Wood gasification boilers - DOKOGEN
Ecological wood gasification boilers
Generator Dokogen boilers are characterized with a special chamber which is on both sides laid with special ceramic shaped parts, with primary air inlets in the lower section and with ceramic nozzle and in lower chamber with spherical ceramic parts. Rear flue duct is equipped with a tubular heat exchanger.
Gasification of wood (inverse burning) with subsequent combustion of wood gas in ceramic combustion chamber ensures optimum burning of all combustible components. The air supply and combustion process are controlled with exhaust fan. This allows quick ignition and good combustion of the boiler since the firing up. The flame temperature is 1000 - 1250 ° C.
Inverse burning (gasification) and ceramic combustion chamber enable practically complete combustion with a minimum of harmful exhalations. The boilers meet limits of European regulations for environmental friendly product and belong to 5th class of boiler standard ČSN EN 303-5. Meet the most demanding requirements of the EU - ECODESIGN 2015/1189.
Advantages of wood gasification boilers ATMOS
- Option to burn large pieces of wood
- Large fuel container - long time of burning
- Tube heat exchanger
- High efficiency over 90 % - primary and secondary air is preheated to a high temperature
- Ecological burning - boiler class 5 - ČSN EN 303-5, ECODESIGN 2015/1189
- Exhaust fan - ash cleaning without dust, boiler room without smoke
- Cooling loop protecting against overheating – without risk of boiler damage
- Exhaust fan automatically switches off when the fuel burns out – exhaust (flue gas) thermostat
- Comfortable ash removing – large space for ash (when burning wood you have to clean it once per week)
- Small size and low weight
- High quality
ATMOS boilers must be connected via the LADDOMAT 22 or thermoregulatory valve (three-way valve controlled with actuator) to achieve keeping the minimum temperature of water returning to boiler at 65 °C. The temperature of water exiting the boiler must be permanently kept between 80 - 90 °C.
The default configuration of all boilers includes a cooling circuit to prevent overheating. We recommend installing boilers with accumulation tanks.
MODEL OF DCxxGD BOILERS ARE ONLY INTENDET FOR CONNECTION WITH ACCUMULATION TANKS OF SUFFICIENT CAPACITY WITH A MINIMUM OF 55 LITRES PER 1 kW OF INSTALLED BOILER OUTPUT.
Regulation of the boilers
Electrical - mechanical - output of the boiler is controlled with a regulating air flap operated with the draught regulator, FR 124 type, which automatically opens or closes the safety valve according to a set output temperature of water (80 - 90°C). When setting the power regulator, much attention should be paid because the regulator has another important function other than power regulation - it also secures the boiler against overheating. A controlling thermostat located on the boiler panel regulates the exhaust fan according to a set temperature (80 - 85°C). A temperature lower by 5°C should be set on the controlling thermostat rather than on the FR 124 draught regulator.
Boilers are also equipped with the waste gas thermostat which serves to switch off the exhaust fan after the wood burns out.
The boiler runs at a reduced output even without a fan - heating is not lost when the electric power fails. At up to 70 % of its rated output, the boiler can be operated without a ventilator (for boilers DCxxGD we do not recommend operation when an exhaust fan is switched off).
Each boiler can be fitted with Equithermal regulation ATMOS ACD 01 for control of the heating system depending on the outdoor temperature, room temperature and time. This regulation is able to control boiler with a fan and many other features.
|2.||Filling door (upper)||19.||Intake duct - air duct|
|3.||Ash-pan door (lower)||20.||Main switch|
|4.||Exhaust fan (S)||22.||Draught regulator - Honeywell FR 124|
|5.||Heatproof shaped piece - nozzle||23.||Cooling loop protecting against overheating|
|6.||Control panel||24.||Ventilator control thermostat (boiler)|
|7.||Safety thermostat||25.||Door filling - Sibral|
|8.||Regulating flap||26.||Door sealing – cord 18 x 18|
|9.||Heat proof shaped piece – for type GD - combustion area side||27.||Flue gas thermostat|
|10.||Heat proof shaped piece – for type GD - spherical space||30.||Capacitor of exhaust fan|
|11.||Sealing – nozzle - 12 x 12 (14 x 14)||33.||Tube heat exchanger|
|12.||Heatproof shaped piece – half moon|
|13.||Ignition valve||K||flue gas duct neck|
|14.||Heat proof shaped piece – for type GD - rear face of spherical space||L||water outlet from the boiler|
|15.||Cleaning lid||M||water inlet to the boiler|
|16.||Frame shield||N||filling valve|
|17.||Ignition valve pulling rod||P||pipe sleeve – sleeve for cooling loop control valve sensor|
|Specified chimney draught||Pa||16||18||20||22||24|
|Boiler water volume||l||73||105||105||112||128|
|Fuel chamber volume||dm3||85||125||125||170||170|
|Maximum wood length||mm||330||530||530||530||530|
|Flue gas temperature at nominal output||°C||145||132||155||175||183|
|Specified fuel (preffered)||
Dry wood with heating capacity 15 - 17 MJ.kg1,
|Min. return water temperature||°C||65|
|Energy efficiency class||A+||A+||A+||A+||A+|