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  • Technical details

Lignite briquettes and black coal gasification boilers

The boilers are constructed to burn lignite briquettes. On a base of gasification process with a exhaust fan (S) to suck waste gasses into the chimney.

The boiler body is produced as a weldment of 3 – 8 mm steel sheets. The boiler consists of two chambers, one placed upon the other. The upper chamber makes up the fuel container, and the lower one, combustion chamber and ash collector. Between the two chambers, a new, rotating, patent protected grate is placed. The grate ensures perfect combustion of coal, wood, or a combination thereof, as well as simple cleaning. The primary and secondary air are pre-heated to a very high temperature for achieveing high efficiency and good quality burning.

The recommended fuel are lignite briquettes. As spare fuel, logs of wood (length 330 mm), brown and black coal of a larger size (NUT1) or wooden briquettes can be used.

  • The efficiency of the boiler is 90,4 - 91,1 %

Advantages of ATMOS gasification boilers for lignite briquettes and hard coal

  • Large fuel tank – long burning time
  • High efficiency – primary and secondary air is preheated to a high temperature
  • Ecological combustion – boiler according to EN 303-5:2012 class 5, EKODESIGN 2015/1189
  • Exhaust fan – dust-free ash removal, smoke-free boiler room
  • Cooling loop against overheating – without the risk of damaging the boiler
  • Automatic shutdown of the boiler after the fuel burns out – flue gas thermostat
  • Convenient ash removal – large ceramic combustion chamber for ash
  • Small size and low weight
  • Choice of door left / right
  • High Quality


ATMOS boilers must be connected via the LADDOMAT 22 or thermoregulation valve (three-way valve controlled by an actuator in case of using electronic control ATMOS ACD 03) to achieve and 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 loop to prevent overheating. We recommend to install boilers with accumulation tanks.

Boilers regulation

Electromechanical – Power is controlled with a safety valve 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 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 contain waste gas thermostat which serves to stop the suction fan when the boiler burns down. The boilers work for 70 % without the fan on.


Boiler control panel with standard regulation

Panel composition:
Main off switch, safety thermostat, thermometer, regulator thermostat and combustion thermostat

Electro-mechanical regulation is an optimum solution for easy management of the operation of the boiler (ventilator).
The design of the panel with standard regulation is a basic design for all produced 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.


Boiler control panel with equithermal regulation ATMOS ACD 03



Technical details


Description of the boiler drawing
1. Boiler body 22.  Draught regulator – HONEYWELL FR124
2. Filling door – upper 23.  Heat-resistant fitting – front cube
3. Ashtray door – lower 24.  Fan control (boiler) thermostat
4. Exhaust fan (S) 25.  Door panel – Sibral – thin (32 mm)
5. Heat-resistant fitting – rear cube 26.  Door seal – cord 18 x 18
6. Control panel 27.  Flue gas brake (AC25S)
7. Safety thermostat 30.  Flue gas thermostat
8. Control flap 31.  Capacitor for exhaust fan – 1μF
9. Grate (segment) 32.  Cooling loop against overheating
10. Heat-resistant fitting – spherical space 33.  Primary air regulation
11. Grate pipe 34.  Secondary air regulation
12. Heat-resistant fitting – half-moon 37. Flue gas break – four-armed (AC25S)
13. Firing up valve  
14. Heat-resistant fitting – rear part of spherical space
15. Cleaning lid
16. Grate lever K – the flue-gas duct neck
17. The rod for firing up flap L – water outlet from the boiler
18. Thermometer M – water inlet to the boiler
19. Frame shield N – filling valve pipe sleeve
20.  Switch with an indicator light P – socket for the sensor of the valve controlling the cooling loop (TS 131, STS 20)


Boiler dimensions (mm)
A 1166  1185
B 658  758
C  593 675*
D  874 874
E  150/152 150/152
F  65 65
G  210 210
H  933 933
CH  212 212
I  212 212
J 6/4″ 6/4″


Specifications The boiler type
Boiler heat output kW 18 26
Boiler thermal input kW 20,3 28,8
Heating surface m2 1,6 1,9
Fuel shaft volume dm3 (l) 45 60
Filling hole dimensions mm 450 x 260 450 x 260
Prescripted chimney draft Pa/mbar 16/0,16 20/0,20
Max. working water overpressure kPa/bar 250/2,5 250/2,5
Boiler weight kg 273 297
Gas-outlet pipe diameter mm 150/152 150/152
Ingress protection of electric parts IP 20 20
Electrical power input (auxiliary) W 50 50
Electrical input in standby mode W 0 0
Ignition mode   manual
Efficiency over the entire performance range % 88,5 90,4
Boiler class 5 5
Boiler category 1
Operating mode non-condensing
Energy efficiency class   B C
Waste gas temperature at nominal output °C 165 177,3
Waste gas combustion products flow weight at nominal output kg/s 0,010 0,015
Specified fuel (preffered) lignite briquettes with calorific value 19 – 23 MJ/kg-1
Specified fuel black coal ORECH 1 with calorific value 20 – 30 MJ/kg-1
Spare fuel (firing up) dry wood with calorific value 15 – 17 MJ/kg-1, water content 12 – 20 %, size 80 – 150 mm
Maximum wood length mm 250 330
Combustion time at nominal output Hours 4 4
The volume of water in the boiler l 37 45
Boiler hydraulic loss mbar  0,17 0,18
Minimum buffer tank volume l 500 500
Connecting voltage V/Hz  230/50 230/50

*the width of the boiler after removing the side hoods is 555 mm