Ferroli Domina Oasi F 24 E, Техническое руководство

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DOMINA OASI F 24 - 30 E
FERELLA BOIL F 24 - 30 MEL
KEA AIR COMPACT E
Version - 09.2002
2.5 Fume circuit
Fume deflector and manifold
All forced-flow boilers have a fume deflector above the exchanger whose main
task is to make the secondary air crossing the burners uniform, making the
flame homogeneous and stable. The fumes then reach a fume manifold whose
job is to make them move on to the fan.
Airtight chamber
Its task is to isolate the products of combustion from the area surrounding the
boiler. The airtight chamber contains all the components involved in the fume
routing. The wires and pipes coming out of its side or lower portion are insulated
with silicone seals, while its upper portion is fitted for hooking up with the flues.
The cover is sealed off with a porous plate and is fitted with two plugs for using
a probe to analyse the fumes and combustion air.
Fan and pressure switch points
Powered at 230V/50Hz by the card (X6 - 7/8), the fan has
the job of expelling the products of combustion from the
fume chamber. A plate is normally placed above the
exchanger to act as a deflector, make the incoming air from
the bottom of the burner uniform, make the flame stable and
obtain the required air/gas ratio. In order to make sure the
fan works properly, there are two pressure points inside it.
The first one detects a "static" pressure signal that is
positive, the second one detects a "dynamic" pressure
signal via an appropriate "Venturi tube", which is negative.
With the difference in pressure detected by the two test
points it is possible to check whether the fumes are
adequately evacuated.