(Capacity Loading Sequence) - Carrier Ecologic 30GX080-265 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
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
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 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_1250 and 06N_1174), 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 LOADER
A1 A2
0 0
0 0
1 0
1 1
1 0
1 0
1 1
LOADER LOADER
A1 A2
0 0
0 0
1 0
1 1
0 0
0 0
0 0
1 0
1 1
APPENDIX B
compressor has 2 loaders. There is no difference in opera-
tion between ''Staged'' and ''Equal'' circuit loading on 2 com-
pressor chillers.
COMP LOADER LOADER
B1 B1
0 0
0 0
0 0
0 0
1 1
1 1
1 1
COMP LOADER LOADER
B1 B1
0 0
0 0
0 0
0 0
1 0
1 1
1 1
1 1
1 1
COMPRESSOR
PART NO.
06N_1123
06N_1146
06N_1174
06N_1209
06N_1250
06N_1300
77
% TOTAL
CAPACITY
B2
(50/50 Split)
0 0.0
0 20.0
0 35.0
0 50.0
0 70.0
1 85.0
1 100.0
% TOTAL
CAPACITY
B2
(50/50 Split)
0 0.0
0 20.0
0 35.0
0 50.0
0 40.0
0 55.0
1 70.0
1 85.0
1 100.0
Nominal Tons
60 Hz NOM.
TONS
39
46
56
66
80
—
% TOTAL
CAPACITY
(59/41 Split)
0.0
23.5
41.1
58.8
70.0
82.4
100.0
% TOTAL
CAPACITY
(59/41 Split)
0.0
23.5
41.1
58.8
40.0
52.4
64.7
82.4
100.0
50 Hz NOM.
TONS
—
39
46
56
66
80