PE earth connection on housing plate has to be connected!
Figure 13: Electrical connection PE
Two adjustable position switches are installed to limit the stroke of the actuator, and cut-off the motor current in
the relative direction.
Most motors have a thermal switch, depending on the actuator type, to cut off the current in both directions when a
maximum temperature is reached (only at standard single phase power supply).
12. Commissioning
Close the cover.
Turning the handwheel, drive the valve to the middle position.
Switch the setting signal briefly to OPEN and CLOSE and check that the actuator operates in the correct
direction. If necessary, reverse the setting signal for OPEN/CLOSE.
Drive the actuator in either direction, using the setting signal until the position switch cuts-off. Check that the
position switch setting is correct. If necessary re-adjust the position switch (see chapter 9).
With power supply 24 VAC the open motor phase can produce voltages up to 35 VAC due to
motor generated induction voltage.
13. Service/maintenance
The actuators are maintenance-free if used under the operating conditions as established in the data sheet. The
gearboxes are lubricated for life and do not require further lubrication.
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