Manual 2100-721B
Page
52 of 54
35. PRESSURE SERVICE PORTS
High and low pressure service ports are installed on
all units so that the system operating pressures can
be observed. Table 19 outlines expected pressures at
various indoor and outdoor temperatures.
This unit employs high-flow Coremax valves instead of
the typical Shrader type valves.
TABLE 19
Cooling Pressure Table
Model
Return Air
Temperature
Pressure
75°
80°
85°
90°
95°
100°
105°
110°
115°
120°
125°
W24G4
75° DB
62° WB
Low Side
High Side
119.7
298.0
122.6
318.5
125.3
340.2
127.9
363.0
130.3
386.9
132.8
411.8
135.0
438.0
137.2
465.3
139.1
493.6
141.0
523.2
142.8
553.8
80° DB
67° WB
Low Side
High Side
128.0
305.6
131.1
326.7
134.0
348.9
136.8
372.3
139.4
396.8
142.0
422.4
144.4
449.2
146.7
477.2
148.8
506.3
150.8
536.6
152.7
568.0
85° DB
72° WB
Low Side
High Side
132.5
316.3
135.7
338.1
138.7
361.1
141.6
385.3
144.3
410.7
147.0
437.2
149.5
464.9
151.8
493.9
154.0
524.0
156.1
555.4
158.0
587.9
W30G4
75° DB
62° WB
Low Side
High Side
120.1
297.7
122.7
318.0
125.2
339.5
127.6
362.0
130.0
385.5
132.3
410.0
134.5
435.5
136.8
462.2
138.9
489.7
141.0
518.4
143.1
548.1
80° DB
67° WB
Low Side
High Side
128.5
305.3
131.2
326.2
133.9
348.2
136.5
371.3
139.0
395.4
141.5
420.5
143.9
446.7
146.3
474.0
148.6
502.3
150.8
531.7
153.0
562.2
85° DB
72° WB
Low Side
High Side
133.0
316.0
135.8
337.6
138.6
360.4
141.3
384.3
143.9
409.2
146.5
435.2
148.9
462.3
151.4
490.6
153.8
519.9
156.1
550.3
158.4
581.9
W36G4
75° DB
62° WB
Low Side
High Side
124.4
312.6
126.8
334.9
129.1
357.9
131.3
381.6
133.4
405.9
135.4
431.0
137.4
456.7
139.1
483.1
140.9
510.2
142.6
538.0
144.2
566.5
80° DB
67° WB
Low Side
High Side
133.1
320.6
135.6
343.5
138.1
367.1
140.4
391.4
142.7
416.3
144.8
442.0
146.9
468.4
148.8
495.5
150.7
523.3
152.5
551.8
154.2
581.0
85° DB
72° WB
Low Side
High Side
137.8
331.8
140.3
355.5
142.9
379.9
145.3
405.1
147.7
430.9
149.9
457.5
152.0
484.9
154.0
512.8
156.0
541.6
157.8
571.1
159.6
601.3
W42G4
75° DB
62° WB
Low Side
High Side
124.7
328.7
127.4
350.3
130.0
373.0
132.3
396.7
134.6
421.4
136.7
447.1
138.8
473.8
140.6
501.4
142.3
530.1
143.9
559.7
145.4
590.4
80° DB
67° WB
Low Side
High Side
133.4
337.1
136.3
359.3
139.0
382.6
141.5
406.9
144.0
432.2
146.2
458.6
148.4
485.9
150.4
514.3
152.2
543.7
153.9
574.1
155.5
605.5
85° DB
72° WB
Low Side
High Side
138.1
348.9
141.1
371.9
143.9
396.0
146.5
421.1
149.0
447.3
151.3
474.7
153.6
502.9
155.7
532.3
157.5
562.7
159.3
594.2
W48G4
75° DB
62° WB
Low Side
High Side
124.9
325.9
126.8
347.5
128.7
369.8
130.4
392.9
132.2
416.9
134.0
441.7
135.8
467.2
137.5
493.6
139.3
520.8
141.0
548.9
142.7
577.8
80° DB
67° WB
Low Side
High Side
133.6
334.3
135.6
356.4
137.6
379.3
139.5
403.0
141.4
427.6
143.3
453.0
145.2
479.2
147.1
506.3
149.0
534.2
150.8
563.0
152.6
592.6
85° DB
72° WB
Low Side
High Side
138.3
346.0
140.3
368.9
142.4
392.6
144.4
417.1
146.3
442.6
148.3
468.9
150.3
496.0
152.2
524.0
154.2
552.9
156.1
582.7
157.9
613.3
W60G4
75° DB
62° WB
Low Side
High Side
123.3
309.0
125.1
329.6
127.0
351.4
128.8
374.2
130.6
398.2
132.5
423.3
134.3
449.6
136.1
477.0
137.9
505.5
139.8
535.2
141.6
566.0
80° DB
67° WB
Low Side
High Side
131.9
316.9
133.8
338.1
135.8
360.4
137.8
383.8
139.7
408.4
141.7
434.2
143.6
461.1
145.6
489.2
147.5
518.5
149.5
548.9
151.4
580.5
85° DB
72° WB
Low Side
High Side
136.5
328.0
138.5
349.9
140.6
373.0
142.6
397.2
144.6
422.7
146.7
449.4
148.6
477.2
150.7
506.3
152.7
536.6
154.7
568.1
156.7
600.8
WARNING! Do NOT use a Schrader valve core removal
tool with these valves. Use of such a tool could result
in eye injuries or refrigerant burns!
To change a Coremax valve without first removing the
refrigerant, a special tool is required which can be
obtained at www.fastestinc.com/en/SCCA07H. See the
replacement parts manual for replacement core part
numbers.
Low side pressure ± 4 PSIG High side pressure ±10 PSIG
Tables 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 reclaimed, and the system
evacuated and recharged to serial plate instruction.
