Gree GMVVQ1015WM/C-X, Руководство по обслуживанию

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Gree GMV6 HR DC Inverter VRF Units Service Manual
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3.2 Refrigerant Charging Method
Refrigerant charging for multi VRF unit includes two parts: pre-charging and start-up charging.
3.2.1 Pre-charging of refrigerant.
Step 1: Connect the high pressure gauge pipe of pressure gauge 1 to the detection opening of the
high pressure gas valve, the low pressure gauge pipe to the detection opening of the low pressure gas
valve, and the medium gauge pipe to vacuum pump 1; then connect the high pressure gauge pipe of
pressure gauge 2 to the detection opening of the liquid valve, close the low pressure gauge pipe, and
connect the medium gauge pipe to vacuum pump 2.
Step 2: Once vacuum drying is completed, close the high and low pressure gauge pipes of pressure
gauge 1 as well as the high pressure gauge pipe of pressure gauge 2. Disconnect the medium pressure
gauge pipes of the two pressure gauges from the vacuum pumps. Disassemble the double intermediate
gauge pipe and the vacuum pump connection end, and then connect the refrigerant tank.
Step 3: Properly loosen the pipe of intermediate gauge and the connection end of pressure gauge,
slightly open the refrigerant tank valve, and empty the pipe of intermediate gauge. After that, retighten
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.