Wolf WKGCX 126625, WKGDX 126624, WKGX 126623 Full Size GAS Convection Ovens Electrical Operation

Page 45

FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION

I.Oven doors Closed.

1)Door switch contacts CLOSED.

J.Oven cavity temperature below 140°F.

2.Power switch (S1) turned ON.

A.Power (120VAC) to computer control pin 3 (C3-3).

NOTE: Power at pin 3 is not transferred to other components until computer control is energized and operating conditions are met.

B.Power is available to the oven light switch (S2).

C.Power to terminal 1 on solid state relay 1 (SSR1 -load side) and solid state relay 2

(SSR2 -load side).

D.Component cooling fan energized.

E.Transformer (T1) is energized.

1)Power (24VAC) to one side of the following components: heat relay (R1) normally open (N.O.) contacts, high limit --- connected through the normally closed (N.C.) contacts to the 1st valve (safety) on the dual solenoid gas valve.

a.1st valve (safety) on the gas valve energized.

NOTE: Gas does not flow to the burner until the 2nd valve (main) is energized.

2)Power (24VAC) to the oven computer control.

a.Control is energized and performs a power ON self test before energizing outputs.

NOTE: If the control passes self test, then the outputs are energized and operation sequence continues. If control does not pass self test then the corresponding error code is displayed.

b.Computer control senses oven cavity temperature.

a)With the oven cavity temperature below set point, the controls 120VAC output from pin C3-2 is activated and power is connected to the common (C) side of the centrifugal switch contacts on the convection fan motor.

NOTE: The set point temperature of the computer control will be the last temperature that was set.

NOTE: Power is not applied to the heat relay coil (R1) until the centrifugal switch contacts on the convection fan motor close.

c.The controls 5VDC output from pins C2-2 (-) and C2-8 (+) is activated and SSR1 relay is energized.

a)Convection fan motor is energized (fan speed hi).

b)When the convection fan motor reaches operating speed, the centrifugal switch (N.O.) on the motor closes.

3)With the 120VAC output from the control activated and the centrifugal switch on the convection fan motor closed, power is applied to the heat relay coil (R1).

a.Heat relay coil (R1) is energized, (R1) contacts (N.O.) close and the heating circuit is powered.

b.Oven HEAT LIGHT on the control comes ON.

c.Ignition control module is energized.

a)No ignition light (red) comes ON, module performs a self diagnostic test for 4 seconds, 2nd valve (main) on the gas valve is energized. Gas starts to flow to the burner, sparking begins, the NO IGNITION light goes out and burner lights. Sparking continues for up to 7 seconds or until a flame is established. If a flame is SENSED, the NO IGNITION light stays out and burner remains lit.

If a flame is not SENSED after 7 seconds of sparking, the NO IGNITION light comes back on, 2nd valve (main) on the gas valve is de-energized and gas flow to the burner stops. Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out. To reset after a lockout, turn power switch (S1) OFF then ON.

Page 45 of 64

 

F32700 (February 2006)

 

Page 44 Page 46
Image 45
Page 44 Page 46
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 Catch Ball Assembly Independent Doors DisassemblyDoor Window Door Switch High Limit Thermostat Interior LightsLamp 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 ModeComputer Control Calibration WKGC/WKGCX Probe TestSolid State Relay Test Function Switch S3 Door SwitchComponent Function 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 Sequence of Operation WKG, Wkgx With Roast & Hold Option Mechanical KX ThermostatNormal Roast Cycle 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
Top Page Image Contents