BKI DNF-F Doughnut Fryer - Manual (Page 19)

Doughnut Fryer Maintenance
17
Filtering Procedure
We recommend the shortening be filtered after every 3-5 frying loads. When the shortening starts to show
signs of foaming and has a bad taste, replace it. The fryer vat should be cleaned before refilling with new
shortening. Best results for filtering are obtained while the shortening is hot. You should filter at the end of
every business day.
Always wear appropriate personal protection equipment during the filtering
process to guard against possible injury from hot oil.
DNF-F
1. Set the POWER switch to ON and the FILTER MOTOR switch to OFF.
2. Make certain that the filter pad is clean and not torn.
IMPORTANT: Make certain the vat cover is properly positioned underneath the drain valve.
Also make certain the filter vat and filter screen is under the main drain valve before starting
the filtering process.
3. Move the DRAIN handle slowly to the OPEN position so that the shortening starts to flow
evenly. This is to prevent excessive splashing of hot shortening.
4. When the vat is empty, place the DRAIN handle in the CLOSED position.
Hot shortening may splash out of the vat causing severe injury when filling the
vat if the lid is not closed. To prevent shortening splashes, close the lid before
filling.
5. Close the lid to prevent shortening splashes.
6. Position the FILTER MOTOR switch to ON. Shortening will automatically pump into the vat.
7. After 1 minute carefully open the lid to check the level of the shortening.
8. Let the filter continue to pump the shortening until the fill mark in the fryer vat is reached or
until air starts bubbling through the shortening.
9. As soon as air is seen in the shortening, position the FILTER MOTOR switch to OFF to
prevent shortening degradation and prevent the filter pump and lines from filling up with
shortening.
10. Add new shortening if the fill mark has not been reached.