(Capacity Loading Sequence) - Carrier ComfortLink 6 Series Controls, Start-Up, Operation, Service, And Troubleshooting

Capacity Loading Sequence Example —
lowing tables show the loading sequence for a 30HX186
(50/50 split) and a 30HX161 (59/41 split) chiller. Each
STANDARD LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 2-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1
0 0
1 1
2 1
3 1
4 1
5 1
6 1
CLOSE CONTROL LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 2-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1
0 0
1 1
2 1
3 1
3A 1
3B 1
4 1
5 1
6 1
LEGEND
0 — Off
1 — On
NOTES:
1. Stage 3A (and 3B for 59/41 split) is not used by the algorithm
when increasing stages. Stage 3 (and 2 for a 59/41 split) is not
used when decreasing stages.
2. The % Total Capacities above are calculated based on compres-
sor nominal tons. For the case of the 59/41 split above, the 30HX
uses compressors with flow rates of 250 and 174 cfm (from com-
pressor model numbers 06N__250 and 06N__174), which repre-
sent nominal tons of 80 and 56 (respectively) at 60 Hz. A factor of
40% is used when no loaders are energized, and a factor of 70%
is used when Loader 1 is energized. The capacity shown for
Stage 3B above is calculated as follows:
% Total Capacity = [(0.40 x 80 + 0.70 x 56)/(80 + 56)] x 100%
= 52.4 %
The fol-
LOADER COMP
A1 A2 B1
0 0 0
0 0 0
1 0 0
1 1 0
1 0 1
1 0 1
1 1 1
LOADER COMP
A1 A2 B1
0 0 0
0 0 0
1 0 0
1 1 0
0 0 1
0 0 1
0 0 1
1 0 1
1 1 1
APPENDIX B
compressor has 2 loaders. There is no difference in operation
between "Staged" and "Equal" circuit loading on 2 compressor
chillers.
LOADER LOADER
B1 B2
0 0
0 0
0 0
0 0
1 0
1 1
1 1
LOADER LOADER
B1 B2
0 0
0 0
0 0
0 0
0 0
1 0
1 1
1 1
1 1
COMPRESSOR
PART NO.
06N__123
06N__146
06N__174
06N__209
06N__250
06N__300
85
% TOTAL % TOTAL
CAPACITY CAPACITY
(50/50 Split) (59/41 Split)
0.0
20.0 23.5
35.0 41.1
50.0 58.8
70.0 70.0
85.0 82.4
100.0 100.0
% TOTAL % TOTAL
CAPACITY CAPACITY
(50/50 Split) (59/41 Split)
0.0
20.0 23.5
35.0 41.1
50.0 58.8
40.0 40.0
55.0 52.4
70.0 64.7
85.0 82.4
100.0 100.0
Nominal Tons
60 Hz NOM. 50 Hz NOM.
TONS TONS
39
46
56
66
80
—
0.0
0.0
—
39
46
56
66
80