AMOT 10GEF, Operation And Maintenance Manual, Page: 44 / 80

44
Electric Actuator
Rev 12 – NOV 2019 OMMG00012
circuit should be connected across the relevant switch to give a visible
indication of switch operation (refer to Fig 7, page 26 for terminal
numbers).
3 Open limit switch and end stop adjustment :
3.1 Manually wind the actuator fully counter-clockwise until the rotor
just covers the valve port.
3.2 If the actuator has Positioner fitted, turn the handwheel a further ¾
of a turn.
3.3 Loosen the grubscrew (23) in the lower limit switch cam (13)
3.4 Turn the cam until the limit switch is on the flat of the cam (switch
not pressed).
3.5 Slowly turn the cam clockwise until the first switch (Open limit
switch ‘OLS’) just operates.
3.6 Tighten the grubscrew (23).
Note
It is not possible to adjust the AOLS separately from the OLS.
3.7 Slacken the nut on the mechanical end stop screw nearest to the
handwheel, and turn the screw counter-clockwise by approximately
10 turns.
3.8 Turn the handwheel 2 turns counter-clockwise, and check that the
port has not started to open. If it has, then turn the handwheel
clockwise until the port is just closed.
3.9 On the mechanical end stop adjuster nearest to the handwheel, turn
the screw clockwise until it stops.
4 Close limit switch adjustment:
4.1 Manually wind the actuator fully clockwise until the rotor just covers
the valve port.
4.2 If the actuator has a Positioner fitted, turn the handwheel a further
¾ of a turn.
4.3 Loosen the grubscrew (10) in the upper limit switch cam (11).
4.4 Turn the cam until the limit switch is on the flat of the cam (switch
not pressed).
4.5 Slowly turn the cam counter-clockwise until the first switch (Close
limit switch ‘OLS’) just operates.
4.6 Tighten the grubscrew (10).
Note
It is not possible to adjust the AOLS separately from the CLS.