23
Installation, Operation and Maintenance Manual
MAN 607 Rev. 6
February 2022
Section 3: Operation and Use
Operation and Use
3.5
Calibration of Microswitches
(Biffi Limit Switch Box Only)
NOTICE
Operate only the microswitch corresponding to the direction of operation being carried
out, as clearly reported on the microswitch.
!
WARNING
If different microswitches assembly or limit switch box is supplied, please refer to the
specific documentation.
Microswitches are placed inside a special box (Figure 23).
For microswitches calibration, please refer to the relative wiring diagram and follow
these steps:
•
Unscrew the fastening screws of the cover (Figure 23).
•
Remove the cover paying attention not to deteriorate the gasket and the
cylindrical and flat coupling surfaces.
•
Operate the actuator (in opening or closing).
•
Unscrew the screw of the operating cam relative to the microswitch to calibrate
and adjust it according to the settings (Figure 24).
•
Tighten the screw.
•
Operate the actuator and adjust any other microswitch 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 25).
•
Tighten the screws.
Figure 23
Microswitches box
