Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 188 / 414

[
VIII
Test Run Mode ]
- 179 - HWE09080 GB
(2) Example: PQHY-P144TSHMU-A/YSHMU-A
(3) Sample calculation
CAUTION
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
Œ
If gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may
result in performance loss.
[3/4"][98 ft]
[3/4"] [32 ft]
[3/8"][32 ft]
9.52
(20 m) 9.52
(10 m) 9.52
(10 m) 9.52
(10 m) 6.35
(10 m)
9.52 (10 m)
[3/8"]
[32 ft]
[3/8"]
[3 ft] [3/8"]
[9 ft]
[3/8"]
[32 ft] [1/4"]
[32 ft] [3/8"]
[32 ft]
[3/8"]
[65 ft]
15.88 (10 m)
15.88 (30 m)
9.52
(3 m)
9.52
(1 m)
×
×
96
model
48
model
30
model
24
model
06
model
96
model
48
model
30
model
24
model
06
model
Liquid
separator
Liquid
separator
All the pipes in the figure are liquid pipes.
15.88 : 30 m + 10 m = 40 m
9.52 : 3 m + 1m + 10 m + 10 m + 20 m + 10 m + 10 m = 64 m
6.35 : 10 m
According to the above formula
The calculation result would be 17.08, 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 40) + (0.06 X 64) + (0.024 X 10) + 5.0 = 17.08kg
Amount of refrigerant to be charged = 17.1kg
All the pipes in the figure are liquid pipes.
[3/4"] : [98 ft] + [32 ft] = [130 ft]
[3/8"] : [9 ft] + [3 ft] + [32 ft] + [32 ft] + [65 ft] + [32 ft] + [32 ft] = [205 ft]
[1/4"] : [32 ft]
According to the above formula
The calculation result would be 598.07 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 130) + (0.65 X 205) + (0.26 X 32) + 177 = 598.07oz
Amount of refrigerant to be charged = 599 oz