Pellet kettle Defro Alfa with control APC center and room thermostat ST-292
Product data sheet
Manufacturer Information
Name: DEFRO R. Dziubela sp. komandytowa
Address: 26-067 Strawczyn, Ruda Strawczyńska 103A, PL
Email: biuro@defrogarden.pl
Website: https://www.defro.pl
European Manufacturer: Yes
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Pellet kettle Defro Alfa with control APC center and room thermostat ST-292
| Nationwide Commissioning and Assembly about customer service upon request possible! Delivery is by truck and lifting platform to the curb! |
ALFA II – pellet boiler with central pellet burner, first-class equipment for maximum heat and operating comfort
Features of the Alfa II
- The Defro Alfa II has a compact boiler design with optional expansion of the pellet container volume (PLUS version).
- Standard with automatic heat exchanger cleaning and ash removal.
- Central pellet burner for efficient fuel combustion. Automatic burner cleaning ensures reliable boiler operation.
- TSS Twin Spark System – two alternately activated ignition elements.
- Ceramic baffles above the combustion chamber. Vertical tube heat exchangers with swirlers for maximum energy yield.
- Vacuum sensor to ensure the necessary negative pressure in the combustion chamber.
- Powerful induced draft fan for the necessary negative pressure in the boiler and stabilization of combustion.
- Intuitive and very simple operation of the boiler thanks to the modern APC Center control system with touchscreen, which controls 6 pumps and two heating circuit mixers and is equipped with a factory-installed internet module.
- A professional boiler connection package including return flow booster and boiler circuit pump is included in delivery.
- Level sensor in the pellet container to indicate the fuel reserve and to interrupt operation so that the conveyor screw does not run empty.
- A lambda sensor can be retrofitted as an option, making combustion even more efficient and environmentally friendly.
- APC Center control system with touchscreen, which operates 6 pumps and 2 heating circuit mixers,
- standard with built-in internet module
- Touchscreen APC CENTER, control APC CENTER,
- Internet module,
- PID function,
- Weather-dependent heating circuit control,
- TSS automatic ignition,
- Pellet burner of the automatic Cleaning,
- Hydraulic set with return flow booster and boiler circuit pump,
- Adjustable feet
- GSM module,
- Module I-1,
- Module I-1M,
- Lambda sensor with module ST-69,
- Internet module WIFI,
- Room thermostat ST-292 v3,
- Room thermostat ST-292 v2,
- Room thermostat DEFRO SPK Lux,
- Wireless room thermostat SPK LUX,
- Set for wireless RS communication, version PLUS – enlarged container
Technical data of the Defro Alfa II
| Parameters/Boiler type | Unit | 12 | 17 |
|---|---|---|---|
| fuel | - | Wood pellets with a diameter of 6 mm | Wood pellets with a diameter of 6 mm |
| Rated power | kW | 12 | 17 |
| Performance range | kW | 3.2-12.2 | 4.9-17.1 |
| Efficiency - full load | m2 | 90.7 | 90.7 |
| Efficiency - Partial load | kg | 91.2 | 91.2 |
| Energy efficiency class | - | A+ | A+ |
| Pellet hopper capacity (Standard/PLUS)1 | kg | ~85/ | ~85/ |
| ~145 | ~145 | ||
| Max. permissible operating pressure | bear | 3 | 3 |
| Required chimney draft | Pa | 8 | 10 |
| Exhaust gas temperature | °C | 106 | 119 |
| Exhaust gas mass flow | g/s | 9 | 13 |
| CO2 content | % | 10.7 | 11.2 |
| Boiler weight2 (STD/PLUS) | kg | 357/372 | 373/390 |
| Cross-section of the chimney | cm x cm | 14x14 | 16x16 |
| 1 The specification is based on a bulk density of wood pellets of 0.65 kg/m3. | |||
| 2 The boiler weight depends on its optional equipment. | |||
| The boiler height can be adjusted using the supplied adjustable feet. | |||
| The adjustable feet have an adjustment range of 38 to 50 mm. |
Pellet heating is a better alternative in many existing houses
Heating with pellets or a heat pump?
The choice between a pellet boiler and a heat pump depends on various factors, including individual needs, local conditions, and economic considerations. The budget for a new heating system in an old building is often insufficient for a heat pump, as the investment involves several follow-up investments. If radiators need to be replaced, the house needs to be insulated, or perhaps a PV system needs to be installed for the heat pump to operate efficiently, the costs increase negligibly and may not be profitable in many existing homes in the long run. Pellet boilers can be integrated more easily and cost-effectively into an existing heating system, keeping the initial cost moderate. Our modern boilers are highly efficient and provide consistent heat distribution regardless of outside temperatures. It is advisable to speak to one of our sales advisors to determine the best option for your home.
A pellet boiler works similarly to a gas or oil boiler, but uses wood pellets as fuel.
The pellets are fed into the burner via a screw conveyor, where they are burned to generate heat. This heat is then passed through a heat exchanger, which heats the water in the heating system. The heated water is then piped to the radiators or underfloor heating systems in the house to heat the rooms. An electronic control system ensures that sufficient fuel is delivered to the burner and that the combustion air supply is automatically regulated to maximize efficiency.
- Environmental friendliness: Wood pellets are a renewable fuel and have a low carbon footprint compared to fossil fuels such as oil or gas.
- Efficiency: a pellet boiler is very efficient and can convert up to 95% of the fuel into heat.
- Cost savings: Wood pellets are generally cheaper than oil or gas, so you can save money in the long run with our pellet boilers.
- Convenience: Pellet boilers operate automatically and some models are fully automatic and require little intervention.
Pellet boiler and environmentally friendly heating!
From an "environmentally friendly heating" perspective, pellet and wood heating systems remain an excellent choice. Wood releases as much carbon dioxide when burned as it absorbs during growth. It is therefore considered a climate-neutral fuel. Wood is a continuously renewable and therefore sustainable resource. Our wood and pellet boilers were therefore designed in accordance with current emissions guidelines and meet the strict provisions of the current Federal Immission Control Ordinance (BImSchV).