SEQUENCE OF OPERATION
Power Supply
Heating Circuit
Electrical power is supplied to the unit by a 3 conductor service for single phase.
120VAC
Black conductor is hot. White conductor is neutral.
Green and yellow conductor is ground.
Power is permanently supplied to the main power switch.
Closing the main power switch supplies voltage to the power board and user interface.
Temperature is set through the user interface which then intermittently supplies 120VAC to the heater plates. Temperature is then controlled by the thermocouples sending a reference signal back to the user interface.
Holding Cabinet – Service Manual | 5 |
