Carrier Ecologic 30GX080-265 Controls, Start-Up, Operation, Service, And Troubleshooting page 79

The following tables show the loading sequence for 30HX206
(57/43 split) and 30HX271 (67/33 split) chillers. All com-
pressors have two loaders and the chiller is configured for
STANDARD LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 3-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1
0 0
1 1
2 1
3 1
4 1
5 1
6 1
7 1
CLOSE CONTROL LOADING SEQUENCE (CIRCUIT A LEAD CIRCUIT, 3-COMPRESSOR UNIT)
COMP LOADER
STAGE
A1
0 0
1 1
2 1
3 1
3A 1
4 1
5 1
6 1
7 1
8 1
LEGEND
0 — Off
1 — On
NOTES:
1. Stage 3A is not used by the algorithm when increasing stages.
Stage 3 is not used by the algorithm when decreasing stages.
2. The % Total Capacities above are calculated based on compres-
sor nominal tons. For the case of the 57/43 split above, the 30HX
uses compressors with flow rates of 209, 123 and 250 cfm (from
compressor model numbers 06N_1209, 06N_123 and 06N_1250),
APPENDIX B (cont)
LOADER COMP
A1 A2 A2
0 0 0
0 0 0
1 0 0
1 1 0
1 0 1
1 1 1
1 1 1
1 1 1
LOADER COMP
A1 A2 A2
0 0 0
0 0 0
1 0 0
1 1 0
0 0 1
1 0 1
1 1 1
1 1 1
1 1 1
1 1 1
staged circuit loading. Loaders A1 on compressors A1 and
A2 are energized in parallel. The same is true for Loaders
A2 on both compressors A1 and A2. See Note 3.
COMP LOADER LOADER
B1 B1 B2
0 0
0 0
0 0
0 0
0 0
0 0
1 1
1 1
COMP LOADER LOADER
B1 B1 B2
0 0
0 0
0 0
0 0
0 0
0 0
0 0
1 0
1 1
1 1
which represent nominal tons of 66, 39 and 80 (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 4 above is calculated as follows:
% Total Capacity = [0.70 x 66 + 0.70 x 39 + 0.0 x 80)/(66 + 39 +
80)] x 100% = 39.7%
3. The loading sequence for 30GX205-265 units is the same as those
shown for the 30HX206,271 above.
79
% TOTAL % TOTAL
CAPACITY CAPACITY
(57/43 Split) (67/33 Split)
0 0.0
0 14.3
0 25.0
0 35.7
0 39.7
0 56.8
0 87.0
1 100.0
% TOTAL % TOTAL
CAPACITY CAPACITY
(57/43 Split) (67/33 Split)
0 0.0
0 14.3
0 25.0
0 35.7
0 22.7
0 39.7
0 56.8
0 74.1
0 87.0
1 100.0
0.0
13.3
23.3
33.3
46.7
66.7
90.0
100.0
0.0
13.3
23.3
33.3
26.7
46.7
66.7
80.0
90.0
100.0