Mitsubishi PUMY-P60NKMU - Capacity Correction Curve; Correcting Capacity for Changes in the Length of Refrigerant Piping; High Heating Performance Curve

15
0.6
0.5
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0.7
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0.9
1.0
1.1
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0.6
0.5
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-25 -20 -15 -10 -5 0 1510520
-13 -4 5 14 23 32 595041 68
15 (59)
21.1 (70)
25 (77)
27.2 (81)
15 (59)
21.1 (70)
25 (77)
27.2 (81)
[°CWB]
[°FWB]
Ratio of power input
Ratio of heating capacity
OUTDOOR
INDOOR
INDOOR
:DB (°FDB)
:DB (°FDB)
Figure 3 High heating performance curve
4-4-2. 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 3. Then multiply by
the cooling capacity from Figure 1 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 3. Then multiply by the heating capacity from Figure 2 to obtain the actual capacity.
Figure 3 Capacity correction curve
Heating
Cooling
75
80
85
90
95
100
105
0 1020304050607080 [m]
0 33 66 98 131 164 197 230 263 [ft]
Corrected pipe length
Capacity ratio [%]
• Method for obtaining the equivalent piping length
Equivalent length for type P60 = (length of piping to farthest indoor unit) + (0.3 o number of bends in the piping) (m)
Length of piping to farthest indoor unit: 80 m [262 ft]
OCH502C