Whip Mix P.D.Q., Operator'S Manual

Page: 14 / 24

14
Turn off the power to the oven, unplug the power cord,
remove trays from the muffle chamber and insure that
the oven is cool .
Remove the upper back cover .
On the rear of the unit remove the nuts that hold the
heater plate wires to the ceramic terminals . Remove all
hardware and wires from the terminals . Discard any
burnt hardware and replace with hardware pieces
shipped with the heater plates . Retain hardware for
later use . Straighten the wires for smoother removal
of the plates .
Straighten thermocouple at the bend and remove
bushings from heater plate wires .
Move heater wires and thermocouple out of the
upper housing to allow insulation to slide out
the back of the unit .
From the front of the muffle chamber with the door open
push the entire insulation chamber out the back of unit
and place on a table .
Remove ceramic front plates from muffle insulation
and place aside .
From here the plates can be removed by pulling them
out the front of the insulation . The Large models have
back plates and side plates, while the Medium model
has only side plates .
Place the new plates in the chamber, if back plates are
being replaced as well they must be installed first, also
insure that the wires are bent up so they will slide into
the back .
If the back plates are being replaced the filler strip
should be replaced as well . A new strip was shipped
with the plates .
Once the plates are installed place the insulation chamber
back inside the oven and wire the terminals according to
the model and voltage in the pictures on the next page:
When wiring the plates insure that between each wire
a flat washer is placed . See picture below .
Note: Place flat washer between each wire.
After the heater plates are wired, replace the upper back
cover and bottom cover . Insure that the oven heats by
running a program .
FIELD SERVICE
REPLACEMENT OF HEATING PLATES
Heater Jumper
Ceramic Fronts
Flat Washer
Flat Washer
Side Heating
Plate Assembly
(2)
Ceramic Insulating Bushings
Insulating Strip
Rear Heating
Plate Leads
Rear Heating
Plate Leads
Lock Washer
Lock Washer
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