10
EB 2172 EN
Operation
4.3 Additional components
We recommend installing a hand-operated
shut-off valve upstream of the strainer and
downstream of the regulator to be able to
shut down the plant for cleaning and mainte-
nance, and when the plant is not used for
longer periods of time.
To check the adjusted set point, we recom-
mend installing a thermometer immersed in
the medium to be controlled near the sensor.
5 Operation
See Fig. 1.
5.1 Start-up
Î
Put the temperature regulator into opera-
tion after mounting the valve and control
thermostat.
Î
Fill the plant slowly with the process me-
dium (without pressure surges).
Slowly open the hand-operated shut-off
valve downstream of the valve and then
the shut-off valve upstream of the valve.
Î
Check the adjusted temperature set point
at the thermometer installed near the
temperature sensor.
5.2 Adjusting the set point
To adjust the set point, turn the black plastic
adjuster while watching the reference ther-
mometer.
–
Turn clockwise (
) to reduce the tem-
perature.
–
Turn counterclockwise (
) to increase the
temperature.
The adjustment diagrams (see Fig. 3) can be
used as a guide to find the first approximate
value.
Tip:
Higher set point temperatures can be
adjusted in increments as required.
However, to lower the set point tem-
perature, proceed in steps of 10 to
20 °C. When doing so, wait for the
process medium to cool down before
continuing. Watch the thermometer.
Table 1:
Set point ranges
Set point
range in °C
Set point change
per turn
Sensor Ø
0 to 35 °C
2.5 °C
9.5 mm
2 °C
16 mm
25 to 70 °C
3 °C
9.5 mm
2 °C
16 mm
40 to 100 °C
4 °C
9.5 mm
3 °C
16 mm
50 to 120 °C
4 °C
9.5 mm
4.5 °C
16 mm
70 to 150 °C
4.5 °C
9.5 mm
5 °C
16 mm
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