ISOTHERM-IM-DE-W-UK-01-2021-Rev0 | Part no. 10019091
7
EN
ENGLISH
8.2 Temperature limiter
In the event of a fault, the temperature limiter switches
off the circulation pump and so avoids overheating of
the surface heating system.
• The factory setting of the temperature limiter is 55 °C or
65 °C, depending on the version.
• The temperature limiter must be fitted to the supply pipe of
the control station heating circuit manifold.
8.3 Initial commissioning
All screw fittings must be checked and tightened if
necessary prior to installation and commissioning!
Torques of the fittings:
¾" fittings: 35 Nm
1" fittings: 55 Nm
1. Connect the control station to the pipe network.
2. Fill, flush and vent the heating system.
NOTICE
Flushing is permitted only in the direction
of flow of the heating circuits, i.e. the water must enter
through the supply manifold pipe and come out of the
return!
The drain must always be open, as otherwise the high
water pressure could damage the heating system.
The instructions on flushing in the operating manual for
the heating circuit manifold must also be observed.
8.4 Setting of the target supply temperature
In the event of maximum heat output demand (rated
output), the boiler supply temperature must be at least
15°C higher than the desired supply temperature in
the surface heating circuit!
Factory setting of the target supply temperature
is 44° C
or 55 °C, depending on the version of the control station. The
pilot pin is flush with the setting hand wheel face. By turning
the setting hand wheel in minus "
-
" or plus "
+
" direction the
target supply temperature is changed accordingly.
The hand wheel clicks with the rotation. Each "click" means a
target temperature change of approx 1 °C.
Fig. 8-4: Factory setting
Reduction of the target supply temperature
: by turning
the setting hand wheel in the clockwise direction ("
-
").
If the pilot pin moves out from the setting hand wheel, this
entails a lower target temperature (see Fig. 8-5 Reduction of
the target supply temperature).
Each "click" in the clockwise direction reduces the target
supply temperature by approx 1 °C.
Fig. 8-5: Reduction of the target supply temperature
Increase of the supply temperature set point:
by turn-
ing the setting hand wheel in the anti-clockwise direction ("
+
"
direction).
If the pilot pin moves into the setting hand wheel, this entails
a higher target temperature (see Fig. 8-6: Increase of the tar-
get supply temperature).
Each "click" in the anti-clockwise direction rises the target
temperature by approx 1 °C.
Fig. 8-6: Increase of the target supply temperature
The set temperature range is between 30 and 50 °C or
45 and 60 °C according to the version of ISOTHERM.
However, the setting hand wheel can be turned fur-
ther in both directions. This causes only small chang-
es of the target temperature outside of the tempera-
ture range.
