Mitsubishi Electric PUMY-HP36NKMU1, Техническое и сервисное руководство, Страница: 30 / 156

30
OCH733
(2) Method for Obtaining the Equivalent Piping Length
Equivalent length = (length of piping to farthest indoor unit) + (0.3
o
number of bends in the piping) (m)
4-5-1. Correction of Heating Capacity for Frost and Defrosting
If heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction
factor from the following table to obtain the actual heating capacity.
Correction factor diagram
Outdoor Intake temperature <W.B.°F (°C)>
43(6) 37(4) 36(2) 32(0) 28(−2) 25(−4) 21( − 6) 18(−8) 14(−10) 5(−15) −4(−20) −13(−25)
Correction factor
1.0 0.98 0.89 0.88 0.89 0.9 0.95 0.95 0.95 0.95 0.95 0.95
Figure 17 PUMY-P60NKMU3, PUMY-P60NKMU3-BS <Heating>
Total capacity of indoor unit
0 20 40 60 80 100 120 140 160 180 200 220 240 260
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Capacity ratio
Piping equivalent length (ft)