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Carrier WEATHERMAKER 48/50AJ Operation And Service Manual page 44

Single package large rooftop units with comfortlink version 5.x controls
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STAGE
0
1
COMP
A1
OFF
ON*
A2
OFF
OFF
B1
OFF
OFF
UNIT
020
0%
18%
025
0%
17%
027
0%
21%
*With Minimum Load Valve ON.
STAGE
0
COMP
A1
OFF
ON
A2
OFF
OFF
B1
OFF
OFF
B2
OFF
OFF
UNIT
030
0%
23%
035,036
0%
22%
040,041
0%
21%
050
0%
23%
051
0%
25%
060
0%
24%
Table 54 — Staging Sequence with Hot Gas Bypass — 48/50AK,AY030-060
STAGE
0
1
COMP
A1
OFF
ON*
A2
OFF
OFF
B1
OFF
OFF
B2
OFF
OFF
UNIT
030
0%
12%
035,036
0%
12%
040,041
0%
13%
050
0%
16%
051
0%
19%
060
0%
19%
*With minimum load valve ON.
Table 55 — 2-Stage Sequence —
48/50A2,A4020-027
SEQUENCE 1
STAGE
0
1
Thermostat Inputs
Y1
OPEN CLOSED CLOSED OPEN CLOSED CLOSED
Y2
OPEN
OPEN
CLOSED OPEN
COMP
Compressor Status
A1
OFF
ON
A2
OFF
OFF
B1
OFF
OFF
UNIT
Unit Capacity
020
0%
30%
100%
025
0%
33%
100%
027
0%
33%
100%
Table 52 — Staging Sequence with Hot Gas Bypass —
48/50AK,AY020-027 and Multi-Stage 48/50AJ,AW020-027
SEQUENCE 1
2
3
Compressor Status
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
Unit Capacity 48/50A
33%
67%
67%
30%
65%
70%
33%
67%
67%
Table 53 — Staging Sequence without Hot Gas Bypass —
48/50AK,AY030-060 and Multi-Stage 48/50AJ,AW030-060
SEQUENCE 1
1
2
3
Compressor Status
ON
OFF
ON
ON
ON
ON
OFF
ON
ON
OFF
OFF
OFF
Unit Capacity 48/50A
45%
50%
73%
48%
52%
74%
43%
50%
71%
46%
46%
68%
50%
50%
75%
50%
50%
74%
SEQUENCE 1
2
3
4
Compressor Status
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
OFF
Unit Capacity 48/50A
23%
45%
50%
22%
48%
52%
21%
43%
50%
23%
46%
46%
25%
50%
50%
24%
50%
50%
SEQUENCE 2
2
0
1
Thermostat Inputs
OPEN
CLOSED
Compressor Status
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
OFF
OFF
ON
Unit Capacity
0%
30%
100%
0%
33%
100%
0%
33%
100%
4
5
0
ON
OFF
ON
OFF
ON
OFF
100%
0%
100%
0%
100%
0%
4
5
0
ON
OFF
ON
OFF
ON
OFF
ON
OFF
100%
0%
100%
0%
100%
0%
100%
0%
100%
0%
100%
0%
5
6
0
ON
ON
OFF
OFF
ON
ON
OFF
ON*
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
73%
100%
0%
12%
74%
100%
0%
16%
71%
100%
0%
13%
68%
100%
0%
16%
75%
100%
0%
19%
74%
100%
0%
21%
Table 56 — 2-Stage Sequence —
STAGE
2
0
Thermostat Inputs
Y1
OPEN CLOSED CLOSED OPEN CLOSED CLOSED
Y2
OPEN
COMP
Compressor Status
A1
OFF
A2
OFF
B1
OFF
B2
OFF
UNIT
030
0%
035
0%
040
0%
050
0%
060
0%
44
SEQUENCE 2
1
2
3
Compressor Status
OFF
OFF
ON
ON*
ON
ON
OFF
OFF
OFF
Unit Capacity 48/50A
18%
33%
67%
22%
35%
65%
21%
33%
67%
SEQUENCE 2
1
2
3
Compressor Status
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
Unit Capacity 48/50A
23%
45%
50%
26%
48%
48%
21%
43%
50%
23%
46%
54%
25%
50%
50%
26%
50%
50%
SEQUENCE 2
1
2
3
4
Compressor Status
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
Unit Capacity 48/50A
23%
45%
50%
26%
48%
48%
21%
43%
50%
23%
46%
54%
25%
50%
50%
26%
50%
50%
48/50A2,A4030-060
SEQUENCE 1
1
2
0
Thermostat Inputs
OPEN
CLOSED OPEN
Compressor Status
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
Unit Capacity
50%
100%
0%
50%
100%
0%
50%
100%
0%
50%
100%
0%
50%
100%
0%
4
5
ON
ON
OFF
ON
ON
ON
67%
100%
65%
100%
67%
100%
4
5
ON
ON
ON
ON
OFF
ON
ON
ON
73%
100%
74%
100%
72%
100%
77%
100%
75%
100%
76%
100%
5
6
ON
ON
ON
ON
OFF
ON
ON
ON
73%
100%
74%
100%
72%
100%
77%
100%
75%
100%
76%
100%
SEQUENCE 2
1
2
OPEN
CLOSED
OFF
ON
ON
ON
OFF
ON
ON
ON
Unit Capacity
50%
100%
50%
100%
50%
100%
50%
100%
50%
100%
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