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14.1.2022 7:59:45
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Mgr.Vojtěch Kerhart

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TKA 15 - Automatic hot water boiler for solid fuels

burning boilers,

Adjustable power 3, 5 – 15 kW

Automatic hot water boiler ROJEK TKA 15 enables to burn brown coal grain size 4-25 mm or wooden pellets 6 – 10 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. With an additional folding grate of cast iron segments in the boiler ROJEK TKA 15 you can burn piece wood, biomass and other solid fuels in manual operation.

With wooden pellets and brown coal - grain size 4 - 25 mm 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.

The automatic hot water boiler ROJEK TKA 15 can work both in automatic and also in manual operation. It is provided by a cooling loop (a protection against overheating), a folding grate made of segments and a tilting front grate, both of quality cast inon, and a thermostatic draught control with a chain in order to adjust the inlet of primary air - power control in manual operation.

TKA 15 - Enlarge

TKA 15 - Technical data

Nominal output 15 kW
Min. output3,5 kW
Boiler width614 mm
Boiler height1530 mm
Boiler depth686 mm
Boiler depth incl. chimney910 mm
Chimney height1424 mm
Chimney diameter159 mm
Height of water inlet632 mm
Diameter of water inlet and outlet 2"
Volume of combustion chamber100 l
Boiler weight433 kg
Boiler class in accordance with Norm EN 303-54
Efficiency82,7 %
Pellet / coal energy efficiency classA + / C
Energy efficiency index (EEI) of pellets / coal112 / 76
Seasonal energy efficiency of pellets / coal77 % / 76 %
Boiler emissions according to Commission Regulation (EU) No. 2015/1189 EKODESIGN
Hydraulic boiler loss 59 mbar
Size of loading hatch, semicircle - width x height250/237 mm
Water volume86 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 capacity0,7 kg/h
Consumption of brown coal for nominal capacity3,1 kg/h
Consumption of brown coal for minimum capacity0,4 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 370 mm
Hopper 500 l
Hopper volume500 l
Approx. weight of pellets in hopper300 kg
Boiler width incl. hopper1 435 mm

TKA 15 - Details

High quality wooden pellets
Plant pellets
Wooden pellets with bark mixture
Brown coal, grain size 4 - 25 mm

TKA 15 - Videos

TKA 15 - Documents to download

DocumentSizeType of documentLanguage
Kotle_UK.pdf2 523,2 kBHot water boilers for wo (show-card)English
Kotle_RO.pdf3 343,6 kBHot water boilers for wo (show-card)Romania
Kotle_HU.pdf1 653,8 kBHot water boilers for wo (show-card)Magyar
Kotle_FR.pdf3 136,9 kBHot water boilers for wo (show-card)Français
TTP/OZ_TKA15.pdf211,5 kBTest certificate TKA 15 (certificate)ČeskyEnglish

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