Bin Control; Gearmotor - Cornelius UC 701 SERIES Installation And Service Manual

UC 701 Series Continuous Flow Icemaker Installation and Service Manual
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IN ONTROL
The type of bin control used on all UC Models is thermostatically controlled. The switch itself is inside the electrical
box of the Dispenser and can be serviced from the front of the unit. The cap tube bulb is located in the thermostat
well directly under the ice inlet.
To test switch, disconnect power to unit and remove one wire from switch. Connect both leads of your ohmmeter to
the Bin Control Switch terminals. With control bulb at room temperature ohmmeter should read "Closed Circuit".
Now cover the control bulb with ice, within 1 minute switch should "click" and ohmmeter should read "Open Circuit."
The Bin control is in electrical series with a 24 volt transformer located in the ice dispenser and a 24 volt control
relay located in the Icemaker.
The Bin 24 volt control relay is in electrical series with coil on antifreeze relay along with the low water safety. If unit
is water cooled, the condenser high pressure cut out is also in series.
The Control Switch is held in place inside electrical box by 2 screws. Control bulb is positioned under ice chute and
can be replaced by removing the capillary from the thermostat well.
The most important thing to remember when replacing probe is to be careful not to cut or kink probe and be sure
sensor bulb is located in a position to shut unit down before ice reaches ice chute.
This icemaker is equipped with a safety ice level sensor. This sensor control is located on top of theevaporator.This
switch is also in electrical series with the anti-freeze relay and other safety circuitry.
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EARMOTOR
The gearmotor is equipped with a start relay and a manual reset overload.
When current is applied, the relay energizes and completes the circuit to the start winding. The motor reaches a
predetermined speed and the relay drops out, disconnecting the start winding. The run winding remains in the
circuit as long as current is applied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the
transmission, an overload condition within the evaporator or an electrical malfunction. It does this by sensing
amperage draw. If the motor stalls the start relay would energize and stay energized. The amperage would surge 5
to 6 times greater than the normal draw. In this event the overload would shut off the transmission in 4 to 8
seconds.
If the motor is subjected to an abnormal load, but does not reach a stall condition, the overload will react, but over
a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.
Publication Number: 630460150 - 14 - © 2000-2012, IMI Cornelius Inc.