Samson 3274 - Preparation for Installation; Mounting the Actuator

EB 8340 EN 5-3
Installation
5.2 Preparation for installation
Beforeinstallation,makesurethefollowing
conditions are met:
− The actuator is not damaged.
Proceed as follows:
Lay out the necessary material and tools to
have them ready during mounting.
Risk of actuator damage through opening
the device.
Î Do not unscrew screws on the top hous-
ing cover.
Î Do not open the top housing cover.
5.3 Mounting the actuator
Proceed as follows if the valve and actuator
have not been assembled by SAMSON, pro-
ceedasfollows(Fig.5-2):
Î Check whether the actuator stem is re-
tracted.
Î Perform electrical connections of actuator
withelectricoverride(seesection5.7).
Disconnect isolating terminal 81 and re-
tract the actuator stem electrically (see
the 'Operation' section).
Î For versions with mechanical override,
press the button on the top of the hous-
ing. Use an Allen key to operate the
rack-and-pinion gear to retract the actu-
ator stem.
NOTICE
!
For versions with "actuator stem extends"
fail-safe action, the supply voltage must re-
main connected to L and N while mounting
the actuator to keep the actuator stem in the
top end position.
DN15to80(Series240)
3. Replace the stem connector nut (9.3) on
the valve plug stem (9.5) with an exter-
nalØ10mmwithaØ16mmnut(order
no. 0250-0674).
4. Turn the stem connector nut (9.3) and
adjustthedimensionxto75mmwitha
closed valve and tighten lock nut (9.4).
Tightening torque 150Nm
5. Place the actuator onto the valve bonnet
and secure using the ring nut (8.1).
Tightening torque 150Nm
6. Push the plug stem (9.5) upward. Con-
nect the stem connector nut (9.3) and ac-
tuator stem (5.6) using the stem connec-
tor clamps (8.2) and fasten together us-
ing the screws.
7. Move the valve to the end position and
align the travel indicator scale (9.2) with
the tip of the stem connector.
Note