Samson 3374 - Page 50

7-4 EB 3018 EN
Operation
With Type5827-A… Electric Actuator
1)
1. Retract the actuator stem by applying a
corresponding control signal from the
control device.
2. Loosen the locking screw (2.6) and turn
the set point adjuster (2.3) clockwise ()
as far as it will go to close the restriction
(2.7).
3. Determine the turns required to achieve
the desired ow rate from the adjustment
diagrams (see Table 7-1).
4. Based on a closed restriction, turn the set
point adjuster counterclockwise () to
adjust the ow rate set point.
5. Check the ow rate at the heat meter and
correct it, if necessary.
6. Once the ow rate is set as required,
lock the setting with the locking screw
(2.6).
7. Close a possibly open bypass valve
again.
8. Lead-seal the setting, if necessary.
Once the magnet has been released, the
spring mechanism pushes the actuator stem
back to the fail-safe position.
Note
7.2.2 DN65 to 100
Type5827-N3
2)
or Type3374 Electric
Actuator
Î Adjustment without actuator · See
Fig.7-1
1. Thread the lock nut (2.2) upwards on the
rod (2.1).
2. Loosen the locking screw (2.6) and turn
the set point adjuster (2.3) clockwise ()
as far as it will go to close the restriction
(2.7). Close the restriction (2.7).
3. Determine the turns required to achieve
the desired ow rate from the adjustment
diagrams (see Table 7-2).
4. Turn the set point adjuster (2.3) counter-
clockwise () by the corresponding num-
ber of turns.
5. Thread the lock nut (2.2) clockwise ()
as far as it will go onto the rod (2.1). The
restriction opens until the adjusted set
point is reached.
6. Check the ow rate and correct it, if nec-
essary. Secure this setting with the lock-
ing screw (2.6).
7. Retract the actuator stem (1.1) using the
manual override. Place the actuator on
the restriction connection. Secure it by
tightening the hex nut (1.3, see 'Tighten-
ing torques' in Annex).
8. Extend the actuator stem all the way to
the rod (2.1) using the manual override.
9. Position the stem connector (1.2) and fas-
ten with screws.
1)
Alternatively: Type5825
2)
Alternatively: Type5824-30