Repair manual

CTB and CTBR
3-5
INFINITE WITH PULSE PLUS - 21062 REV A
Component Reference
NOTE: Refer to FIGURE 12 page 3-12 for compoĆ
nent locations.
1. MODE SELECTOR SWITCH
2. FAN DELAY TIMER
3. COOK THERMOSTAT
4. AXIAL FAN
5. BLOWER MOTOR
6. COOK LIGHT
7. THREE POLE DOUBLE THROW RELAY
8. MERCURY CONTACTOR
9. OVEN LIGHT
10. TIMER
Operation
1. Power is delivered to the N terminal of the
mode selector switch (1). When the Mode seĆ
lector switch is set to the cook high mode,
power is delivered to terminal 1 of the fan delay
timer (2), terminal 7 of the solid state cook therĆ
mostat (3) and the axial fan (4).
2. If the fan delay timer is made between termiĆ
nals 1 and 4, power will be delivered to the
door switch and to terminal 1 of the cook timer.
If the door is closed then the door switch must
be closed sending power through the mode
selector switch to the blower motor (5). If the
fan delay timer has timed out a circuit is made
between terminals 1 and 2 illuminating a cook
light (6) and sending power to terminal 7 of a
three pole double throw relay (7).
3. If the temperature control is calling for heat, a
circuit is made between terminals 6 and 7 powĆ
ering up a mercury contactor (8) and an oven
light (9).
4. After approximately 30 seconds, the contacts in
the solid state pulsing timer (10) open, stopping
power from being delivered to the blower motor.
The motor stops for approximately 30 seconds
after which the contacts close again sending
power to the blower motor for another 30 second
interval. This process continues for as long as
there is time set on the fan delay timer.
NOTE: The temperature probe has a descending
temperature coefficient.
NOTE: The fan delay light stays illuminated for as
long as there is time left on the fan delay
timer.
NOTE: The solid state pulsing timer pulses the fan
on and off every 30 seconds for the amount
of time set on the fan delay timer.