Whirlpool 4322452 manual Safety Valve

As this is taking place, the thermostat also opens the main gas line, and provides gas to the safety valve (see Figure 4-6). As soon as the safety valve is hydraulically opened by the signal from the sensing bulb, gas is released from the safety valve to the oven burner, and ignited by the heater pilot flame. NOTE: If the heater pilot flame is not available to heat the safety valve sensing bulb, the safety valve will not open, and gas can not enter the oven.

	Gas Flows Out
Pressure Forces	Orifice Hood
Contact Against
Switch & Opens Valve	Valve Opens & Gas
	Flows To Oven Burner
Heater Flame	Gas Inlet
Heats Sensor
Gas Safety Valve Open	(From Thermostat)
Safety Valve	Figure 4-6

When the oven reaches the selected temperature, the sensing bulb for the thermostat closes the thermostat gas lines and reduces the heater pilot flame back to a smaller “standing pilot” flame. With no heater pilot flame, the sensing bulb for the safety valve cools, closes the safety valve, (see Figure 4-7), stops the gas supply to the oven burner, and eliminates the flame. This cycling will continue for the duration of the cooking cycle.

Orifice Hood

Heater Sensing

Bulb & Capillary Tube

Cold Sensor

Valve Closed

No Gas Flow

Gas Inlet

(From Thermostat)

Gas Safety Valve Closed

Safety Valve Figure 4-7

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