Manual fired boiler for coal DEFRO Optima Komfort Eko 12
The DEFRO Optima Comfort Eko boiler is a stoker boiler for hard coal. It has a body made of certified boiler steel sheet. Collaboration with an accumulator tank is required.
Primary air is gravitationally supplied from the outside through a tilting flap located in the doors of the combustion chamber-ash pan, controlled by a draft gauge.
The boiler is adapted for installation in a closed system provided that safety measures are installed according to the boiler Technical Conditions (DTR), and it has the possibility of regulating the secondary air supply.
The boilers meet the energy-emission requirements of class 5 and have an Ecodesign Certificate.
Advantages:
- High thermal efficiency in the range of 90.0 to 90.9% due to increased heat recovery from flue gases;
- Boiler adapted as standard for installation in a closed system provided that safety measures are installed according to the boiler Technical Conditions (DTR);
- Heat exchanger made of certified high-grade steel;
- Change of door opening direction (applies to upper and middle doors);
- Regulation of secondary air supply;
- Large charging chamber;
- Suitable for installation of a thermostatic draft gauge;
- Mechanical regulation of the combustion process using a knob on the ash door;
- Boiler adapted for installation in a closed system provided that safety measures are installed according to the boiler Technical Conditions (DTR);
- 3 years warranty on the tightness of the heat exchanger, 2 years on the other parts and proper operation of the boiler - provided that the installation is done according to the boiler Technical Conditions (DTR);
| Specification/Boiler type | Unit | Optima Comfort Eko 9 | Optima Comfort Eko 12 | Optima Comfort Eko 14 | Optima Comfort Eko 17 | Optima Comfort Eko 19 |
| Fuel | [-] | hard coal - nut with a granulation of 20-50mm | ||||
| Hopper capacity | [kg] | 14 | 19 | 20 | 23 | 25 |
| Efficiency at nominal power | [%] | 90.0 | 91.0 | 90.8 | 90.1 | 90.4 |
| Energy efficiency class | [-] | B | ||||
| Max. permissible operating pressure | [bar] | 1.5 | ||||
| Required flue draught | [mbar] | 0.22 | 0.16 | 0.26 | 0.22 | 0.26 |
| Maximum water temperature at supply | [°C] | 65/90 | ||||
| Boiler mass | [kg] | 262 | 275 | 300 | 300 | 355 |
| Boiler water capacity | [l] | 58 | 63 | 76 | 68 | 83 |
| Inlet and return diameter | [inch] | G 1½” | ||||
| Flue gas outlet diameter | [mm] | Ø 159 | ||||
| Minimum safe capacity of the accumulator tank | [l] | 450 | 600 | 750 | 900 | 1000 |
Dimensions:
Product specification
| Power output | 12 kW |
| Exhaust gas pipe diameter | 159 mm |
| Weight | 275 kg |
| Efficiency | 91,0 % |
| Boiler class (303-5:2012) | 5 |
| Ecodesign | + |
| Water capacity | 63 L |
| Height | 1165 mm |
| Width | 432 mm |
| Depth | 893 mm |
| Outlet and inlet size | 1 ½ inch |
| Producer's recommended minimum volume of accumulation tanks | 600 L |
Opinions
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