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HEAT ENGINEERING

A 15 - Automatic hot water boiler for wooden pellets

burning boilers,

The boiler ROJEK A 15 is designed for heating buildings with low heat loss, adjustable power 3 – 13 kW.


Automatic hot water boiler A 15 enables to burn wooden pellets 6 – 8 mm diam. - both high quality white pellets and pellets of lower quality with bark mixture in automatic operation.

Retort burner enables to burn also lower quality bio fuels - plant pellets and in combination with an adapter also corn.

In automatic operation the boiler complies with Class 4 in accordance with the norm ČSN EN 303-5.

Thanks to the fuel tank, electronic regulation and the burner with spiral feeder the boiler can work in automatic operation even for several days. The electronic regulation can be connected with a circular pump ( adjustment of temperature when the pump switches on ) and at the same time with room thermostat.

The burner is installed in the lower part of boiler body. The retort burner is designed for lower fuel loading and the combustion process itself can be compared with a blacksmith hearth. From the tank the fuel is feeded by spiral feeder to the retort knee. Here it is forced out up to a round grate.

Both the grate and the retort are made of high quality cast iron. The retort is placed in a converter to which the air is blown by a blower. Through the slots between the retort and the grate the air is then driven to the burning fuel layer.

A 15 - Enlarge

A 15 - Technical data

Boiler
Nominal output 14 kW
Min. output3 kW
Boiler width507 mm
Boiler height1105 mm
Boiler depth780 mm
Boiler depth incl. chimney780 mm
Chimney height625 mm
Chimney diameter129 mm
Height of water inlet133 mm
Diameter of water inlet and outlet 2"
Boiler weight310 kg
Boiler class in accordance with Norm EN 303-55
Efficiency86,9 %
texttd(667)A + / -
texttd(668)112 / -
texttd(669)77 % / -
texttd(666)EKODESIGN
Hydraulic boiler loss 59 mbar
Water volume106 l
Max. operation water overpressure2 bar
Min. operation water overpressure0,5 bar
Testing water overpressure4 bar
Max. operation temperature90 °C
Specified chimney draught10 - 15 Pa
Consumption of wooden pellets with nominal power2,9 kg/h
Consumption of wooden pellets for minimum capacity0,9 kg/h
Temperature of burnt gas for nominal output180 °C
Hopper 300 l
Hopper volume300 l
Approx. weight of pellets in hopper180 kg
Boiler width incl. hopper1 130 mm

A 15 - Details

Enlarge
Enlarge
Enlarge
High quality wooden pellets
Enlarge
Wooden pellets with bark mixture
Enlarge
Plant pellets

A 15 - Videos

Video
KTP
19 078,6 kB

A 15 - Documents to download

DocumentSizeType of documentLanguage
Kotle_UK.pdf2 523,2 kBHot water boilers for wo (show-card)English
Kotle_HU.pdf1 653,8 kBHot water boilers for wo (show-card)Magyar
Kotle_RO.pdf3 343,6 kBHot water boilers for wo (show-card)Romania
TTP/Cert_A_15.pdf1 220,7 kBA 15, A15 U (certificate)Česky
TTP/OZ_A15.pdf1 254,1 kBA 15, A 15U (certificate)ČeskyEnglish


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