyethylene foam can bear 120℃ above and foaming
polyethylene can bear 100℃ above.
3) Joints at indoor and outdoor units should be wrapped with insulating material and
leave no clearance between pipe and wall. See Fig.32.
4) Manifold attached foam can not be taken as insulating material.
5) When wrapping the tape, the later circle should cover half of the former one. Don't
wrap the tape so tightly, otherwise the insulation effect will be weakened.
6) After wrapping the pipe, adopt sealing material to completely fill the hole so as to
prevent wind and rain from entering the room.
4.3.4 Support and protection for pipeline
(1) Support should be made for hanging connection pipe. Distance between each support
can not be over 1m.
(2) Protection towards accidental damage should be made for outdoor pipeline. When the
pipeline exceeds 1m, a pinch board should be added for protection.

4.4 Air Purging and Refrigerant Charge

4.4.1 Air purging
(1) Confirm outdoor liquid and gas valves are closed. Air puring from the nozzel located on
liquid and gas valves by vacuum pump.See Fig.33.
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Fig.32
Fig.33
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