2 Safety information
Execution of the flue gas pipe
–
Run the flue gas pipe towards the chimney in
a short and rising direction, with as few chan-
ges of direction as possible.
–
Change direction in the form of aerodynamically
favourable arcs, do not build kinks.
–
The diameter of the flue gas pipe to the chimney
may be enlarged if required, but may not be redu-
ced.
–
Place the inlet of the flue gas pipe in the chimney
just below the ceiling.
–
The flue gas pipe must be tight. Seal seal-less
flue gas pipes on site with heat-resistant silicone.
Insulate flue gas pipe
–
Insulate the flue gas pipe continuously from the
boiler to the chimney.
–
Recommended insulation thickness: 50 mm rock-
wool.
–
Serves to prevent temperature loss and prevents
the consequential formation of condensation.
Cleaning opening in the flue gas pipe
–
To clean the flue gas pipe (e.g. removal of accu-
mulated flue ash) there must be an easily acces-
sible cleaning opening.
–
Recommendation: Coordinate the number and
placement of the cleaning openings with the chim-
ney sweep.
Opening for emissions measurement in the flue
gas pipe
Make an opening (hole) in the flue gas pipe to per-
form the prescribed emission measurement
Minimum draught requirement for boiler: 5 Pa
A draught stabiliser must be fitted if the specified
draught of 15 Pa is exceeded.
Recommended chimney diameter
Install explosion flap
Abb. 2-1: Explosion flap integrated into draught stabiliser
i
Before longer horizontal pipe sections
(L>20xD) and at the high point before drop-
ping down the flue gas pipe, an explosion flap
must be installed, independent of the boiler
output.
In the case of boiler output <50 kW, no explosion flap
is required (in the case of a short and rising flue gas
pipe to the chimney).
3.5 Supply air in the installation room
For Austria (according to standard H 5170):
–
For the supply air, 2 cm² per kW thermal output of
the fuel, but allow at least 200 cm² free cross-sec-
tion. (Fuel heat capacity = boiler capacity / effi-
ciency)
–
For the exhaust air, allow at least 180 cm² free
cross-section up to 100 kW nominal heat and an
additional 1 cm² free cross-section for every fur-
ther kW.
i
Calculate at least a further 20% for wire mesh
in the aeration cross-section.
For Germany In accordance with the Model Firing
Ordinance:
–
For heating appliances with a nominal output of
up to 35 kW, a combustion air opening of at least
150 cm² or 2 x 75 cm² routed directly into the open
air must be provided.
–
Alternatively, a door/window leading outside and
a room content of at least 4 m³/kW nominal heat
output are suitable. If the Aufstellraum does not
abut onto an outside wall, combustion air supply
via connecting rooms is possible. Here, the com-
bustion air is supplied via a sufficiently dimen-
sioned adjacent room which abuts onto an
outside wall.
–
From 35 to 50 kW, provide a free aeration cross-
section
of
at
least
150
cm².
From
50
kW
upwards,
for
aeration
and
ventilation,
provide
a
minimum
free
cross-section
of
150
c
m²
for
each,
plus
2
cm²
per
KW
in
excess
of
50
kW.
i
Calculate at least a further 20% for wire mesh
in the aeration cross-section.
Installation manual
pelletelegance
7
