ATMOS D 25 PX

Product detailed description

- 4.5-24 kW compact ecological automatic pellet boiler

ATMOS DP25PX is supplied as a complete unit with a built-in conveyor, a pellet hopper with a volume of 215 L
and a ATMOS A25 pellet burner

Its compact design allows installation in small boiler rooms.

The boiler is designed for electronically controlled pellet combustion with automatic fuel ignition. The pellet burner is built into the front part of the boiler in the door of the lower combustion chamber. This chamber is lined with ceramic elements for ideal flame burnout with high efficiency and also serves as an ash storage space. The rear part of the boiler houses a tube heat exchanger fitted with segmented turbulators with a coarse (operational) cleaning function without the need to remove them.
The boiler body is made as a welded construction of steel plates 3–5 mm thick. It is thermally insulated on the outside with mineral felt and Sibral insulation, placed under the sheet metal covers of the boiler's outer casing.
The fuel hopper is located in the upper part, from which pellets are transported to the burner by means of a screw conveyor. Fuel dosing is fully automatically controlled. The front part of the boiler has a panel with a main switch, a pellet burner switch for cleaning purposes, an operating thermostat, a safety thermostat, a thermometer and a 6.3 A fuse.
The D25 PX boiler is equipped with an exhaust fan.
The boiler is not equipped with a cooling loop against overheating, because thanks to the small amount of fuel in the burner, there is no risk of the boiler overheating in the event of a power failure.

Frequently Asked Questions

• How to choose the right power output for a solid fuel boiler? Base your choice on the calculated heat loss of the heated building, but for wood/coal boilers also consider that the boiler burns for several hours at essentially constant output during one filling - 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 for installing this boiler? In addition to the boiler itself, the system usually requires: a buffer (balancing) tank of appropriate volume, a circulation pump (often already with a built-in Laddomat or thermoregulatory valve against low-temperature corrosion of the boiler), a safety valve, an expansion vessel and a flue/chimney with sufficient draft corresponding to the boiler's 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 lignite briquettes or coal depending on the type of boiler) - unsuitable or excessively moist fuel reduces efficiency, increases the formation of tar and deposits, and can cause damage to 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), a chimney inspection/cleaning by an authorized 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 usually includes regular ash removal and cleaning of heating surfaces/flue gas paths from soot (interval depends on 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 error in connection can be a safety risk.