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Operation
NOTICE
!
Do not adjust the set point to a value on the
scale lower than 1. Under unfavorable con-
ditions, the set point cannot be adjusted any-
more as a result. In this case, the following
action is recommended:
− Relieve the regulator of pressure.
− Turn the manual adjuster counterclockwise
as far as it will go to its lowest position.
− Turn the manual adjuster back clockwise
at least past the value '1' to '2' on the
scale.
− The set point can be adjusted again.
24
6.1.2
Adjusting the flow
limitation
NOTICE
!
Set point adjustment is always based on a
closed restriction (1.2).
How to proceed:
1. To achieve the maximum flow rate, all
control and shut-off valves as well as all
consumers including the motorized valve
must be open (to ensure minimum drag
in the plant).
2. Close the bypass valve, if installed.
3. Unscrew the cap (18).
4. Undo the lock nut (16) and adjust the set
point screw (17, hexagon socket screw
SW 4):
Turning it clockwise () closes the re-
striction; the flow rate drops.
Turning it counterclockwise () opens the
restriction; the flow rate rises.
6.1.3
Based on a known plant
pressure drop
To adjust the flow rate limit when the pres-
sure drop of the plant is known, use the ad-
justment diagrams for water (Fig. 9, Fig. 10
and Fig. 11).
EB 3130 EN
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