14
Operation and maintenance manual for
Hydrotech Discfilter HSF31-series
5.2.Control.settings
The control system for the HSF31-series must
always
be provided with a
frequency converter. It is pre-calibrated at factory if delivered from Hydrotech.
For soft start of the drive motor, the settings on the frequency converter must
be adjusted to min. 3s ramp up and min. 1s ramp down.
The filter operates with 50 Hz as standard.
If the filter is equipped with a Hydrotech standard control, the filter has two
operation modes:
1. Continuous rotation (HAND mode)
2. Automatic level control (AUTO mode).
Use the selector switch to select operation mode (see
5
in
Figure 5.2
).
Warning lamps:
1
Drum drive tripped
2
Warning lamp: Pump tripped
3
Warning lamp: Dry running of
pump
Other items:
4
Reset button for dry running
5
Selector switch (Hand/Auto)
6
Pump switch
7
Safety switch
8
Time relay
9
Level relay
10
Fuse
11
Frequency converter
12
Safety switch
13
Motor protection: Pump
14
Motor protection: Drive motor
8
11
9
10
12
13
14
1
4
2
3
5
7
6
Figure 5.2 Hydrotech standard control cabinet (optional)
(The design of the control cabinet is often adapted to each application)
