Cola HELENA Manuel D'installation, D'utilisation Et D'entretien page 32

1.3 Technical description
HELENA – MINI HELENA model stoves burn solid fuel and are suitable for cooking food on the cast iron hotplate
and in the oven, and for home heating.
Both stoves have the same combustion chamber, with a nominal output of 8.73 kW, and ensure a maximum
heatable volume of approx. 250 m3 considering an energy requirement coefficient equal to 35 W/m3; this can vary
depending on the insulation, type of building and climatic zone.
The stove is tested with wood fuel complying with the requirements of Standard EN 12815 and is classified as an
intermittent combustion appliance.
The firebox is entirely in refractory tiles, which allows clean combustion with low emissions, and is closed frontally
by a cast iron door with ceramic glass for aesthetic purposes and control.
The layouts of the stoves are given in the enclosures, i.e. 7.1 mod.HELENA – HELENA RUSTIC, 7.2 mod.HELENA
DELUX and 7.3 mod. MINI HELENA – MINI HELENA RUSTIC; the following sections refer to the points in the
above-mentioned layouts.
1.3.1 Fire door (A)
The fire door is opened by pulling the handle outwards; use the protective glove supplied with the stove when the
handle is hot. Thin slots around the top and bottom edges of the fire door glass provide an airwash to keep the
glass clean.
1.3.2 Ash door (B)
The ash door is opened by pulling the handle outwards, to access a compartment with the removable ash pan
inside.
1.3.3 Primary air flow control (C)
The rotary control on the ash door regulates the primary air flow into the lower part of the stove through the ash pan
and grate. The primary air is necessary for the combustion process, therefore make sure to empty the ash pan
regularly so that the ash cannot obstruct the combustion air inlet. When the arrow is in position ' 0 ' the air inlet is
closed; when the arrow is in position 3 the air inlet is fully open ( figure 6.1).
Higher air settings may cause overheating and consequent damage to the stove.
1.3.4 Baffle inspection door (D)
This door gives access to the closure plate and the baffles located under the oven for cleaning.
1.3.5 Oven (E)
The oven is heated by the flow of combustion gases around it and its temperature can be read on the thermometer
on the door glass. A sufficient draught and clean fume ducts are essential for optimum efficiency. The oven has two
racks. When putting pans into the oven, allow for possible rising of the product inside and ensure a space of at
least 20 mm between the pan and the sides of the oven.
1.3.6 Secondary air (F)
The stove's secondary air inlet located on the back is for burning unburnt gases produced by the combustion
process.
1.3.7 Cast iron hotplate (G)
The cast iron hotplate has concentric rings of max. diameter 320 mm in the fire zone and a rectangular plate for
possible insertion of a tank for containing water. The rings can be removed using the poker, to inspect the firebox
or for inserting cauldrons.
1.3.8 Oven bypass control lever (H)
When the lever located to the left of the flue connector is in position Z, the flue gases are forced to circulate around
the oven, thereby raising the oven temperature uniformly. When the lever is in position A, the combustion gases
flow over the oven and under the cast iron hotplate directly towards the outlet collar.
" "
Position A is advisable when lighting the stove and during summer operation.
Position "Z" must be used for oven cooking.
1.4 Permissible and non-permissible fuels
Permissible fuels are natural-type pieces of dry and resin-free wood (beech, oak and birch), 20-25 cm long. The
wood should be seasoned at least two years; the maximum recommended moisture content is 20%, in order to
ensure combustion without smoke and soot.
HELENA – HELENA RUSTIC – HELENA DE LUX – MINI HELENA – MINIHELENA RUSTIC
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