Samson series 43, Mounting And Operating Instructions

 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