Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual page 27

5-5. Correcting capacity for changes in the length of refrigerant piping
During cooling, obtain the ratio (and the piping equivalent length) of the outdoor units nominal capacity and the total in-
use indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 5 to 7. Then
multiply by the cooling capacity from Figure 1 and 2 in "5-2. Correction by temperature" to obtain the actual capacity.
During heating, find the piping equivalent length, and find the capacity ratio corresponding to standard piping length from
Figure 8 to 10. Then multiply by the heating capacity from Figure 3 and 4 in "5-2. Correction by temperature" to obtain the
actual capacity.
■ Capacity Correction Curve
5-5-1. Cooling
MXZ-SM72TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
<Figure 5> Correction of refrigerant piping length
MXZ-SM96TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
<Figure 6> Correction of refrigerant piping length
OCH800A_27
50 100 150 200
Piping equivalent length (ft)
50 100 150 200
Piping equivalent length (ft)
Total capacity of indoor unit [kBtu/h]
250 300 350 400
Total capacity of indoor unit [kBtu/h]
250 300 350 400
36
54
72
93.6
450 500
48
72
96
124.8
450 500