Mitsubishi Electric PUHZ-RP140VHA2, Data Book

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8-3. CAPACITY CORRECTION CURVES
Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity
curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered com-
paring to the standard diameter. The lowered capacity can be obtained by referring to capacity curves for gas pipe which is
one size smaller than standard size.
Corrected pipe length (m) = actual pipe length (m) + number of bends x 0.3 (m)
[Sample calculation]
Indoor unit RP60
oo
2 units (Twin system)
Outdoor unit RP125
oo
1
■
Condition Using existing pipes.
• Outdoor unit side
Liquid pipe [ [ 12.7 / Gas pipe [ [ 19.05
pipe length (A) 20m
• Indoor unit side
Liquid pipe [ [ 9.52 / Gas pipe [ [ 15.88
pipe length (B) 20m + (C) 15m
1) Farthest piping length 20m + 15m = 35m
Number of bends : 10
2) Corrected piping length 35m + 0.3
oo
10 = 38m
3) Capacity correction Outdoor unit side’s gas pipe [ [ 19.05
Standard [ [ 15.88
→
1 size up
Refer to 1 1 Capacity curves <Standard size>
4) Capacity Cooling capacity = Standard cooling capacity
oo
0.89
Heating capacity = Standard heating capacity
oo
0.98
1 1
Capacity curves for PUHZ-RP • HA2 model <Standard size>
Cooling
Heating
100
95
90
85
80
75
70
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
Note: The permitted pipe length is up to 55m for RP35, 50, 60, 71 model.
The permitted pipe length is up to 80m for RP100 ~ 140 model.
Cooling RP71 model
Cooling RP35, 60 models
Cooling RP50, 100 models
Heating RP35, 50, 60,
71, 100, 125 and 140
models
(Up to 55m for RP35,
50, 60, 71 models)
Cooling RP125 model
Cooling RP140 model
Capacity ratio [%]
Corrected pipe length [m]
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