Flue; Primary Air; Secondary Air - Nordica ROSA Gebrauchsanweisung

ROSA - ROSETTA BII
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).
B - FLUE GAS Register (Picture 6 at page 42
(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 smoke-register 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.
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.
The control regulation during the ignition phase is the following :
ROSA -- ROSETTA BII
The register regulation necessary in order to obtain nominal calorific output is the following (see Cap. TECHNICAL DATA):
ROSA
ROSETTA BII

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.
The flue must be at a suitably distance from flammable or combustible material using suitable insulation or an air space.
1095080 - IT - EN - DE - FR
(Picture 6 at page 42).
)

PRIMARY air

Fuel
WOOD
WOOD
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

SECONDARY air

OPEN OPEN
PRIMARY air
CLOSED
2/3 OPEN
SMOKES control
Cooker function
SECONDARY air
OPEN
20 mm OPEN
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