Mitsubishi Electric City Multi PFAV-P500VMH-E, Service Handbook

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[
IX
Test Run Mode ]
- 91 -
HWE07150 GB
(2) Example: Outdoor unit PUHY-P500YSHM-A, Indoor unit PFAV-P500VMH-E
(3) Sample calculation
CAUTION
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
ΠIf gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may
result in performance loss.
15.88[3/4"]
(30m)[98 ft]
9.52[3/8"]
(1m)[3 ft] 9.52[3/8"]
(3m)[9 ft]
Liquid
separetor
Indoor
All the pipes in the figure are liquid pipes.
15.88 : 30 m
9.52 : 3 m + 1m = 4 m
According to the above formula
The calculation result would be 11.24, and it is rounded up to the nearest 0.1.
The final result will be as follows:
Amount of refrigerant to be charged (kg) = (0.2 X 30) + (0.06 X 4) + 5.0 = 11.24 kg
Amount of refrigerant to be charged = 11.3 kg
All the pipes in the figure are liquid pipes.
[3/4"] : [98 ft]
[3/8"] : [9 ft] + [3 ft] = [12 ft]
According to the above formula
The calculation result would be 395.5 oz, and it is rounded up to the nearest 1 oz.
The final result will be as follows:
Amount of refrigerant to be charged (oz) = (2.15 X 98) + (0.65 X 12) + 177 = 395.5 oz
Amount of refrigerant to be charged = 396 oz