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PERFORMANCE CURVE DIAGRAM
REMARKS FOR GAS PRESSURE CHECK AND CHARGING
Gas pressure is to be measured at TEST OPERATION for cooling or EMERGENCY OPERATION for
heating. (It is operated for 30 minutes at fixed frequency.)
If you find substantial diffrence in performance compared with PERFORMANCE CURVE as shown next,
recharge the refrigerant.
(In order to avoid excessive charging, purge all the remaining refrigerant first and then evacuate the unit
completely with vacuum pump and finally apply rated volume charging of refrigerant.)
Charging of refrigerant should be done by cooling operation, because the pressure at service valve will
be too high at heating cycle, then the heating performance characteristics must be checked by restarting
of heating operation.
Piping size
Max. tube length
Liquid side
Gas side
6.35mm
15.88mm
15m
10m
Max. height difference
