Primary Air; Secondary Air; Flue - LA NORDICA Sovrana EVO Instructions Pour L'installation, L'utilisation Et L'entretien

SOVRANA EVO - SOVRANA EASY EVO
The cooker is equipped with controls of primary and secondary air by which it is adjusted the combustion air.
1A – PRIMARY AIR CONTROL
With this air register
, it is adjusted the passage of primary air into the low part of the cooker, through the drawer of ash and the grate
in the fuel direction. The primary air is necessary for the combustion process. The ash drawer must be regularly emptied, so that the ash
does not obstruct the primary air entry for the combustion. Through the primary air the fire is also kept alive. When the knob is completely
extracted, the register is closed, when the bar is totally inserted, the register is open.
During wood combustion, the register of primary air must be opened only for a while, because otherwise the wood burns too fast and the
cooker may overheat.
2A – SECONDARY AIR CONTROL
air register
This must be open (turned completely to the right), in particular for the combustion of wood (see Table). The secondary air
heats up and triggers the dual combustion, keeping the glass clean at the same time (register open).
B – FLUE GAS Control (Picture 6 at page
(Conversion of the cooker function to the cooker, bake oven and heating function).
The smokes control, in the style of a chromed pull push lever, can be found on the top right corner of the front side of the cooker, between
the protection bar and the oven door. This control has two settings: HOB COOKING when the bar is pushed to the back of the cooker, the
combustion gases flow around the oven and directly into the flue and up to the chimney. OVEN COOKING when the control bar is pulled
out, the combustion gases flow around the oven, heating it.
To ignite the flame follow the instructions below (see Cap. IGNITION) :
• Bring the flue gas control to the cooker position (any butterfly valve placed on the flue gas exhaust pipe must also be opened).
• Open the Primary and Secondary air control.
• After having started the fire with small pieces of wood and waited until it is well lit.
• Bring the flue gas control to the oven position.
• Close any butterfly valve placed on the flue gas exhaust pipe must also be opened.
The control regulation during the ignition phase is the following :
SOVRANA EVO
Sovrana EASY EVO
The control regulation necessary in order to obtain nominal calorific output is the following (see Cap. TECHNICAL DATA):
SOVRANA EVO
Sovrana EASY EVO

6. FLUE

Essential requirements for correct appliance operation:
• the internal section must preferably be circular;
• the appliance must be thermally insulated and impermeable and built with suitable materials which are resistant to heat, combustion
products and any condensation;
• there must be no narrowing and vertical passages with deviations must not be greater than 45°;
• if already used, it must be clean;
• the technical data from the instruction manual must be respected;
If the flues are of a square or rectangular section, the internal edges must be rounded with a radius of not less than 20 mm.
For the rectangular section, the maximum ratio between the sides must be ≤ 1.5.
A section which is too small causes a reduction in draught. A minimum height of 4 m is advisable.
The following materials are FORBIDDEN and compromise the good operation of the appliance: asbestos cement, galvanised steel, rough
and porous internal surfaces.
The minimum section must be 4 dm
dm (for example 25x25 cm) for appliances with a diameter of more than 200 mm.
2
The draught created by your flue must be sufficient but not excessive.
A section of the flue which is too large can present a volume which is too large to heat and therefore cause operating difficulties for the
appliance; to avoid this, it is necessary to intubate the appliance for its entire height. A section which is too small causes a reduction in
draught.
7094301 - IT - EN - DE - FR
(Picture 6 at page 42)
(Picture 6 at page 42)
42)

PRIMARY air

SECONDARY air

OPEN
OPEN
PRIMARY air
CLOSED
CLOSED
Picture 1 at page 39 shows some example solutions.
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm, or 6.25
2
TERTIARY air
OPEN PRE-ADJUSTED
OPEN PRE-ADJUSTED
SECONDARY air
OPEN
OPEN
FLUE GAS control
HOB COOKING
HOB COOKING
TERTIARY air
PRE-ADJUSTED
PRE-ADJUSTED
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