Pellet Boilers

Kolte D15P a D20P
D15P, D20P

Ecological and fully automatic pellet boilers ATMOS

Boilers are designed in such a way that the burner is built into the left or right side of the boiler, functioning as a heat exchanger, which draws pellets from the storage tank by means of a screw conveyor. The fuel tank is located next to the boiler or in an adjacent room and can be of any arbitrary size (the standard size is 250 or 500 l). A part of the boiler room can be used for storing pellets before conveying into burner.

The burner itself operates as follows. If the burner is triggered (the need to heat arises), the conveyor gets pellets into the burners spout and ignites them using a glowing coil. Following sufficient pellet combustion, the burner is adjusted to the set output where it remains until the system is heated. Thereafter, the burner is switched off and pellets in the burners chamber are burnt out. The whole cycle is repeated again when heating is required. .

The boiler output and other burner functions are controlled electronically, which enables an adaptation of the boiler operation to specific system conditions. Addition of fuel, cleaning of the burner combustion chamber and removal of ash is performed once every 1 - 14 days, depending on the quality of pellets. You can add to the boiler automatic ash remover which assures even more comfortable operating.

A great advantage of our wood pellet boilers D15P, D20P, D30P and D45P is the fact that removing the burner from the boiler and replacing it with a lid allows emergency wood burning. These features mean that these boilers offer the same degree of operating comfort and utility value as do boilers running on gas, propane-butane or LFOs. The main advantage is that in comparison with natural gas or LTO,these boilers combust renewable energy sources which makes their prospects look very good.

Kolte D14P a D21P
D14P, D21P, D25 P

Advantages of pellet boilers ATMOS

  • High comfort of heating
  • high efficiency 90%-93% depending on type of pellets – low consumption of fuel
  • Ecological burning – boilers in CSN EN 303- 5 in class 3
  • ossibility to get a grant from the government
  • Automatic operation
  • automatic ash removing – in case of installing with ash remover

Pellets

Most of you already have some experience in using wood or wooden briquettes for heating either in boilers or fireplaces. These fuels are widely available at reasonably good prices. A new product, not yet known by all, is the so-called pellets, which are produced in a similar way as wooden briquettes by high-pressure pressing of waste wood (dry sawdust and chips) without any binder. Only pellets made of soft bark-less wood, i.e. "white pellets" which ensure trouble free and reliable operation of the boiler are considered quality pellets. At present, however, some producers add biological binding agents in order to increase solidity of the pellets for pneumatic transport. These pellets can be burned, but the amount of ash and poorly burned butts increases.

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 problems. Burners produced by our company can burn these pellets, but the firing chamber must be cleaned at least once per day. When burning high-quality pellets without binding agents or bark, the firing chamber should be cleaned once every seven or thirty days. The same way pellets from straw or other biological wastes are made. (e.g. poppy head pellets, rape pellets, turf pellets, etc.) The most frequently used pellet size is with a diameter of 6, 8 and 9 mm and a length of 5 to 25 mm. The heating value is approximately the same as for wooden briquettes, ranging from 14 to 19 MJ/kg. The price of pellets produced by Czech producers, of which there are currently more than fifteen, is 3500,- to 5000,- CZK per ton.

Pellets are currently supplied in the Czech Republic in PVC bags (usually 15, 20 or 25 kg). Abroad, however, pellets are delivered in cistern trucks from which suppliers fill any type of tank, as in the case of LFO (light fuel oil). However, it is necessary to keep several rules which prevent crushing the pellets during pneumatic transport.
The pellets must not drop directly on the hard wall of the hopper; they should drop on a screen which is suspended in the centre of the chamber from the ceiling. This method eliminates crushing pellets into fragments and dust. It is important to keep the pellets in a dry space to prevent their break-down.

D21Pautomatic boiler for D 21 P pellets with a burner for Atmos A25 pellets
+ conveyor DA 1500
+ 500 l (325 kg) hopper for pellets
+ buffer storage tank with internal boiler for service water and a solar exchanger

Boiler space
Boiler space
with a separate hopper (500 l)

Boiler space
Boiler space
with a built-in hopper for pellets (5 cubic metres)

Other examples of pellet boiler room

ATMOS A25/A45 PELLET BURNER

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

Burner display serves for displaying the current state of the burner and for setting its functions

Burner control: electronic regulation AC07X (AC07), which controls the running of the external conveyor, two ignition spirals and the ventilator in accordance with the requirements for the boiler and heating system. Electronics are secured by a safety thermostat of the boiler, a safety thermostat for feeding of pellets into the burner, a sensor of ventilator rotations and a photo cell for recording flames. The running of the boiler is signalised on the electronic regulation display.

Fuel ignition: automatic with the help of two electric ignition spirals.

Basic functions of the boiler:
The option of using two reserve outputs, R and R2 for various applications
Option of connecting four different sensors, TS, TV, TK and TSV
TS - bottom sensor on tank
TV - top sensor on tank
TK - boiler sensor or environment sensor on tank
TSV - sensor of combustion or solar panel

  • Burner control based on two temperatures for the buffer tank
  • boiler ventilator control from the burner with the help of reserve output
  • control of the boiler pump from the burner with the help of reserve output
  • control of the solar power system directly from the burner
  • automatic start of boiler after burn-up of wood for DCxxSP boilers

Appropriate pellet burners for D14P, D15P, D20P, D21P, D25P pellet boilers.

A25
ATMOS A25

Burners IWABO and ATMOS ERATO GP 20 are able to burn only good quality white pellets from soft wood without bark ø 6-8mm, lenght 10-25mm with heating power 16-19 MJ.kg-1. Burners are not able to burn pellets with high caking property in the burning chamber. In this case, the burning chamber should be cleaned once per day.

For these burners, the following conveyors are recommended:

  • A screw conveyor for the ATMOS A25 - DA1500 burner that is 1,5 metres long with a diameter of 75 mm
  • A screw conveyor for the ATMOS A25 - DA2000 burner that is 2 metres long with a diameter of 75 mm
  • A screw conveyor for the ATMOS A25 - DA2500 burner that is 2.5 metres long with a diameter of 75 mm

Appropriate pellet burners for D30P, D45P pellet boilers

ATMOS A45
ATMOS A45

ATMOS A45 8,5 - 49 kW

The burner is only intended for quality white pellets of soft wood without bark with a diameter of 6 to 8 mm, length 10 to 25 mm and calorific value 16 to 19 MJ.kg-1.

An advantage of the burner is the automatic ignition of fuel with a glowing spiral. The glowing spiral may ignite the pellets whenever it is necessary to make a fire. The burner is not intended for dark pellets which cake the burning chamber of a burner. If you do so, the comfort of heating would be lost, and it would be necessary to clean the burning chamber of the burner every 1 to 3 days.

Pro tyto hořáky jsou určeny tyto dopravníky:

  • Worm-conveyor DA50 without shaft, 1.7 meters in length, 90 mm in diameter
  • Worm-conveyor DRA50 with shaft, 1.7 meters in length, 80 mm in diameter
  • Worm-conveyor DRA50 with shaft, 2.5 meters in length, 80 mm in diameter
  • Worm-conveyor DRA50 with shaft, 4 meters in length – straight, 80 mm in diameter
  • Worm-conveyor DRA50 with shaft, 5 meters in length – straight, 80 mm in diameter

When using small sized pellets with the ATMOS A50 burner, we recommend always using conveyors with central shaft DRA50 – 1.7 and DRA50 – 2.5 m for achieving the required performance. The conveyor incline should be larger than 45°.

Burner flame for ATMOS A25 pellets built into boiler D 20 P

Burner flame for ATMOS A25 pellets built into boiler D 20 P

Plamen v kotli Plamen v kotli

Cross-section of the D 14 P, D 21 P, D 25 P Boiler

D 14 P, D21 P
Cross-section of the
D 14 P, D21 P, D 25 P Boiler
D 14 P, D21 P
Cross-section of the
D 14 P, D21 P, D 25 P Boiler

Cross-section of the D 15 P, D 20 P, D 30 P, D 45 P Boiler

D 15 P
Cross-section of the
D 15 P Boiler
D 20 P, D 30 P, D 45 P
Cross-section of the
D 20 P, D 30 P, D 45 P Boiler

Cross-section of the Boiler

D 30 P D 15 P D 20 P D 30 P D 45 P

 

D 14 P, D 21 P, D 25 P D 15 P D 20 P D 31 P

TYP D 14 P D 21 P D 25 P D 31 P D 15 P D 20 P D 30 P D 40 P D 50 P
A 1207 1207 1207 1307 1405 1405 1405 1405 1405
B 570 570 670 882 589 652 954 954 1052
C 620 620 620 620 606 606 606 606 606
D 801 801 801 901 1040 848 848 848 848
E 152 (150) 152 (150) 152 (150) 152 (150) 152 (150) 152 (150) 152 (150) 150 (152) 152 (150)
G 215 215 215 215 211 211 211 211 211
H 934 934 934 1034 1163 1163 1163 1163 1163
CH 221 221 221 221 202 202 202 202 202
I 221 221 221 221 - - - - -
J 6/4" 6/4" 6/4" 6/4" 6/4" 6/4" 6/4" 6/4” 6/4"

 

 TECHNICAL DATA   D14P D21P D 25 P D 31 P D15P D20P D30P D40P D50P
Boiler output kW 4 - 14 4 - 19,5 7 - 24 9 - 30 4,5 - 15 6,5 - 22 8,9 - 29,8 8,9 - 40 13,5 - 45
Heating surface m2 1,7 1,7 2 2,2 1,9 2 2,7 2,7 3,6
Fuel shaft volume dm3 88 88 88 132 70 70 105 105 140
Dimensions of filling opening mm 270x450 270x450 270x450 270x450 270x450 270x450 270x450 270x450 270x450
Specified chimney draught Pa 16 18 22 18 18 15 21 22 23
Maximum working water pressure kPa 250 250 250 250 250 250 250 250 250
Boiler weight kg 231 231 254 263 289 305 370 386 430
Outlet orifice diameter mm 152 152 152 152 152 152 152 150/152 152
Boiler height mm 1207 1207 1207 1307 1405 1405 1405 1405 1405
Boiler width mm 620 620 620 620 606 606 606 606 606
Boiler depth mm 768 768 868 882 470 470 670 954 870
Cover for el. parts IP 20 20
Electric power - upon activation W 522 522 522 520 522 572 530 530 530
Electric power - during operation W 42 42 42 97 42 92 97 97 97
Boiler efficiency % 90,3 90,2 90,2 > 90,2 90,4 91,1 92,4 90,1 91,1
Temperature of combustibles at nominal output (pellets) °C 127 147 151 147 141 128 158 157 123
Weight flow of combustibles at nominal output (pellets) kg/s 0,011 0,015 0,018 0,026 0,012 0,016 0,025 0,031 0,035
Specified fuel   kvalitní pelety o průměru 6 - 8 mm o výhřevnosti
15 - 18 MJ.kg-1
kvalitní pelety o průměru 6 - 8 mm o délce 5 až 25 mm a výhřevnosti 16 - 19 MJ.kg-1 (bílé pelety)
Emergency extra fuel supply     suché dřevo o výhřevnosti 15 - 17 MJ.kg-1 o obsahu vody 12 - 20 %, průměru 80 - 150 mm
Average fuel consumption - pellets at nominal output kg.h-1 3,5 4,5 5,4 6,8 3,7 5 8,6 9,4 10,6
Maximum log length mm         310 310 510 510 710
Burning duration at nominal output - for wood hours         2 2 2 2 2
Water volume in boiler l 56 56 62 70 65 82 91 91 117
Hydraulic loss of boiler mbar 0,18 0,18 0,19 0,19 0,22 0,22 0,23 0,23 0,24
Minimum volume of buffer tank l 500 500 500 500 500 500 750 750 1000
Connecting voltage V/Hz 230/50 230/50
Boiler class pursuant to ČSN EN 303-5   5 5 5 5 5 5 5 5 5
Subsidised boilers in the Czech Republic  

 

Automatic ash removal for system for the DxxP boilers

Automatic ash cleaner/remover from the boiler

As an accessorie for every boiler DXXP made after 1.3.2007 you can buy automatic ash cleaner/remover from boiler to added external ash pan /30/. The automatic ash cleaner/remover does not need any special attendance and increase comfortablë use of boiler.

Ash removal is performed automatically by means of a screw conveyor with a gear unit which removes the ashes from a chamber under the burner at regular intervals after twelve hours, three hours or one hour according to the setting for a particular type of fuel. The automatic ash-removal system can be activated manually by turning on and off a switch on the boiler. Carefully choose the capacity of the ash pan based on ash content and the used fuel.

All three types of ash pan are suitable to use with each of mentioned ash cleaner/remover for boilers D15P, D20P, D30P and D45P.

Ash cleaner/remover – without ash pan

Code  
S0577  for boilers D14P, D21P      
S0535 for boilersD15P, D20P       
S0536 for boilers D30P       
S0537 for boilers D45P                        

 

Ash pan – needed accessories (red color)

Code  
S0542 Small - capacity 28 l
Recommended capacity for boilers D14P, D21P, D15P, D20P when heating with good quality pellets. Cleaning interval 7 - 30 days.
S0544 Middle - capacity 68 l
Recommended capacity for boilers D14P, D21P, D15P, D20P, D30P, D45P when heating with good quality pellets. Cleaning interval 14 - 30 days.
S0546 Big - capacity 135 l
Recommended capacity for boiler D45P when heating with alternative biomass pellets. Cleaning interval 14 - 45 days

Automatické vybírání popela

Automatické vybírání popela


The Latest News

High-efficiency circulation pumps

Pricelist

Equithermal regulation

Accessories for boilers

Other 42 recommended configuration of installation

Boiler-room for pellet boiler

Exhibitions where you can find us

19.1. - 22.1.
Infotherma - Ostrava

11.2. - 14.2.
Moderní vytápění - Praha

10.2. - 13.2.
Aquatherm - Nitra

7.2. - 15. 2.
Haus,Garten - Lipsko

25.2. - 1.3.
Energiesparmesse - Wels

4.3. - 6.3.
EUREXPO - Lyon

10.3. - 14.3.
ISH - Frankfurt

13.5. - 17.5.
Hobby - České Budějovice

20.8. - 23.8.
Agrokomplex Nitra

27.8. - 1.9.
Země Živitelka - Č.B.

11.9. - 19.9.
Zahrada Čech Litoměřice

15.9. - 19.9.
For Therm - Praha

28.10. - 30.10.
SHKG - Lipsko

8.11. - 14. 11.
Agritechnica - Hannover

Useful Links

 

ISO

ISO 14001
ISO
14001
ISO 9001
ISO
9001
ISO 18001
ISO
18001