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GENERAL
INFORMATION
DESCRIPTION
The hot air generator is essentially a heat exchange unit between products of the combustion of a
single-stage blown-air burner and a flow of air produced by a high-performance fan unit.
The air to be heated is drawn in by the latter and by touching the hot surfaces of the heat
exchanger it is heated increasing in temperature; it can then be distributed either directly or
through suitable 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.
In summer, it is also possible to use only the fan unit.
GENERAL
INFORMATION
DESIGN SPECIFICATIONS
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:
▪
STAINLESS STEEL AISI 430
stainless steel combustion chamber
with low thermal load,
cylindrical and with volume.
▪
Steel exchange elements
with a large surface, with a decreasing section and with opposing
turbulencing prints.
▪
Steel flue gas manifold
,
equipped with an inspection door.
External casing:
The casing consists of panels in pre-painted and/or powder-coated sheet metal and also includes:
▪
Anti-radiant thermal insulation of the surfaces exposed to the heater irradiation.
▪
Plenum for direct air diffusion with delivery nozzle on the four sides and adjustable horizontal
fins that can be closed to exclude one side if necessary.
▪
Pre-cut hole to connect another secondary hot air distribution circuit.
▪
Cover to protect the burner and the tank (where present), with large inspection door.
Fan assembly:
It consists of a centrifugal fan with a low level of sound emission and high performance.
Safety and control thermostat:
The appliances are equipped with thermostats with sensitive elements positioned on the air
delivery (pre-calibrated and electrically connected at the factory), with the following functions:
▪
"FAN" function
(FAN thermostat
– calibration +35°C), it activates the fans max. 60 seconds
after the burner has started and it stops them approx. 4 minutes after it has stopped. Thus, it
prevents unpleasantly cold air from being released in the room when the machine is activated
and the thermal energy accumulated by the heat exchanger can be exhausted, by completely
using it before the machine stops.
▪
"LIMIT" function
(LM Thermostat - sealed calibration: +100 °C): it stops the burner if the air is
abnormally overheated. It shall be manually restarted.
