Handwheel; Manual Override Of Type 5825 Actuator - Samson 5824 Mounting And Operating Instructions

7 Handwheel

The handwheel is used to move the actuator
stem manually (approx. 4 turns for 1 mm)
when the power supply is disconnected.
Direction of action and travel can be read
off the travel indicator scale (Fig. 10).
Travel indication
scale
Direction
Fig. 10: Handwheel
Note
The positioning of the valve is affected when
the handwheel is operated while the process
is running. As a result, zero point and the
position feedback do not match the calibrat-
ed values. Zero calibration, initialization or
a transit time measurement must be per-
formed again.
EB 5824-2 EN
Handwheel
(Type 5824 only)
Actuator stem
Extends
Retracts
7.1 Manual override of
Type 5825 Actuator
DANGER
!
Risk of electric shock from exposed live
parts.
Do not touch live parts on operating the
manual override.
1. Unscrew front cover and place a 4 mm
Allen key on the red actuating shaft.
NOTICE
!
Risk of damage to the actuator by turning it
too far.
Only retract the actuator stem as far as the
final travel value.
2. Turn the Allen key:
Î Turn it counterclockwise only for a ver-
sion with fail-safe action "actuator stem
extends".
Î Turn it clockwise only for a version with
fail-safe action "actuator stem retracts".
3. Turn the Allen key only as far as the final
travel value, which is at the point where
the torque-dependent limit contact is acti-
vated (switching off the motor).
Once the magnet has been released, the
spring mechanism pushes the actuator
stem back to the fail-safe position.
4. Remove Allen key and carefully refasten
the front cover.
Handwheel
31