Samson 2439, Mounting And Operating Instructions

Page: 25 / 40

EB 2185 EN 25
Mounting and start-up
5.3 Temperature sensor and
capillary tube
Risk of irreparable regulator damage
caused by the regulator components being
taken apart.
Do not separate the safety thermostat from
the capillary tube or temperature sensor.
Temperature sensor
The temperature sensor may be installed in
either a horizontal or vertical position. How -
ever, make sure its entire length is immersed
in the process medium to be controlled. It
must be installed in a location where over-
heating or considerable idling times cannot
occur.
For temperature regulators with safety tem-
perature limiter (TR/STL), install the sensor of
the limiter near the temperature sensor of the
regulator.
− Weld a welding socket with G ½ female
thread at the place of installation.
−
For better heat transmission, we recom-
mend filling the free space between sen -
sor and thermowell with oil or, when in-
stalled horizontally, with grease or any
other heat transfer medium. This prevents
heat transfer delays. Observe the ther-
mal expansion of the filling medium. Al -
low some space for expansion and do
not fill the entire free space or slightly
loosen sensor nut for pressure compensa-
tion.
NOTICE
!
NOTICE
!
− Seal the thermowell into the welding
socket.
Galvanic corrosion due to incorrectly se-
lected materials of the mounting parts.
On installing the thermowell in the pipeline,
only use similar materials (e.g. stainless steel
with stainless steel or copper together with
other copper materials).
Capillary tube
Carefully run the capillary tube (10) without
bending or twisting it. Avoid locations with
considerable ambient temperature fluctua -
tions along the entire length of the tube.
Do not damage or shorten the capillary
tube. Roll up excess tube to form a ring. The
smallest permissible bending radius is
50 mm.
NOTICE ! NOTICE !
NOTICE
!
NOTICE
!