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Improperly sized or installed paper will also allow food particles and sediment to pass through and
clog the suction tube on the bottom of the filter carriage. Particles large enough to block the suction
tube may indicate that the crumb tray is not being used.
Pan blockage can also occur if shortening is left in the pan and allowed to solidify. The heater strip
on the suction tube is designed to prevent solidification of residual shortening left in the tube. It will
not melt or prevent solidification of shortening in the pan.
Blockage removal can be accomplished by forcing the item out with an auger or drain snake.
NEVER use compressed air or other pressurized gases to force out the blockage.
The electronics of the FootPrint III system are simple and straightforward. Microswitches, attached
to handles for each vat and wired in parallel, provide the 24VAC required to activate the pump relay
coil when the handles are moved to the ON position. The activated pump relay coil pulls in the
pump motor switch, supplying power to the pump motor.
Pump Relay
Coil
Micro-
switches
Pump Motor Switch
Pump Motor
Solenoids
(Redesigned
Models Only)
24VAC
Line VAC
FootPrint III Simplified Wiring Diagram
All Heater Tapes (Original and Redesigned Models)
(Heater Tapes have been removed from
oil return lines in Redesigned Models)
M
For FootPrint III systems built before August 1997, all heater tapes are wired directly into the line
VAC source. They remain energized as long as the unit is plugged in. In systems built in August
1997 and later, oil return line heater tapes have been eliminated. In these units, the only heater tape
used is on the suction tube and pump. This tape is still wired directly into the line voltage. A pair of
vacuum-breaking solenoids is wired into the 24VAC circuit.
The redesigned FP III is distinguished from original-design units by the absence of casters on the
filter base assembly. The redesign incorporated an improved oil return system that allows