19
“Operation & Maintenance Manual”, “Discfilter HSF2600 series”
7. Adjust the backwash water flow using the bypass valve so that there is a small but constant
flow through the nozzles. This makes it easy to identify which nozzles need to be cleaned.
8. Check for clogged nozzles by comparing the water jets.
The operating time in this mode must be minimised in order to not risk the pump overheating.
9. Fully or partially clogged nozzles must be cleaned.
10. Remove the nozzle nut by turning it a ¼ turn anticlockwise. Do not lose the rubber seal!
11. Clean the nozzle using compressed air or a plastic brush.
Never
use a steel brush or metal
pins as these may damage the nozzle.
12. Fit the nozzle in reverse order. Check that the nut has reached the stop position once it
has been tightened a ¼ turn clockwise.
13. Turn the mode selector to the AUTO position.
14. Open the backwash water main valve and close the bypass valve.
15. Reset the backwash pipe to operating mode.
16. Close the filter cover
17. Start operation again as described in section 4.1.
A. Nozzle nut with
spray nozzle
B. Rubber seal
C. Nozzle
attachment
D. O-ring
E. Screw
D
E
B
A
C
Figure 6.6
Hydrotech backwash nozzles.
