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5 Manual override
The direction of action and travel can be
read off the travel indication scale.
5.1 Type 5757/-7 Controller
with Electric Actuator
Caution!
Only activate the handwheel when the actu
-
ator is disconnected from the power supply.
4
Turn handwheel clockwise to extend the
actuator stem
4
Turn handwheel counterclockwise to
retract the actuator stem
5.2 Type 5724/5725 Controller
with Electric Actuator
Type 5724
Adjust the travel by turning the handwheel
(approx. 4 turns for 1 mm travel):
4
Turn clockwise to extend the actuator
stem
4
Turn counterclockwise to retract the
actuator stem
Type 5725
Caution!
The actuator is live!
1. Undo the front cover and place a 4 mm
hex screwdriver onto the red actuating
shaft.
2. Turn the screwdriver counterclockwise
only, and only until the travel final value
is reached at the maximum, which acti
-
vates the bottom torque switch (switching
off the motor).
Caution!
Turning the actuator too far will destroy
it.
After the fail-safe action has been trig-
gered by the magnet, the spring mecha-
nism pushes the actuator stem out and the
valve always move to its fail-safe position.
3. Remove screwdriver and carefully
refasten the front cover.
EB 5766 EN 13
Manual override
Handwheel
Handwheel
Handwheel
Travel indication Travel indication
Travel indication
Fig. 5 · Manual override of Type 5757/-7, Type 5724 and Type 5725 (from left to right)