AUTOMATIC HOT WATER BOILER
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.
|Nominal output||15 kW|
|Min. output||3,5 kW|
|Boiler width||614 mm|
|Boiler height||1530 mm|
|Boiler depth||686 mm|
|Boiler depth, incl. chimney||910 mm|
|Chimney height||1424 mm|
|Chimney diameter||159 mm|
|Height of water inlet||632 mm|
|Diameter of water inlet and outlet||2″|
|Volume of combustion chamber||100 l|
|Boiler weight||433 kg|
|Boiler class in accordance with Norm EN 303-5||4/5|
|Energy efficiency class of wood / coal||A + / C|
|Energy Efficiency Index (EEI) of pellets / coal||112 / 76|
|Seasonal energy efficiency of pellets / coal||77 % / 76 %|
|Boiler emissions according to Commission Regulation (EU) No. 2015/1189||EKODESIGN|
|Hydraulic boiler loss||59 mbar|
|Size of loading hatch, semicircle – width x height||250/ 237 mm|
|Water volume||86 l|
|Max. operation water overpressure||2 bar|
|Min. operation water overpressure||0,5 bar|
|Testing water overpressure||4 bar|
|Max. operation temperature||90 °C|
|Specified chimney draught||10 – 15 Pa|
|Consumption of wooden pellets with nominal power||2,9 kg/h|
|Consumption of wooden pellets for minimum capacity||0,7 kg/h|
|Consumption of brown coal for nominal capacity||3,1 kg/h|
|Consumption of brown coal for minimum capacity||0,4 kg/h|
|Temperature of burnt gas for nominal output||180 °C|
|Hopper volume 300l|
|Hopper volume||300 l|
|Approx. weight of pellets in hopper||180 kg|
|Boiler width, incl. hopper||1370 mm|
|Hopper volume 500l|
|Hopper volume||500 l|
|Approx. weight of pellets in hopper||300 kg|
|Boiler width, incl. hopper||1 435 mm|
guarantee for the tightness of boiler body 3 years
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 /Class 5/ 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.