Samson 3374 Series - Manual Mode; Mechanical Override

8-4 EB 8331-4 EN
Operation
8.2 Manual mode
The actuator stem can be moved mechanically or electrically.
8.2.1 Mechanical override
Themechanicalmanualoverrideisperformedbyplacinga4mmhexwrenchontheredac-
tuator shaft located at the side of the housing. It can only be performed when the actuator is
not connected to the supply voltage. The hex wrench is included in the scope of delivery. It is
attachedtothebottomofthehousing(seeFig.8-1).
Optionally, the actuator can be delivered with handwheel for mechanical override.
A mechanical override is not possible for actuators with fail-safe action. These actuators do
not have a hex wrench.
Turn the hex wrench clockwise to move the actuator in 'aL' direction and counterclockwise to
moveitinthe'eL'direction(seeFig.8-1).
Î Do not operate the manual override while the actuator is in operation or while the volt-
age supply is still connected.
eL
aL
Actuating shaft for
mechanical manual
override
Direction of action
Hexwrench
Fig.8-1: Mechanical override
Note