KeepRite C4A6 Installation Instructions Manual - page 10
INSTALLATION INSTRUCTIONS
R−410A, Two−Stage Split System Air Conditioner
10
421 01 6002 01
Figure 11
Rating Plate (required) Subcooling Temperature
°
F (
°
C)
Measured Liquid
Pressure (psig)
°
F
(
°
C)
°
F
(
°
C)
°
F
(
°
C)
°
F
(°
C)
F
(°
C)
F
(
°
C)
6
3
8
4
10
6
12
7
14
8
16
9
R−410A Required Liquid Line Temperature
°
F (
°
C)
251
78
26
76
24
74
23
72
22
70
21
68
20
259
80
27
78
26
76
24
74
23
72
22
70
21
266
82
28
80
27
78
26
76
24
74
23
72
22
274
84
29
82
28
80
27
78
26
76
24
74
23
283
86
30
84
29
82
28
80
27
78
26
76
24
291
88
31
86
30
84
29
82
28
80
27
78
26
299
90
32
88
31
86
30
84
29
82
28
80
27
308
92
33
90
32
88
31
86
30
84
29
82
28
317
94
34
92
33
90
32
88
31
86
30
84
29
326
96
36
94
34
92
33
90
32
88
31
86
30
335
98
37
96
36
94
34
92
33
90
32
88
31
345
100
38
98
37
96
36
94
34
92
33
90
32
364
104
40
102
39
100
38
98
37
96
36
94
34
374
106
41
104
40
102
39
100
38
98
37
96
36
384
108
42
106
41
104
40
102
39
100
38
98
37
395
110
43
108
42
106
41
104
40
102
39
100
38
406
112
44
110
43
108
42
106
41
104
40
102
39
416
114
46
112
44
110
43
108
42
106
41
104
40
427
116
47
114
46
112
44
110
43
108
42
106
41
439
118
48
116
47
114
46
112
44
110
43
108
42
450
120
49
118
48
116
47
114
46
112
44
110
43
462
122
50
120
49
118
48
116
47
114
46
112
44
474
124
51
122
50
120
49
118
48
116
47
114
46
SEQUENCE OF OPERATION
With power supplied to indoor and outdoor units,
transformer is energized.
NOTE: For low−stage operation, the outdoor unit Comfort
Alert
UltraTech
is labeled Y and the indoor
unit/thermostat is labeled Y1.
On a call for low−stage cooling, the thermostat energizes Y1
(low−stage compressor) and G. The call for Y1 energizes
the contactor, starting the outdoor fan motor and low−stage
compressor. The compressor operates at part load. The
call for G energizes the indoor blower motor.
On a call for high−stage cooling, the thermostat energizes
Y1, Y2 and G. The call for Y1 energizes the contactor,
starting the outdoor fan motor and compressor. Five
seconds after the compressor starts, Y2 energizes the
compressor solenoid to load up the compressor to full
capacity. The call for G energizes the indoor blower
motor.
When the thermostat is satisfied, its contacts open,
de−energizing contactor and blower. Compressor and
motor stop.
NOTE: If indoor unit is equipped with a time−delay relay
circuit, the blower runs an additional length of time to
increase system efficiency.