ATMOS D 21 P COM

Product detailed description

- 4-19.5 kW ecological, fully automatic pellet boiler

- ATMOS D21P COM is supplied as a complete set with stainless steel piping (boiler circuit with a 70°C thermovalve + one pump group with a 3-way valve without a servo drive) and with a ATMOS A25 pellet burner.

- the boiler is designed for perfect pellet combustion so that, depending on the customer's needs, a pellet burner is built into the left or right side of the boiler, which fully automatically draws pellets from the hopper using a screw conveyor. The fuel hopper is usually located next to the boiler or in an adjacent room and can be of any size (standard sizes are 250, 500 or 1000L). Often part of the boiler room is used as a fuel hopper, which is then sufficient for the whole heating season.
The operation of the pellet burner is fully automatic. When the burner receives a start command or when there is a need for heating, the conveyor feeds pellets into the burner nozzle and the heating element (spiral) ignites them automatically. After sufficient ignition of the pellets, the burner runs at the set output, which it maintains until the system (house) is heated. The burner then switches off and the pellets in the burner chamber burn out completely. The burner is then ready for a new start. The whole cycle repeats whenever needed again.
The boiler output and other burner functions are controlled by electronic regulation, which allows the boiler operation to be adapted to the specific conditions of the whole system. Refilling pellets, cleaning the burner's combustion chamber and removing ash is done once every 1 – 30 days, depending on the quality of the pellets and the size of the hopper.
If needed, the boilers can be equipped with an automatic ash removal system for comfortable heating with minimal maintenance.

Necessary accessories for the boiler:
screw conveyor DA - various lengths	pellet hopper - various

Frequently Asked Questions

• How to choose the correct output for a solid fuel boiler? Base your choice on the calculated heat loss of the heated building; however, with wood/coal boilers also consider that the boiler burns for several hours at essentially constant output during one load - it is therefore common practice to supplement the boiler with a buffer tank, which stores excess heat for later use instead of the boiler having to be inefficiently throttled down.
• What else do I need to install this boiler? In addition to the boiler itself, the system usually requires: a buffer (equalizing) tank of adequate volume, a circulation pump (often already with a built-in Laddomat or thermoregulatory valve to prevent low-temperature corrosion of the boiler), a safety valve, an expansion vessel, and a flue/chimney with sufficient draft corresponding to the boiler output - exact draft values can be found in the technical parameters above.
• What fuel is suitable and what is not? Use only fuel recommended by the manufacturer for the given model (usually split wood of a defined length and moisture content, or possibly brown coal briquettes or coal depending on the boiler type) - unsuitable or too moist fuel reduces efficiency, increases the formation of tar and deposits, and can damage the boiler.
• What about chimney inspection and legislation? Before putting the boiler into operation, as well as regularly during its use (usually once a year for solid fuels), an inspection/cleaning of the chimney by an authorized chimney sweep is required by law - 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 usually includes regular removal of ash and cleaning of the heating surfaces/flue gas paths from soot (interval depending on the intensity of use, usually in the order of weeks), and once a year a thorough 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 a device with an open flame, high temperatures and pressure elements, where an installation error can pose a safety risk.