Cornelius IAC227 Instrukcja Użytkownika Pobierz pdf (Strona 13)

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ELECTRICAL CIRCUIT

CIRCUIT DESCRIPTION

As the manual on-off-circuit breaker switch is pushed to ”on”, an electrical circuit is completed to the gearmotor

via the circuit breaker gearmotor overload, power relay / contactor, gearmotor delay thermostat and the bin

thermostat. After the previous circuit has been completed the fan motor will start when the head pressure

reaches 270 PSI and will cycle off at 205 PSI. The compressor will start via the high pressure control and the

compressor starting relay.

COMPONENT DESCRIPTION

BIN THERMOSTAT

This is electrically in ”series” with the ice making system. when the bin is full, the contact opens, terminating

power to the machine.

CAUTION: Setting the bin thermostat to the coldest position may cause excessive ice

build-up in the chute and it can possibly cause the chute to pop-off from ice build-up.

GEARMOTOR START RELAY

This is a current type relay which means as the gearmotor run winding comes ”on” the line, the current draw

initially is relatively heavy through the relay coil (coil is in series with run winding). It then acts like a normal

relay and the N.O. start contact ”makes”, completing a circuit through the start capacitor to the start winding.

As the gearmotor picks up speed, the amp draw through the relay coil drops off allowing the armature to return

to its normal position (start contact ”opens”). This action removes the start winding from the circuit.

COMPRESSOR CONTACTOR

Controls the compressor input power only.

GEARMOTOR DELAY THERMOSTAT

The purpose of the Delay Thermostat is to allow an electrical path to the gearmotor for continuous operation to

clear the evaporator of ice to prevent auger freeze up. As the ice from the evaporator is augered up, the suction

line of the evaporator will warm-up causing the Delay Thermostat to open, cancelling the gearmotor electrical

circuit.

CAUTION: The Delay Thermostat must be insulated to prevent biasing action of room and compressor area

temperatures.

This thermostat keeps the gearmotor running until the suction line temperature reaches 45_ F after the bin

thermostat terminates power to the contactor.

ON–OFF SWITCH / CIRCUIT BREAKER

This switch interrupts power to the entire unit. The switch has a circuit breaker incorporated into its’ design.

This circuit breaker will trip out in the event the gearmotor draws to high of amps In such an event the power is

interrupted to the unit. To reset the circuit breaker and reestablish power to the unit, push the switch to the ”off”

position and then back to the ”on” position.

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Cornelius IAC227 Instrukcja Użytkownika Strona 13