VS 97.52.74.00.00 08/08
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5.5 Direction of rotation of the fan
The direction of rotation of the fan is shown by an arrow on the fan housing. The direction
of rotation of the fan is also shown in the top of the air outlet on the dust collector. The
direction of rotation of the fan is indicated by an arrow and must be clockwise.
Warning:
- When working on the equipment, always disconnect the power supply to the
equipment.
- Switch the dust collector on and immediately off again.
- Check the direction of rotation.
- If the direction of rotation is incorrect (anticlockwise), interchange two phases in the
terminals L1, L2, L3, or in the mains connection.
Note:
- It is essential that the direction of rotation of the fan is correct. If the direction of
rotation of the fan is incorrect, it will only supply approx. 40% of its intended air
volume.
6 Options
6.1 Differential pressure switch
If the differential pressure above the filter gets too high, the differential pressure switch is
activated. The dust collector then switches off. Once the fan has stopped, cleaning by
vibration is started. The user can opt for a manual restart or an automatic restart of the
dust collector depending on the position of function switch 2 in the control unit (see
Figure 6). When set to automatic restart (pos. 1), the dust collector automatically restarts
after the cleaning cycle. When set to manual restart (pos. 0), the dust collector has to be
restarted manually after the cleaning cycle.
The differential pressure switch is connected to terminals 9 and 11 (see Figure 5).
6.2 External start/stop
The fan can be started and stopped using external switches.
The switches are connected to terminals 6, 7 and 8 (see Figure 5).
6.3 Emergency stop
The emergency stop switch can be connected to terminals 15 and 16 (see Figure 5).
To do this, remove the interconnection between the terminals and replace this with the
switch.
When the switch is open, all power to the control unit is switched off and the dust collector
will stop. All time intervals will be reset. Closing the switch returns the control unit to
stand-by state.
