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

Boilers D14P, D21P, D25P

Boilers D14P Compact, D21P Compact, D25P Compact

Boilers D20P, D30P, D40P, D50P

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.

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