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The warm air heater is suitable for the following uses:
a) WR KHDW WKH DLU FRQYH\HG E\ LWV IDQ XQLW through the external walls of its
combustion chamber and heat exchanger.
b) IRU YHQWLODWLRQ RQO\.
To use it as per point (a), the heater is to be equipped only with a forced-air gas burner,
(see list of the matches heater/gas burner at page 12) or liquid fuel. Moreover, it must be
connected to the electric line, to the fuel pipe and to a chimney.
To use it as per point (b), it's enough to connect it only to the electric mains line.
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The warm air heater is composed of an aluminium frame and of an external panelling in
prepainted sheet: inside the panels are protected by a glass wool mattress. In the
heating section there are a combustion chamber and a heating exchanger. The
insulating mattress is protected in this area by galvanized sheet iron, against the
overheating dangers. Under the combustion chamber, in the ventilating section, is
assembled a centrifugal fan with double suction (galvanized), driven by an electric motor.
A hands protection grate with holes 10x10 mm. is provided in the ventilating unit. The
grate is screwed on the frame and can be removed only with the help of a tool. The
combustion chamber, built in stainless steel for high temperatures is bolted on the frame,
so that its thermal expansions don't influence the long life. The heat exchanger, built with
normal steel pipes, is strongly welded to the combustion chamber. Inspection and
maintenance operations may be carried out through large openings on them.
In the low ventilating section there is a control board with:
- Main switch - commutator "HEATING-STOP BURNER-VENTILATION" - Voltage light - .
The warm air heater is equipped with a combination of 3 thermostats placed on the heat
exchanger, assuring the following control and safety functions:
)$1 thermostat normally opened, to start and stop automatically the ventilating
-
unit during "HEATING" phase (calibration at 30° C).
/,0,7 75 temperature limit thermostat for the burner, normally closed, to stop
-
the burner, when the outlet air temperature goes over the calibrate value. It resets
automatically the burner, when the air goes cooler (calibration at 80° C).
/,0,7 +21(<:(// security limit thermostat for the burner, normally closed,
-
to stop safety the burner, in case of abnormal over heating of the outlet air
temperature. The resetting of the burner follows by cooling the air and then
pushing manually the resetting button of LIMIT2 (calibration at 100° C).
2
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