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Henny Penny
Electric Heat System Theory of Operation
Purpose
The F5 electric heat system uses electrical power applied through a heating element to raise the
cooking oil temperature when demanded by a user and the control system. Incoming to the elec-
tric heat system is three-phase electrical power, safety circuit checks, and temperature probe
readings. Outputs of the electric heat system are 24 volts DC to safety and heat contactor coils,
three-phase electrical power to the heating element, and heating of the cooking oil. The F5 elec-
tric heat system consists of:
Inputs
l
Three-phase electrical power to safety contactor
l
PMU safety circuits
l
Oil temperature RTD probe readings first by each PMU
l
Outputs
l
24 volts DC to safety contactor coil when main power switch is toggled ON
l
Three-phase electrical power to heat contactor
l
24 volts DC to heat contactor coil when control system demands heat
l
Three-phase electrical power to the heating element
l
Heating of cooking oil
l
Electric Heat System Theory
F5/ LOV 300Open Fryer
25
FM06-077 A 2023
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