Carrier Ecologic 30GX080 Series, Controls, Start-Up, Operation, Service, And Troubleshooting

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APPENDIX B (cont)
The following tables show the loading sequence for a
30GX350 chiller. Each compressor has 2 loaders and the chill-
er is configured for equal circuit loading. See Note 2.
NOTES:
1. Stages 3A and 7A are not used by the algorithm when increasing stages.
Stages 3 and 7 are not used by the algorithm when decreasing stages.
2. The loading sequence for 30GX281-325 units is the same as those shown
for the 30GX350 above.
STANDARD LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 4-COMPRESSOR UNIT)
STAGE
COMP
A1
LOADER
A1
LOADER
A2
COMP
A2
COMP
B1
LOADER
B1
LOADER
B2
COMP
B2
% TOTAL
CAPACITY
(50/50 Split)
0 0 0 0 0 0 0 0 0 0.0
1 1 0 0 0 0 0 0 0 10.0
2 1 1 0 0 0 0 0 0 18.0
3 1 1 1 0 0 0 0 0 25.0
4 1 1 0 0 1 1 0 0 35.0
5 1 1 1 0 1 1 0 0 43.0
6 1 1 1 0 1 1 1 0 50.0
7 1 1 0 1 1 1 1 0 60.0
8 1 1 0 1 1 1 0 1 70.0
9 1 1 1 1 1 1 0 1 85.0
10 1 1 1 1 1 1 1 1 100.0
CLOSE CONTROL LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 4-COMPRESSOR UNIT)
STAGE
COMP
A1
LOADER
A1
LOADER
A2
COMP
A2
COMP
B1
LOADER
B1
LOADER
B2
COMP
B2
% TOTAL
CAPACITY
(50/50 Split)
0 0 0 0 0 0 0 0 0 0.0
1 1 0 0 0 0 0 0 0 10.0
2 1 1 0 0 0 0 0 0 18.0
3 1 1 1 0 0 0 0 0 25.0
3A 1 0 0 0 1 0 0 0 20.0
4 1 0 0 0 1 1 0 0 28.0
5 1 1 0 0 1 1 0 0 35.0
6 1 1 1 0 1 1 0 0 43.0
7 1 1 1 0 1 1 1 0 50.0
7A 1 0 0 1 1 1 1 0 45.0
8 1 1 0 1 1 1 1 0 60.0
9 1 1 0 1 1 1 0 1 70.0
10 1 1 1 1 1 1 0 1 85.0
11 1 1 1 1 1 1 1 1 100.0
LEGEND
0 — Off
1 — On