Manual 2100-654C
Page
29 of 34
TABLE 7A – Cooling Pressure
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”.
Model
Return Air Temp
(DB/WB)
Pressure
75
80
85
90
95
100
105
110
115
120
125
W18HA
75/62
Low Side
High Side
125
278
127
298
130
321
132
343
134
367
137
391
138
415
140
441
143
467
145
494
147
523
80/67
Low Side
High Side
134
285
136
306
139
329
141
352
143
376
146
401
148
426
150
452
153
479
155
507
157
536
85/72
Low Side
High Side
139
295
141
317
144
341
146
364
148
389
151
415
153
441
155
468
158
496
160
525
162
555
W24HA
75/62
Low Side
High Side
126
324
128
344
130
367
132
390
134
414
136
440
137
467
139
495
141
526
144
557
146
589
80/67
Low Side
High Side
135
332
137
353
139
376
141
400
143
425
145
451
147
479
149
508
151
539
154
571
156
604
85/72
Low Side
High Side
140
344
142
365
144
389
146
414
148
440
150
467
152
496
154
526
156
558
159
591
161
625
W30HA
75/62
Low Side
High Side
120
309
122
331
125
352
128
375
131
401
133
426
136
453
138
482
140
511
142
541
145
573
80/67
Low Side
High Side
128
317
131
339
134
361
137
385
140
411
142
437
145
465
148
494
150
524
152
555
155
588
85/72
Low Side
High Side
132
328
136
351
139
374
142
398
145
425
147
452
150
481
153
511
155
542
157
574
160
609
W36HA
75/62
Low Side
High Side
129
329
131
351
133
373
135
397
137
422
138
449
140
476
142
504
144
533
146
564
148
596
80/67
Low Side
High Side
138
337
140
360
142
383
144
407
146
433
148
460
150
488
152
517
154
547
156
578
158
611
85/72
Low Side
High Side
143
349
145
373
147
396
149
421
151
448
153
476
155
505
157
535
159
566
161
598
164
632
W42HA
75/62
Low Side
High Side
131
319
133
339
135
361
137
384
137
409
139
434
141
460
143
488
145
517
147
547
149
579
80/67
Low Side
High Side
140
327
142
348
144
370
146
394
147
419
149
445
151
472
153
500
155
530
157
561
159
594
85/72
Low Side
High Side
145
338
147
360
149
383
151
408
152
434
154
461
156
489
158
518
160
549
162
581
165
615
W48HA
75/62
Low Side
High Side
126
331
129
353
131
377
133
402
136
427
137
453
139
481
141
509
143
538
145
568
147
599
80/67
Low Side
High Side
135
339
138
362
140
387
142
412
145
438
147
465
149
493
151
522
153
552
155
583
157
614
85/72
Low Side
High Side
140
351
143
375
145
401
147
426
150
453
152
481
154
510
156
540
158
571
160
603
162
635
W60HA
75/62
Low Side
High Side
121
324
123
347
126
371
128
396
130
422
132
449
134
476
136
504
137
532
139
563
141
593
80/67
Low Side
High Side
129
332
132
356
135
381
137
406
139
433
141
460
143
488
145
517
147
546
149
577
151
608
85/72
Low Side
High Side
134
344
137
368
140
394
142
420
144
448
146
476
148
505
150
535
152
565
154
597
156
629
TABLE 7B – Heating Pressure
Air Temperature Entering Outdoor Coil °F
Model
Return Air Temp
Pressure
0
5
10
15
20
25
30
35
40
45
50
55
60
W18HA
70
Low Side
High Side
50
267
55
270
60
274
65
278
71
284
78
290
85
297
92
305
100
314
108
324
116
335
125
346
135
359
W24HA
70
Low Side
High Side
25
261
35
270
44
279
53
288
61
297
69
306
76
315
83
324
90
333
96
342
101
352
107
361
111
370
W30HA
70
Low Side
High Side
50
349
51
328
54
313
57
302
61
297
67
297
73
302
81
313
90
328
99
349
110
376
122
407
135
444
W36HA
70
Low Side
High Side
34
428
41
374
48
330
55
298
62
276
69
264
76
263
83
273
90
294
98
325
105
366
112
419
120
482
W42H
70
Low Side
High Side
66
326
60
313
57
303
55
298
56
296
60
298
65
305
73
315
84
329
96
348
111
370
128
396
148
426
W48H
70
Low Side
High Side
29
293
35
292
41
294
48
297
55
302
62
309
69
317
77
328
86
340
94
354
103
369
113
387
123
406
W60H
70
Low Side
High Side
63
529
59
462
56
408
56
368
57
342
61
328
66
328
73
341
82
368
93
408
106
461
122
528
139
608
