Dean MF90 Series Installation & Operation Manual page 21

MF90 SERIES PORTABLE FILTRATION SYSTEMS
4.5 Unit Operation (cont.)
8. When filtering is complete, close the drain
valve handle. It takes approximately 5 to 7
minutes for the filter to pump all the oil back
into the fryer. For "AU" units, pump the oil
into the frypot after all sediment has been
removed and the drain valve is closed.
9. Allow the pump to run for 10-15 seconds
after air starts to flow through the wand,
before shutting off the filter. Clearing
residual shortening/oil from the return lines
reduces the likelihood of clogged lines.
NOTE: After filtering, scrape off debris and sediment accumulated on the filter paper and
discard into a fire-proof container.
If using solid shortening, the return hose must be completely drained after filtering,
or the shortening will solidify and plug the hose or oil return lines as it cools.
NOTE: If filtration operations problems are encountered during use, please refer to Chapter 6
in this manual.
CHAPTER 4: FILTER OPERATION
CAUTION
4-8