Mitsubishi Electric PUMY-P36NKMU4 Technical & Service Manual page 32

4-5. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING
(1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use
indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 13 to 17. Then multi-
ply by the cooling capacity from Figure 7 and 8 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity.
(2) During heating, find the equivalent piping length, and find the capacity ratio corresponding to standard piping length from
Figure 18. Then multiply by the heating capacity from Figure 9 and 10 in "4-2. CORRECTION BY TEMPERATURE" to
obtain the actual capacity.
(1) Capacity Correction Curve
Figure 13 PUMY-P36NKMU4
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0 50 100
Figure 14 PUMY-HP42NKMU2
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0 50
OCH811A
PUMY-HP36NKMU2
150 200 250 300
Piping equivalent length (ft)
100 150 200 250 300
Piping equivalent length (ft)
<Cooling>
350 400 450 500
<Cooling>
350 400 450 500 550
32
Total capacity of indoor unit
18 [kBtu/h]
27 [kBtu/h]
36 [kBtu/h]
46.8 [kBtu/h]
550 600
Total capacity of indoor unit
21 [kBtu/h]
31.5 [kBtu/h]
42 [kBtu/h]
54.6 [kBtu/h]
600