FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION
a.Motor speed relay (R1) is energized through hold relay
(R2) normally closed contacts (N.C.). Relay contacts (R1) change state and the normally open (N.O.) set of contacts close.
a)Power is connected through the function switch (S3) contacts and 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.
c)Power to normally open (N.O.) side of internal relay contacts (terminal 7) on the temperature control board.
3)Power is also connected back through
asecond set of contacts on the power switch (S1) to terminal 8 on the temperature control board.
a.Solid state temperature control energized. If the oven temperature is below set point, the temperature control will energize its internal relay. The normally open (N.O.) contacts close and apply power to the following components:
a)Heat light (clear) comes ON.
b)Power is connected through the centrifugal switch contacts on the convection fan motor, heat relay (R3) is energized, (R3) contacts (N.O.) close and the heating circuit is powered.
c)Ignition control module is energized.
d)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
4.Oven reaches set temperature.
A.Temperature control
1)Heat light goes out.
2)Power removed from heat relay (R3).
a. R3 normally open (N.O.) contacts OPEN.
a)Power removed from 2nd valve (main) on the gas valve and gas flow to the burner stops.
5.The oven will continue to cycle on the temperature control until the doors are opened or power switch (S1) is turned to the OFF or OVEN COOL position.
Timer Cycle (Normal Roast Cooking)
NOTE: The ROAST timer (normal cooking) operates independently of the heating cycle. Additional time can be set or the timer can be turned OFF throughout the cooking cycle.
1.With the power switch turned ON, power is supplied to timer.
A.Set ROAST timer to desired time (normal cooking).
B.Contacts 1 & 3 close, timer motor is energized and timing DOWN begins.
2.Time expires on ROAST timer (normal cooking).
A.Contacts 1 & 3 open, timer motor is de- energized and timing stops.
B.Contacts 1 & 4 close.
1)Buzzer energized and sounds.
NOTE: The buzzer continues to sound until the timer dial is set to the OFF position or additional time is set.
F32700 (February 2006) |
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