Whirlpool 4322452 manual Thermostat Switch Contacts Oven Ignitor Safety Valve

Page 54

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

Image 54
Contents GAS Ranges Voltage Checks Table Of Contents Page Introduction Page Fundamental Properties of GAS Measuring Heat Energy#3 Manufactured GAS Fuel Types#2 Mixed GAS #4 Liquefied Petroleum L.P. GASCategory Characteristics of GAS Fuels FuelDistribution of Natural GAS 25 To 60 Pounds Pressure MainDistribution of L.P. GAS Pressure Regulators FunctionsRegulator Operation Open Position Regulator Diagnostics VentingMeasuring GAS Pressure WHIRLPOOL, U.S.A., Benton HARBOR, MIMagnehelic Gauge Cooktop Burner System GAS DistributionGAS Valve OFF PositionGAS Valve Orifices PLUG-TYPE OrificesOrifice Specifications Chart Natural GAS OrificesUniversal ORIFICE-OVEN Application Natural Gas PositionGAS Valve Orifice Diagnostics Performance Check Burner Operation AIR Shutter & Venturi Burner Head Flame Characteristics Properly Burning FlameNot Enough Primary Air Flame Quenching Page Improper Flame Diagnostics Symptom Cause Corrective ActionCleaning the Burners Port Burner Climber PortStanding Pilot Ignition System OperationRelighting a Standing Pilot Adjusting the Pilot Flame Height Cleaning the Pilot Electronic Ignition System 123Ground Strap Ignitor Spark Sealed Burner FlowElectronic Ignition Diagnostics Performance Check Oven Burner System Standing Pilot IgnitionGas Standing Pilot Safety Valve Lighting the Oven Pilot GLO-BAR Ignition Thermostat Switch Contacts Oven Ignitor Safety Valve 50 to 1100 Ω Amps Safety Valve Thermostat Switch Contacts Oven Ignitor Safety Valve Cleaning the Oven Burner SELF-CLEANING System 88PBK P3-1 P3-4 Oven Off Bake Cycle Broil Cycle Bake BroilCode Guidelines F0 =Performance Check SELF-CLEAN Oven Door Locking System Door Locked Door Unlocked Natural and L.P. GAS Conversion GeneralConverting a Pressure Regulator Converting Cooktop BurnersConverting AN Oven Burner Converting AN Oven ThermostatBurner Flame Adjustment Performance Check Page Testing the Components General Information Testing AN Oven GLO-BAR Igniter Carborundum IgnitorTesting AN Ignitor Switch Offoff LiteliteTesting AN Oven Light Switch Testing AN Oven Temperature Sensor Testing AN Oven Door Latch To test the solenoid windings, perform the following stepsTo test the switches Testing a GAS Safety Valve Testing the GAS Control Valves Testing the GAS Pressure Regulator Manual Shutoff ValveTroubleshooting Chart Problem Possible Cause SolutionProblem Possible Cause Solution Schematic Diagrams Standard RangeSelf-Clean Range Strip Circuits BakeOven Light