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 – EN 303-5:2012, 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.
Electromechanical – 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).
Main switch, safety thermostat, thermometer, control thermostat and flue gas thermostat.
Electromechanical control is the optimal solution for controlling the operation of the boiler (fan) in a simple way. The design of the panel with standard regulation is the basic design for all manufactured boilers.
Equithermal regulation ACD 03
Each boiler can be equipped with a modern touch electronic control ATMOS ACD 03 for controlling the entire heating system depending on the outdoor temperature, room temperature and time. This regulation is able to control the boiler itself with a fan with many other functions.
Equithermal regulation ACD 04
The boilers DC18GD, DC25GD and DC30GD can be ordered from the factory with built-in ATMOS ACD 04 touch screen control only with with combination with Automatic wood ignition (AIW).The boilers are allready equipped with all necessary sensors.This unit is designed for comfortable control of the hot water system of the heated building. The controller contains functions for direct control of the boiler, boiler circuit, three heating circuits, domestic hot water, solar, etc.
Automatic wood ignition
Automatic wood ignition is used for the planned ignition of the boiler, eg before the arrival home in the afternoon or before arrival at the cottage. Ignition of the fuel is very fast (approx. 5 minutes) and allows the boiler operator to come “warm”. Fuel ignition can be set and scheduled to control ATMOS ACD 04 according to time (weekly program), according to the requirements of the heating system or according to the temperature in the Accumulation tank.
|Drawings of boilers with automatic wood ignition||Drawing of the ignition device|
|1.||Boiler body||19.||Intake duct – air duct||1.||Ignition spiral plate|
|2.||Stocking door (upper)||20.||Main switch||2.||Ignition spiral|
|3.||Ash-pan door (lower)||22.||Draught regulator – Honeywell FR 124||3.||Removable ignition chamber|
|4.||Exhaust fan||23.||Cooling loop protecting against overheating||4.||Screw lid (always tightened during operation)|
|5.||Heatproof shaped piece – nozzle||24.||ATMOS ACD 04 controller||5.||Removable blanking chamber|
|6.||Control panel||25.||Door filling – Sibral
small – thick for upper door
small – thin for lower door
|6.||Pellet filling scoop|
|7.||Safety thermostat||26.||Door sealing – cord 18 x 18|
|8.||Regulating flap||30.||Capacitor for exhaust fan – 1μF|
|9.||Heat proof shaped piece – for type GD
– combustion area side)
|33.||Tube heat exchanger (tubular)|
|10.||Heat proof shaped piece – for type GD
– spherical space
|35.||Pocket for thermostats (sensors)|
|11.||Sealing – nozzle – 12 x 12 (14 x 14)||36.||Locking screw|
|12.||Heatproof shaped piece – half moon||37.||Ignition device|
|14.||Heat proof shaped piece – for type GD
– rear face of spherical space
|K||flue gas duct neck|
|15.||Cleaning lid||L||water outlet from|
|16.||Frame shield||M||boiler – water inlet to|
|17.||Ignition valve pulling rod||N||boiler – filling valve|
|18.||Fuse T6,3A/1500 – type H||P||pipe sleeve – sleeve for cooling loop control valve sensor (TS 131, STS 20)
|Description of the boiler drawing|
|2.||Filling door – upper||19.||Supply air duct|
|3.||Ashtray door – lower||20.||Switch with an indicator light|
|4.||Exhaust fan (S)||22.||Draught regulator – HONEYWELL FR124|
|5.||Heat-resistant fitting – nozzle||23.||Cooling loop protecting against overheating|
|6.||Control panel||24.||Fan control thermostat (boiler)|
|7.||Safety thermostat||25.||Door panel – Sibral|
|8.||Control flap||26.||Door seal – cord 18 x 18|
|9.||Heat-resistant fitting – side part||27.||Waste gas thermostat|
|10.||Heat-resistant fitting – spherical space L + R||30.||Capacitor for exhaust fan|
|11.||Nozzle seal – 12 x 12 (14 x 14)||33.||Tube heat exchanger – tube sheet|
|12.||Heat-resistant fitting – half-moon|
|13.||Firing up valve||K||– the flue-gas duct neck|
|14.||Heat-resistant fitting – rear part of spherical space||L||– the boiler water outlet|
|15.||Cleaning lid||M||– the boiler water inlet|
|16.||Frame screen||N||– filling valve pipe sleeve|
|17.||Fire valve stem||P||– sleeve for a sensor of the valve which regulates the cooling loop|
|Boiler dimensions (mm)||Boiler type|
|Fuel shaft volume||dm3 (l)
|Filling hole dimensions||mm||450 x 260||450 x 260||450 x 260||450 x 260||450 x 260|
|Prescripted chimney draft||Pa/mbar
|Max. working water overpressure||kPa/bar||250/2,5||250/2,5||250/2,5||250/2,5||250/2,5|
|Gas-outlet pipe diameter||mm||150/152||150/152||150/152||150/152||150/152|
|Ingress protection of electric parts||IP||20||20||20||20||20|
|Efficiency over the entire performance range||%
|Energy efficiency class||A+||A+||A+||A+||A+|
|Waste gas temperature at nominal output||°C||145||127||148||175||183|
|Waste gas combustion products flow weight at nominal output||kg/s||0,014||0,017||0,017||0,021||0,025|
|Specified fuel (preffered)||Dry wood with a calorific value of 15 – 18 MJ/kg-1, water content 12 – 20 %, diameter 80 – 120 mm|
|Average fuel consumption for the heating season||kg.h-1||5,1||6,1||7,7||10||13|
|Combustion time at nominal output||Hours||2||2||2||2||2|
|The volume of water in the boiler||l
|Boiler hydraulic loss||mbar||0,22||0,22||0,22||0,23||0,24|
|Minimum volume of accumulation tank||l||1045||1375||1639||2200||2695|
|Regulation temperature settings||°C||from 75 to 95|
|Minimum return water temperature during operation||°C||65|
|All boilers in DOKOGEN line are only intendet for connection with an ACCUMULATION TANKS of sufficient capacity with a minimum of 55 litres per 1 kW of instaled boiler output.|