Whirlpool 4322452 manual Thermostat Switch Contacts Oven Ignitor Safety Valve

When current flows through the ignitor, heat is applied to the bimetal strip. The amount of heat necessary to warp the bimetal enough to open the valve requires 3.0 amps of current flow in the circuit (see Figure 4-18). The reason the valve is designed not to open below 3.0 amps, is to insure that the temperature of the oven ignitor is above 1800˚F before the valve opens. The operation of the system is complete when gas is flowing from the safety valve to the oven burner, and is ignited with the hot glo-bar ignitor. The entire process may take between 40 to 60 seconds to start.

Gas Outlet

(To Oven Burner)

Safety Valve

120Volt

Supply Terminal

Gas Inlet

(From Regulator)

Current Warps Bimetal	Figure 4-18
& Valve Opens

Throughout the cooking cycle, the oven will continue to “heat up” and “cool down” to maintain the selected temperature (see Figure 4-19). This operation is controlled by the thermostat’s sensing bulb.

L1

Thermostat Switch

Contacts Closed

Oven Is Heating

N

To Oven Burner

Oven Glo-Bar

Ignitor

3.0 Amps	Safety Valve Safety Valve Opens
	& Gas Flows
	To Oven Burner

L1	Thermostat		N
	Switch Contacts	Oven Ignitor	Safety Valve

Figure 4-19

Page 4-10