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18
AST 14 C 259/00
3.4 EXPANSION VESSEL
An increase of the heating water inside a closed circuit
corresponds to an increase of the water volume. As no further space is
available, it will not be water volume - but pressure - to increase. If
pressure value exceeds safety valve triggering point, this latter will open
and discharge water from system. This problem is prevented thanks to
an expansion vessel positioned inside circuit; vessel houses an air
diaphragm to be used to balance this overpressure.
Vessel capacity: 7 litres
3.5 FLUE GAS FAN
Compact boiler flue fan is of the asynchronous type. It is provided with a plastic
Pitot pipe to minimize the development of condensate on fan pressure measurement point,
and it is homologated to operate with the following models:
FIME
NATALINI
Technical Characteristics:
Fime Natalini
Power supply
230 Vac
Power
38 W
35 W
Worm screw
Die-casted Metal
sheet
WARNING: due to flue diaphragm compatibility, Natalini fan can be replaced with Fime
fan, but not vice-versa.
Fime model only is thus supplied as a spare part.