Product Overview & Application Area
The ATTACK SLX 55 LAMBDA Touch is a manually fed wood gasification boiler for closed hot water heating systems. With a nominal output of 55 kW and an output range of 27.5 to 55 kW, this version is intended for larger central heating systems whose heat demand has been professionally matched to the boiler output.
The 230-liter loading chamber accommodates dry, split firewood with a length of up to 750 mm. The generously sized fuel chamber allows the use of long logs and reduces the effort required for splitting and reloading the fuel.
Technology & Equipment
The LAMBDA Touch control processes boiler temperature, flue gas temperature, and residual oxygen content. Based on these measured values, it controls the induced draft fan as well as the motorized primary and secondary air dampers. The combustion air and boiler output are thus automatically adapted to the respective operating state.
Touchscreen, lambda sensor, and air actuators support controlled combustion. A tubular heat exchanger with turbulators improves heat transfer to the heating water. The integrated safety heat exchanger enables the integration of a thermal drain safety device.
Everyday Benefits
The large loading chamber and the maximum log length of 750 mm allow the use of long logs. With suitable fuel quality, nominal operation, and a correctly matched system, the approximate burn time is about four hours per load.
The automatic combustion control reduces the need for manual adjustments of the primary and secondary air. Boiler, flue gas, and buffer tank temperatures can be monitored via the touchscreen.
System Integration & Compatibility
For the ATTACK SLX 55 LAMBDA Touch, a buffer tank volume of 4,000 liters is recommended. The final sizing depends on the heating load, system hydraulics, heat draw, operating mode, and the technical requirements of the respective building.
Flow and return connections are designed as G 2 inch connections. The flue pipe connection has a diameter of 150 mm, and the required chimney draft is 23 Pa. A suitable return temperature boost must ensure a return temperature of at least 65 °C.
Technical data at a glance
| Nominal output stage |
55 kW |
| Fuel |
Dry, split firewood |
| Combustion technology |
Wood gasification boiler |
| Fuel efficiency at nominal output |
81.0% |
| Seasonal space heating energy efficiency |
79% |
| Energy efficiency class |
A+ |
| Energy efficiency index |
EEI 117 |
| Boiler class |
Class 5 |
| Maximum log length |
750 mm |
| Flue gas temperature at rated load |
180 °C |
| Required chimney draft |
23 Pa |
| Flue pipe connection |
150 mm |
| Flow and return |
G 2 inch |
| Safety heat exchanger |
Yes |
| Lambda sensor |
Yes |
| Maximum operating overpressure |
2.5 bar |
| Recommended buffer tank volume |
4,000 liters |
| Electrical connection |
230 V / 50 Hz / 10 A |
| Auxiliary power at rated output |
67 W |
| Protection class |
IP20 |
| Dimensions H × W × D |
1,472 × 703 × 1,506 mm |
| Weight |
650 kg |
Installation
Installation, hydraulic connection, chimney connection, electrical connection, initial commissioning, and safety inspection must be carried out by appropriately qualified professionals. The system requires an effective return temperature boost, a properly sized buffer tank, a safety valve, a thermal drain safety device, and a permanently secured heat dissipation.
Notes
For proper operation, dry, split firewood with a recommended moisture content of approximately 12 to 20 % must be used. Wet or unsuitable fuel can impair performance and combustion quality and promote the formation of tar and condensate.
The required boiler output, buffer tank size, system hydraulics and chimney design must be determined on a project-specific basis. The performance data do not replace a heat load calculation or professional planning.
Scope of delivery
- ATTACK SLX 55 LAMBDA Touch wood gasification boiler with integrated LAMBDA Touch control and lambda sensor