Repair manual

OPERATION
3-6
TWO SPEED WITH INTEGRATED CONTROL - 21535 REV D
Component Reference
NOTE: Refer to FIGURE 13 page 3-13 for compoĆ
nent locations.
1. MODE SELECTOR SWITCH
2. DOOR SWITCH
3. TRANSFORMER
4. SINGLE POLE DOUBLE THROW RELAY
5. AXIAL FAN
6. CONVECTION BLOWER
7. INTELLITOUCH CONTROL
8. MERCURY CONTACTOR
9. HEATING ELEMENTS
Operation
1. Power is delivered to Terminal N of the mode
selector switch (1). If the switch is made beĆ
tween N and 3, one leg of power is delivered
to one side of the door switch (2), the primary
side of a transformer (3), the common terminal
of a single pole double throw relay (4), and the
axial fan (5).
2. If the door is closed, the door switch will also
be closed sending power to the convection
blower (6).
3. The secondary side of the transformer sends
24 volts to terminal T2 of the Intellitouch control
(7).
4. If one or all of the program buttons are proĆ
grammed with a time and temperature and acĆ
tivated, a circuit is completed between T2 and
T5 of the control sending 24 volts to the coil of
a mercury contactor (8), powering up the heatĆ
ing elements (9).
NOTE: The temperature probe used has an asĆ
cending temperature coefficient.
NOTE: The timer is built into the control and comĆ
pensates with change in temperature.
NOTE: The motor is two speed, when the mode
selector switch is closed between termiĆ
nals N and 3 the motor is set for low speed.