ATMOS DC 50 S

Product detailed description

The ATMOS DC50S is a robust wood-fired boiler engineered for long-term, stable operation in commercial and industrial heating applications. It is typically installed in larger buildings such as workshops, agricultural facilities, or multi-room residential structures where continuous heat generation is required. The boiler integrates into closed-loop water-based heating systems and can operate with radiators, underfloor heating, or buffer tanks. Installers should ensure proper chimney draft and flue gas routing to maintain combustion efficiency.

As a gasification boiler, the DC50S relies on staged combustion and secondary air injection to maximise fuel utilisation. This design reduces emissions while extending burn times between refuels. The system is suited for areas with ready access to seasoned firewood meeting the required specifications. Operators benefit from reduced ash removal frequency and minimal system downtime during routine maintenance.

Technical parameters

Water volume	89 L
Boiler weight	433 kg
Maximum wood length	730 mm
Minimum return water temperature	65 °C
Fuel chamber capacity	180 dm³
Prescribed fuel	Dry wood with calorific value 15 – 18 MJ/kg, diameter 80 – 150 mm and moisture 12 -20 %
Required chimney draft	25 Pa
Energy efficiency class	A+
Combustion class	4
Power	49,9 kW efficiency 87,7%
Code	DC50S
Brand	Atmos

These parameters guide system sizing and component selection. The 89 L water content supports thermal inertia, helping stabilise output during load fluctuations. The 180 dm³ fuel chamber allows extended burn periods, reducing operational effort. The minimum return water temperature ensures safe operation and prevents condensation within the boiler casing.

Installation and connection

Begin by verifying the chimney draft meets the specified 25 Pa requirement using a manometer. The boiler connects to the heating circuit via standard threaded ports; confirm flange or pipe dimensions match the existing system layout. Ensure the exhaust flue is correctly aligned with the chimney outlet and sealed to avoid leakage. Check the fuel chamber door mechanism and air control valves for smooth operation before commissioning. Avoid overloading the boiler beyond its rated capacity to prevent premature wear.

Compatibility and accessories

The DC50S is compatible with standard steel or cast iron radiators, buffer tanks, and circulator pumps. An external chimney with a certified 25 Pa draft is essential for optimal performance. Additional components such as a room thermostat or programmable controller can enhance user convenience but are not included. Installers should also consider a separate fuel storage area due to the large fuel chamber size.

Technical background for designers

The DC50S operates via generator gasification, where primary combustion produces volatile gases that are then burned in a secondary chamber. The boiler body is constructed from thick-walled steel plates (3–8 mm) for durability. Keramic refractory bricks line the combustion chamber, providing insulation and promoting complete fuel combustion. The cooling circuit prevents overheating of internal components, ensuring long-term reliability. System integration requires careful balancing of flow rates and return temperatures to maintain efficiency.

Service and operation

Periodic checks include inspecting the exhaust system for blockages, cleaning the fuel feed opening, and verifying the operation of the exhaust fan. The large combustion chamber allows ash removal once per week under normal conditions. Monitor the exhaust temperature regularly to detect potential inefficiencies early. Replace damaged refractory bricks or worn-out gaskets immediately to avoid performance degradation.

Frequently asked questions

Can the DC50S be integrated into an existing heating system?
Yes, provided the system meets the minimum return water temperature of 65°C and the chimney provides the required 25 Pa draft.

Is the exhaust fan adjustable?
The fan is factory-set and not user-adjustable, ensuring consistent draft levels throughout the combustion cycle.

How is the fuel loaded into the boiler?
Dry wood pieces up to 730 mm in length are inserted directly through the loading hatch. Fuel should have a moisture content of 12–20% for optimal performance.

What happens if the boiler overheats?
The built-in cooling loop activates to dissipate excess heat. In extreme cases, the safety thermostat will shut down the unit to prevent damage.