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BS EN 15502-2-1:2022

BS EN 15502-2-1:2022

$227.44

Gas-fired central heating boilers – Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW

Published By Publication Date Number of Pages
BSI 2022 112
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This document specifies the requirements and test methods, 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”. This document is intended to be used in conjunction with EN 15502-1:2021. This document covers gas-fired central heating boilers from the types C1 up to C(11) and the types B2, B3 and B5: NOTE 1 For further background information on appliance types see EN 1749:2020. 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 437:2021; c) where the temperature of the heat transfer fluid does not exceed 105 Ā°C during normal operation; d) where the maximum operating pressure in the water circuit does not exceed 6 bar; e) which can give rise to condensation under certain circumstances; f) which are declared in the instructions for installation 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 inside a building or in a partially protected place; h) which are intended to produce also hot water either by the instantaneous or storage principle 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. k) which are from the types C(10) that are equipped with a gas-air ratio control and that have a āˆ†pmax, saf(min) of 25 Pa, and C(11) that have condensing boiler modules that are equipped with a gas-air ratio control and that have a āˆ†pmax, saf(min) of 25 Pa. NOTE 2 This document 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, is given in Clause 11. This document does not cover all the requirements for: aa) appliances above 1 000 kW; 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); ac) appliances using flue dampers; ad) appliances of the types B21, B31, B51, C21, C41, C51, C61, C71, C81, C(12) and C(13); ae) C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW; af) appliances incorporating flexible plastic flue liners; ag) C(10) boilers: 1) without a gas-air ratio control, or 2) which are non-condensing appliances, or 3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (āˆ†pmax, saf(min)); ah) C(11) boilers that have boiler modules: 1) without a gas-air ratio control, or 2) which are non-condensing appliances, or 3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (āˆ†pmax, saf(min)); ai) appliances intended to be connected to a flue having mechanical extraction; aj) surface temperatures of external parts particular to children and elderly people; ak) appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas; al) appliances equipped with an adaptive combustion control function (ACCF); am) boilers intended to be installed in areas accessible to elderly people and children.

PDF Catalog

PDF Pages PDF Title
2 undefined
15 1 Scope
16 2 Normative references
18 3 Terms, definitions and symbols
19 4 Classification
5 Construction
5.4.6.101 General
20 5.4.6.102 Air supply and combustion products evacuation ducts
5.4.6.103 Terminal
5.4.6.104 Terminal guard
5.4.6.105 Fitting piece
21 6 Electrical safety
7 Controls
8 Operational requirements
22 8.1.2.1 Installation of the boiler
23 8.1.2.2 Gases used for testing
8.1.2.3 Conduct of test to obtain a heat input
8.1.2.4 Water circuit
8.1.2.5 Thermal equilibrium
8.1.2.6 General test conditions for combination boilers
8.1.2.7 Electrical supply
8.1.2.8 Tolerances of measurements
8.1.2.101 Pressure differences at different operational situations for type C(10) boilers
24 8.1.2.102 Pressure differences at different operational situations for type C(11) boilers
25 8.2.2.101 General
26 8.2.2.102 Soundness of the air supply and combustion product circuit type C boilers
28 8.2.2.103 Soundness of the combustion product circuit of type B boilers
30 8.4.101.1 Heat input at maximum functional pressure difference at maximum heat input
8.4.101.2 Heat input at maximum safety pressure difference at minimum heat input
31 8.5.101.1 Requirements
8.5.101.2 Test conditions
8.6.2.101 Additional requirements for type C(10) boilers and C(11) boiler modules
32 8.6.3.101 Requirements for ignition, cross lighting and combustion stability
8.6.3.102 General test conditions
8.6.3.103 Test conditions for Type C1, C3 and C9 boilers
33 8.6.3.104 Test conditions for type C2 boilers
8.6.3.105 Test conditions for type C4 boilers
8.6.3.106 Test conditions for type C5 boilers
8.6.3.107 Test conditions for type C6 boilers
8.6.3.108 Test conditions for type C7 boilers
8.6.3.109 Test conditions for type C8 boilers
8.6.3.110 Test conditions for type C(10) boilers
34 8.6.3.111 Test conditions for type C(11) boilers
8.6.3.112 Test conditions for type B2, B3 boilers
8.6.3.113 Test conditions for type B5 boiler
35 8.6.101.1 Requirements
8.6.101.2 Test conditions
37 8.9.102.1 Determination of the pre-purge volume
8.9.102.2 Determination of the pre-purge time
8.9.102.3 Test for safely weaving pre-purge under safety of operation condition
38 8.11.6.1 Thermoelectric device
8.11.6.2 Automatic burner control system
39 8.11.101.1 Requirement for air proving
8.11.101.2 Air proving by supervision of the combustion air rate or the combustion products rate
40 8.11.101.3 Air proving by using gas/air ratio controls
42 8.11.101.4 Functioning of the fan of a type C4 boiler
8.12.2.1 Test description
8.12.2.2 Requirements
8.12.2.3 Test conditions
43 8.12.3.1 Incomplete combustion
8.12.3.2 Supplementary test for fan assisted boilers
8.12.3.3 Flame lift
44 8.12.3.101 Special flue conditions
46 8.16.101.1 Requirements
8.16.101.2 Test conditions
47 8.16.102.1 Nominal working combustion products temperature
8.16.102.2 Overheat combustion products temperature
8.101.2.1 Duct sections and fittings
48 8.101.2.2 Ducts support
8.101.2.3 Vertical terminals
8.101.3.1 Flexural tensile strength
8.101.3.2 Components subject to wind load
49 8.102.2.1 Characterization
8.102.2.2 Long-term resistance to thermal load
51 8.102.2.3 Long-term resistance to condensate exposure
53 8.102.2.4 Resistance to condensing/non-condensing cycling
54 8.102.2.5 Resistance to ultraviolet radiation (UV)
55 8.102.2.6 Geometrical stability
8.102.2.7 Reaction to fire
59 8.103.8.1 Durability
8.103.8.2 Strength
61 8.104.5.1 Requirements
8.104.5.2 Test methods
62 8.104.5.3 Risk assessment in case of a failing non-return valve
64 9 Useful efficiencies
10 Electric auxiliary energy
11 Risk assessment
12 Marking and instructions
12.2.1.1 General
12.2.1.2 For installation and adjustment of the gas circuit
12.2.1.3 For installation on the central heating circuit
65 12.2.1.4 For installation of the combustion circuit
70 12.2.1.5 For boilers intended to be installed in a partially protected place
Figures
83 Listing of tables and numbers
Annexes
Annexes A-V, AA, AB, AC and ZA
84 Annex X A(normative)Test apparatus for type C2 boilers
85 Annex X B(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
86 Annex X C(informative)This annex is empty on purpose
87 Annex X D(informative)Example on calculation of common duct system for type C(11) boilers
89 Annex ZA (informative)Left empty on purpose
90 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 ā€“ 400) kW
91 Annex ZC (informative)Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 813/2013 L 239/136 aimed to be covered
94 Annex ZD (informative)Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EU) No 811/2013 L 239/1 aimed to be covered
97 Annex ZE (informative)Relationship between this European Standard and the essential requirements of Regulation (EU) 2016/426 of the European Parliament and of the Council of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC aimed to be covered

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BS EN 15502-2-1:2022
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