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Manual 2100-769A
Page
41 of 50
TABLE 11B
Cooling Pressures – Part Load
Air Temperature Entering Outdoor Coil °F
Low side pressure ± 4 PSIG
High side pressure ± 10 PSIG
Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge
being in the system, the charge should be removed and system evacuated and recharged to serial plate charge weight.
NOTE:
Pressure table based on high speed condenser fan operation. If condensing pressures appear elevated check
condenser fan wiring. See
Condenser Fan Operation
on page 30.
* Operating at these conditions would be outside the compressor operating envelope and is not recommended.
Model
Return Air
Temp
(DB/WB)
Pressure
75
80
85
90
95
100
105
110
115
120
125
C36HY
75/62
Suction Pressure
137
139
140
141
142
143
145
146
147
149
150
Head Pressure
236
273
293
315
337
360
385
410
437
465
494
80/67
Suction Pressure
147
149
150
151
152
153
155
156
158
159
161
Head Pressure
242
280
301
323
346
370
395
421
448
477
506
85/72
Suction Pressure
152
154
155
156
157
159
160
162
163
165
166
Head Pressure
251
290
311
334
358
382
408
436
464
493
524
C42HY
75/62
Suction Pressure
137
137
137
137
138
139
140
141
143
145
147
Head Pressure
241
279
299
320
343
366
390
415
442
469
498
80/67
Suction Pressure
147
146
146
147
147
148
150
151
153
155
157
Head Pressure
248
286
307
328
351
375
400
426
453
481
510
85/72
Suction Pressure
152
151
151
152
153
154
155
156
158
160
163
Head Pressure
256
296
317
340
364
388
414
441
469
498
528
C48HY
75/62
Suction Pressure
132
135
137
139
140
142
144
146
148
150
152
Head Pressure
244
276
295
314
335
357
381
405
431
459
487
80/67
Suction Pressure
141
145
146
148
150
152
154
156
158
160
162
Head Pressure
250
284
302
322
344
367
391
416
443
471
500
85/72
Suction Pressure
146
150
152
153
155
157
159
161
163
166
168
Head Pressure
259
293
313
334
356
379
404
430
458
487
517
C60HY
75/62
Suction Pressure
130
132
133
134
135
136
137
139
140
141
---*
Head Pressure
245
284
306
327
350
374
399
424
451
478
80/67
Suction Pressure
139
141
143
144
145
146
147
148
149
151
Head Pressure
251
292
313
336
359
384
409
435
462
490
85/72
Suction Pressure
144
146
148
149
150
151
152
153
155
156
Head Pressure
260
302
324
348
372
397
423
450
478
507