Operation Of The Cnm Series Cuber; Freeze Cycle; Harvest Cycle; Cnm Control Board - Cornelius NORDIC ELITE Series Owner's Manual

Installation Guide and Owner's Manual
O CNM S C
PERATION OF THE ERIES UBER

Freeze Cycle

A quick press and release of the ON/OFF button will start operation of the unit. The Water Inlet Valve is energized.
Once the HI Water Float is in the open position the Water Inlet is de-energized. The Hot Gas Valve will open for 5 sec-
onds. The Compressor will be energized and 5 seconds later the Hot Gas Valve will close, starting the Pre-chill of the
Evaporator. The Fan Motor (if applicable) will start once the Fan Control closes. After the Pre-chill ends, the Water
Pump will be energized. Water is now flowing across the Evaporator.
When the water temperature reaches a predetermined factory set point (near freezing), the unit will perform a 20 sec-
ond shut down of the Water Pump to assist in Anti-Slush of the water in the Sump. At the conclusion of Anti-Slush, the
unit will continue in freeze mode until the Low Water Float is satisfied (closes), indicating the formation of a full slab of
Ice on the Evaporator and will start the harvest Cycle.

Harvest Cycle

The Fan Motor shuts down as the Hot Gas Valve, Purge Valve and Water Inlet Valve are energized. The Water Inlet
Valve will stay energized for additional time after the Purge Valve closes, partially filling the Water Sump.
The unit continues in this mode until the Harvest Assist Assembly helps push the ice slab from the plate and the con-
tacts in the Curtain Switch open as the slab drops into the bin. If the Curtain Switch remains open after the factory
preset time in the Harvest Cycle, the unit will shut down on a full bin. If the Curtain opens and closes with the harvest
of the ice, the unit will restart the next freeze cycle.
Proper bridge thickness, when measured at the middle of the slab, on the CIM units is approximately 3/16" thick for
units less than 400 lbs. and 1/8" for 400 lbs. and above.

CNM Control Board

Figure 9.
Publication Number: 548000033 - 12 - © 2018, Cornelius Inc.