Filtration Malfunctions; Built-In Filtration System Service Procedures; Filtration System Problem Resolution - Frymaster BIELA14-T Series Service Manual

1.10

Filtration Malfunctions

1.10.1

Built-in Filtration System Service Procedures

Most filtration problems arise from operator error. One of the most common errors is placing the filter paper/pad on the
bottom of the filter pan rather than over the filter screen.
Whenever the complaint is "the pump is running, but no oil is being filtered," check the installation of the filter paper/pad,
including that the correct size is being used. While you are checking the filter paper/pad, verify that the O-rings on the filter
pan suction tube are present and in good condition. Missing or worn O-rings will allow the pump to suck air and decrease
its efficiency. Also check the pre-filter. A plugged pre-filter (see Figure 9) can slow the flow of oil. Use the attached wrench
to open (see Figure 10) and clean the pre-filter (see Figure 11).
If the pump motor overheats, its thermal overload will trip
and the motor will not start until it is reset. If the pump
motor does not start, press the red reset switch located on
the front of the motor.
caused the motor to overheat. It may be attributed to
several frypots in a large battery of fryers being filtered
one after the other and the pump overheated. Letting the
pump cool down for at least a half-hour is all that is
required in this case. Often, the pump overheated for one
of the following reasons:
Shortening that remained in the pan after

previous filtering solidified in the suction tube
recess in the bottom of the pan or the suction
tube, itself. Adding hot oil to the pan and waiting a few minutes will usually correct this problem. A flexible wire
can be used to clean out the suction tube and the recess in the bottom of the pan. NEVER use compressed air to
blow solidified shortening out of the suction tube!
The operator attempted to filter oil that was not heated. Cold oil is thicker and causes the pump motor to work

harder and overheat.
Ensure that filter screen is in place prior to filter pad/paper placement and filter pump
operation. Improper screen placement is the primary cause of filtration system malfunction.

1.10.2 Filtration System Problem Resolution

If the motor hums but the pump does not rotate, there is a blockage
in the pump. Incorrectly sized or installed paper/pad will allow food
particles and sediment to pass through the filter pan and into the
pump. When sediment enters the pump, the gears can bind up and
cause the motor to overload, tripping the thermal overload.
Solidified shortening in the pump will also cause it to seize, with
similar results.
A pump seized by debris or hard shortening can usually be freed by
manually moving the gears with a screwdriver or other instrument as
illustrated in Figure 12. Ensure power to the pump motor is off
before trying this.
1. Disconnect power to the filter system.
2. Remove the input plumbing from the pump.
3. Use a screwdriver to manually turn the gears (see Figure 12).

Turning the pump gears backwards will release a hard particle and allow its removal.

Turning the pump gears forward will push softer objects and solid shortening through the pump and allow free
movement of the gears
If the pump starts, something
.
Figure 9 Figure 10
CAUTION
FLOW
1-19
Figure 11
Sediment Particle
Up for reverse
Down for forward
Figure 12