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ACDS-PRC001-EN10
Performance
Adjustment
Factors
Chart PD-2— Compressor-Condenser Capacity Increase Due To Subcooling (R-22)
Table PD-1 –- N Factor –- Semihermetic Compressors
Saturated Suction Temperature (F)
Cond.
Temp. 30 35 40 45 50
110 1.34 1.32 1.29 1.27 1.25
115 1.36 1.34 1.31 1.29 1.27
120 1.40 1.37 1.34 1.32 1.30
125 1.43 1.40 1.37 1.34 1.32
130 1.48 1.44 1.40 1.38 1.35
135 1.52 1.48 1.44 1.41 1.38
140 1.58 1.54 1.49 1.45 1.42
145 1.65 1.59 1.54 1.49 1.46
Note:
1. In order to determine N factor for CUAB units, find proper factor corresponding with the proper
suction and condensing temperature from Table 9-1. This factor should be adjusted by adding or
subtracting the correction value from Table 9-2.
Table PD-4 – - N Factor Correction –- Compressor
Compressor Correction Factor
CUAB-015M + 0.02
020M –––
025M – 0.01
030M + 0.01
040R – 0.02
050R – 0.04
060R – 0.04
075E – 0.02
100E – 0.04
Table PD-2–- N Factor –- Open Compressors
Saturated Suction Temperature (F)
Cond.
Temp. 30 35 40 45 50
110 1.245 1.225 1.215 1.195 1.175
115 1.260 1.240 1.230 1.210 1.190
120 1.275 1.255 1.245 1.225 1.205
125 1.290 1.270 1.260 1.240 1.220
130 1.305 1.285 1.275 1.255 1.235
135 1.320 1.300 1.290 1.270 1.250
140 1.335 1.315 1.305 1.285 1.265
Table PD-3 –- Altitude Correction Multiplier For Cooling Capacity – - Air-Cooled Condenser
Altitude (Ft) 2,000 4,000 6,000 8,000 10,000
Correction Multiplier 0.977 0.949 0.917 0.881 0.843