resistant glass. The glass not only increases the aesthetic impression of the view of the flames, but
also enables the transfer of heat for longer distance by heat emission. This creates unique thermal
comfort even if you are sitting several meters away from the stove. The glass also prevents sparks
from falling from the burning wood and smoke from escaping to the room. The top sheet metal
surface above the combustion chamber can be used to keep food and drinks warm. Each stove is
equipped with a separate inlet for primary and secondary combustion air (further referred to as
primary and secondary air).
For this purpose, the stove is always equipped with a control element for primary air. Primary air is
lead directly to the burning fuel (usualy through the ashpan and the grate) and serves for primary
combustion reaction. Some types are also fitted with secondary air closing (see the dimensioned
sketch), which makes it possible to subdue the burning process and thus lower the heat output of
the stove, but it will also lower heat efficiency and increase the volume of toxic components in the
flue gases. As secondary air aids the combustion of residual inflammable gases in the flue gases
and prevents the glass from blackening, it should be open constantly during operation. Secondary
air is lead mainly to the combustion space above the burning fuel and also participates in primary
combustion if the primary air inlet is half or fully closed. The size of the secondary openings is
adjusted for the rated output of appliances under the given operating conditions (see the technical
data table) if the primary air inlet is closed. Leave the primary inlet fully open during firing up when
the chimney draught is low. After the chimney is warmed up, the primary inlet can be closed or
half closed. Lower stove output can also be achieved by inserting smaller amount of fuel or by
mounting a chimney smoke flap (manual closing in the smoke flue duct reducing the flue to max.
75%). The secondary damper is designed for full closing of the stove when it is not in operation. It
prevents imponderable room ventilation when the stove is not operating and protects the room
from chimney smell under bad chimney draught conditions.
3. Installation instructions
3.1 General
The appliance must be installed on floors with corresponding bearing capacity; if the existing
arrangement does not conform to this necessary requirement, appropriate measures must be taken
(e.g. using a bearing plate for load distribution). Adequate access for cleaning the appliance, the
flue gas duct and the chimney must be ensured.
3.2 Chimney connection
A suitable chimney (minimum cross section, chimney draught, tightness, etc.) is crucial for good
stove functioning. Consult the chimneyer prior to installing the stove. Chimney specifications can
be found in the attached technical data table. The best efficiency will be achieved by combustion
with the door closed and with the chimney draught about 10 Pa (Pascal). If the chimney draught is
bigger than 15 Pa, we recommend to reduce it by half closing the secondary air inlet. If this air is
not regulated, an additional flue flap should be mounted. 10 Pa chimney draught with min. 177
cm2(Φ15cm) chimney flue cross section at usual atmospheric pressure can be achieved if the
effective height of the chimney is c. 5 m (measured from the shrunk ring to the orifice). The
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