Gree GMV-224WM/G-X Owner's Manual page 41

the joint and open the refrigerant tank valve.
Step 4: If the refrigerant tank itself does not have a siphon, then the refrigerant tank needs to be
inverted and placed on the electronic scale to record the current weight of m1; if the refrigerant tank
itself has a siphon, the refrigerant tank should be kept in an upright state, and record the current weight
of m1.
Step 5: Open the high pressure gauge valve (the low pressure gauge valve remains closed),
charge the system with refrigerant, and record the weight change of the refrigerant tank.
Step 6: When refrigerant tank is over and the refrigerant can't be charged to the system any more,
record the current weight of m2.
Fig.3.7.1
Fig.3.7.2
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GMV DC Inverter VRF