Mitsubishi Electric City Multi PUHY-HP144TSHMU-A, Service Handbook

Page: 114 / 265

[
VIII
Test Run Mode ]
- 105 - HWE0716A GB
(2) Example: PUHY-HP192TSHMU-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]
[1/2"] [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]
12.7 (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
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 16.28, 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) + (0.12 X 10) + (0.06 X 64) + (0.024 X 10) + 5.0 = 16.28kg
Amount of refrigerant to be charged = 16.3kg
12.7 : 10 m
All the pipes in the figure are liquid pipes.
[3/4"] : [98 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 570.55 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) + (1.29 X 32) + (0.65 X 205) + (0.26 X 32) + 177 = 570.55oz
Amount of refrigerant to be charged = 571 oz
[1/2"] : [32 ft]