AUTOMATIC HOT WATER BOILER
Adjustable power 22 – 80,5 kW
Automatic hot water boiler ROJEK TKA 80 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.
TECHNICAL DATA
| Boiler | |
| Nominal power – fuel wooden pellets | 80,5 kW |
| Nominal power – fuel brown coal (grain size 4-25mm) | 74,8 kW |
| Minimal power – fuel wooden pellets | 23,2 kW |
| Minimal power – fuel brown coal (grain size 4-25mm) | 20,8 kW |
| Boiler width | 1 605 mm |
| Boiler height | 1 849 mm |
| Boiler depth | 1 412 mm |
| Boiler depth, incl. chimney | 1 682 mm |
| Chimney height | 1 668,5 mm |
| Chimney diameter | 219 mm |
| Height of water inlet | 602,5 mm |
| Diameter of water inlet and outlet | 2″ |
| Volume of combustion chamber | 300 l |
| Boiler weight | 1 240 kg |
| Boiler class in accordance with Norm EN 303-5 | 3 |
| Efficiency | 90,6 % |
| Energy efficiency class of wood / coal | A + / C |
| Energy Efficiency Index (EEI) of pellets / coal | 117 / 79 |
| Seasonal energy efficiency of pellets / coal | 81 % / 79 % |
| Boiler emissions according to Commission Regulation (EU) No. 2015/1189 | – |
| Hydraulic boiler loss | 132 mbar |
| Size of loading hatch, semicircle – width x height | 395 x 295 mm |
| Water volume | 262 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 | 18 – 29 Pa |
| Consumption of wooden pellets with nominal power | 18,72 kg/h |
| Consumption of wooden pellets for minimum capacity | 5,38 kg/h |
| Consumption of brown coal for nominal capacity | 13,86 kg/h |
| Consumption of brown coal for minimum capacity | 3,76 kg/h |
| Temperature of burnt gas for nominal output | 190 °C |
| Hopper volume | 800 l |
| Approx. weight of pellets in hopper | 480 kg |
| Voltage / frequency | 3 x 400 V / 50 Hz |
guarantee for the tightness of boiler body 3 years
The automatic hot water boiler ROJEK TKA 80 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.
ROJEK TKA 80 complies with Class 5 and EKODESIGN in accordance with the Norm ČSN EN 303-5 for both the pellets and Class 4 brown coal (fraction 4 – 25 mm) in automacic operation.
The controller basically contains a built-in module for controlling a four-way or three-way mixing valve. Furthermore, the ST 480 zPID controller can cooperate with an equithermal sensor, with other four-way or three-way valves, with a room thermostat, with a GSM module, with an Ethernet module (via the Internet)
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.
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 80 you can burn piece wood, biomass and other solid fuels in manual operation.
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.
You can also be interested
