Gas-fired central heating boilers - H2NG and ACCF. Expansion of EN 15502-2-1:2022
Gas-fired central heating boilers - H2NG and ACCF. Expansion of EN 15502-2-1:2022
1 Scope Shall be according to EN 15502‑2‑1:2022, Clause 1 with the following modifications: Add at the end of the list, after k), following: “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 ”: l) which are fully premixed appliances equipped with an Adaptive Combustion Control Function ( ACCF ) that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance including gas grids for natural gases of the second family where up to 20 mol% H 2 is added to the natural gas (H2NG-Y20). m) which are fully premixed appliances equipped with a Pneumatic Gas/Air Ratio controller ( PGAR ) that are intended to be connected to gas grids for natural gases of the second family where up to 20 mol% H 2 is added to the natural gas (H2NG-Y20), where the quality of the distributed gas without adding the hydrogen is not likely to vary to a large extent over the lifetime of the appliance. Replace in the list following “This document does not cover all the requirements for”: ab) and ak) and al) by: ab) appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex AB of EN 15502‑1:2021), exce...
Другие стандарты PD