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  • Automatic wood ignition
  • Technical details

DC40GS

Gasification boiler for wood

  • Rated power 40 kW

  • Boiler efficiency 88,8 %

  • Emission class nr. 5 (Ecodesign)

  • Log lenght 530 mm

Wood boilers ATMOS Generator DC15GS, DC20GS, DC25GS, DC32GS and DC40GS with a large application space lined with ceramics for optimal combustion quality. It’s a real wood gas generator.

Advantages of gasification boilers for piece wood ATMOS

  • Option to burn large pieces of wood 
  • Large space for wood – long burning time – up to 12 hours, depending on boiler type
  • High efficiency 88,8 to 91,2 % depending on the type – primary and secondary air is preheated to a high temperature
  • Ceramic loading chamber – fuel pre-drying
  • Ceramic combustion chamber
  • Ecological combustion – boiler according to EN 303-5:2012 class 5, EKODESIGN 2015/1189
  • Exhaust fan – dust-free ash removal, smokeless 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 space for ash (when burning wood, clean it 1x / week)
  • Boiler without tubesheet – easier cleaning
  • Small size and low weight
  • Possibility of choosing a door R / L (right/left) for selected types
  • Possibility of connection without accumulation tank
  • High Quality

Installation

ATMOS boilers must be connected via the LADDOMAT 22 or ESBE thermoregulation valve (three-way valve controlled by actuator in case of using electronic regulation ATMOS ACD 03/04) 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.

 

Boilers regulation

Electromechanical regulation – boiler performance is regulated by an air regulating valve controlled by a draft regulator, FR 124 type, which automatically opens or closes the air valve according to the set water outlet temperature (80 – 90 °C). In addition to performance regulation, the draft regulator helps protect the boiler against overheating. Its advantage is a quick ignition and firing up to the required output when the air valve is fully open. The boilers are equipped with a control thermostat on the instrument panel, which controls the exhaust fan according to the set water outlet temperature (80 – 85 °C) and a flue gas thermostat, which is used to shut down the boiler and turn off the exhaust fan after the fuel has burned out. In the case of connecting a boiler with accumulation tanks, the flue gas thermostat also controls the operation of the pump in the boiler circuit.

The advantage of regulation and design of ATMOS boilers is that the boilers work with a good chimney draft up to 70 % of the nominal power even without a fan.

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

Electro-mechanical regulation is an optimal 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.

 

 

Equithermal regulation ACD 04

The boilers DC25GS, DC32GS can be ordered from the factory with built-in ATMOS ACD 04  touch screen control.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

The automatic ignition of wood is used for planned ignition of the boiler, e.g. before coming home in the afternoon or before arriving at the cottage. The ignition of the fuel is very fast (approx. 5 minutes) and allows the operator to arrive “into the heat”. 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. Automatic wood ignition is intended for the DC40GS boiler.

A device for automatic wood ignition is built in between the upper and lower doors (a chamber with a heating spiral). High-quality wood pellets are used for ignition, which are used to fill the ignition chamber. The amount of pellets corresponds to the size of the shovel that is included in the delivery of the boiler.
The pellets are ignited at the set moment using an electric heating spiral (500 W).

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. Flue gas brake (DC32GS, DC40GS)
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
13. Ignition valve
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)

Technical details

 

Description of the boiler drawing
1. Boiler body 22. Draught regulator – HONEYWELL FR124
2. Filling door – upper 23. Cooling loop protecting against overheating
3. Ashtray door – lower 24. Fan control thermostat (boiler)
4. Exhaust fan (S) 25. Door panel – Sibral
5. Heat-resistant fitting – nozzle 26. Door seal – cord 18 x 18
6. Control panel 29. Capacitor for exhaust fan – 1μF
7. Safety thermostat 33. Flue gas brake (DC32GS, DC40GS)
8. Control flap 35. Waste gas thermostat
9. Heat-resistant fitting – side of the combustion chamber 36. Safety thermostat (Caution – when overheating push on)
10. Heat-resistant fitting – spherical space L + R 39. Air braker along spherical space
11. Nozzle seal 42. Primary air regulation
12. Heat-resistant fitting – half-moon 43. Secondary air regulation
13. Firing up valve
14. Heat-resistant fitting – rear part of spherical space
15. Cleaning lid K  – the flue-gas duct neck
17. Fire valve stem L  – the boiler water outlet
18. Thermometer M  – the boiler water inlet
19. Frame screen N  – filling valve pipe sleeve
20. Switch with an indicator light P  – sleeve for a sensor of the valve which regulates the cooling loop 

 

 

Boiler dimensions (mm)
  DC15GS DC20GS DC25GS DC32GS DC40GS DC50GSX DC70GSX
A 1280 1280 1280 1280 1434 1563 1686
B 670 758 959 959 959 1042 1268
C 678 678 678 678 678 678 678
D 950 950 950 950 1099 997 1086
E 150 (152) 150 (152) 150 (152) 150 (152) 150 (152) 150 (152) 180
F 69 69 69 69 69 70 58
G 185 185 185 185 185 184 184
H 1008 1008 1008 1008 1152 1287 1407
CH 256 256 256 256 256 256 256
I 256 256 256 256 256 256 256
J 6/4″ 6/4″ 6/4″ 6/4″ 2″ 2″ 2″

 

 

Specification
Boiler type
  DC15GS DC20GS DC25GS DC32GS DC40GS DC50GSX DC70GSX
Boiler heat output kW
15 20 25 32 40 49 70
Boiler thermal input kW 16,4 21,9 27,4 35,1 45,0 53,8 77,5
Heating surface m2 1,8 2,7  2,9  3,2  3,5  4,3 
Fuel shaft volume dm3 (l)
66 80 120 125 160 210 280
Filling hole dimensions mm  450 x 260  450 x 260   450 x 260   450 x 260   450 x 260   450 x 310 450 x 310 
Prescripted chimney draft Pa/mbar
16/0,16 20/0,20 23/0,23 25/0,25 25/0,25 25/0,25 26/0,26
Max. working water overpressure kPa/bar 250/2,5  250/2,5   250/2,5  250/2,5  250/2,5   250/2,5   250/2,5  
Boiler weight kg
302 343 431 436 485 538 690
Gas-outlet pipe diameter mm 150/152 150/152 150/152 150/152 150/152 150/152 180
Ingress protection of electric parts IP 20 20 20 20 20 20 20
Electrical power input (auxiliary) W 50 50 50 50 50 50 50
Electrical input in standby mode W 0 0 0 0 0 0 0
Ignition mode   manual
Efficiency over the entire performance range %
91,2 90,6 90,3 89,3 88,8 90,6 90,3
Boiler class   5 5 5 5 5 5 5
Boiler category   1
Operating mode   non-condensing
Energy efficiency class   A+ A+ A+ A+ A+ A+ A+
Waste gas temperature at nominal output °C 134 166 158 171 250 165 161
Waste gas combustion products flow weight at nominal output kg/s 0,010 0,012 0,015 0,018 0,022 0,025 0,034
Specified fuel (preffered)   Dry wood with a calorific value of 15 – 17 MJ/kg-1, water content 12 – 20 %, diameter 80 – 120 mm
Average fuel consumption for the heating season kg.h-1 4,1 5,5 6,8 8,6 10 13 18
Prescribed wood length mm
250 330 530 530 530 530 730
Combustion time at nominal output Hours 2 2 3 2 3 3 3
The volume of water in the boiler l
56 64 80 80 90 120 170
Boiler hydraulic loss mbar  0,20 0,22 0,22 0,23 0,22 0,23 0,22
Minimum buffer tank volume l 500 500 500 500 500 500 750
Connecting voltage V/Hz  230/50
Minimum return water temperature during operation   65 °C
EKODESIGN