Service Manual
VCIOM-16909-EN Rev. 0
October 2021
10
Section 4: Manual Actuator Operation Under Maintenance
Manual Actuator Operation Under Maintenance
Section 4: Manual Actuator Operation
Under Maintenance
4.1
Manual Operation
The manual operation is only possible if the actuator is delivered with the optional handwheel. This
option allows an adjustment of the valve in de-energized state.
!
CAUTION
•
By activating the manual drive, the fail-safe function is disabled.
•
By activating the manual drive, the electrical function of the drive is disabled.
In normal operation, the handwheel (9) has no effect, it rotates idly by.
NOTE:
The manual mode can be activated only when the drive is in the fail-safe position.
Figure 3
Manual handwheel operation
9. Handwheel
10. Coupling Rod
11. Padlock