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TABLE 6
120S Normal Operating Pressures
Outdoor Coil Entering Air Temperature
65
°
F
75
°
F
85
°
F
95
°
F
105
°
F
115
°
F
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
107
257
110
294
112
338
115
384
119
436
121
493
Circuit 1
113
261
117
302
119
342
122
387
125
438
128
492
124
268
128
309
135
356
140
406
144
458
146
512
133
274
141
319
148
366
153
417
161
474
161
531
114
265
115
302
119
345
122
390
125
443
130
496
Circuit 2
121
269
125
310
127
354
131
401
134
448
137
498
132
279
140
319
145
365
148
414
152
469
155
524
137
284
147
329
155
379
163
430
171
486
171
539
11
70
80
90
100
110
120
130
Suction Pressure (psig)
Outdoor Temperature (°F)
115°
105°
95°
85°
75°
65°
120S Charging Curves
Circuit 1
Circuit 2
105
115
125
135
145
155
175
165
V- SYSTEMS SERVICE CHECKS
A-Cooling System Service Checks
Units are factory charged and require no further adjustment;
however, charge should be checked periodically using the ap
proach method. The approach method compares actual liquid
temperature with the outdoor ambient temperature. See sec
tion IV- CHARGING.
NOTE-When unit is properly charged discharge line pres
sures should approximate those in tables 4 through 6.
