Samson series 43, Translation Of Original Instructions

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EB 2430 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
Î
See Fig. 3-1
The Type 2430 Control Thermostat with set
point adjuster, capillary tube and tempera-
ture sensor is mounted to a valve (Series 43
Regulators). The control thermostat for stan-
dard temperature control operates according
to the adsorption principle. The control ther-
mostat for instantaneous water heating oper-
ates according to the vapor pressure princi-
ple.
The temperature of the medium creates a
pressure in the sensor (19) which is propor-
tional to the measured temperature. This
pressure is transferred through the capillary
tube (10) to the operating element (13) and
converted into a positioning force. The valve
stem is moved by the operating bellows (9)
and pin of the operating element (12).
By turning the set point adjuster (8), the
point of response and the set point are
changed over the spring (7).
The control thermostat operating according
to the adsorption principle is filled with CO
2
,
whereas the control thermostat operating ac-
cording to the vapor pressure principle con-
tains a hydrocarbon mixture.
Due to their design, control thermostats func-
tioning according to the adsorption principle
can be mounted in any position. The design
of vapor pressure thermostats necessitates a
certain mounting position of the sensor and
use without thermowell.
Version with safety thermostat
When a Type 2439 or Type 2403 Safety
Thermostat is attached to the control thermo-
stat, this combination functions as a safety
temperature limiter (TR/STL) or a safety tem-
perature monitor (TR/STM).
Details in mounting and operating instruc-
tions
u
EB 2185 (STL);
u
EB 2083 (STM).