Wolf WKG 126620, WKGDX 126624 Blower Motor, Motor Speed Relay R1, Solid State Temperature Control

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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION

Blower Motor

Operates the oven cavity blower (convection fan). Also, an internal

 

centrifugal switch on the motor is utilized to allow the connection of power

 

to the heat relay (R3) when the motor is at operating speed.

Motor Speed Relay (R1)

Supplies power to the blower motor through (R1) relay contacts. Available

 

on models with Roast & Hold option only.

Hold Relay (R2) . . . . . . . . . . . . . . . . Hold relay (R2) supplies power to the Hold thermostat for maintaining the fixed hold temperature in the oven cavity, after the ROAST & HOLD time expires.

Transformer (T1) . . . . . . . . . . . . . . . Provides 24VAC power to the ignition control module and heating circuit.

Solid State Temperature Control

(WKGD/WKGDX) . . . . . . . . . . . . . . . Monitors temperature sensor and regulates the oven cavity temperature by controlling the heat relay (R3) through the blower motor centrifugal switch contacts.

High Limit Thermostat . . . . . . . . . . Protects the oven from temperatures above 550°F by removing power from the 1st valve (safety) on the dual solenoid gas valve which stops the flow of gas to the burner. Auto resets at 500°F.

Computer Control

(WKGC/WKGCX) . . . . . . . . . . . . . . . Monitors temperature sensor and regulates the oven cavity temperature by controlling the heat relay (R1) through the blower motor centrifugal switch contacts. Also, counts the ROAST time (normal cooking) of the product and signals the electronic alarm at the end of the cycle. If ROAST & HOLD mode is selected, when the ROAST (then hold) time expires, the oven heating stops and the oven enters HOLD mode. Once the oven cavity temperature drops to 150°F, the heat comes back on and the oven cycles at this temperature to hold the cooked product. Roast & Hold is standard on computer models.

SSR1 & SSR2 (WKGC/WKGCX) . . When SSR1 is energized by computer control, connects power to blower motor for Hi fan speed operation in normal ROAST mode. In ROAST & HOLD Mode only, SSR1 is de-energized and SSR2 is energized by computer control and connects power to blower motor for Low fan speed operation.

Ignition Control Module . . . . . . . . . Controls the gas ignition cycle - Energizes the 2nd valve (main) on the dual solenoid gas valve, generates spark for burner ignition, monitors the presence of a flame and controls the No Ignition light. The ignition times are: 4 second self diagnostic test (initial power ON); 7 second ignition trial; 3 ignition trials with a 15 second purge between each trial.

Igniter/Flame Sense . . . . . . . . . . . . Ignites the gas and senses the presence of a flame. The flame presence generates a micro-amp FLAME SENSE current that is monitored by the ignition control module. A flame sense current of 0.7 micro amp (minimum) is required to maintain burner ignition.

Power On Light . . . . . . . . . . . . . . . . Lit whenever the power switch (S1) is turned to ON or Oven Cool mode. Heat Light . . . . . . . . . . . . . . . . . . . . Lit whenever temperature control is calling for heat.

No Ignition Light . . . . . . . . . . . . . . . Lit when power is turned ON, during ignition trial & gas purge time and when no flame is detected by flame sensor. If the oven fails to ignite after 3 attempts, it will remain lit until power is reset.

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F32700 (February 2006)

 

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Contents WKG Series Full Size GAS Convection Ovens Table of Contents Computer Control Models Only Specifications Installation Operation Cleaning LubricationIntroduction ToolsTop Front Cover Covers and PanelsBottom Front Cover Control PanelControl Panel Components Removable Components ProcedureComponent Panel Components GAS Burner Temperature Probe WKGD/WKGDXGAS Solenoid Valve GAS OrificeSpark Igniter Flame Sense Ignition Control ModuleBlower and Motor Oven Doors and Bearings Independent Doors Oven Doors Simultaneous Doors Assembly RemovalDoor Window Door Catch Ball Assembly Independent DoorsDisassembly Door Switch Lamp High Limit ThermostatInterior Lights Cooling FAN Lamp AssemblySolid State Temperature Control Calibration WKGD/WKGDX Service Procedures and AdjustmentsMechanical Thermostat Calibration WKG/WKGX Solid State TemperatureTemperature Probe Test WKGD/WKGDX Temperature Probe Test WKGD/WKGDXTemp F Ohms GAS Pressure AdjustmentVerification of Spark AT Ignitor Door Switch AdjustmentBlower Adjustment Door Catch Ball Adjustment Independent Doors Door AdjustmentIntroduction ProcedureComputer Control WKGC/WKGCX Operation Setup ModeSolid State Relay Test Computer Control Calibration WKGC/WKGCXProbe Test Component Function Function Switch S3Door Switch Blower Motor Solid State Temperature ControlMotor Speed Relay R1 Computer ControlMechanical Temperature Control Temperature ProbeComponent Location Gas Valve Dual SolenoidWKG/WKGX Plug, Socket and Components Standard Controls WKGD/WKGDX Plug, Socket and Components Standard Controls Full Size GAS Convection Ovens Electrical Operation WKGC/WKGCX Plug, Socket and Components Roast & Hold Standard Normal Roast Cycle Sequence of OperationWKG, Wkgx With Roast & Hold Option Mechanical KX Thermostat Roast and Hold Cycle Timer Cycle Normal Roast CookingFull Size GAS Convection Ovens Electrical Operation Timer Cycle Roast & Hold Cooking WKGD, Wkgdx With Roast & Hold Option Solid State Temperature ControlTimer Cycle Normal Roast Cooking Roast and Hold Cycle Timer Cycle Roast & Hold Cooking Oven Cool Cycle Solid State Temperature Control Roast Cycle Normal Cooking Roast & Hold Standard on Computer ModelFull Size GAS Convection Ovens Electrical Operation Oven Cool Cycle Computer Control Model Temperature and Time Cycle CookingWKG, Wkgx Mechanical KX Controls SchematicsWKG, Wkgx Mechanical KX Controls, Roast & Hold Option WKGD, Wkgdx Solid State Temperature Control Full Size GAS Convection Ovens Electrical Operation WKGC, Wkgcx Computer Control Roast & Hold Standard Wiring Diagrams Full Size GAS Convection Ovens Electrical Operation WKG, Wkgx Mechanical KX Controls, Roast & Hold Option Full Size GAS Convection Ovens Electrical Operation WKGD, Wkgdx Solid State Temperature Control Full Size GAS Convection Ovens Electrical Operation Full Size GAS Convection Ovens Electrical Operation Full Size GAS Convection Ovens Electrical Operation WKGC, Wkgcx Computer Control Roast & Hold Standard Full Size GAS Convection Ovens Electrical Operation ALL Models TroubleshootingComputer Control Models only Error CodesDescription Condensed Spare Parts List
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