Rizzoli RT Série Manuel D'utilisation page 90

4.1 WORKING OF THE THERMAL COOKER
During the working, inside the thermal
cooker happens a combustive reaction
of combustible (the wood inserted in the
combustion chamber)
(the oxygen present in the air of the room
in which the thermal cooker is placed).
The wood fired thermal cooker makes
an intermittent combustion: after the
lighting, the combustion goes on till the
exhaustion of the combustible but it can be
maintained lighted by making another load
of combustible and so on. The maintenance
of the combustion in time is guaranteed by
the correct working of the chimney, which
allows to evacuate the fumes and in the
same time to feed the flame with comburent
air. In this way, the features of the chimney
have a big influence on the correct working
of the thermal cooker. The combustion of
4.2 STARTING
Picture 24 - Starting key. With lever outside, the key is open and the starting is easier; with lever inside the key is closed
for the normal working
To allow an easier lighting of the thermal
cooker with cold chimney, wood fired
thermal cookers are endowed with starting
key governed by a rod: if you extract this
rod, the key opens. The opening of the key
creates a direct connection between the
combustion chamber and the chimney, in
order to obtain a better draught. To light the
fire, you can use well dried wood, very subtly
cut, together with the specific products you
can find in commerce. The combustion may
4. USE
wood requests that the air flow inside the
combustion chamber happens in different
points to obtain the maximum efficiency.
and comburent In particular, it is present a primary air
feeding that flows in the lower part of the
combustion chamber by the grill, and one
or more secondary air feedings that flow in
the upper part of the combustion chamber.
The primary air is the main air and regulates
the combustion speed. The secondary air
allows the post-combustion of the fumes,
generating further heating, knocking down
the amount of harmful gas and so improving
both the rendering and the impact on the
environment. Once started the combustion
it cannot be interrupted in a safe way: it
must be always faded out naturally with the
exhaustion of all the combustible inserted.
be difficult as long as the chimney is cold.
The necessary time depends on the chimney
and on the weather conditions. When the
fire becomes powerful you must turn off
the key in order to force the fume to heat
the other parts of the thermal cooker. The
thermal cooker is designed to work with the
key turned off, the use with the key opened
does not allow the thermal cooker to work
at its best and may cause overheating and
consequent damages.
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