20
October 2020
Installation, Operation and Maintenance Manual
VCIOM-15792-EN Rev. 0
Section 3: Operation and Use
Operation and Use
3.5
Calibration of Micro-Switches
(For Bettis Limit Switch Box*)
!
WARNING
*If different micro-switches assembly or limit switch box is supplied, please refer to the
specific documentation.
NOTICE
Operate only the micro-switch corresponding to the direction of operation being carried
out, as clearly reported on the micro-switch.
Micro-switches are placed inside a special box (Figure 14).
For micro-switches calibration please refer to the relative wiring diagram and
follow these steps:
•
Unscrew the fastening screws of the cover (Figure 14).
•
Remove the cover paying attention not to deteriorate the gasket and the
cylindrical and flat coupling surfaces.
•
Operate the actuator (in opening or closing) with local pneumatic or hydraulic
operation (Section 3.3).
•
Unscrew the screw of the operating cam relative to the micro-switch to calibrate
and adjust it according to the settings (Figure 15).
•
Tighten the screw.
•
Operate the actuator and adjust any other micro-switch with the procedure
already described.
•
Position the cover making sure the cam-carrier shaft grips with the index dragging shaft.
•
Check that the cover and the index show the proper position of the valve (Figure 16).
•
Tighten the screws.
Figure 14
Micro-switches box
