1 This standard applies to heating boilers 1n 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 fuelsow1th a viscosity at the burner inlet of (5.5 + 0.5) mm /s at a temperature of 20°Cand a density of 0.83 - 0.86 g/cm3 at a temperature of 15 0C and with kerosene with a viscosity of 1,3 to 2,9 ronVs at 20°C and a density of 0,77 to 0,80 g/cm' 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 1n EN 304.
1 The purpose of this standard 1s to lay down the necessary heating technical requirements for heating boilers with liquid fuels.