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Operation and maintenance, Discfilter HSF2600 - 2,3 series with PFLC
4.2.1 Level differences
The maximum permitted difference
between the water levels inside and outsi-
de the drum is 250 mm during normal ope-
ration (see Figure 4.3). The recommended
level difference is 100-200 mm.
If an even flow after the filter is required,
the filter must be run with a small level dif-
ference.
The filter must be installed so that
the level difference in the event of
operating disturbances under no
circumstances exceeds 450 mm.
The filter shall be operated so that the level difference during normal operation does not
exceed 250mm.
Prolonged operation with a greater level difference will significantly shorten the life of the
filter panels and other vital parts.
4.2.2 Operating mode AUTO – Automatic level control
With automatic level control, drum rotation and the backwash pump are activated once the le-
vel difference between filtered and unfiltered water exceeds an adjustable value. The filter is
force-started if the filter has stood still for an extended period of time. If an external backwash
water supply is used, the level sensor controls a solenoid valve instead of a pump.
The water level inside the drum will vary when AUTO mode has been selected. The water le-
vel is at its lowest immediately after a backwash cycle, and then rises until the level difference
between filtered and unfiltered water becomes too high.
4.2.3 Operating mode REMOTE – Remote control
In REMOTE operating mode, the filter can be controlled remotely. In remote control mode, the
filter can either be controlled as if in AUTO operating mode or using an external controller, see
the “Automation manual”.
Figure 4.3 Maximum permitted level difference during level-con-
trolled operation.
