ATMOS DC 30 SPX

Product detailed description

The Atmos DC30SPX is a three-chamber wood and pellet boiler designed for use in heating systems where flexibility in fuel choice is required. It allows for manual wood combustion and fully automatic pellet burning using a separate burner. This makes it ideal for large residential properties, small commercial buildings and industrial facilities that require a reliable heat source with minimal operator intervention. The boiler integrates easily into existing central heating systems and is compatible with standard chimney configurations due to a single flue outlet. Installers will find it particularly useful in applications where fuel availability varies seasonally, allowing seamless switching between wood and pellets without system modifications.

The modular design supports installation scenarios ranging from standalone heating solutions to integration with thermal storage tanks. Its compact footprint and efficient combustion system make it suitable for both new builds and retrofits where space is limited. The boiler’s generator gasification technology ensures clean and efficient operation while maintaining compliance with environmental standards. This makes it a preferred option for installers seeking a high-performance solution with low emissions and long-term reliability.

Technical parameters

The boiler’s parameters define its performance and suitability for specific applications. The 30 kW wood-burning output and 6–20 kW pellet range allow for precise adjustment based on the building’s heating demand. The 530 mm maximum wood length accommodates standard firewood sizes, while the 100 dm³ wood loading capacity reduces the frequency of reloading. The required chimney draft of 23 Pa ensures proper flue gas removal and stable operation. These figures help determine the correct boiler size, fuel storage requirements and chimney specifications during system planning.

Installation and connection

Installation begins with verifying the site conditions, including sufficient floor space and access to the chimney. The boiler connects via a standard flue outlet, eliminating the need for multiple chimneys. The water jacket separating the combustion chambers minimises cross-contamination and ensures consistent performance regardless of the active fuel. Installers should ensure the chimney provides the specified draft and that the flue pipe is correctly sized and insulated.

When connecting the boiler to the heating circuit, it is important to align the flow and return ports with the system’s piping layout. The boiler can be integrated with thermal storage tanks using the included temperature sensors (TV and TS) for automatic burner control. A common mistake during installation is neglecting to test the draft after assembly, which can lead to incomplete combustion and reduced efficiency. Always verify the flue gas path for obstructions and ensure all connections are sealed properly to prevent leaks.

Compatibility and accessories

The Atmos DC30SPX is compatible with a wide range of central heating systems, including those with thermal storage tanks and underfloor heating. The boiler can operate independently or be paired with additional equipment such as a pellet hopper and auger conveyor (DA series) to enhance automation. The burner A25 with servo drive is a required accessory for pellet operation and should be sourced separately. Installers should also consider the pellet storage tank size based on the intended burn duration and fuel consumption rate. Additional components like a control panel or remote monitoring system can be added later if needed.

Technical background for designers

The boiler utilises a three-chamber system, with the top two chambers dedicated to wood gasification and the lower chamber accommodating the pellet burner. This design isolates the combustion processes, preventing interference and ensuring optimal efficiency for each fuel type. The ceramic lining in the pellet chamber enhances heat retention and reduces wear. The water jacket surrounding the combustion chambers acts as a thermal barrier, maintaining stable temperatures and reducing energy loss through conduction.

The boiler integrates seamlessly with thermal storage systems thanks to the included temperature sensors, which enable automated burner activation based on tank conditions. Designers should account for the boiler’s total weight (537 kg) when planning the foundation and support structure. The internal water volume of 109 L contributes to thermal inertia, helping maintain steady heat output even during periods of fluctuating demand. For maximum efficiency, the system should be balanced to match the boiler’s output range and the building’s insulation levels.

Service and operation

Regular maintenance includes cleaning the combustion chambers and inspecting the flue system for soot buildup. The automatic air intake regulation via a servo motor requires periodic testing to ensure smooth operation. The boiler’s self-start function for the pellet burner after wood combustion is activated by the AGF2 exhaust gas sensor and KTF20 boiler temperature sensor. These components should be checked annually for accuracy and responsiveness.

Operators should monitor the wood feed tray regularly to prevent overloading and ensure even distribution. The boiler is supplied without a burner, which means the installation team must confirm the presence of the required accessories before commissioning. Any malfunction in the automatic functions should be addressed immediately to avoid damage to the combustion system. Routine checks of the water jacket and internal seals help extend the boiler’s service life and maintain peak efficiency over time.

Frequently asked questions

Can the boiler be operated with a thermal storage tank?
Yes, it is compatible with thermal storage tanks using the included temperature sensors TV and TS for automatic burner control.

Is the boiler available without the pellet burner?
Yes, the boiler is delivered without the burner, allowing customers to choose or reuse an existing unit.

What fuel types are supported by the boiler?
It supports dry wood with moisture content of 12–20% and high-quality wood pellets with a diameter of 6–8 mm.

Can the boiler be integrated with an existing central heating system?
Yes, it can be connected to most central heating systems provided the flow and return ports match the system’s layout.