Carrier ComfortLink 30GXN - Page 88

88
APPENDIX B (cont)
The following tables show the loading sequence for a 30GXN,R350 chiller.
Each compressor has 2 loaders and the chiller is configured for equal circuit
loading.SeeNote2.
LEGEND
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 30GXN,R281-325 units is the same as those
shown for the 30GXN,R350 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 00 0000 00 0.0
1 10 0000 00 10.0
2 11 0000 00 18.0
3 11 1000 00 25.0
4 11 0011 00 35.0
5 11 1011 00 43.0
6 11 1011 10 50.0
7 11 0111 10 60.0
8 11 0111 01 70.0
9 11 1111 01 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 00 0000 00 0.0
1 10 0000 00 10.0
2 11 0000 00 18.0
3 11 1000 00 25.0
3A 10 0010 00 20.0
4 10 0011 00 28.0
5 11 0011 00 35.0
6 11 1011 00 43.0
7 11 1011 10 50.0
7A 10 0111 10 45.0
8 11 0111 10 60.0
9 11 0111 01 70.0
10 11 1111 01 85.0
11 1 1 1 1 1 1 1 1 100.0
0 — Off
1 —On