OVEN SYSTEMS
5.1
Heater Assembly
e Speedcook oven heater assembly consists of
three elements. e elements are voltage specifi c and
cannot operate properly without the correct
voltage applied. Confi rm incoming voltage matches
the oven’s specifi cations. During preheat, all three
elements are energized.
e K1 solid state relay (see page 5.12) controls L1
voltage to the two primary elements while the K8
relay (see page 5.10) controls L1 voltage to the
preheat element. e K9 relay (see page 5.11)
controls L2 voltage to all three elements.
NOTE: For 208 volt units, preheat amperage is
at 30.8 amps and once the temperature has been
reached, the operating amperage is at 20.5 amps.
NOTE: For 240 volt units, preheat amperage is
at 28.8 amps and once the temperature has been
reached, the operating amperage is at 19.2 amps.
Jetplate (Bottom)
e bottom jetplate channels air that is generated
from the bottom blower motor.
Jetplate (Top)
e top jetplate channels air that is generated from
the top blower motor. is air passes through a
stirrer before entering the cook cavity through the
jetplate holes.
CAUTION: e top jetplate is ceramic and
may crack or break if mishandled. Be careful when
removing or reinstalling it.
Stirrer Motor and Assembly
e stirrer is responsible for evenly distributing hot
air and microwaves that are launched from the top
of the oven into the cook cavity. e stirrer is driven
by a motor that remains on during a cook cycle.
When the oven is cooling down, the stirrer motor
turns off when the cook cavity temperature recedes
below 160°F (71°C).
To visually test stirrer motor operation, go to Bake,
which will automatically turn on the stirrer, the stir-
rer is visible through the upper jetplate holes.
Convection System -
Speedcook Oven
e Speedcook oven convection system is designed
to rapidly heat, clean, and recirculate air into the
cook cavity. is section contains information about
the following components:
- Blower motor (bottom)
- Blower motor (top)
- Blower motor controller (BMSC)
- Heater assembly
- Jetplate (bottom)
- Jetplate (top)
- Stirrer motor and assembly
For information on accessing and removing parts,
and for part numbers, see the Appendix.
Blower Motor (Bottom)
e bottom blower motor runs on varied 3-phase
power to force the air into the upper oven cavity.
e motor is controlled by a proprietary controller.
e bottom blower motor can be tested in
(see page 4.4).
Blower Motor (Top)
e top blower motor runs on varied 3-phase power
to force the air into the upper oven cavity. e
motor is controlled by a proprietary controller.
e top blower motor can be tested in
(see page 4.4).
Blower Motor Controller (BMSC)
e blower motor controller is proprietary and will
only operate the convection motors described above.
e motor controller is controlled on command
from the control board and a 0-10VDC speed
command from the control board.
e blower motor controller can be tested in
by testing the blower motors
(see page 4.4). For additional troubleshooting, see
page 6.3.
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