Burner ATMOS A 85 with pneumatic cleaning

Product detailed description

- for pellets, for boiler D85P, output 24–80 kW

- suitable for good-quality white softwood pellets without bark, 6 - 8 mm in diameter, 10 - 25 mm in length, with a calorific value of 16 - 19 MJ/kg. The advantage of the burner is automatic fuel ignition using a glow-plug coil, which ignites the pellets whenever heating is needed. The burner and boiler thus operate at full output with the highest efficiency of 85 to 90% and the best combustion quality. This is unlike many competing products, which have no ignition device and must always maintain a bed of embers in the combustion chamber.

Operation at such low output, where the flue gas temperature drops below 100°C, causes condensation of tars and acids in the combustion chamber and chimney. This causes lower efficiency, higher fuel consumption, worse combustion quality, greater fouling of the boiler and more frequent cleaning. The ATMOS A 85 burner is fitted as standard with pneumatic cleaning, which cleans the combustion chamber after every burn-out or at regular intervals. Thanks to pneumatic cleaning, it is enough to check the burner only once every 14 – 30 days. The burners are not intended for dark pellets.

The ATMOS A 85 burner has the same control method as the A 25 and A 45 burners, so for these boilers we can use the function of controlling the burner according to temperatures in the buffer tank or in the solar storage tank. This is made possible by a set of 4 temperature sensors. The D80P boiler with the A85 burner is always connected together with a buffer tank of at least 1000 l, where we use the function of controlling the burner according to two temperatures on the buffer tank, and control of the boiler's induced-draught fan directly from the burner.

The burner's electronic unit makes it possible to control burner operation using four sensors, so that if the sensor on the solar panel detects that it is advantageous to heat the buffer tank with energy from the solar collector, it ensures that the burner control only charges the tank with pellet energy up to the level of sensor TK (TS2), which is located in the tank between sensors TS and TV.

The burner operates as follows. When the burner receives a start command, or when a need for heating arises, the conveyor feeds pellets into the burner nozzle, which are ignited automatically by the glow-plug coil. Once the pellets are sufficiently ignited, the burner ramps up to the set output, at which it remains until the system is heated. The burner then switches off and the pellets in the burner chamber burn out. The whole cycle repeats whenever needed again. The boiler's output and other burner functions are controlled by the burner's electronic control, which allows the boiler's operation to be adapted to the specific conditions of the whole system.

The burner allows a large number of individual settings described in the operating instructions.

Frequently Asked Questions

• How do I choose the right output for a solid fuel boiler? Base your choice on the calculated heat loss of the heated building; for wood/coal boilers also bear in mind that the boiler burns for several hours at essentially constant output on a single load - it is therefore common practice to add a buffer (accumulation) tank, which stores the surplus heat for later use instead of forcing the boiler to run inefficiently at a reduced output.
• What else do I need to install this boiler? Besides the boiler itself, the system usually requires: a suitably sized buffer (accumulation) tank, a circulation pump (often already fitted with a Laddomat or thermoregulating valve to protect the boiler against low-temperature corrosion), a safety valve, an expansion vessel, and a flue/chimney with sufficient draught matching the boiler's output - exact draught values can be found in the technical parameters above.
• What fuel is suitable, and what isn't? Use only fuel recommended by the manufacturer for the given model (typically split firewood of a defined length and moisture content, or lignite briquettes or coal depending on the boiler type) - unsuitable or overly damp fuel reduces efficiency, increases tar and deposit build-up, and can damage the boiler.
• What about chimney inspection and legislation? Before the boiler is put into operation, and regularly during its use (typically once a year for solid fuels), a chimney inspection/cleaning by an authorised chimney sweep is legally required - without the relevant inspection certificate, an insurance claim in the event of a fire may also be disputed.
• How much maintenance does the boiler require? This typically includes regular removal of ash and cleaning of the heating surfaces/flue gas paths of soot (interval depending on intensity of use, usually a matter of weeks), plus a thorough annual inspection including seals and the chimney.
• Can I install the boiler myself? The actual placement and connection of the boiler to the heating system, chimney and safety elements should be carried out, or at least professionally checked, by a heating technician - this is an appliance with an open flame, high temperatures and pressurised parts, where a wiring/connection error can be a safety risk.