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25
AST 14 C 255/00
AUTOMATIC FILLING SOLENOID VALVE
(only for CTFS version)
Besides the standard filler cock, the boiler features an automatic filling valve, directly
controlled by the boiler electronic board.
A specific parameter (P94) can be used to enable the solenoid valve and to change the
operating logic values (refer to paragraph “Automatic filling function” on page 80 for more
details).
3.3 EXPANSION TANK
An increase in heating water temperature inside a closed
circuit corresponds to an increase in the water volume. As no
further space is available, the increase will affect the pressure
and not the volume. If pressure value exceeds safety valve
triggering point, this latter will open and discharge water from the
system. To prevent such occurrence an expansion tank is
positioned inside the circuit; the vessel houses an air diaphragm
used to balance overpressure.
Vessel capacity:
7 litres
WARNING: the expansion tank is in front
of the combustion chamber within a
containment tank.
The boiler is provided with an internal hook
to support the vessel during maintenance
(see picture on the side); it does not need
to be disconnected from the hydraulic line.
Technical characteristics:
Operating voltage: 230 Vac, 50 Hz
Resistance: 1.142 K
Ω
