GMV Heat Recovery DC Inverter VRF
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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.
Fig.3.7.1
Fig.3.7.2
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