58300000111195_ARA_en_f.doc – 02.06.09 Seite 23 von 102
4.2.2 Connection diagram
The flowmeter itself does not supply an output voltage but simply
switches the signal connection to 0 volt earth (actuated) or leaves it
open (unactuated). Square pulses are generated in the upper
section of the housing via the Hall-IC.
Wrong connection of + voltage, signal and earth destroys the
flowmeter.
Prevent inductive faults via the cable!
Do not lay the cable together with supply cables to
consumers.
4.3 Heater and NTC-sensor
4.3.1 Heater (Instantaneous water heater)
In the instantaneous water heater the water for coffee production or
hot water/steam purchase is heated up.
Therefore the water is pumped in a stainless-steel pipe (A), which is
cast in together with a heating resistor (B) in an aluminum block.
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