Hot water boiler KTP 20
The ROJEK KTP 20 hot water boiler for manual feeding is designed for burning lump wood (emission class 5) and brown coal size "Kostka" (emission class 4). For both types of fuel it meets the EKODESIGN. This type of boiler is very popular with our customers because it is simple to operate and clean. The boiler does not need electricity to operate, it is fanless and without electronics. The boiler can be connected to both the solitary and compulsory circulation with a pump. This type of boiler is not sensitive to fuel quality.
Product code: 1022005
Technical parameters
| Rated power | 20 kW |
| Boiler width | 622 mm |
| Boiler depth | 550 mm |
| Boiler height | 1193 mm |
| Grate depth | 350 mm |
| Height of flue pipe | 1089 mm |
| Flue diameter (diameter of the boiler extension) | 160 (159) mm |
| Water inlet height | 293.5 mm |
| Building depth | 773 mm |
| Diameter of water inlet and outlet | G 2" |
| Max. diameter/length of logs | 20 / 33 cm |
| Volume of combustion chamber | 47,9 l |
| Boiler weight | 261 kg |
| Efficiency brown coal / wood | 85 % to 89 % / 78 % to 88 % |
| Boiler class according to EN 303-5 | 4 |
| Boiler emissions according to Commission Regulation (EU) 2015/1189 - lignite fuel | EKODESIGN |
| Energy efficiency class of coal | C |
| Seasonal energy efficiency of coal | 79 % |
| Flue gas volume flow - nominal. output | 146 m3/h |
| Hydraulic loss of the boiler | 0,4 mbar |
| Dimensions of the filling opening - semicircle width x height | 245 / 230 mm |
| Volume of water in the boiler body | 98 l |
| Maximum operating water pressure | 2 bar |
| Minimum operating water pressure | 0,5 bar |
| Test water pressure | 4 bar |
| Maximum operating temperature | 90 °C |
| Prescribed chimney draft brown coal / wood | 16 Pa - 20 Pa / 14 Pa - 18 Pa |
| Flue gas temperature at rated output | 220 - 300 °C |
| Recommended storage volume | 800 l |
Description of the boiler
The hot water boiler KTP 20 for manual feeding is designed for burning lump wood and brown coal Kostka (40 - 100 mm), calorific value 17 - 20 MJ/kg. For these fuels the boiler meets Class 4 according to EN 303 - 5. Other alternative fuels are short piece wood, briquettes, fresh sawdust, wet wood chips and other wet biomass.
This is made possible by the original design of the boiler, with dual (two-stage) combustion of the fuel, approximately 80% gasification and approximately 20% conventional combustion. Thanks to the combination of both types of combustion, the fuel is perfectly utilized and burnt out. Both primary and secondary air supply can be easily controlled, thus achieving optimum combustion and long fuel burn-out times.
The boiler is constructed of a double steel structure (inner plates 5 mm thick, outer 4 mm) filled with water. The water is also in a solid grate made of heat pipes. This design ensures maximum transfer of heat energy and at the same time prolongs the life of the boiler.
Advantages of KTP boilers:
- 6-year warranty on the tightness of the boiler body
- ability to burn a wide range of fuels
- it is also possible to burn wet fuel or biomass
- thanks to the double combustion, the mixture is perfectly burnt through, thus suppressing the formation of harmful emissions and condensates
- the boiler is designed for a small chimney draft of 15 - 20 Pa, therefore it does not need an electric exhaust fan to operate
- the boilers are equipped with an after-cooling loop (overheating protection) and allow operation both on the heating water circulation alone and on forced circulation
- thetemperature of the return water can drop to 55º C, this is made possible by the fact that the return water is fed back into the boiler directly into the tubular grate of the fireplace
- flue gas temperature 220 - 300 °C
- the boiler can be connected without a storage tank if operated at rated output
KTP boilers meet emission Class 4 and can be used after 2022.
A quality pellet burner assembly can be added to this KTP 20 manual feed boiler to make it a fully automatic KTP 20 PELLET boiler.
You will definitely appreciate this product
Rear side of the boiler with vertical smoke extraction
Rear side of the boiler with horizontal smoke extraction
KTP boiler weldment
Ceramics in KTP boilers
Katalog-TT-Rojek-082022
(Katalog-TT-Rojek-082022.pdf)
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