Carrier 48AJ Operating And Service Manual page 52
Single package large rooftop units with scroll compressors and comfort link version 4.x controls
Hide thumbs
Also See for 48AJ:
- Installation instructions manual (36 pages) ,
- Operation and service manual (190 pages) ,
- Started manual (178 pages)
Table of Contents
Advertisement
Table 65 — Staged Gas Heat Control Steps (Configuration
Heat 1
STAGE
MBB-RLY8
IGC1
0
OFF
1
ON
2
ON
3
OFF
4
OFF
5
ON
6
ON
7
ON
Table 66 — Staged Gas Heat Control Steps (Configuration
Heat 1
STAGE
MBB-RLY8
IGC1
0
OFF
1
ON
2
ON
3
ON
4
ON
5
ON
6
ON
7
ON
8
ON
9
ON
Table 67 — Staged Gas Heat Control Steps (Configuration
Heat 1
STAGE
MBB-RLY8
IGC1
0
OFF
1
ON
2
ON
3
ON
4
ON
5
ON
6
ON
7
ON
8
ON
9
ON
10
ON
11
ON
RELAY OUTPUT
Heat 2
Heat 3
MBB-RLY7
SCB-RLY1
MGV1
IGC2
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
RELAY OUTPUT
Heat 2
Heat 3
MBB-RLY7
SCB-RLY1
MGV1
IGC2
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
RELAY OUTPUT
Heat 2
Heat 3
MBB-RLY7
SCB-RLY1
MGV1
IGC2
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
→
→
Heat
Heat 4
Heat 5
SCB-RLY2
SCB-RLY3
MGV2
IGC3
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
→
→
Heat
Heat 4
Heat 5
SCB-RLY2
SCB-RLY3
MGV2
IGC3
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
→
→
Heat
Heat 4
Heat 5
SCB-RLY2
SCB-RLY3
MGV2
IGC3
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
52
→
SG.CT
HT.ST = 2)
Heat 6
CAPACITY
%
SCB-RLY4
MGV3
OFF
OFF
25
OFF
33
OFF
50
OFF
67
OFF
75
OFF
83
OFF
100
→
SG.CT
HT.ST = 3)
Heat 6
CAPACITY
%
SCB-RLY4
MGV3
OFF
OFF
25
OFF
33
OFF
50
OFF
58
OFF
67
OFF
75
OFF
83
OFF
92
OFF
100
→
SG.CT
HT.ST = 4)
Heat 6
CAPACITY
%
SCB-RLY4
MGV3
OFF
OFF
19
OFF
25
OFF
38
OFF
44
ON
50
OFF
57
OFF
63
OFF
76
OFF
88
OFF
94
ON
100
0
0
0
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
