GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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So, Σ Refrigerant charging amount B of every module=4.0+4.0+4.0=12kg (8.8+8.8+8.8
=26.4pounds).
Suppose the Pipeline charging amount A=Σ Liquid pipe length × refrigerant charging amount of
every 1m (or 1inch) liquid pipe=25kg (55.1 pounds)
Total refrigerant charging amount R=25+12=37kg (55.1+26.4=81.5pounds).
After confirming that there is no leakage from the system, when the compressor is not in operation,
charge additional R410A with specified amount to the unit through the filling opening of the liquid pipe
valve of the outdoor unit. If required additional refrigerant cannot be quickly filled for increase of pressure
in the pipe, set the unit at cooling startup and then fill the refrigerant from gas valve of outdoor unit. If
ambient temperature is low, the unit can‘t be set to cooling mode but heating mode.
Refrigerant amount must be calculated and treated by strictly following the above methods.
Otherwise, system will not work normally and compressor may even be damaged.
Rated capacity configuration ratio C of outdoor/indoor unit = Rated Cooling capacity sum of
indoor units/Rated Cooling capacity sum of outdoor units
If all the indoor units are GMV-NDX series fresh air indoor units, the added refrigerant quantity B
for every module is 0 kg（Pound）.
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