Viadrus Prometheus Fratto 51 Installations-, Bedienungs- Und Wartungsanleitung Seite 23

the appliance by 800 mm in the direction of the heat radiation and by 400 mm in other
directions.
Do not put any articles made of flammable materials (see the table below) on the
appliance and within the distances smaller than the safe distance. In case you do not know
the combustibility grade follow the distance defined for grade C
Tab. no. 2 Combustibility grade of building materials according to EN 13501-1
and EN 13501-2 -
Combustibility grade of
building materials and
products
A - non-flammable
B - flammable with difficulties
C – hardly flammable
1
C - moderately flammable
2
C - easily flammable
3
The fireplace insert must be installed in such a way that the expansion of the insert is
guaranteed (we recommend 5 mm). The walls adjacent to the fireplace insert must be non-
flammable. The shell of the hot air chamber must be made of the non-flammable materials
and must be heat-insulated on the internal side. The insulation and used structural
elements must be made of materials that do not release the detrimental products owing to
higher temperatures.
The hot-air chamber must be ventilated through a not fully closable opening with a
grate and the upper edge of the hot-air chamber opening must be situated at least 450 mm
under the ceiling. The hot-air chamber must be accessible in order to check and clean the
flue gas ducting.
The regulation grates of the combustion air, vent air and heating air must be
positioned in such a way that they cannot get clogged.
Before the fireplace insert putting in operation the flue-gas way must be inspected and
tested before closing the flue-gas way with the shell of the hot-air chamber. Only a
qualified person e.g. a chimney sweeper's company can carry out these activities. The
inspection result must be recorded in the flue-gas way revision report.
The fireplace inserts installation is very demanding therefore we recommend that only
the specialised and duly trained building companies or chimney sweeper's and stove-
fitter's companies are entrusted with this installation.
building materials and products included
in the do combustibility grade (extract of
the standard)
granite, sandstone, concretes, ceramic tiles,
fire protection plasters, ...
Heraklite, basalt slabs, slabs made of glass
fibres, ...
Beech wood, plywood, hardened paper,
formica ...
redwood, larch wood, whitewood rubber
floorings...
Bitumen felt, polystyrene, polyethylene, PVC,
...
Direction vertical
to the side-hung
23
.
3
Minimum distance (mm)
Other directions
wall
-
800
800
800
1600
-
400
400
400
800