scope:

1.1 General This draft European Standard applies to heating boilers up to a nominal heat output of 500 kW which are designed for the burning of solid fuels only and are operated according to the instructions of the boiler manufacturer. Solid fuels in this standard are: 1.2 Biogenic fuels Biomass in natural state in form of: a) A log wood with water content w <= 25 %; b) B1 chipped wood (wood chipped by machine with and without bark, usually up to a maximum length of 15 cm) water content from w 15 % to w 35 %; c) B2 chipped wood as under B1, except w > 35 % moisture; d) C1 compressed wood (pellets without binding agents, made of wood and/or bark particles; permitted are natural binding agents such as molasses, vegetable paraffins and starch); Pellets according to EN 14961-2 (under development); e) C2 compressed wood (briquettes without binding agents, made of wood and/or bark particles; permitted are natural binding agents such as molasses, vegetable paraffins and starch); Briquettes according to EN 14961-3 (under development); f) D sawdust up to w 50 % moisture; g) E non woody biomass such as straws, reeds, kernels and grains. 1.3 Fossil fuels a) bituminous coal; b) brown coal; c) coke; d) anthracite. 1.4 Other solid fuels (e.g. peat) The boilers can be used with natural draught or forced draught. The stoking can be manual or automatic. This standard contains requirements and test methods for safety, combustion quality, operating characteristics and maintenance of heating boilers and covers also all external equipment that influences the safety systems (e.g. backburn safety device, integral fuel hopper). This standard covers only boilers including burners as a unit. A matching of a boiler body with a burner according to EN 15270 is only possible if the whole unit is tested to this standard. (...)