ÖNORM EN 89

This European Standard defines the specifications and test methods for the construction, safety, rational use of energy and fitness for purpose, environment and classification and marking of gas-fired storage water heaters for domestic hot water uses, hereafter called "appliance". Requirements on NOx emissions measurement for modulating water heaters are not included in this European Standard. This standard applies to appliances : of types B11, B11BS, C11, C21, C31 C51, C72, C73, C81 connected to an individual flue duct, C82 and C83; fitted with atmospheric burners ; using one or more combustible gases corresponding to the three gas families and the pressures indicated in EN 437 ; of nominal heat input not exceeding 150 kW (net calorific value) ; using or not the water condensation heat in the combustion products ; appliances whether subject to the water mains pressure or open-circuit; fitted with electrically operated mechanical flue dampers that are positioned downstream of the heat exchanger and tested as an integral part of the water heater. This standard does not contain all the requirements necessary for : appliances intended to be connected to a mechanical means of evacuating the combustion products ; appliances which fulfill a dual role of space heating and heating water for domestic hot water use ; appliances with a combustion products discharge safety device other than that for type B11BS appliances ; The incorporated amendment A1 completes EN 89 : Gas-burning storage water heaters for domestic hot water uses with sealed combustion circuit with a fan incorporated in the combustion air circuit or combustion products evacuation circuit, or total premix burner circuit. The amendment A1 does not contain all the necessary requirements to make it applicable to appliances with a variable combustion air flow rate. It is applicable to Type C12, C13, C32, C33, C42, C43, C52, C53, C62, C6 (...abbreviated)