Cast-iron boiler Viadrus Hercules U32 5 segments - hard coal - 15kW
Viadrus Hercules U32 is a cast iron pyrolitic boiler with manual fuel feeding, designed for ecological combustion of hard coal. The combustion can be carried out by natural exhaust extraction without the use of a mechanical fan. In systems with natural circulation of heating water, the boiler does not require the installation of a circulation pump.
It meets the requirements of emission class 5 according to EN 303-5 and EKODESIGN directive for hard coal.
Advantages of the U32 boiler
- High efficiency when burning coal.
- Long service life of the cast iron heat exchanger
- Water grate
- Gravitational operation possible without circulation pump
- Threaded supply and return flanges for easy installation
- Low exhaust temperature (130-170 °C)
- Boiler operation is not dependent on electricity, no need to install a circulation pump and forced flue gas extraction.
VIADRUS a.s. provides a warranty for:
- boiler 60 months from the date of sale;
- cast iron body of the boiler 10 years from the date of sale;
- spare parts of the boiler 24 months from the date of sale.
Boiler construction:
- Front member
- The middle section
- The penultimate segment
- Rear member
- Ashtray door
- Back-up doors
- Ashtray door choke
- Choke for back-up doors
- Rear choke
- Sunroof
- Housing
In boilers with the number of modules 6 or 7 there is no vertical grate installed, it is replaced by a sliding grate located inside the boiler. If it is necessary to install the grate, it should be purchased separately.
Number of sections | Unit | 5 | 6 | 7 |
Combustion chamber volume | dm3 | 32 | 39 | 51 |
Water content | l | 40,5 | 46,5 | 52,5 |
Weight | kg | 348 | 410 | 472 |
Combustion chamber depth | mm | 280 | 370 | 480 |
Flue socket diameter | mm | 156 | ||
Boiler dimensions: – height x width | mm | 1240 x 683 | ||
Boiler dimensions: – depth | mm | 881 | 992 | 1103 |
Filling hole dimensions | mm | 310 x236 | ||
Maximum water operating pressure | kPa (bar) | 400(4) | ||
Minimum water operating pressure | kPa(bar) | 50(0,5) | ||
Test water overpressure | kPa(bar) | 800(8) | ||
Input water minimum temperaturer | °C | 50 | ||
Heating water recommended operating temperature | °C | 60 - 80 | ||
Noise level | dB | <65 | ||
Boiler connections: – heating water / return water | - | 2" | ||
Temperature of cooling water for the device for removing excess heat |
ºC | 5 - 20 | ||
Overpressure of cooling water for the device for removing excess heat |
kPa(bar) | 200 - 600 (2 -6) |
HERCULES U32 technical parameters - fuel: hard coal
grain size 20 - 40 mm, fuel moisture max. 15 %, calorific power: 26 - 29 MJ.kg-1
Number of sections | Unit | 5 | 6 | 7 |
Boiler class in accordance with EN 303 – 5 | - | 5 | ||
Rated power | kW | 15 | 21 | 25 |
Fuel consumption | kg/h | 2,1 | 3,1 | 3,5 |
Max. fuel mass in the filling chamber | kg | 18 | 21 | 25 |
Flue gas temperature at rated output | °C | 130 - 170 | ||
Flue gas mass flow at rated power | kg/sec | 0,008 | 0,0127 | 0,0133 |
Chimney draught | mbar | 0,18 | 0,23 | 0,25 |
Burning time | h | min. 4 | ||
Efficiency | % | 89,6 | 88,6 | 89,4 |
Energy efficiency class | - | C | ||
Energy efficiency index | - | 83 | 82 | 82 |
Season energy efficiency | % | 83 | 82 | 82 |
Product specification
Power output | 15 kW |
Exhaust gas pipe diameter | 156 mm |
Weight | 348 kg |
Boiler class (303-5:2012) | 5 |
Ecodesign | yes |
Water capacity | 40.5 L |
Height | 1240 mm |
Width | 683 mm |
Exhaust pipe distance measured from the floor to its axis. | 612 mm |
Depth | 881 mm |
Burning place depth | 280 mm |
Max. water temperature | 80 °C |
Max working pressure | 4 bar |
Loading compartment dimensions | 310 x 236 mm |
Required chimney draught | 18 Pa |
Outlet and inlet size | 2 inch |
Number of segments | 5 pcs |
Min. incoming water temperature | 50 °C |
Warranty | 60 months |
Mass flow | 0.008 kg/s |
Flue gas temperature | 130 ÷ 170 °C |
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