3 | Design Information
14 M2320121_en | Installation instructions Pellet boiler PECO
3.6 Combustion air for room air-independent operation
1 Boiler
2 Air extraction system (such as centralised dust extraction system, room ventilation)
3 Combustion air supply from outside (irrespective of ambient air)
3.6.1 Definition of terms
There is a central air connection on the back of the boiler. If appropriate supply air and
flue gas connections are installed, the boiler can be classified according to EN 15035 as
a type C
42
/ type C
82
or according to DIBt as a type FC
42x
/ type FC
52x
.
The conditions for room air-independent operation of the boiler at the installation site
must be clarified with the local authority responsible (authority, chimney sweep, ...).
Definitions as per EN 15035
Type C
4
Boiler that is connected via its combustion air supply and flue gas outlet, with a
connecting piece that may be supplied, to a shared chimney with a shaft for combustion
air supply and a shaft for flue gas outlet. The mouths of the air and flue gas chimney are
either concentric or so close to each other that similar wind conditions apply.
NOTICE!Air is supplied by an air and flue gas system!
Type C
8
A boiler that is connected via its combustion air supply and flue gas outlet, with a
connecting piece, to a wind protection device and a single or shared chimney.
NOTICE!Air supply via an air supply line that is independent from the chimney
system!
NOTICE!This design requires a wind protection device. If a protective grating is
fitted, you must ensure that the mesh size is sufficiently large to prevent a
significant loss of pressure and/or seal from dirt!
The second index "2" (C
42
/ C
82
) indicates type C boilers with a blower fan downstream of
the combustion chamber or the heat exchanger.
Definitions as per DIBt
Type FC
42x
One appliance with flue gas fan for connection to an air/flue system. The combustion air
line from the air shaft and the connecting piece to the chimney are part of the appliance.
Type FC
52x
One appliance with flue gas fan for connection to a chimney. The combustion air line from
the air shaft and the connecting piece to the chimney are part of the appliance.
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