Page 18
506083−01 03/08
Table 4. HFC−410A Normal Operating Pressures (10 and S5 psig)
IMPORTANT
Use this table to perform maintenance checks; it is not a procedure for
charging the system. Minor variations in these pressures may be due to
differences in installations. Significant deviations could mean that the system
is not properly charged or that a problem exists with some component in the
system.
TSA*H4
−036
−042
−048
−060
5
F (
5
C)*
Liquid / Suction
Liquid / Suction
Liquid / Suction
Liquid / Suction
Expansion Valve (TXV)
65 (18)
238 / 132
236 / 138
238 / 136
239 / 133
70 (21)
254 / 135
253 / 140
256 / 138
258 / 135
75 (24)
273 / 138
273 / 141
277 / 139
278 / 136
80 (27)
293 / 140
296 / 142
299 / 140
300 / 137
85 (29)
316 / 142
318 / 143
320 / 139
323 / 138
90 (32)
340 / 143
341 / 144
343 / 140
346 / 139
95 (35)
366 / 144
366 / 146
369 / 141
370 / 140
100 (38)
392 / 145
392 / 147
395 / 142
396 / 142
105 (41)
420 / 147
417 / 148
422 / 144
415 / 143
110 (43)
449 / 148
445 / 149
450 / 146
449 / 145
115 (45)
480 / 149
475 / 151
481 / 148
476 / 147
Table 5. HFC−410A Temperature (°F) − Pressure (Psig)
°F
Psig
°F
Psig
°F
Psig
°F
Psig
°F
Psig
°F
Psig
°F
Psig
°F
Psig
32
100.8
48
137.1
63
178.5
79
231.6
94
290.8
110
365.0
125
445.9
141
545.6
33
102.9
49
139.6
64
181.6
80
235.3
95
295.1
111
370.0
126
451.8
142
552.3
34
105.0
50
142.2
65
184.3
81
239.0
96
299.4
112
375.1
127
457.6
143
559.1
35
107.1
51
144.8
66
187.7
82
242.7
97
303.8
113
380.2
128
463.5
144
565.9
36
109.2
52
147.4
67
190.9
83
246.5
98
308.2
114
385.4
129
469.5
145
572.8
37
111.4
53
150.1
68
194.1
84
250.3
99
312.7
115
390.7
130
475.6
146
579.8
38
113.6
54
152.8
69
197.3
85
254.1
100
317.2
116
396.0
131
481.6
147
586.8
39
115.8
55
155.5
70
200.6
86
258.0
101
321.8
117
401.3
132
487.8
148
593.8
40
118.0
56
158.2
71
203.9
87
262.0
102
326.4
118
406.7
133
494.0
149
601.0
41
120.3
57
161.0
72
207.2
88
266.0
103
331.0
119
412.2
134
500.2
150
608.1
42
122.6
58
163.9
73
210.6
89
270.0
104
335.7
120
417.7
135
506.5
151
615.4
43
125.0
59
166.7
74
214.0
90
274.1
105
340.5
121
423.2
136
512.9
152
622.7
44
127.3
60
169.6
75
217.4
91
278.2
106
345.3
122
428.8
137
519.3
153
630.1
45
129.7
61
172.6
76
220.9
92
282.3
107
350.1
123
434.5
138
525.8
154
637.5
46
132.2
62
175.4
77
224.4
93
286.5
108
355.0
124
440.2
139
532.4
155
645.0
47
134.6
78
228.0
109
360.0
140
539.0
INSTALLING SERVICE VALVE CAPS
Disconnect gauge set and install all service valve caps for
both the liquid and suction line valves.
INSTALL CAPS
OUTDOOR UNIT
SERVICE VALVES
Figure 32. Installing Service Valve Caps
System Operation
The outdoor unit and indoor blower will cycle on and off as
dictated by demands from the room thermostat. When the
thermostat’s blower switch is in the
ON
position, the indoor
blower will operate continuously.
HIGH PRESSURE SWITCH
TSA*H4 units are equipped with a high-pressure switch
that is located in the liquid line of the compressor. The
switch (SPST, manual reset, normally closed) removes
power from the compressor when discharge pressure
rises above factory setting at 590 + 10 psi.
