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XC16 SERIES
Table 3. 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
Table 4. 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.
Temp. of air
entering
outdoor coil
5
F (
5
C)
−024
−036
−048
−060
Liquid
Suction
Liquid
Suction
Liquid
Suction
Liquid
Suction
First Stage (Low Capacity)
65 (18.3)
215
144
226
142
224
142
215
136
75 (23.9)
247
146
261
144
258
144
250
139
85 (29.4)
288
148
304
145
299
146
291
142
95 (35.0)
332
151
352
147
345
148
337
144
105 (40.6)
381
153
405
150
395
150
388
146
115 (46.1)
435
155
460
150
450
153
444
148
Second Stage (High Capacity)
65 (18.3)
225
140
228
144
235
135
220
130
75 (23.9)
258
142
262
146
269
137
256
133
85 (29.4)
301
144
306
148
313
139
299
136
95 (35.0)
346
146
353
150
361
141
347
138
105 (40.6)
397
149
405
151
412
143
402
141
115 (46.1)
452
151
462
154
471
146
462
143
*These are typical pressures only. Indoor indoor match up, indoor air quality, and indoor load will cause the pressures to vary.
System Operation
TWO−STAGE COMPRESSOR
The two−stage scroll compressor operates much like the
standard scroll compressor. The two−stage compressor
steps between low capacity and high capacity as required
to meet cooling demand. The steps occur when gas is
bypassed through a vent port in the first suction pocket.
This bypassing of gas allows the compressor to operate at
low capacity if thermostat demand allows, creating a more
cost effective and efficient compressor.
Full capacity is achieved by blocking the vent port with a
slider ring. The slider ring (vent port cover) is controlled by
a 24VDC
internal solenoid in the open position allowing low
capacity. When energized the internal solenoid closes the
slider ring, blocking the vent port and bringing the
compressor to full capacity. Stepping can occur during a
single thermostat demand as the motor runs continuously
while the compressor steps from low to full capacity.
