Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual page 29

MXZ-SM96TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
<Figure 9> Correction of refrigerant piping length
MXZ-SM120TAM-U1
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0
<Figure 10> Correction of refrigerant piping length
■ Method for obtaining the piping equivalent length
Piping equivalent length = piping length to the farthest indoor unit + 0.3 × number of bends in the piping (m)
5-5-3. 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 correc-
tion factor from the following table to obtain the actual heating capacity.
Correction factor diagram
Outdoor Intake temperature [°F(°C)WB]
Correction factor
OCH800A_29
50 100 150 200
Piping equivalent length (ft)
50 100 150 200
Piping equivalent length (ft)
43(6) 37(4)
1.00 0.98
250 300 350
250 300 350
36(2) 32(0) 28(−2) 25(−4) 21(−6)
0.89 0.88 0.89 0.90 0.95
400 450 500
400 450 500
18(−8) 14(−10) 5(−15) −4(−20)
0.95 0.95 0.95 0.95
−13(−25)
0.95