Samson 3374 - Set Point Adjustment

7-2 EB 3018 EN
Operation
7.1 Set point adjustment
The ow rate can be adjusted either when
the electric actuator is mounted on the valve
or without a mounted electric actuator.
The ow rate set point is determined by the
position of the restriction (2.7) on the valve.
Î The control and shut-off valves as well as
all consumers or a bypass valve (if in-
stalled) must be open to ensure that the
maximum ow rate is reached.
Î Set the required ow rate by adjusting
the restriction (2.7), while watching, for
example the reading of a ow rate mea-
suring unit at the heat meter.
Adjustment is always based on the closed re-
striction.
To adjust the ow rate, use the adjustment
diagrams for water (Fig.7-2, Fig.7-3 and
Fig.7-4).
Refer to the associated mounting and operat-
ing instructions (see documents listed under
'Referenced documentation' in the 'Safety in-
structions and measures' section) for further
possible settings of the electric actuator.
In addition to the details in the mounting and
operating instructions of the basic device,
adjust the ow rate as described in sec-
tions7.2.1 to 7.2.3.
Note
Observe the differential pressure across the
restriction
∆p
restriction
of 0.2bar or 0.5bar. It
is determined by the differential pressure
springs (14) installed in the actuator (see the
'Markings on the device' section).
Note