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DESCRIPTION OF THE UNIT
The warm air generator is basically a thermal unit that exchanges the products resulting from the combustion
of a forced draught burner for the air flow produced by a high-performing ventilation unit.
The air to be heated is sucked by the ventilation unit and, when it laps the hot surface of the heat exchanger,
it is heated - increasing its temperature; then it can be distributed both directly and through proper channels.
Thanks to its features, the centrifugal fan can be installed in plants requiring the distribution of the heated
through channels or, in general, where static pressure is needed.
Through this heating system, the plant costs can be remarkably reduced and a reliable operating economy
can be reached; therefore, it is particularly fit for those cases where it will be used occasionally and
discontinuously.
The specific hot air generator has been designed to be combined with a gas burner with variable thermal
power (two-stage or modulating); in reduced thermal power operation, the flue gas temperature drops below
the dew point, the condensation phenomenon starts, and recovery of the "latent energy" contained in the
water vapour that normally occurs in the chemical process of combustion takes place.
The high-quality materials used to manufacture the heat exchanger ensure safe and long-lasting operation
even under with condensation of the combustion products, which is discharged to the outside through a
dedicated connection.
Combination with a burner with variable thermal power allows the continuous and linear control of the thermal
power of the appliance in relation to the immediate needs of the user, maximising operating economy.
In summer, it is also possible to use only the fan unit.
CONSTRUCTION FEATURES AND GENERAL FUNCTIONS:
Heat Exchanger:
It is made of welded stainless steel, it can be easily inspected for ordinarily cleaning and maintenance
operations and it comprises the following elements:
•
Combustion chamber
made of
AISI 430 stainless steel
, with low thermal load, cylindrical or egg-
shaped and of the appropriate size.
•
Exchange elements
in
stainless steel AISI 304
stainless steel with a large surface, with turbulent
impressions and equipped with special reticular turbulators.
•
Smoke manifold
in
stainless steel
AISI 304
stainless steel, equipped with inspection door and
condensate discharge connection.
External casing:
The case is made up of removable boards of pre-painted sheets and/or powder-painted and it includes also:
•
Anti-radiant thermal insulation of the surfaces exposed to the heater irradiation.
•
Outlet flange to connect the warm air distribution circuit.
•
Intake flanged plenum to connect the treated air intake circuit.
The 3
8 type devices include a press-formed galvanised steel profile, which has been powder-painted with
corner-joints made of strong and special pressure-cast aluminium profiles, completely designed by the
Manufacturer.
