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Operation
Adjustment
For valve sizes DN 15 to 25, adjust the flow
rate at the side adjustment screw (12)
For valve sizes DN 32 to 50, adjust the flow
rate at the adjustment screw (12) underneath
the cap using a 4 mm hex wrench. Proceed
as follows:
DN 15 to 25
Î For valve sizes DN 15 to 25, the regula-
tor is delivered with an open restriction
(1.2).
1. Close the restriction (1.2) by turning the
set point adjuster (22) or manual adjust-
er Ba43 clockwise ().
2. Fix the restriction (1.2) by turning the set
point screw (12) clockwise ().
3. Determine the number of turns of the
screw or adjuster required to achieve the
desired flow set point from the relevant
adjustment diagram.
For DN 15, the adjustment curve that
corresponds with the flow coefficient K
indicated on the nameplate must be se-
lected.
4. Based on a closed restriction (1.2), turn
the set point screw (12) counterclockwise
() to adjust the flow rate set point.
Check the flow rate at the heat meter and
correct it, if necessary.
5. Guide the wire through the lead-seal
hole (26) and lead-seal it to fix the ad-
justed flow rate.
7-2
NOTICE
!
Risk of damage to the restriction stem
through one-side loading (DN 15 to 25)
while turning the adjustment screw clock-
wise.
Completely close the restriction only by turn-
ing the set point adjuster (22) at the control
thermostat or using the manual adjuster
Ba43.
Do not use the side adjustment screw (12).
After reaching the closed position, fix this
position with the side adjustment screw (12)
and remove the manual adjuster Ba43 or
control thermostat again. Adjust the flow rate
at the adjustment screw (12).
DN 32 to 50
1. Unscrew the cap (14) and undo the lock
nut (13).
2. Close the restriction (1.2) by turning the
set point screw (12) clockwise ().
3. Determine the number of turns required
VS
to achieve the desired flow set point from
the relevant adjustment diagram.
4. Based on a closed restriction (1.2), turn
the set point screw (12) counterclockwise
() to adjust the flow rate set point.
Check the flow rate at the heat meter and
correct it, if necessary.
5. After the required flow rate is adjusted,
secure the set point screw (12) using the
lock nut (13). Screw cap (14) back on.
6. Guide the wire through the lead-seal
hole (26) on the valve and lead-seal it to
fix the adjusted flow rate.
EB 3132-3 EN
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