CME1356R and CME1656R
How The Electronic Cuber Works
Water System:
Freeze:
The water pump forces water to the top of the evaporators. The
At the point where the cubes are fully formed, the water level sensor indicates to the AutoIQ Controller that it is time to begin the Harvest cycle.
Harvest:
At the beginning of Harvest, the water pump shuts off and the purge valve opens. The purge valve remains open for 74 seconds. No water will drain until the water pump restarts. The water pump will start at a variable time depending upon the amount of water rinse that has been set.
After the purge valve has closed, the inlet water valve opens and water flows into the ice machine. The water valve will NOT be open the complete length of the harvest cycle.
The inlet water valve will “top off” the reservoir at the beginning of the next freeze cycle.
The AutoIQ Controller operates the ice machine by monitoring several input measures and switching various loads on and off.
Controller Inputs:
1.Reservoir water temperature. This is measured by a thermistor located in the water pump outlet.
2.Discharge line temperature. This is measured by a thermistor located on the compressor discharge line.
3.Water level. This is measured by an infrared sensor and float. The float rises and falls with the water level, and switches the sensor on and off as it moves.
4.Bin fill level. This is measured by a set of electric eyes in the cube outlet port. If ice fills the bin, it will block the “eyes".
Some units are equipped with a bin thermostat, those units use the thermostat to switch the machine on and off. The electric eyes in the cube outlet port will also control the machine if the bin thermostat sticks in an ON position.
5.Time. The controller measures and compares how long it takes for various events to happen. It stores that data for future reference.
Controller Outputs:
A. 24 volt:
1. Lights
2. Inlet water valve
3. Hot Gas Valve
4. Contactor Coil
5. Harvest Bypass Valve Coil
B. High Voltage
1. Water Pump
2. Purge Valve
May 2001
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