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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
. See Note 2.
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
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
0
— Off
1
— On