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PIPING WORK AND REFRIGERANT CHARGE
Ensure that the total additional charge quantity should not exceed the max. additional refrigerant charge quantity.
Maximum additional refrigerant
charge quantity (kg)
Model
W0 Outdoor unit refrigerant charge (kg)
RAS-8FSXNSE
RAS-10FSXNSE
RAS-12FSXNSE
RAS-14FSXNSE
RAS-16FSXNSE
RAS-18FSXNSE
RAS-20FSXNSE
RAS-22FSXNSE
RAS-24FSXNSE
N O T E
8.7 CHARGING WORK
After vacuum pumping work, check that the high/low pressure
gas valve, low pressure gas valve (low pressure gas valve is for
heat recovery system only) and liquid stop valve are fully closed.
Charge the additional refrigerant from the check joint of liquid stop
valve (acceptable error must be within 0.5 kg).
After the refrigerant has been charged, fully open the liquid stop
valve and the gas stop valves.
fully open the stop valve for the gas line. (For heat recovery
system, both stop valves of high/low pressure and low pressure
side).
Charge the correct refrigerant quantity according to Additional
refrigerant charge calculation. If not, a compressor may be
Refrigerant charge from check joint of gas stop valve may lead to
compressor failure. Be sure to charge refrigerant from the check
joint of liquid stop valve.
Insulate the liquid piping and gas piping completely to avoid
decreasing of performance and dewing on the surface of the pipe.
insulation.
44
PMML0479 rev.2 - 02/2018
(5-10)
12
(14/18)
28.0
36.0
40.0
5.0
5.0
7.2
8.9
9.9
10.7
11.3
11.3
11.6
HP
(20-22)
24
51.0
52.0
Model
W0 Outdoor unit refrigerant charge (kg)
RAS-5FSXNPE
RAS-6FSXNPE
RAS-8FSXNPE
RAS-10FSXNPE
RAS-12FSXNPE
RAS-14FSXNPE
RAS-16FSXNPE
RAS-18FSXNPE
Check to ensure that there is no gas leakage. If a large refrigerant
N O T E
C A U T I O N
(26-66)
(68-88)
(90-96)
63.0
73.0
93.0
4.7
5.0
8.5
8.5
9.3
9.3
10.0
10.6
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