Samson EB 2111 - Excess Temperature Safeguard of the Thermostat

7-2 EB2111/2121/2123 EN
Operation
Higher set point temperatures can be adjust-
ed in increments as required. However, to
lower the set point temperature, proceed in
steps of 10 to 20°C. When doing so, wait
for the process medium to cool down before
continuing. Watch the thermometer.
7.2 Correcting the set point
dial
There are many ways to combine the tem-
perature regulators with thermostats that
have varying proportional control action. As
a result, the temperature adjusted on the dial
often deviates from the actual temperature
(measured by a reference thermometer).
The temperature can be corrected by turning
the dial housing:
1. Undo the screw labeled "Korrektur" on
the back of the dial housing.
2. Turn the entire dial housing until the dial
shows the same temperature as the refer-
ence thermometer.
Viewed from the front with the dial housing
ontop.A360°turncorrespondstoaset
pointchangeofapprox.1.5°C.
Note
7.3 Excess temperature safe-
guard of the thermostat
Normal state
Stem of the set point
adjuster projecting out
of the housing indicates
an excessively high
temperature!
Fig.7-1: Excess temperature indication
The temperature will exceed the adjusted lim-
it if the valve cannot close due to dirt parti-
cles lodged between the seat and plug or
due to a defective bellows. In this case, the
excess temperature safeguard responds. The
stem of the set point adjuster projecting out of
the housing indicates an excessively high
temperature at the sensor meaning a mal-
function exists (see Fig.7-1).
The regulator must be repaired or serviced.