Gree Ultra Heat GMV-VQ72W/A-F, Руководство по обслуживанию

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION
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desiccation.
Step 2: After vacuumization and desiccation are finished, turn off valves of the high pressure gauge
and low pressure gauge. Disconnect the medium gauge pipe from the vacuum pump and connect it to
the refrigerant tank.
Step 3: Properly loosen the joint between the medium gauge pipe and the pressure gauge and
slightly turn on the valve of the refrigerant tank. Vacuumize the medium gauge pipe. After that, fasten the
joint and turn on the valve of the refrigerant tank completely.
Step 4: If the refrigerant tank is not equipped with a siphon, reverse the refrigerant tank and place it
on the electronic scale. Then record the current weight (m1). If the refrigerant tank is equipped with a
siphon, record the current weight (m1) directly.
Step 5: Turn on the valve of the high pressure gauge (while keep the valve of the high pressure
gauge turned off) and then perfuse refrigerant to the system. Record the change of weight of the
refrigerant tank.
Step 6: When all refrigerant in the refrigerant tank is perfused, record the current weight m2.
Step 7: Turn off the valve of the high pressure gauge and replace the refrigerant tank.
Step 8: Perform step 3 again.
Step 9: Perform step 5 and step 6 again. Record the weight before perfusion m3 and weight after
perfusion m4.
Step 10:If there is no sufficient refrigerant and the calculated quantity of refrigerant is not fulfilled for
the system, record the current total perfusion quantity.
m=(m1-m2)+(m3-
m4)+…+(mn-1-mn)
Quantity of refrigerant to be perfused during running m=M-m
M is the required total quantity
If the pre-perfusion quantity (m) reaches the required total quantity for the system, turn off the valve
of the refrigerant tank immediately to finish perfusing and proceed with step 11.