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Operation
4. Based on a closed restriction, turn the set
point adjuster counterclockwise () to
adjust the flow rate set point.
5. Check the flow rate at the heat meter and
correct it, if necessary.
6. Once the flow 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.
Note
Once the magnet has been released, the
spring mechanism pushes the actuator stem
back to the fail-safe position.
7.2.2
DN 65 to 100
Type 5824-30 or Type 3374 Electric Actua-
tor
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 flow rate from the adjustment
diagrams (see Table 7-2).
7-4
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 flow 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 clamps (1.2)
and screw them tight.
10. Thread the lock nut (2.2) all the way to
the top toward the stem connector
clamps (1.2) and lock in place (see
'Tightening torques' in Annex).
Î Adjustment with actuator · See Fig. 7-1
More details on the Type 5824-30 Electric
Actuator in u EB 5824-1 and u EB 5824-2;
more details on the Type 3374 Electric
Actuator in u EB 8331-3 and u EB 8331-
4.
EB 3018 EN
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