Dean D50 Installation, Operation & Maintenance Manual page 24

6.5.3 Rate of Oil Return Slowing?
Rate of oil
return to the fryer
is slowing.
Is this the
first fryer to be filtered
during this filtering
session?
Yes
Check the filter
paper in the filter
pan.
Is the filter
paper properly secured
by the hold down
ring?
Yes
Paper may be
plugged by improper
use of filter powder.
Change the filter paper.
Throw away the old top
sheet and use the old
bottom sheet as the new top
sheet.
Take a new sheet and
place it in the bottom
of the pan. Place the
new top sheet over it.
Secure the filter
papers by latching
the hold down ring.
Check the filter sump.
No Sediment collects
around the suction pipe
in the filter bottom.
Paper may not be
secured by the hold down
No
ring. Air is being allowed
to get into the system.
Sprinkle 16oz of filter
powder evenly across the
surface of the filter paper.
Remove the filter
pan cover.
Unlatch hold-down ring and
remove the filter paper and
filter paper support grid.
Clean support grid
and set aside
temporarily.
Wipe sediments
out of the bottom
of the filter pan.
Inspect drain ports at the
bottom rear of the filter pan
and remove any sediment
or visible blockages.
Reassemble the filter
pan assembly. Turn
the pump motor "ON".
Has
the oil return rate
improved?
Yes
Conduct normal
filter operations.
23
Blockage may be
between the filter pan
No
bottom and the flex
hose valve.
Go to flowchart titled
"Blockage between
Filter Pan and Flex Hose
Valve" on page 24.