Nordica SOVRANA EVO 2.0 Manual Del Usuario página 24

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
On the over part of the door there is the secondary air control. Also this register must be opened (then moved to the right), especially for
wood combustion (see chapter NORMAL OPERATION).
Through this register it is possible to adjust the power of the stove. Leaving it slightly open, according to the flue of the chimney, it is possible
to keep the glass clean.
B – FLUE GAS Control
(Picture
(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.
The control regulation necessary in order to obtain nominal calorific output is the following (see Cap. TECHNICAL DATA):
Sovrana EVO 2.0
Sovrana EASY EVO 2.0
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 2.0
Sovrana EASY EVO 2.0
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;
• all the sections of the flue gas duct must be accessible to inspection;
• inspection openings must be provided for cleaning.
• 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
Picture 1
porous internal surfaces.
For a correct installation please respect the sections/lengths of the flue shown in the technical data table. By installations
with different dimensions the flue must be suitably sized in accordance with EN13384-1.
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.
ATTENTION: as far as concern the realisation of the flue connection and flammable materials please follow the requirements
provided by UNI 10683 standard. The flue must be at a suitably distance from flammable or combustible material using
suitable insulation or an air space.
It is FORBIDDEN to pass system piping or air ducts inside the flue. It is also forbidden to create moveable or fixed openings on
the flue itself, for the connection of further different appliances (See chapter CONNECTING A FIREPLACE OR OPEN HEARTH TO THE
FLUE).
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(Picture 6)
6)
PRIMARY air
OPEN mm 75
OPEN mm 75
PRIMARY air SECONDARY air
OPEN
OPEN
shows some example solutions.
SECONDARY air
OPEN
OPEN
TERTIARY air
OPEN PRE-ADJUSTED
OPEN PRE-ADJUSTED
ENGLISH
TERTIARY air
PRE-ADJUSTED
PRE-ADJUSTED
FLUE GAS control
HOB COOKING
HOB COOKING