Gas-fired central heating boilers - 100 % Hydrogen. Expansion of EN 15502-2-1:2022
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1 Scope Shall be according to EN 15502‑2‑1:2022+A1:2023, Clause 1 with the following modifications: Replace: “This document covers gas-fired central heating boilers from the types C 1 up to C (11) and the types B 2 , B 3 and B 5 :” By: “This document covers gas-fired central heating boilers from the types C 1 , C 3 up to C 9 and the types B 2 , B 3 and B 5 :” b) is replaced by: “b) that use combustible gases of gas group 4Y at the nominal pressure of 20 mbar; “ k) is not applicable. Add at the end of the list, after k), the following: l) which are fully premixed appliances equipped with a Pneumatic Gas/Air Ratio controller (PGAR) or an Adaptive Combustion Control Function (ACCF) that are intended to be connected to hydrogen gas grids where the quality of the distributed hydrogen gas is likely expected to stay within a Wobbe index range of 42 to 46 MJ/m 3 . Replace in the list following “This document does not cover all the requirements for:” ab), ag), ah) and al) by: ab) appliances that are intend...
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