ELECTRICAL CIRCUIT
CIRCUIT DESCRIPTION
As the manual
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.
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.
POWER RELAY / CONTACTOR
This relay controls the compressor power only.
GEARMOTOR DELAY THERMOSTAT
This thermostat keeps the gearmotor running until the suction line temperature reaches 45_ after the full bin switch terminates power to the power relay / 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.
FAN CYCLING SWITCH (R404a Units)
The function of this switch is to maintain condensing pressures at a satisfactory level
HIGH PRESSURE CONTROL
The high pressure cut out is electrically in series with the power relay. As the head pressure rises to 450 PSIG for R404a charged units and 400 PSIG for R 22 charged units, a preset level, the contact opens thus breaking the circuit to the compressor via the power relay contactor. This control must be reset manually on R404a units.
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