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19.10: Production and Harvest Guidelines
19.10.1 Harvest Cycle:
1. During “Harvest” time; the circulation pump and condenser fan outputs are disabled.
2. The compressor, hot gas, and drain valves are enabled.
3. The drain valve will remain enabled for 60 seconds before becoming disabled.
4. The fill valve will be enabled for 150 seconds before becoming disabled.
5. The compressor remains enabled.
6. All loads will remain in this state until the end of the harvest time (beginning of next
production time).
7. All harvest events will enable the grid cutter.
19.10.2 Production Cycle:
1. During the “Production” time; the circulation pump, condenser fan, and compressor are
enabled.
2. The fill valve and the drain valves are disabled.
19.10.3 Timed Operation for Harvest and Production:
1. The high side thermistor senses the temperature of the liquid line at the filter drier inlet.
2. If the bin thermistor senses a temperature at or below the “Stop Ice” set point, any
occurring production or harvest cycle will continue until the conclusion of the current
harvest (if already in harvest) or the following harvest (if currently in production). Once
either condition is met, the machine will go into the “Stop Ice” mode. Once this occurs
all loads will be disabled except for the grid cutter (35 minutes only). All loads will
remain disabled until the call for the next “Start Ice” set point is reached.
3. During a harvest event, a production event cannot start until the fill valve solenoid
(while in the harvest mode) completes its fill cycle.
4. The grid gutter enables at the beginning of a harvest event.
5. If “Clean” is selected on the user interface display, any production or harvest event will
immediately terminate and the clean event will begin.
6. If “Off” is selected on the user interface display, the event in progress will be stopped
and all loads disabled.
7. A “Power on Reset (POR)” will initiate a compressor reset time (compressor
inoperative).
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