Manual 2100-712C
Page
23 of 38
TABLE 5
MULTI-TEC Cooling Pressures
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.
Model
Return Air Temp
(DB/WB)
Pressure
75
80
85
90
95
100
105
110
115
120
125
W18A/L
75/62
Low Side
High Side
121
293
123
312
126
332
128
353
131
376
134
400
136
425
137
452
140
480
142
510
144
540
80/67
Low Side
High Side
129
300
132
320
135
340
137
362
140
386
143
410
145
436
147
464
150
492
152
523
154
554
85/72
Low Side
High Side
134
311
137
331
140
352
142
375
145
400
148
424
150
451
152
480
155
509
157
541
159
573
W24A/L
75/62
Low Side
High Side
123
314
124
334
126
355
128
377
129
401
131
425
133
451
135
479
137
507
139
536
141
567
80/67
Low Side
High Side
132
322
133
343
135
364
137
387
138
411
140
436
142
463
144
491
146
520
149
550
151
582
85/72
Low Side
High Side
137
333
138
355
140
377
142
401
143
425
145
451
147
479
149
508
151
538
154
569
156
602
W30A/L
75/62
Low Side
High Side
118
312
120
333
122
355
124
378
126
403
128
428
131
454
133
483
135
511
137
540
138
570
80/67
Low Side
High Side
126
320
128
342
131
364
133
388
135
413
137
439
140
466
142
495
144
524
146
554
148
585
85/72
Low Side
High Side
130
331
132
354
136
377
138
402
140
427
142
454
145
482
147
512
149
542
151
573
153
605
W36A/L
75/62
Low Side
High Side
117
323
120
346
122
370
124
394
127
419
129
446
131
473
134
500
136
528
137
558
138
587
80/67
Low Side
High Side
125
331
128
355
130
379
133
404
136
430
138
457
140
485
143
513
145
542
147
572
148
602
85/72
Low Side
High Side
129
343
132
367
135
392
138
418
141
445
143
473
145
502
148
531
150
561
152
592
153
623
Summary of Contents for MULTI-TEC W18ABP Series
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Page 18: ...Manual 2100 479 Page 6 of 11 FIGURE 1 TYPICAL AIR CONDITIONING SYSTEM COOLING CYCLE MIS 369 ...
Page 19: ...Manual 2100 479 Page 7 of 11 FIGURE 2 TYPICAL HEAT PUMP SYSTEM COOLING CYCLE MIS 368 ...
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