Flue - LA NORDICA ROSA Manuel Utilisateur

The heating of the environment is made by irradiation: through the panoramic glass and the external hot surfaces of the cookers,
the heat is radiated into the environment.
The cooker is equipped with controls of primary and secondary air by which it is adjusted the combustion air.
1A - PRIMARY Air Register
With the lower register, the passage of primary air in the lower part of the cooker is regulated through the ash drawer and the grill
in the direction of the fuel. The primary air is necessary for the combustion process. The ash drawer must be emptied regularly, so
that the ash cannot block the primary air intake for combustion. The primary air also keeps the flame alive.
The primary air register must be almost completely closed during wood combustion, as otherwise the wood burns too quickly and
the thermo-product may overheat.
2A - SECONDARY Air Register
This register must be open (i.e. turned completely to the right), in particular for the combustion of wood (see Table).
The register regulation necessary in order to obtain nominal calorific output is the following (see Cap. TECHNICAL DATA):
ROSA
Rosetta BII
Rosetta Sinistra BII
B - FLUE GAS Control (Picture
(Conversion from the cooker HOTPLATE USE – OVEN USE function to the cooker HEATING function)
On the right of the front of the stove/cooker, between the protection rail and the oven door, is the FLUE GAS control lever,
recognisable as a bronze knob. When the lever is pushed towards the back of the stove/cooker, the combustion gases flow above
the oven directly towards the exhaust stub (cooker function – PLATE USE); when the lever is pulled towards you, the combustion
gases flow all around the oven, so the internal temperature increases evenly (cooker – oven cooking and heating – OVEN USE).
To ignite the flame follow the instructions below (see Cap. IGNITION) :
• Open the FLUE GAS Register (cooker function – PLATE USE) to aid flue gas exhaust. Position the register (any butterfly valve
placed on the flue gas exhaust pipe must also be opened).
• Open the primary air register (placed on the ash tray).
• After having started the fire with small pieces of wood and waited until it is well lit.
• Bring the flue gas register to the oven position.
• Close the any butterfly valve placed on the flue gas exhaust pipe must also be opened.
The control regulation during the ignition phase is the following :
ROSA -- Rosetta BII - Rosetta Sinistra BII
How to set the machine to BOIL WATER
• Keep the flue gas register on the cooker function – HOTPLATE USE.
• Primary air half open.
• Secondary air completely open.
• Load wood as described in the manual (hourly load).
How to set the machine to COOK BISCUITS
• Switch the cooker on with a moderate load of wood until the oven thermometer indicates 150 °C.
• Wait for 190 – 200 °C to be reached without additional wood being loaded.
• Load a single piece of wood weighing 500 - 600 g one at a time and wait for it to burn completely before adding another.
• This keeps the oven temperature stable around 190 – 200 °C.
• Place the tray of biscuits in the low position for 25-30 minutes (slow cooking) or in the medium position for 15-20 minutes (quick
cooking).
• Turn the tray halfway through cooking, if necessary.

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
or 6.25 dm (for example 25x25 cm) for appliances with a diameter of more than 200 mm.
2
(Picture 6).
(Picture 6).
PRIMARY air
1/3 OPEN
CLOSED
3 mm OPEN
6)
PRIMARY air
Picture 1
shows some example solutions.
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm,
2
SECONDARY air
OPEN
OPEN
OPEN
SECONDARY air
OPEN
ENgLIsH
TERTIARY air
PRE-ADJUSTED
PRE-ADJUSTED
FLUE GAS Control
OPEN Cooker function
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