EN 15502-2-1:2012+A1:2016

European foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Classification
5 Construction
6 Electrical safety
7 Controls
8 Operational requirements
9 Useful efficiencies
10 Electric auxiliary energy
11 Risk assessment
12 Marking and instructions
13 Requirements for Eco-design Regulation
   (No 813/2013) and Energy Labelling
   Regulation (No 811/2013)
101 Figures
102 Listing of tables and numbers
103 Annexes
Annex V (informative) - Standards replaced by this
        standard in combination with part 1
Annex XA (normative) - Test apparatus for type C[2] boilers
Annex XB (normative) - Test methods to determine the
         effects of long-term thermal load, long-term
         condensate exposure, condensing/non-condensing
         cycling and resistance to UV radiation
Annex XC (informative) - Variations in gas quality
Annex XD (informative) - Example on calculation of
         common duct system for type C[11] boilers
Annex ZB (informative) - Clauses of this European
         Standard addressing the methods for the
         verification of the efficiency of the EU
         Directive 92/42/EEC, relating to the
         efficiency of new hot boilers with an
         output of (4 - 400) kW
Annex ZC (informative) - Relationship between this
         European Standard and the Requirements of
         COMMISSION REGULATION (EU) No
         813/2013 of 2 August 2013 implementing
         Directive 2009/125/EC of the European
         Parliament and of the Council with regard
         to ecodesign requirements for space heaters
         and combination heaters
Annex ZD (informative) - Relationship between this
         European Standard and the Requirements of
         COMMISSION DELEGATED REGULATION
         (EU) No 811/2013 of 18 February 2013
         supplementing Directive 2010/30/EU of the
         European Parliament and of the Council with
         regard to the energy labelling of space heaters,
         combination heaters, packages of space heater,
         temperature control and solar device and
         packages of combination heater, temperature
         control and solar device
Bibliography

This European Standard specifies, the requirements and test methods concerning, in particular, the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as boilers.Where the word boiler is used, it needs to be read as the boiler including its connecting ducts, ducts and terminals, if any.This European Standard covers gas-fired central heating boilers from the types C1 up to C9 and the types B2, B3 and B5:NOTEFor further background information on appliance types see CEN/TR 1749:2014.a)that have a nominal heat input (on the basis of net calorific value) not exceeding 1 000 kW;b)that use one or more combustible gases of the three gas families at the pressures stated in EN 437;c)where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;d)where the maximum operating pressure in the water circuit does not exceed 6 bar;e)which may or may not give rise to condensation under certain circumstances;f)which are declared in the installation instructions to be either a condensing boiler or a "low temperature boiler" or a standard boiler; if no declaration is given the boiler is to be considered a standard boiler;g)which are intended to be installed either indoors or outdoors in a partially protected place;h)which may include the facility to produce hot water, either by the instantaneous or storage principle, the whole being marketed as a single unit;i)which are designed for either sealed water systems or for open water systems;j)which are either modular boilers, or non- modular boilers.This European Standard also covers gas-fired condensing central heating boilers from the types C(10) that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa, ).and C(11) boilers that have condensing boiler modules that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa.This European Standard provides requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard, the risk associated with this alternative construction needs to be assessed.An example of an assessment methodology, based upon risk assessment and which covers the essential requirements of the Gas Appliance Directive, is given in Clause 11.This European Standard does not cover all the requirements for:k)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 XC);l)Appliances using flue dampers;m)Appliances of the types B21, B31, B51, C21, C41, C51, C61, C71, C81 ,C(12) and C(13);n)C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW;o)Appliances incorporating flexible plastic flue liners;p)C(10) boilers:1) without a gas-air ratio control, or2) which are non-condensing appliances, or3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (∆pmax, saf(min)), - ;q)C(11) boilers that have boiler modules:1) without a gas-air ratio control, or2) which are non-condensing appliances, or3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (∆pmax, saf(min));r)Appliances intended to be connected to a (common) flue having mechanical extraction.