Manual Mode; Mechanical Override - Samson 3374 Series Mounting And Operating Instructions

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.
Note
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.
Direction of action
Fig. 8-1: Mechanical override
8-4
Actuating shaft for
mechanical manual
eL
override
aL
Hex wrench
EB 8331-4 EN