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Table 14. Normal Operating Pressures* SPB*H4S45Y
1
Use tables to perform maintenance checks; it is not a pro-
cedure for charging the system. Minor variations in these
pressures may be due to differences in installations. Signifi-
cant deviations could mean that the system is not properly
charged or that a problem exists with some component in the
system.
Normal Operating Pressures − Cooling
SPB*
−036
H4
°F
Liq
Vap
(°C)**
First Stage (Low Capacity) Pressure
65
220
141
(18.3)
75
254
144
(23.9)
85
295
148
(29.4)
95
340
150
(35.0)
105
389
153
(40.6)
115
444
156
(46.1)
Second Stage (High Capacity) Pressure
65
232
129
(18.3)
75
269
136
(23.9)
85
312
140
(29.4)
95
346
142
(35.0)
105
409
145
(40.6)
115
465
148
(46.1)
Normal Operating Pressures − Heating
First Stage (Low Capacity) Pressure
50
350
115
(10)
60
372
136
(15.5)
Second Stage (High Capacity) Pressure
20
321
61
(−7.0)
30
347
74
(−1.0)
40
367
90
(4.4)
50
387
110
(10)
60
395
131
(15.5)
*
Typical pressures only, expressed in psig (liquid +/− 10 and va-
por+/− 5 psig); indoor match up, indoor air quality, and indoor load
will cause the pressures to vary. These operating pressures are
also listed on the unit charging sticker (580005−01) located on the
access panel.
** Temperature of air entering outdoor coil.
−048
−060
Liq
Vap
Liq
Vap
224
143
230
137
259
143
267
139
302
147
311
141
346
149
357
144
396
152
398
147
450
155
453
149
238
138
232
131
278
140
276
133
321
142
320
136
372
144
367
138
424
147
421
141
481
149
479
144
336
114
385
108
363
135
414
126
289
57
332
59
294
69
349
67
321
80
361
75
341
110
383
85
361
128
425
122
Table 15. HFC−410A Temp. (°F) − Pressure (Psig)
°F
Psig
°F
32
100.8
63
33
102.9
64
34
105.0
65
35
107.1
66
36
109.2
67
37
111.4
68
38
113.6
69
39
115.8
70
40
118.0
71
41
120.3
72
42
122.6
73
43
125.0
74
44
127.3
75
45
129.7
76
46
132.2
77
47
134.6
78
48
137.1
79
49
139.6
80
50
142.2
81
51
144.8
82
52
147.4
83
53
150.1
84
54
152.8
85
55
155.5
86
56
158.2
87
57
161.0
88
58
163.9
89
59
166.7
90
60
169.6
91
61
172.6
92
62
175.4
93
V − SERVICE AND RECOVERY
WARNING
Polyol ester (POE) oils used with HFC−410A refriger-
ant absorb moisture very quickly. It is very impor-
tant that the refrigerant system be kept closed as
much as possible. DO NOT remove line set caps or
service valve stub caps until you are ready to make
connections.
IMPORTANT
Use recovery machine rated for HFC−410A refrig-
erant.
If the SPB*H4 system must be opened for any kind of ser-
vice, such as compressor or drier replacement, you must
take extra precautions to prevent moisture from entering
the system. The following steps will help to minimize the
amount of moisture that enters the system during recovery
of HFC−410A.
1 − Use a regulator−equipped nitrogen cylinder to break
the system vacuum. Do not exceed 5 psi. The dry nitro-
gen will fill the system, and will help purge any mois-
ture.
2 − Remove the faulty component and quickly seal the sys-
tem (using tape or some other means) to prevent addi-
tional moisture from entering the system.
Page 26
Psig
°F
Psig
°F
178.5
94
290.8
125
181.6
95
295.1
126
184.3
96
299.4
127
187.7
97
303.8
128
190.9
98
308.2
129
194.1
99
312.7
130
197.3
100
317.2
131
200.6
101
321.8
132
203.9
102
326.4
133
207.2
103
331.0
134
210.6
104
335.7
135
214.0
105
340.5
136
217.4
106
345.3
137
220.9
107
350.1
138
224.4
108
355.0
139
228.0
109
360.0
140
231.6
110
365.0
141
235.3
111
370.0
142
239.0
112
375.1
143
242.7
113
380.2
144
246.5
114
385.4
145
250.3
115
390.7
146
254.1
116
396.0
147
258.0
117
401.3
148
262.0
118
406.7
149
266.0
119
412.2
150
270.0
120
417.7
151
274.1
121
423.2
152
278.2
122
428.8
153
282.3
123
434.5
154
286.5
124
440.2
155
Psig
445.9
451.8
457.6
463.5
469.5
475.6
481.6
487.8
494.0
500.2
506.5
512.9
519.3
525.8
532.4
539.0
545.6
552.3
559.1
565.9
572.8
579.8
586.8
593.8
601.0
608.1
615.4
622.7
630.1
637.5
645.0
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