scope:

This standard applies to heating boilers in accordance with EN 303 part 1 with atomizing oil burners in accordance with EN 267 up to a nominal heat output of 300 kW which are designed for operating with liquid fuels with a viscosity at the burner inlet of (5,5 + 0,5) mm²/s at a temperature of 20°C and a density of 0,83-0,86 g/cm3 at a temperature of 15°C and with kerosene with a viscosity of 1,3 to 2,9 mm²/s at 20°C and a density of 0,77 to 0,80 g/cm3 at 15°C. The requirements of this standard apply to heating boilers which are tested on a test rig in accordance with the test code given in EN 304. The purpose of this standard is to lay down the necessary heating technical requirements for heating boilers with liquid fuels.