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  • Boilers D14P, D21P, D25P
  • Boilers D14P Compact, D21P Compact, D25P Compact
  • Boilers D20P, D30P, D40P, D50P
  • Boiler D85P
  • The Pellet burners

D85P

Automatic pellet boiler

  • Rated power 80 kW

  • Boiler efficiency 91,6 %

  • Emission class nr. 5 (Ecodesign)

D10PX, D15PX, D20PX and D20PX boilers meets 5th emission class (Energy efficiency class A+), Ekodesign.

Boiler output and other burner functions are controlled by electronic regulation, which allows the boiler operation to be adapted to the specific conditions of the entire system. We refill the pellets, clean the combustion chamber of the burner and remove the ash, once every 1 – 30 days, depending on the quality of the pellets and the size of the hopper. If necessary, the boilers can be equipped with an automatic ash removal system for comfortable heating with minimal maintenance.

Thanks to these features, these boilers are just as comfortable in terms of operation and utility properties as gas heating. The main advantage, however, is that, unlike natural gas, they burn renewable energy sources.

Advantages of ATMOS pellet boilers

  • Great heating comfort
  • High efficiency 90.2 to 92.4 % depending on type – low fuel consumption
  • Ecological combustion – boiler according to EN 303-5:2012 class 5 and EKODESIGN 2015/1189
  • Automatic operation and shutdown of the boiler after the fuel burns out
  • Automatic ash removal – with built-in ash removal

Pellet heating

Most of us already have some experience in using with wood or wood briquettes, either in boilers or fireplaces. These fuels are available in most places at more or less decent prices. A novelty, that not everyone knows, are the so-called pellets, which are produced in a similar way as wood briquettes, by pressing from waste wood (dry sawdust and shavings) without any binder under high pressure. We consider quality pellets to be pellets made only of soft wood without bark, so-called white pellets, which will guarantee us trouble-free and reliable boiler operation. Today, however, there are manufacturers who add biological binders to pellets for greater strength, especially for pneumatic transport. These pellets can be burned, but it is necessary to take into account the greater ash content and non-burning.

Pellets can be produced by the same way from hard wood or wood with bark so called dark pellets but these can cake in the burning chamber and can cause troubles. It is possible to burn these pellets in our burners, but it is necessary to clean the combustion chamber of the burner once a day. When burning quality pellets without binders and bark, we clean the combustion chamber of the burner once every 7 and 30 days. Similar or even greater problems occur when burning straw pellets and various biological wastes, such as poppy seeds, sugar beet pulp, grain waste, etc. These pellets contain high amounts of chlorine and nitrogen, thus sharply shortening the life of the boiler body, ceramics and chimney. Therefore, we cannot recommend burning them. The most common size of quality wood pellets today is a diameter of 6 and 8 mm and a length of 10 to 25 mm. The calorific value of pellets is approximately from 17 to 19 MJ/kg-1 depending on the type of fuel. Today, the price of quality pellets ranges from producers, of which there are already many in the Czech Republic from 5,000 to 7,000 CZK per tonne.

So far, pellets in the Czech Republic are most often delivered in plastic bags of 15 kg each, or in bales of 1000 kg. Abroad, but now also in the Czech Republic, the pellets are transported by means of tanks from which you can refuel in any tank. However, it is necessary to follow several principles that prevent their crushing during pneumatic transport. Above all, it is necessary to prevent them from falling directly on the hard wall of the container, but on the curtain, which is suspended in the middle of the container from the ceiling. This will ensure even filling of the hopper and prevent them from being crushed into small pellets and dust. However, it is important that the pellets are stored in a dry place so that they do not disintegrate.

 

Boilers D14P, D21P, D25P

 

Description of the boiler drawing D14P, D21P, D25P
1. Boiler body 16. Main switch
2. Cleaning door 17. Control (boiler) thermostat
3. Ashtray 18. Pump thermostat
4. Control panel 19. Safety thermostat
5. Frame shield 20. Fuse T6,3A/1500 – H type
6. Door filling – Sibral 21. Double switch for automatic ash removal and pellet burner
7. Door seal – cord 18 x 18 mm 23. Front cover
8. Closure 24. Pellet burner ATMOS A25
9. Decorative nut    
10. Burner hole cover – plate + insulation
11. Flue cleaning cover K – the flue-gas duct neck
12. Tubesheet air decelerator L – water outlet from the boiler
13. Stainless steel heating screen M – water inlet to the boiler
14. Blanking plug for built-in automatic ash removal N – filling valve pipe sleeve
15. Thermometer P – socket for the sensor of the valve controlling the cooling loop (TS 131, STS 20)

 

Boiler dimensions (mm)
D14P D21P D25P
A 1207 1207 1207
B 880 880 950
C1 620 620 620
C2 1027 1027 1027
D 801 801 801
E 150/152 150/152 150/152
G 215 215 215
H 934 934 934
CH 211 211 211
I 211 211 211
J 6/4″ 6/4″ 6/4″

 

Specification
Boiler type
D14P D21P D25P
Rated power kW 4 – 14 4 – 19 7 – 24
Heating surface m2 1,7 1,7 2
Fuel shaft volume dm3 (l) 88 88 88
Feeding hole dimensions mm 270 x 450 270 x 450 270 x 450
Prescripted chimney draft Pa 16 18 22
Max. working overpressure of water kPa 250 250 250
Boiler weight kg 231 231 254
Gas-outlet pipe diameter mm 150/152 150/152 150/152
Ingress protection of electric parts IP 20 20 20
Electric input – at startup W 522 522 522
Electric input – during operation W 42 42 42
Efficiency over the entire performance range % 90,3 90,3 90,2
Flue gas temperature at rated power °C 127 147 151
Waste gas combustion products flow weight at nominal output kg/s 0,011 0,015 0,018
Specified fuel (preffered) quality pellets with a diameter of 6 – 8 mm with a calorific value of 16 – 19 MJ.kg-1
Average fuel (pellets) consumption at nominal output kg.h-1 3,5 4,5 5,4
The volume of water in the boiler l 56 56 62
Boiler hydraulic loss mbar 0,18 0,18 0,19
Minimum buffer tank volume l 500 500 500
Connecting voltage V/Hz 230/50 230/50 230/50
Boiler class 5 5 5
Energy efficiency class A+ A+ A+
Ekodesign

 

Boilers D14P Compact, D21P Compact, D25P Compact

 

Description for D14P Compact, D21P Compact, D25P Compact boiler drawing
1.  Boiler body 17.  Control (boiler) thermostat(code: S0068)
2. Cleaning door 18.  Pump thermostat (code: S0023)
3. Ash pan
for D14P, D14P/130, D21P (code: P0097)
for D25P – (code: P0080)
19.  Safety thermostat (code: S0068)
4.  Control panel 20.  Fuse T6,3A/1500 – typ H
5. Frame shield 21.  Double switch of automatic deashing and the pellet burner (code: S0098)
6. Door filling – Sibral – large (code: S0263) 22.  Elektroventil pneumatického čištění hořáku
7. Door seal – cord 18 x 18 mm (code: S0240) 23. Front cover (door) (code: S1252)
8.  Closure (code: S1047) 24. ATMOS A25 pellet burner
9.  Decorative nut (code: S0413)
10.  Lid of the burner opening – plate + insulation (code: S0275)
11.  Cleaning lid of the smoke channel – flue gas orifice (150/152 mm)
12.  Tube plate decelerator – water outlet from the boiler (1”)
13.  Stainless-steel screen of the combustion chamber
for D14P, D14P/130, (P14)  (code: S0936)
for D21P, D25P (P21, P25)  (code: S0937)
– water inlet to the boiler (1”)
14.  Blind flange for installation of automatic deashing – socket for the filling tap (1/2”)
15.  Thermometer – expansion tank sleeve (1”)
16.  Main switch (code: S0091) – water outlet from boiler for boiler circuit (1”)

Boiler dimensions (mm)
D14P D14P /130 D21P D25P
A / A1 1207 / 1635 1207 / 1635 1207 / 1635 1207 / 1635
B1 850 850 850 950
B2 / B3 1095 / 1300 1095 / 1300 1095 / 1300 1195 / 1300
C1 / C2 620 / 1027 620 / 1027 620 / 1027 620 / 1027
E 150/152 130 150/152 150/152
G / G1 207 / 266 207 / 266 207 / 266 207 / 266
H 947 947 947 947
CH 220 220 220 220
I 220 220 220 220
J 1” 1” 1” 1”
P 70 70 70 70
Q 1” 1” 1” 1”

Boilers D20P, D30P, D40P, D50P

 

Description of the boiler drawing D20p, D30P, D40P, D50P
1. Boiler body 19. Air decelerator(type D20P – 3x brush, D30P, D40P a D50P – 1x brush + 2x steel)
2. Filling door 20. Cleaning lid of the rear drain
3. Ashtray 21. Thermometer
4. Control panel 22. Main switch
5. Regulating air damper – only for wood heating 23. Control (boiler) thermostat
6. Heat-resistant fitting – bottom of the combustion chamber 24. Pump thermostat
7. Heat-resistant fitting – upper spherical space 25. Safety thermostat
8. Frame screen 26. Fuse T6,3A/1500 – H type
9. Exhaust fan 27. Condenser for exhaust fan – 1μF
10. Draught regulator – HONEYWELL FR124 28. Grate 
11. Door filling – Sibral 29. Double switch for automatic ash removal and pellet burner
12. Door seal – cord 18 x 18 mm 30. Grate pipe
13. Closure – handle 31. Pellet burner
14. Heat-resistant fitting – rear part of spherical space K – the flue-gas duct neck
15. Ashtray cap – nut L – water outlet from the boiler
16. Cooling loop against overheating M – water inlet to the boiler
17. Burner hole cover N – filling valve pipe sleeve
18. Tube cover cleaning lid P – socket for the sensor of the valve controlling the cooling loop (TS 131, STS 20)

 

Boiler dimensions (mm)
D20P D30P D40P D50P
A 1405 1405 1405 1405
B 652 954 954 1052
C 606 606 606 606
D 848 848 848 848
E 150/152 150/152 150/152 150/152
G 211 211 211 211
H 1163 1163 1163 1163
CH 202 202 202 202
I
J 6/4″ 6/4″ 6/4″ 6/4″

 

Specification Boiler type
D20P D30P D40P D50P
Rated power kW 6,5 – 22 8,9 – 29,8 8,9 – 40 13,5 – 45
Heating surface m2 2 2,7 2,7 3,6
Fuel shaft volume (reservoir) dm3 (l) 70 105 105 140
Feeding hole dimensions mm 270 x 450 270 x 450 270 x 450 270 x 450
Prescripted chimney draft Pa 15 21 22 23
Max. working overpressure of water kPa 250 250 250 250
Boiler weight kg 305 370 386 430
Gas-outlet pipe diameter mm 150/152 150/152 150/152 150/152
Ingress protection of electric parts IP 20 20 20 20
Electric input – at startup W 572 530 530 530
Electric input – during operation W 92 97 97 97
Efficiency over the entire performance range % 91,1 92,4 91,0 91,1
Boiler class 5 5 5 5
Energy efficiency class A+ A+ A+ A+
Flue gas temperature at rated power °C 128 158 157 123
Waste gas combustion products flow weight at nominal output kg/s 0,016 0,025 0,031 0,035
Specified fuel (preffered) quality pellets with a diameter of 6 – 8 mm with a calorific value of 16 – 19 MJ.kg-1
Average fuel (pellets) consumption at nominal output kg.h-1 5 6,8 9,4 10,6
The volume of water in the boiler l 82 91 91 117
Boiler hydraulic loss mbar 0,22 0,23 0,23 0,24
Minimum buffer tank volume l 500 750 750 1000
Connecting voltage V/Hz 230/50 230/50 230/50 230/50
Ekodesign

Boiler D85P

ATMOS D85P hot water boilers are designed for comfortable heating of residential houses, various establishments and other similar objects with pellets. High-quality wood pellets with a diameter of 6 to 8 mm can be used for heating. The boiler is not designed for burning wood, sawdust and small wood waste.

The boilers are designed so that an ATMOS A85 pellet burner with pneumatic cleaning of the combustion chamber of the burner and the tube heat exchanger is built into their left or right side. The boiler body is made as a weldment from steel sheets with a thickness of 3 – 6 mm. They consist of a combustion chamber with a large vault and in the lower part of the chamber there is a slit to the channel with a screw conveyor discharging the ash to a large external tank (160 l) of automatic ash removal. The front wall of the boiler is equipped with a cleaning door in the upper part, behind which a stainless steel screen with a window is inserted, ensuring the protection of the door against overheating. In the rear part of the boiler there is a tube heat exchanger equipped with segment brakes with the function of automatic cleaning without the need to remove them. The boiler body is thermally insulated from the outside with mineral wool inserted under the sheet metal covers of the outer casing of the boilers. In the upper part of the boilers there is a panel with a main switch, automatic ash removal switch, pellet burner switch (L2), operating (regulating) thermostat, pump thermostat, safety thermostat, thermometer and 6.3 A fuse. The boiler is not equipped with a cooling loop against overheating. , because due to the small amount of fuel in the burner there is no danger of overheating the boiler in the event of a power failure. energy. The D85P boiler is equipped with an exhaust fan with a speed sensor.

Description of the boiler drawing D85P
1. Boiler body 18. Exhaust fan condenser – 2 μF
2. Filling door 19. Thermometer
3. Ashtray 20. Main switch
4. Control panel 21. Control (boiler) thermostat
5. Door screen 22. Pump thermostat
6. Combustion chamber shield 23. Safety thermostat
7. Burner ATMOS A85 24. Fuse T6,3A/1500 – H type
8. Pneumatic tubesheet cleaning 25. Double switch for automatic ash removal and pellet burner
9. Frame screen 26. Air decelerator for tubesheet
10. Fan with speed sensor – exhaust 27. Air inlet for pneumatic cleaning of the tubesheet
11. Door filling – Sibral 28. Valve for pneumatic burner cleaning
12. Door seal 18 x 18 mm
13. Closure – handle
14. Decorative nut K  – flue gas neck
15. Burner hole cover – plate + insulation L  – water outlet from the boiler
16. Engine with gearbox for ash removal M  – water inlet to the boiler
17. Automatic ash removal screw N  – socket for the filling tap

 

Boiler dimensions (mm) D85P
A  1840
B1  1303
B2  2113
C1  938
C2  1589
1204
200
288
H 545
CH  350
2”

 

Specification
D85P
Rated power kW 24 – 80
Heating surface m2 6,5
Fuel shaft volume dm3 (l) 492
Feeding hole dimensions mm 260 x 450
Prescripted chimney draft Pa/mbar 22/0,22
Max. working overpressure of water kPa/bar 250/2,5
Boiler weight kg 774
Gas-outlet pipe diameter mm 200
Ingress protection of the electric part IP 20
Electric input – at startup
– during operation 
W 635 (1135)
134
Efficiency over the entire performance range % 91,6
Boiler class 5
Energy efficiency class A+
Flue gas temperature at rated power °C 149,2
Waste gas combustion products flow weight at nominal output kg/s 0,062
Specified fuel (preffered) quality pellets with a diameter of 6 – 8 mm with a calorific value of 16 – 19 MJ.kg-1
Average fuel (pellets) consumption at nominal output kg.h-1 18,8
The volume of water in the boiler l 230
Boiler hydraulic loss mbar 0,24
Minimum buffer tank volume l 1000
Connecting voltage V/Hz 230/50
The prescribed minimum return water temperature in operation is 65 °C. The prescribed operating temperature of the boiler is 80 – 90 °C.

 

 

 

The Pellet burners

Pellet burner ATMOS A25 for boilers D10PX, D15PX, D20PX and D25PX

Specified fuel: good quality pellets with 6 – 8 mm diameter, 5 – 25 mm lenght and 16 – 19 MJ.kg-1 caloric power (white pellets).

The burner screen: used to display the current status of the burner and adjusting its functions.

Burner control: with an AC07X electronic control unit that controls the operation of the external conveyor, two ignition spirals and the fan in accordance with requirements of the boiler and the heating system. The electronic system is rotected with the safety thermostat of the boiler, safety thermostat at the pellet supply to the burner, the fan speed transducer and the flame sensing photocell. The operation of the burner is indicated on the electronic control display.
Burner in version for boilers DxxPX contains moreover additional module AC07X-C – (R5, R6) to controle pneumatic cleaning system for pellet burner or other possible aplications.

Ignition of fuel: automatic assisted by two electric ignition spirals (one ignition spiral 522W).

Basic functions of burner:
Spare outputs R and R2 for control of exhaust fan of the boiler and pump in the boiler circuit (connected from the production)
The possibility of using two spare outputs R5 and R6 for various applications
The possibility of the involvement of four different sensors TS, TV, TK and TSV
TK – boiler temperature sensor (connected from the production)
TSV – flue gas temperature sensor (connected from the production)
TS – temperature sensor on the tank bottom
TV – temperature sensor on the tank top

  • control of boiler fan from burner with the help of the spare output (R- reserve) (connected from the production) (except D10PX)
  • control of boiler pump from burner with the help of the spare output (R2- reserve) (connected from the production)
  • burner controlling it in accordance with two temperatures (sensors) on the buffer (accumulation) tank

Fuel feeding: for boilers DxxPX is designed special auger conveyor DRA25 which is inbuilded directly inf the boiler. This conveyor is controlled from electronic regulation of burner and dose the fuel from the reservoir in to the burner.

 

Pellet burner ATMOS A45 for boilers D30P, D40P, D50

Prescribed fuel: quality wood pellets (white) with a diameter of 6 to 8 mm, a length of 5 to 25 mm and a calorific value of 16 – 19 MJ.kg-1.

Burner display: used to display the current status of the burner and to set its functions

Burner control: electronic control AC07X, which controls the operation of the external conveyor, two ignition coils and the fan according to the requirements of the boiler and the heating system. The electronics are protected by a boiler safety thermostat, a safety thermostat on the pellet supply to the burner, a fan speed sensor and a photocell for flame sensing. The burner operation is signaled on the electronic control display.

Fuel ignition: automatic by means of two electric ignition coils.

Basic burner functions:

Reserve outputs R and R2 for controlling the boiler exhaust fan and the pump in the boiler circuit (connected from the factory)
Possibility of connecting four different sensors TS, TV, TK and TSV
TK – boiler temperature sensor (connected from production)
TSV – flue gas temperature sensor (connected from production)
TS – low temperature sensor on the tank
TV – top temperature sensor on the tank

  • control of the boiler fan from the burner by means of a reserve output (R) (connected from the factory)
  • control of the boiler pump from the burner by means of a reserve output (R2) (connected from the factory)
  • burner control according to two temperatures on the expansion tank

Fuel dosing: special DRA type screw conveyors are designed for DxxP boilers.

Pellet burner ATMOS A85

The A85 burner is basically equipped with a pneumatic cleaning system, which cleans the combustion chamber of the burner every time it burns out or at regular intervals. Thanks to pneumatic cleaning, it is sufficient to check or clean the combustion chamber of the burner once every 14 days to a month.

We always connect the D80P boiler with the A85 burner with a buffer tank with a minimum volume of 1000 l, where we use the function of controlling the burner according to two temperatures on the buffer tank and controlling the boiler exhaust fan directly from the burner.

The following conveyors are designed for these burners:
Shaft screw conveyor for burner ATMOS A45 / 85 – DRA50 with a length of 1.7 m and a diameter of 80 mm
Shaft screw conveyor for burner ATMOS A45 / 85 – DRA50 with a length of 2.5 m and a diameter of 80 mm
Shaft screw conveyor for burner ATMOS A45 / 85 – DRA50 with a length of 4 m – straight and a diameter of 80 mm
Shaft screw conveyor for burner ATMOS A45 / 85 – DRA50 with a length of 5 m – straight and a diameter of 80 mm