Mitsubishi Electric PUHY-P168, Service Handbook

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[
VIII
Test Run Mode ]
(2) Example: PUHY-P234TGMU-A
(3) Sample calculation
15.88 [3/4"](30 m [98 ft])
15.88 [3/4"](10 m [32 ft])
6.35 [1/4"]
(10 m [32 ft])
9.52 [3/8"](10 m [32 ft])
9.52 [3/8"]
(10 m [32 ft]) 9.52 [3/8"]
(10m [32 ft]) 9.52 [3/8"]
(20 m [65 ft]) 9.52 [3/8"]
(20 m [65 ft])
96 model 54 model 30 model
24 model 06 model
All the pipes in the figure are liquid pipes.
15.88 [3/4"] : 30 m [98 ft] + 10 m [32 ft] = 40 m [130 ft]
9.52 [3/8"] : 10 m [32 ft] + 2 0m [65 ft] + 20 m [65 ft] + 10 m [32 ft] + 10 m [32 ft] = 70 m [226 ft]
6.35 [1/4"] : 10 m [32 ft]
According to the above formula
The calculation result would be 15.44, and it is rounded up to the nearest 0.1.
The calculation result would be 540.7oz, and it is rounded up to the nearest 1 oz or 4 oz.
The final result will be as follows:
Amount of refrigerant to be charged (kg) = (0.2 X 40) + (0.06 X 70) + (0.024 X 10) + 3 = 15.44kg
Amount of refrigerant to be charged = 15.5kg
The final result will be as follows:
Amount of refrigerant to be charged (oz) = (2.15 X 130) + (0.65 X 226) + (0.26 X 32) + 106 = 540.7oz
Amount of refrigerant to be charged = 544oz or 541oz
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.