Kessel Comfort PLUS Originalbetriebsanleitung Seite 47

4.3 Connecting the level detection
An overview of connections on the PCB can be found at the end of this document.
Pressure sensor (option)
If a pressure sensor is to be used to detect the filling level it has to be connected as
follows.
Slide the air hose of the pressure sensor onto the connecting nipple of the pressure
pipe connection (1) and fasten with the lock nut. Always lay the air hose on a
gradient.
With lengths over 10m or if the air hose has a counter slope, use a compressor set
for air bubbling (see KESSEL accessories).
Fig. [5]
010-700_01 Installation and operating manual 47