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5- Add or remove charge in increments. Allow the system
to stabilize each time refrigerant is added or removed.
6- Continue the process until measured liquid tempera
ture agrees with the target liquid temperature. Do not
go below the target liquid temperature when adjusting
charge. Note that suction pressure can change as
charge is adjusted.
7- Example ZHA092S Circuit 1: At 95°F outdoor ambient
and a measured suction pressure of 130psig, the target
liquid temperature is 103°F. For a measured liquid tem
perature of 106°F, add charge in increments until mea
sured liquid temperature agrees with the target liquid
temperature.
TABLE 4
092S 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)
95
244
98
285
100
325
104
372
108
424
113
485
105
251
108
289
112
337
115
385
118
436
121
492
Circuit 1
110
253
118
297
126
346
128
398
136
450
135
505
113
260
122
302
130
351
137
404
144
458
143
515
119
240
124
281
128
322
131
368
135
419
138
473
Circuit 2
124
244
127
281
131
325
134
371
139
422
144
477
133
241
142
293
149
338
152
387
158
436
159
488
136
253
144
291
154
336
162
386
169
436
174
492
11
70
80
90
100
110
120
130
105
115
125
135
145
155
165
Suction Pressure (psig)
Outdoor Temperature (°F)
115°
105°
95°
85°
75°
65°
092S Charging Curves
Circuit 1
Circuit 2
95
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