9 166240010
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 ther-
mostat. After the previous circuit has been completed the condenser fan motor will start as will the compressor
(via the high pressure control, the compressor starting relay and low ambient control).
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 inter-
rupted to the unit. To reset the circuit breaker and reestablish power to the unit, push the switch to the “off” posi-
tion and then back to the “on” position.
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.
HIGH PRESSURE CONTROL
Switch contact will open at 450 PSI for R404a breaking the circuit to the compressor. This control is manually
resetable.
GEARMOTOR START RELAY
This is a current type relay which means as the gearmotor run winding comes ”on” the line, the current draw ini-
tially 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.
FAN CYCLING SWITCH
The function of this switch is to maintain condensing pressures at a satisfactory level during--low ambient condi-
tions. The switch breaks the circuit to the condenser fan motor at 205 PSI and makes the circuit at 275 PSI.
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.
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