Use - Rizzoli ZVI Gebrauchsanweisung

3

USE

3.1 WORKING OF THE COOKER
During the working, inside the cooker happens a combustive reaction of combustible (the wood inserted in the combustion chamber) and burning (the oxy-
gen present in the air of the room in which the cooker is placed). The wood fired 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 cooker.
The combustion of wood requests that the air flow inside the combustion chamber happens in different points to obtain the maximum efficiency. In particu-
lar, 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.
WARNING! For the correct working of the wood fired cooker verify that the passage of comburent air is not obstructed or, in case of con-
nection with external air intake, that the air aspiration grill is not obstructed.
3.2 STARTING
To allow an easier lighting of the cooker with cold chimney, wood fired 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 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 cooker. The cooker is designed to work with the key turned off, the use with the key opened
does not allow the cooker to work at its best and may cause overheating and consequent damages.
Picture 18 - 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.
WARNING! It is important that the wood starts to burn quickly. The lighting of a big amount of wood in starting phase can cause an exces-
sive production of smoke and a quick gas emission with consequent damage to the cooker.
3.3 AIR INTAKE REGULATION
The entrance of comburent air inside the device is ruled by a valve controlled by a lever placed below
the fire door. The valve is closed in the right position while it is open in the left position. For the regula-
tion of this device see picture 19. If the device has the flue outlet on the left side, the regulation of the
lever is symmetrical (valve closed in left position, open in right position).
The secondary air is automatically controlled according to both the opening setting of the air inlet lever
and that of the primary air and the actual operating conditions and draft of the appliance.
The air introduced at the fire door is fixed and set to allow optimal combustion and, in the case of
cookers with glass fire doors, the maintenance of clean glass.
Picture 19 - Air regulation fire door lever: the
43
B
A
valve is open in correspondence of the
position indicated with letter A while
it is closed in correspondence of the
position indicated with letter B.