Frymaster 1824G, 2424G manual Pilot System Configuration, Electronic Ignition Configuration

24G SERIES FLATBOTTOM GAS FRYERS CHAPTER 1: SERVICE PROCEDURES

An electromechanical gas valve regulates gas flow to the manifold. 24G Series Flatbottom gas fryers are equipped with either a 120-volt valve system (standing pilot) or a 24-volt valve system (electronic ignition or CE standing pilot). Units may be configured with either a pilot ignition system (standing pilot) or an electronic ignition system (direct spark ignition).

Pilot System Configuration

The pilot system is comprised of the pilot orifice, pilot hood, and a thermocouple. The pilot serves two purposes. The first is to light the burner, the second is to heat the thermocouple. In operation, the thermocouple is in contact with the pilot flame and generates millivolts. The millivolt output energizes the gas valve pilot coil, which in turn opens the pilot valve. If the pilot flame is extinguished, voltage is lost to the gas valve pilot coil and the pilot valve closes. The gas valve is constructed so that the main valve will not open if the pilot valve is not open. The pilot flame must be manually lit when the fryer is first placed into operation. A separate circuit, activated by the fryer ON/OFF switch, provides voltage through the Thermatron temperature controller to the gas valve main coil, which opens the main valve.

					Main Coil
					Gas
					Valve
					Pilot Coil
				Thermocouple
				High-Limit
	14	NC	RELAY	Thermostat
	12 13	COM		Pilot
		NO
	10 11	PROBE
	9	1A	EXT POT
	7 8	3A 2A			Line Voltage
	3	AC2
	2	AC1
	1
6	5			ON/	Line Voltage
MELT CYCLE DISABLE
Thermatron Temperature				OFF
				Switch	The Pilot System
Controller
					120V

Electronic Ignition Configuration

In units configured for electronic ignition, an ignition module connected to an ignitor assembly replaces the pilot system. The ignition module performs three important functions: it provides an ignition spark, supplies voltage to the gas valve, and proofs the burner flame.

The module contains a time delay circuit and a coil that activates the gas valve. The ignitor assembly consists of a spark plug and a flame sensor element.

At start-up the ON/OFF switch is placed in the "ON" position, supplying 115 VAC or 230 VAC, according to system configuration, to the Thermatron interface board. The voltage is stepped down

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