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Normal Operating Pressures
NOTE: Values provided in chart are typical pressures. Indoor unit matchup, indoor air quality and indoor load will cause pressures to
vary.
Temperature of the Air
Entering the Outdoor Coil
Cooling—1st Stage (Low Capacity)
65ºF
75ºF
85ºF
95ºF
105ºF
115ºF
Cooling—2nd Stage (High Capacity)
65ºF
75ºF
85ºF
95ºF
105ºF
115ºF
Heating—1st Stage (Low Capacity)
40ºF
50ºF
Heating—2nd Stage (High Capacity)
20º
30ºF
40ºF
50ºF
8
Model
-24
-36
Liquid
Suction
Liquid
232
146
225
264
148
261
307
149
302
353
151
349
403
153
397
460
155
461
240
143
239
279
145
278
322
147
322
371
149
367
423
151
426
485
154
489
337
93
328
322
117
333
279
62
296
288
76
309
302
93
322
306
112
336
-48
Suction
Liquid
Suction
144
235
144
147
268
145
149
310
147
151
356
148
153
407
150
157
466
152
139
244
140
141
283
141
143
326
144
146
374
147
148
427
148
151
491
151
98
369
75
118
366
114
62
311
58
75
334
72
92
354
89
113
381
108
-60
Liquid
Suction
225
138
264
141
305
142
352
146
405
148
459
150
241
134
280
136
324
137
373
138
425
142
486
146
351
63
335
92
308
59
323
70
318
69
329
82
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