Carrier ComfortLink 6 Series Controls, Start-Up, Operation, Service, And Troubleshooting page 89

Each compressor has 2 loaders and the chillers are configured for staged circuit
loading. See Note 2.
STANDARD LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 4-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1 A1
0 0
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
CLOSE CONTROL LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 4-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1 A1
0 0
1 1
2 1
3 1
3A 1
4 1
5 1
6 1
7 1
8 1
8A 1
9 1
10 1
LEGEND
0 — Off
1 — On
NOTES:
1. Stages 3A and 8A are not used by the algorithm when increasing stages.
Stages 3 and 8 are not used by the algorithm when decreasing stages.
2. The loading sequence for 30GXN,R281-325 units is the same as those
shown for the 30GXN,R350 above.
APPENDIX B (cont)
The following tables show the loading sequence for a 30GXN,R350 chiller.
LOADER COMP
A2 A2
0 0 0
0 0 0
1 0 0
1 1 0
1 0 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
LOADER COMP
A2 A2
0 0 0
0 0 0
1 0 0
1 1 0
0 0 1
1 0 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
1 1 1
COMP LOADER LOADER
B1 B1
0 0
0 0
0 0
0 0
0 0
0 0
1 1
1 1
1 1
1 1
COMP LOADER LOADER
B1 B1
0 0
0 0
0 0
0 0
0 0
0 0
0 0
1 0
1 1
1 1
1 0
1 1
1 1
89
% TOTAL
COMP
CAPACITY
B2 B2
(50/50 Split)
0 0
0 0 10.0
0 0 18.0
0 0 25.0
0 0 35.0
0 0 50.0
0 0 68.0
1 0 75.0
0 1 85.0
1 1 100.0
% TOTAL
COMP
CAPACITY
B2 B2
(50/50 Split)
0 0
0 0 10.0
0 0 18.0
0 0 25.0
0 0 20.0
0 0 35.0
0 0 50.0
0 0 60.0
0 0 68.0
1 0 75.0
0 1 70.0
0 1 85.0
1 1 100.0
0.0
0.0