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2.2 . combustion air supply from the installation room
Austroflamm inserts obtain its combustion air only via the air connection collar at the bottom of the device.
Therefore a structurally well functioning air supply into the combustion chamber must be ensured. For this
purpose it is absolutely necessary to have the correct dimensioning of the convection air outlets and the
necessary diameter of the combustion air inlets. The correct positioning of the mentioned in-/outlets into the
fireplace is of major importance. A disregarding of the above may lead to a lack of combustion air during
operation. In order to achieve a sufficient combustion air supply, we recommend to affix a closed conduct of air
supply between the connection collar and the air inlet.
The external air flap collar of the models 80x64 and 97x74 is situated at left or right side of the carcass; all other
models mentioned in this manual have the collar exiting at the bottom of the insert.
Important!
The connection collar should always be connected as described above,
as the sufficient air supply into the combustion chamber may
otherwise not be ensured.
2.3. combustion air supply with direct conduct
The combustion air supply can also be set via a direct conduct from the outside to the insert. For this purpose the
combustion air duct must be channelled from the external connection of the house directly to the fireplace.
Please see the professional literature installation rules of the stove fitting trade to determine the diameter of the
air conduct (see fig. 4.1 minimum diameters). In general this type of installation is recommended.
2.4. combustion air conduct
Combustion air pipes must be made of non-inflammable, stable materials, their connection must be air-tight and
the whole piping must be accessible for inspection and cleaning. The formation of condensate caused by a
temperature fall below dew point shall be avoided by installing suitable insulation.
According to the regional building regulations, combustion air pipes, which are to be installed in buildings with
more than two full floors and combustion air pipes which are bridging firewalls, must be installed in such a
manner, that fire and smoke cannot spread into other floors or fire compartments (see federal building
regulations).
2.5. chimney requirements
The chimney must be inspected in terms of size and quality according to the existing local regulations
before
positioning and installation of the Austroflamm insert (see applicable federal building regulations, fire prevention act
as well as
DIN 18160, part 1).
A calculated proof of the sufficient function of the chimney according to DIN EN 13384 must be brought forth.
The calculation must consider, that an essentially larger quantity of air can be exhausted safely if the door is
open (reloading of fuel). The proper function of the insert depends on the connection to the correct chimney.
Take care that all apertures leading to the same chimney, e.g. chimney cleaning flaps, are closed.
Multiple allocation:
All Austroflamm inserts described in this mounting instruction are also certified and approved according to DIN EN
13229 with self-closing door (construction type A 1). Fireplaces, which will be operated with self-closing doors only,
maybe connected to a multiply allocated chimney (if a multiple allocation is possible). The calculation has to be
made according to DIN EN 13384 part 2.
2.6. connection pieces/flue pipe
The flue pipes are to be rated according to DIN EN 13384.
The flue pipes between the insert and the heat exchanger, as well as the piping into the chimney, must be made of
steel, with a minimum wall thickness of 2 mm. Pipes made of austenitic or stainless steel only need a wall thickness
of 1 mm. The flue pipe connection must be made directly into the chimney.
The flue pipes within the fireplace casing must be encased with minimum 3 cm stable and non-inflammable
insulation material, category A1 according to DIN 4102, as described in the section insulation. This is not applicable
for flue pipes which are meant for heating up the convection air and if a fire hazard can be ruled out.
