Manual 2100-711F
Page
33 of 45
TABLE 11A
Cooling Pressure – Standard Airflow
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 24.
* Operating at these conditions would be outside the compressor operating envelope and is not recommended.
TABLE 11B
Heating Pressure – Standard Airflow
Air Temperature Entering Outdoor Coil °F
Model
Indoor
Heating
0
5
10
15
20
25
30
35
40
45
50
55
60
65
W42HC
70
Low Side
High Side
39
283
44
287
50
292
56
297
62
304
68
310
75
318
82
326
89
335
97
345
105
355
113
367
122
378
131
391
W48HC
70
Low Side
High Side
36
263
41
271
46
279
52
287
58
296
64
304
71
314
79
323
86
333
94
343
103
353
111
364
121
375
130
386
W60HC
70
Low Side
High Side
32
297
38
303
45
310
51
317
58
324
65
332
72
339
79
348
87
356
94
365
102
374
110
383
118
393
126
403
Model
Return Air Temp
(DB/WB)
Pressure
75
80
85
90
95
100
105
110
115
120
125
131
W42HC
75/62
Low Side
High Side
122
318
125
339
128
361
130
385
133
410
135
436
137
463
139
492
141
521
143
552
144
583
146
623
80/67
Low Side
High Side
131
326
134
348
137
371
139
395
142
421
144
447
147
475
149
504
151
534
153
566
154
598
156
639
85/72
Low Side
High Side
136
337
139
360
142
384
144
409
147
435
150
463
152
492
154
522
156
553
158
585
160
619
--*
W48HC
75/62
Low Side
High Side
130
322
132
344
134
367
135
391
137
416
139
442
141
468
142
496
144
525
146
554
148
585
150
623
80/67
Low Side
High Side
139
330
141
353
143
376
145
401
147
426
149
453
150
480
152
509
154
538
156
569
158
600
160
639
85/72
Low Side
High Side
144
341
146
365
148
389
150
415
152
441
154
469
156
497
158
527
160
557
162
588
163
621
--*
W60HC
75/62
Low Side
High Side
123
311
125
337
127
365
129
391
131
418
133
445
135
472
137
499
139
526
140
553
142
579
144
611
80/67
Low Side
High Side
131
319
134
346
136
374
138
401
140
429
142
457
144
484
146
512
148
539
150
567
152
594
154
627
85/72
Low Side
High Side
136
330
139
358
141
387
143
415
145
444
147
473
150
501
151
530
153
558
155
587
157
615
--*