Removal; Construction With Integrated Yoke - Samson 3374 Mounting And Operating Instructions

12 Removal

DANGER
!
Risk of fatal injury due to electric shock.
− Before disconnecting live wires, switch off
the supply voltage at the actuator and
protect it against unintentional
reconnection.
12.1 Construction with inte-
grated yoke
Actuator without fail-safe action
1. Switch off the supply voltage and protect
it against unintentional reconnection.
2. Make sure that a signal from the control-
ler cannot act upon the actuator. If neces-
sary, disconnect the wires connecting the
controller.
3. Disconnect the wires of the connecting
lines at the actuator.
4. Remove the connecting lines.
5. Retract actuator stem as described in the
'Operation' section.
6. Undo the stem connector parts between
the plug and actuator stems.
7. Loosen the nut at the yoke.
8. Lift the actuator off the valve.
Actuator with "stem extends" fail-safe
action
1. Make sure that a signal from the
controller cannot act upon the actuator. If
necessary, disconnect the wires
connecting the controller.
EB 8331-3 EN
2. Retract actuator stem as described in the
'Operation' section.
3. Undo the stem connector parts between
the plug and actuator stems.
4. Loosen the nut at the yoke.
5. Lift the actuator off the valve.
6. Disconnect the supply voltage and pro-
tect it against unintentional reconnection.
Î The actuator stem moves to the fail-safe
position.
7. Disconnect the wires of the connecting
lines.
8. Remove the connecting lines.
Actuator with "stem retracts" fail-safe
action
1. Disconnect the supply voltage and
protect it against unintentional
reconnection.
Î The actuator stem moves to the fail-safe
position.
2. Make sure that a signal from the
controller cannot act upon the actuator. If
necessary, disconnect the wires
connecting the controller.
3. Disconnect the wires of the connecting
lines at the actuator.
4. Remove the connecting lines.
5. Undo the stem connector parts between
the plug and actuator stems.
6. Loosen the nut at the yoke.
7. Lift the actuator off the valve.
Removal
12-1