Vulcan-Hart C24EA3 480V PRO, C24EA5 480V BASIC Electrical Operation, Component Function

MODEL C24EA - ELECTRICAL OPERATION

ELECTRICAL OPERATION

COMPONENT FUNCTION

Water Level Control (WLC) Board	Controls water level by monitoring conditions of the three water
	level probes H, L and LLCO.

Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Creates audible signal when timed cook cycle is complete.

Contactor, Limiting . . . . . . . . . . . . . . . . . . . . . Connects one side of heating elements to incoming power. Energized whenever WLC (LLCO) coil is energized.

Contactor, Regulating . . . . . . . . . . . . . . . . . . . Connects one side of heating elements to power. On constantly during cooking cycle.

Drain Valve, Motorized (Ball type) . . . . . . . . . . (Professional models only) Motorized control for opening and closing drain valve.

Element, Heating	Located in steam generator tank. Heats water to produce steam.
Element, Super-heater	(Professional models only) Located in piping from steam
	generator tank to cooking chamber. Provides additional energy
	to raise steam temperature.
Fuse, (1FU)	Slow blow 4A fuse. Located on primary side of main
	transformer. Protects control circuitry from over-currents.
Fuse, (2FU)	Slow blow 4A fuse. Located on primary side of main
	transformer. Protects control circuitry from over-currents.

Lamp (3LT), Power . . . . . . . . . . . . . . . . . . . . .

Lamp (2LT), Cook . . . . . . . . . . . . . . . . . . . . . .

Lamp (1LT), Ready . . . . . . . . . . . . . . . . . . . . .

Amber (AM) colored lamp. On when power switch is on.

Red (RD) colored lamp (Professional models only). On when hold thermostat is satisfied and door is closed and timer is set.

Green (GN) colored lamp (Professional models only). On when cycling thermostat is satisfied. Latches on when hold thermostat is satisfied.

Probe (H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High water level probe connected to internal latch relay circuit. Water must reach this level before internal latch relay is energized.

Probe (L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low water level probe connected to internal latch relay circuit.

Probe (LLCO) . . . . . . . . . . . . . . . . . . . . . . . . . . Low Level Cut-Off (LLCO) probe. Controls power to heating and timer circuitry. Controls fast fill solenoid (Professional models only).

Relay (K1)	Controlled by hold thermostat. Enables timer circuit.
Relay (K2), LLCO	Low Level Cut-Off (LLCO) external relay. Only energized during
	drain. Controls Flush, Fast Fill and Vacuum Relief solenoids.

Relay (K3), Drain Relay . . . . . . . . . . . . . . . . . . Controlled by Time Delay Relay. Only energized during drain cycle. Controls WLC board and LLCO relay K2 during drain. Disables heating and timer circuitry.

Relay (K4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (Professional models only) Latches Ready light on. Allows power to superheater.

Relay, Time Delay	Controlled by the power switch. Output becomes active for 90
	seconds when power switch is turned to off. Only used during
	drain cycle.

Solenoid (1SOL), Cooling . . . . . . . . . . . . . . . . Controlled by the condensate thermostat. Mixes cold water with hot condensate water from cooking chamber to reduce water temperature at drain.

Solenoid (2SOL), Flush . . . . . . . . . . . . . . . . . . On only during drain cycle. Mixes cold water with tank water before entering drain box. Keeps drain hose clear of debris.

Solenoid (3SOL), Fast Fill . . . . . . . . . . . . . . . . Initial tank fill for Professional machines. Used during last stage of drain cycle to flush drain opening free of debris.

F25213 (May 2006) Page 36 of 52