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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION
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| trial cycle repeats after a 15 |
| E. | Power switch (S1) OFF. | |||
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| second purge between |
| F. | Function switch (S3) set to Normal ROAST | |||
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| cycles for two additional |
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| cycle. | ||||
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| tries before locking out. To |
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| G. | Oven light switch (S2) ON/OFF (position | ||||
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| reset after a lockout, turn |
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| power switch (S1) OFF then |
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| has no affect on the function of the Normal | |||
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| ON. |
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| ROAST cycle). | |||
5. Oven reaches the fixed HOLD temperature and |
| H. | Temperature control dial set to lowest | |||||
| the hold thermostat opens. |
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| temperature (fully counterclockwise). | ||||
| A. Heat light goes out. |
| I. High limit switch CLOSED. | |||||
| B. Power removed from heat relay (R3) and |
| J. Roast timer (normal cooking) in the OFF | |||||
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| the contacts open (N.O.). |
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| position. | |||
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| 1) Ignition control module |
| K. Roast and Hold timer in the OFF position. | ||||
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| a. Power removed from 2nd valve |
| L. | Oven doors Closed. | |||
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| (main) on the gas valve and gas |
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| 1) Door switch contacts CLOSED. | |||
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| flow to the burner stops. |
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| M. | Oven cavity temperature below 140°F. | ||||
| C. Power is also removed from motor speed |
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| 2. | Set temperature control dial to desired ROAST | ||||||
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| relay (R1). | ||||||
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| 1) Convection fan motor |
| then HOLD temperature (Roast & Hold | ||||
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| cooking). | |||||
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| and fan stops rotating. |
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| 3. | Power switch (S1) turned ON. | |||||
6. | The oven will continue to cycle on the hold | |||||||
| A. | Component cooling fan energized. | ||||||
| thermostat until the ROAST & HOLD timer is |
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| turned to the OFF position, the function switch |
| B. | Power ON light (Amber) comes ON. | ||||
| (S3) is changed back to ROAST (normal |
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| C. | Power to one side of the following | |||||
| cooking) or the power switch (S1) is turned to |
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| the OFF or OVEN COOL position. |
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| components: Normal ROAST timer | ||||
WKGD, WKGDX With Roast & Hold Option (Solid |
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| terminal 1, ROAST & HOLD timer terminal | |||||
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| 1, transformer primary (T1). | ||||||
State Temperature Control) |
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| NOTE: Power is available to the oven light | |||||||
Schematic diagram 10834 will be used to explain the |
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| switch (wire #20) to turn the oven cavity lights | |||||||
electrical sequence of operation for both the Normal |
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| ON when the light switch is turned ON; and | |||||||
ROAST cycle (normal cooking) and the ROAST & |
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| power is available to the normally open N.O. | |||||||
HOLD cycle. |
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| side (wire #28) of the door switch contacts and | |||||||
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Normal Roast Cycle |
| connects power to additional components when | ||||||
1. | Conditions. |
| the door switch contacts are CLOSED (door | |||||
| closed). | |||||||
| A. | Oven connected to correct voltage. |
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| 1) Transformer (T1) energized. | |||||
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| 1) L1 (HOT) to power switch (S1). |
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| a. Power (24VAC) to one side of | ||||
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| 2) L2 (NEUTRAL or SECOND LINE) to |
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| the following components: heat | |||
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| one side of the following components: |
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| relay (R3) normally open (N.O.) | |||
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| power ON light, heat light, |
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| contacts, high limit | |||
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| temperature control board terminal 9 |
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| through the normally closed | |||
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| (120VAC) or terminal 10 (208- |
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| (N.C.) contacts to the 1st valve | |||
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| 240VAC), oven cavity lights, buzzer, |
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| (safety) on the dual solenoid gas | |||
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| ROAST timer motor (normal cooking), |
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| valve. | |||
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| ROAST & HOLD timer motor, heat |
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| a) 1st valve (safety) on the gas | |||
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| relay coil (R3), convection fan motor |
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| valve energized. | |||
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| common (C), transformer primary |
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| NOTE: Gas does not flow to the | ||||
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| (T1), motor speed (Hi/Low) relay coil |
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| (R1), hold relay coil (R2) and the |
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| burner until the 2nd valve (main) | |||
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| component cooling fan. |
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| is energized. | |||
| B. | Oven properly grounded. |
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| 2) With door switch closed, power is | |||
| C. | Gas supply valve ON. |
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| applied to motor speed (Hi/Low) relay | |||
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| (R1) normally open (N.O.) contacts | |||||
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| D. Gas combination control valve ON. |
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| and hold relay (R2) common (C). | ||||
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| Page 39 of 64 |
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| F32700 (February 2006) | ||
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