Blower Motor; Oven Lights; Oven Heating Elements; Door Switch - Vulcan-Hart ET8 Service & Parts Manual

Electric convection ovens
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BLOWER MOTOR
The blower motor has internal thermal protection, and its
sealed bearings do not require any lubrication. The
rrK)unting of the blower assembly allows servicing from
inside the oven as follows:
1. Remove fan cover.
2. Loosen set screw on the airotor with an Allen
wrendi.
3. Pull airotor forward off the motor shaft with a wheel
puller.
4. Remove the four nuts holding the motor mounting
plate.
5. Pull ttie motor assembly forward and reset it on
cavity bottom.
6. Remove the junction box cover and the supply
leads.
7. Reset the motor on its back. Remove the four flat
head screws, lockwashers, nuts and spacers used
to fasten the motor mounting plate to the motor.
The motor is suitable for connection of two different
voltage supplies. Check the connection instruction
inside the motor junction box cover to assure proper
connection for the available voltage supply.
The direction of rotation is clockwise as viewed from in
front of the oven. The 1 -phase motois are internally
designed for clockwise rotation. On 3-phase motors,
interchange any two supply leads to convert
counterdockwlse to clockwise rotation.
8. Remove the two screws holding the side liner. Pull
the liner backward and out
9. Remove the element clamp covers holding the
element to the oven side.
10. Remove the three screws holding the element
bracket to the top.
11. Remove the element and the wires down from the
top of the oven.
12. Remove the connecting supply lead.
OVEN LIGHTS
The two 50 watt. 120 volt bulbs £U'e connected in series
in these electric ovens.
To replace lamps, remove the four mounting bolts
holding the lamp window assembly from the rear of the
unit. Both the lamp, as well as the socket can now be
serviced. Make sure the replacement lamp is of high
temperature type and is not larger than 50 watts.
OVEN HEATING ELEMENTS
The three heating elements mounted on each side of the
oven behind the perforated side liner can be sen/iced
from inside the oven as follows:
1. Remove the two screws holding the liner. Pull tfie
liner backward and out.
2. Remove the element damp covers holding element
to the oven side.
3. Remove the three screws holding the element
bracket to the top.
4. Remove the element and the wres down from the
top of the oven.
DOOR SWITCH
With the oven door dosed, the normally open contact
of the door switch is dosed providing power to the
element and motor controls. When the door opens, tiie
normally open contact is de-energized, and the element
contactor and the blower are turned off.
To adjust or replace the door switch, remove the two
mounting screws on the underside of the top finishing
piece. Depress the door catches up inside the top
channel and pull the top finishing piece off.
The door switch is controlled by a cam-type device
mounted to the top of the right hinge pin. The cam
must actuate the door switch when the door is
approximately 3" away from being dosed.
To replace the door switch, remove the mounting
screws on the door switch support bracket and remove
the switch from the bracket.
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