4 Product information
4.9 Combustion principle
Fuel path
The pellets are sucked by the suction turbine
1
into the
pellet storage tank
2
. The pellet auger
5
and rotary
valve
4
transport the pellets to the filling chamber,
where they fall onto the combustion grate
6
. The pel-
lets are burned using the pellet dropping method. The
ash produced during combustion is transported by the
ash extraction auger
7
to the ash box
8
.
Airflow
The air required for combustion is sucked into the fil-
ling chamber through the primary air damper, down-
wards through the combustion grate into the
combustion chamber, on through the heat exchanger,
and leaves the boiler via the induced draught fan into
the flue gas pipe.
4.10 Efficient and low-emission operation
Please note the following recommendations from the
EU Energy Efficiency Directive:
Use of a buffer tank
As the most complete combustion of wood pellets is
possible only when the boiler is in normal operation
and as greater losses and higher emissions occur
during the warm-up and burn-out phases, the use of a
buffer tank is recommended.
This tank stores the water heated by the boiler, allo-
wing the connected devices (e.g. heating circuit, DHW
tank, fresh water module, etc.) to access it as requi-
red. This ensures sufficiently long, uninterrupted com-
bustion periods for the boiler.
Use of high-efficiency heating pumps
When using external heating pumps (e.g. return tem-
perature rise, heating circuit pumps, etc.), high-effi-
ciency pumps with energy efficiency class A should
preferably be used.
This delivers savings potential of up to 80 % in drive
energy (compared to conventional heating pumps) with
identical feed results.
8
Operation manual
pellettop
