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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
4. Remove the nozzle nut of a clogged nozzle by turning it a ¼ turn anticlockwise. Exercise care
so as not to lose the rubber seal.
5. Clean the tip of the nozzle with compressed air or with a plastic brush. Never use a steel brush
or metal pins as these may damage the nozzle.
6. Assemble the parts in the reverse order. Make sure the nozzle nut reaches the stop position
when turned a ¼ turn, clockwise.
7. Turn the mode selector to the ON (1) position and the main power switch to the ON (1) position.
8. Open the main valve for the wash water.
9. Refit the removed covers and lock them in place.
10. Start operation again as in section 6.1 (Check measures for restart).
It is important that the nozzle nuts (see Figure 8.3.1) are refitted correctly after the nozzles
have been cleaned. If a nozzle nut loosens, the nozzle tip will fall out and the water jet
created will then destroy the filter fabric.