EN 15502-1:2012
(Main)Gas-fired heating boilers - Part 1: General requirements and tests
Gas-fired heating boilers - Part 1: General requirements and tests
This European Standard specifies, the common 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”.
This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones).
This European Standard applies to boilers of types B and C, according to CEN/TR 1749:
a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437;
b) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
c) where the maximum operating pressure in the water circuit does not exceed 6 bar;
d) which can give rise to condensation under certain circumstances;
e) 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”
f) which are intended to be installed in a partially protected place;
g) which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
For applications within the scope of the PED further requirements may be necessary (e.g. situations where the maximum allowable temperature exceeds 110 °C, or where volume times maximum allowable pressure is over 50 bar r litres).
This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction shall 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 is not intended to cover appliances intended to being connected to gas grids where the quality of the distributed gas is likely to vary to a large extend over the lifetime of the appliance.
Heizkessel fur gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und Prüfungen
Diese Europäische Norm legt die allgemeinen Anforderungen und Prüfmethoden insbesondere für den Bau, die Sicherheit, die Gebrauchstauglichkeit und den Energieeinsatz sowie die Klassifizierung und Kennzeich-nung von Heizkesseln fest, die mit atmosphärischen Brennern mit oder ohne Ventilator oder mit Vormisch-brenner ausgerüstet sind und nachfolgend kurz „Kessel" “ genannt werden.
Die vorliegende Europäische Norm ist in Verbindung mit den Teilen 2 (Teil 2-1 und folgende) anzuwenden.
Die vorliegende Europäische Norm wird für Kessel des Typs B und C nach CEN/TR 1749:2009 angewandt:
a) die mit einem oder mehreren brennbaren Gasen der drei Gasfamilien mit den in EN 437 genannten Drücken betrieben werden;
b) bei denen die Temperatur der Wärme leitenden Flüssigkeit unter normalen Betriebsbedingungen 105 °C nicht überschreitet;
c) deren maximaler wasserseitiger Betriebsdruck 6 bar nicht überschreitet;
d) bei denen sich unter bestimmten Bedingungen Kondenswasser bildet;
e) die vom Hersteller als Brennwertgeräte, als Niedertemperaturkessel oder als Standardkessel bezeichnet werden. Wenn keine Angabe gemacht wird, wird der Kessel als Standardkessel betrachtet;
f) die dafür vorgesehen sind, im Gebäude oder an einer teilweise geschützten Stelle aufgestellt zu werden;
g) die dafür vorgesehen sind, nach dem Durchlaufprinzip oder nach dem Speicherprinzip Warmwasser herzustellen, wobei das Ganze als eine Einheit vertrieben wird.
Diese Europäische Norm ist für Kessel anwendbar, die für geschlossene oder offene Wassersysteme ausgelegt sind.
Diese allgemeine Norm und die speziellen Normen (siehe Teil 2) beschreiben die Anforderungen für Kessel mit bekannter Bauweise. Für Kessel mit alternativer Bauweise, die eventuell nicht vollständig durch diese oder eine spezielle Norm abgedeckt werden, bedarf das Risiko, das mit dieser alternativen Bauweise verbunden ist, einer Abschätzung.
Ein Beispiel für eine auf einer Risikoanalyse beruhenden Bewertungsmethode wird in Abschnitt 11 beschrieben.
Diese Europäische Norm ist nicht für Geräte zum Anschluss an Gasversorgungsnetze bestimmt, bei denen sich die Qualität des verteilten Gases wahrscheinlich über die Lebensdauer des Geräts stark erweitert.
Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences générales et essais
La présente Norme européenne spécifie les exigences et les méthodes d’essai communes, en particulier la conception, la sécurité, l’aptitude à la fonction, l’utilisation rationnelle de l’énergie, ainsi que la classification et le marquage concernant les chaudières de chauffage central utilisant les combustibles gazeux et dotées de brûleurs atmosphériques, de brûleurs atmosphériques assistés d’un ventilateur ou de brûleurs à pré-mélange total, ci-après dénommées « chaudières ».
La présente Norme européenne est à utiliser conjointement avec les Parties 2 spécifiques (Partie 2-1 et les suivantes).
La présente Norme européenne s’applique aux chaudières de types B et C, conformément au CEN/TR 1749 : 2009 :
a) utilisant un ou plusieurs combustibles gazeux appartenant aux trois familles de gaz et aux pressions indiquées dans l'EN 437 ;
b) dont la température du fluide caloporteur ne dépasse pas 105 °C en fonctionnement normal ;
c) dont la pression maximale de service dans le circuit d’eau ne dépasse pas 6 bar ;
d) pouvant condenser dans certaines circonstances ;
e) déclarées comme étant « chaudière à condensation » ou « chaudière à basse température » ou « chaudière standard » par le fabricant. En l’absence d’information la chaudière est considérée comme « chaudière standard » ;
f) destinées à être installées dans un bâtiment ou à un emplacement partiellement protégé ;
g) destinées à produire instantanément de l'eau chaude ou capables de la stocker, l'ensemble étant commercialisé sous forme monobloc.
La présente Norme européenne s’applique aux chaudières à circuit d’eau fermé ou ouvert.
La présente norme et les normes spécifiques (voir les Parties 2) fournissent des exigences pour les chaudières dont la construction est connue. Pour les chaudières de construction différente susceptibles de ne pas être couvertes par la présente norme ou une norme spécifique, le risque associé à cette construction différente doit être évalué.
L’Article 11 donne un exemple de méthodologie d’évaluation basée sur l’évaluation des risques.
La présente Norme européenne ne s’applique pas aux appareils destinés à être raccordés au réseau de gaz lorsque la qualité du gaz distribué peut varier de façon importante pendant la durée de vie de l’appareil.
Plinski kotli za gretje - 1. del: Splošne zahteve in preskusi
Ta evropski standard določa splošne zahteve in preskusne metode, povezane predvsem s konstrukcijo, varnostjo, ustreznostjo namenu in racionalno porabo energije ter klasifikacijo in označevanjem plinskih kotlov za centralno gretje z nameščenimi atmosferskimi gorilniki, atmosferskimi gorilniki z ventilatorjem ali gorilniki s popolnim vnaprejšnjim mešanjem, v nadaljevanju: »kotli«. Ta evropski standard je treba uporabljati v povezavi s posebnimi 2. deli (2-1. del in naslednji deli). Ta evropski standard se uporablja za kotle tipov B in C v skladu s standardom CEN/TR 1749:2009: a) ki uporabljajo enega ali več gorljivih plinov iz treh družin plinov pri tlakih, navedenih v standardu EN 437; b) kadar temperatura tekočine za prenos toplote ne presega 105 °C med običajnim delovanjem; c) kadar najvišji obratovalni tlak v vodnem omrežju ne presega 6 barov; d) ki lahko pod določenimi pogoji povzročijo kondenzacijo; e) ki so v navodilih za namestitev deklarirani kot »kondenzacijski kotli« ali »nizkotemperaturni kotli« ali »standardni kotli«. Če ni navedene deklaracije, se kotel šteje za »standardni kotel«, f) ki je namenjen vgradnji v zgradbi ali delno zaščitenem prostoru; g) ki je namenjen ogrevanju vode po takojšnjem principu ali principu shranjevanja, pri čemer se trži kot ena enota. Ta evropski standard se uporablja za kotle za zaprte vodne sisteme ali odprte vodne sisteme. Ta splošni standard in posebni standardi (glejte 2. del) določajo zahteve za kotle z znanimi konstrukcijami. V zvezi s kotli z drugačnimi konstrukcijami, ki morda niso v celoti zajeti v tem standardu ali posebnem standardu, je treba oceniti tveganje, povezano z drugačno konstrukcijo. Primer metodologije ocenjevanja, ki temelji na oceni tveganja, je naveden v točki 11. Ta evropski standard ni namenjen obravnavi aparatov za povezavo s plinskimi omrežji, v katerih bo kakovost distribuiranega plina med življenjsko dobo aparata verjetno znatno nihala.
General Information
- Status
- Withdrawn
- Publication Date
- 17-Jul-2012
- Withdrawal Date
- 20-Jan-2026
- Technical Committee
- CEN/TC 109 - Central heating boilers using gaseous fuels
- Drafting Committee
- CEN/TC 109/WG 1 - Domestic central heating boilers using gaseous fuels
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 24-Jun-2015
- Completion Date
- 21-Jan-2026
Relations
- Merged Into
EN 15502-1:2012+A1:2015 - Gas-fired heating boilers - Part 1: General requirements and tests - Effective Date
- 01-Apr-2015
- Refers
EN 10029:2010 - Hot-rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
CR 1404:1994 - Determination of emissions from appliances burning gaseous fuels during type-testing - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 15502-1:2012 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas-fired heating boilers - Part 1: General requirements and tests". This standard covers: This European Standard specifies, the common 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”. This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones). This European Standard applies to boilers of types B and C, according to CEN/TR 1749: a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437; b) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation; c) where the maximum operating pressure in the water circuit does not exceed 6 bar; d) which can give rise to condensation under certain circumstances; e) 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” f) which are intended to be installed in a partially protected place; g) which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit. This European Standard applies to boilers designed for sealed water systems or for open water systems. For applications within the scope of the PED further requirements may be necessary (e.g. situations where the maximum allowable temperature exceeds 110 °C, or where volume times maximum allowable pressure is over 50 bar r litres). This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction shall 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 is not intended to cover appliances intended to being connected to gas grids where the quality of the distributed gas is likely to vary to a large extend over the lifetime of the appliance.
This European Standard specifies, the common 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”. This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones). This European Standard applies to boilers of types B and C, according to CEN/TR 1749: a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437; b) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation; c) where the maximum operating pressure in the water circuit does not exceed 6 bar; d) which can give rise to condensation under certain circumstances; e) 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” f) which are intended to be installed in a partially protected place; g) which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit. This European Standard applies to boilers designed for sealed water systems or for open water systems. For applications within the scope of the PED further requirements may be necessary (e.g. situations where the maximum allowable temperature exceeds 110 °C, or where volume times maximum allowable pressure is over 50 bar r litres). This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction shall 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 is not intended to cover appliances intended to being connected to gas grids where the quality of the distributed gas is likely to vary to a large extend over the lifetime of the appliance.
EN 15502-1:2012 is classified under the following ICS (International Classification for Standards) categories: 27.060.30 - Boilers and heat exchangers; 91.140.10 - Central heating systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 15502-1:2012 has the following relationships with other standards: It is inter standard links to EN 15502-1:2012+A1:2015, EN 10029:2010, EN 88-1:2011, EN 1092-4:2002, EN 1092-3:2003, EN 3475-413:2002, CR 1404:1994, EN 10226-1:2004, EN 13203-1:2006, EN 125:2010, EN ISO 228-1:2003, EN ISO 4063:2010, EN 1057:2006+A1:2010, EN 126:2012, EN 13611:2007+A2:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 15502-1:2012 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 90/396/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 15502-1:2012 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Plinski kotli za gretje - 1. del: Splošne zahteve in preskusiHeizkessel fur gasformige Brennstoffe - Teil 1: Allgemeine Anforderungen und PrufungenChaudières de chauffage central utilisant les combustibles gazeux - Exigences générales et essaisGas-fired heating boilers - Part 1: General requirements and tests97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 15502-1:2012SIST EN 15502-1:2012en,fr,de01-september-2012SIST EN 15502-1:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15502-1
July 2012 ICS 27.060.30; 91.140.10 English Version
Gas-fired heating boilers - Part 1: General requirements and tests
Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences générales et essais
Heizkessel fur gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und Prüfungen This European Standard was approved by CEN on 25 May 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15502-1:2012: ESIST EN 15502-1:2012
time . 568.11Adjustment, control and safety devices . 568.12Carbon monoxide. 688.13NOx . 728.14Special provisions for boilers intended to be installed in a partially protected
place . 768.15Formation of condensate . 768.16Temperature of combustion products . 76SIST EN 15502-1:2012
partially protected places . 95Annex A(informative)
Properties of carbon and stainless steels . 102Annex B(normative)
Minimum requirements for cast iron . 103Annex C(normative)
Parts in aluminium and aluminium alloys. 104Annex D(normative)
Parts in copper or copper alloys . 105Annex E(normative)
Minimum thicknesses for rolled parts. 106Annex F(normative)
Nominal minimum thicknesses of boiler sections of cast materials
under water pressure . 107Annex G(normative)
Parameters for welded joints and welding processes . 108Annex H(informative)
Composition of the gas circuit . 113Annex I(informative)
Compilation of the test conditions for the various gas families . 122Annex J(informative)
Calculation of conversions of NOx . 124Annex K(informative)
Example of calculation of the weighting factors NOx . 125Annex L(informative)
Practical method of calibrating the test rig to enable the heat
loss Dp to be determined . 127Annex M(informative)
Means of determining the ignition time at full rate . 128Annex N(informative)
Determination of the heat losses from the test rig of the indirect
method and the contributions of the circulating pump of the test
rig. 129Annex O(informative)
Example of a risk assessment method . 130Annex P(informative)
Examples of risk assessment with a method described in Annex O133Annex Q(informative)
Realisation of a protective measure . 137Annex R(informative)
Overall classification of a basic risk. 139Annex S(informative)
Not exhaustive list of classification examples . 142Annex T(normative)
Correction for the determined efficiency in the low water
temperature test of low temperature boilers (LTB) and condensing
boilers (CB) . 144SIST EN 15502-1:2012
Use of test gases . 145Annex V(informative)
Standards intended to be replaced by this standard in
combination with the relevant part 2. 146Annex W(informative)
Alternative Method for the determination of the nominal heat
input or the maximum and minimum heat input (according to 8.4.1)
for appliances using a pneumatic gas/air ratio control system . 147Annex ZA (informative)
Clauses of this European ^tandard addressing essential
requirements or provisions of EU Directive2009/142/EC, "Directive
relating to appliances burning gaseous fuels (codified version)"
(GAD) . 148Annex ZBClauses 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 . 151Bibliography . 152 SIST EN 15502-1:2012
The basic function of gas-fired heating boiler is to generate heat by direct heat transfer in a heat exchanger, from the combustion gasses to the water. The boiler may include in one design more than one function. It may include for example: a sanitary hot water function; a function to supply the combustion air from the outside of the building; a function to dispose the combustion products to the outside of the building.
The boiler design may be supplied to the market in more than one part. If the boiler is supplied to the market in multiple parts, the boiler is the assembly of various parts according to the installation instructions. Boilers may be designed to be connected to specific parts of a building. Connection to a chimney and the means of combustion air supply is particularly relevant. This European Standard was established to deal with aspects related to: a) safety; b) rational use of energy; c) fitness for purpose. This European Standard is a first part of a series of standards that will describe the special requirements for specific boiler types. This European Standard contains the common requirements that are applicable for the majority of the specific boiler types. This European Standard is to be used in conjunction with the specific Part 2. Matters related to quality assurance systems, tests during production, and certificates of conformity of auxiliary devices are not dealt with in this series of European Standards.
a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437; b) where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
c) where the maximum operating pressure in the water circuit does not exceed 6 bar; d) which can give rise to condensation under certain circumstances; e) 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” f) which are intended to be installed inside a building or in a partially protected place; g) which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit. This European Standard applies to boilers designed for sealed water systems or for open water systems. This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction will need to be assessed.
An example of an assessment methodology, based upon risk assessment, is given in Clause 11. This European Standard is not intended to cover appliances intended for connection to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 88-1:2011, Pressure regulators and associated safety devices for gas appliances — Part 1: Pressure regulators for inlet pressures up to and including 50 kPa EN 125:2010, Flame supervision devices for gas burning appliances — Thermoelectric flame supervision devices EN 126:2012, Multifunctional controls for gas burning appliances EN 161:2011, Automatic shut-off valves for gas burners and gas appliances EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid fuels SIST EN 15502-1:2012
EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper external threads and parallel internal threads — Dimensions, tolerances and designation EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads — Part 2: Taper external threads and taper internal threads — Dimensions, tolerances and designation EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances — Part 2: Electronic types EN 13203-1:2006, Gas-fired domestic appliances producing hot water — Appliances not exceeding 70 kW heat input and 300 l water storage capacity — Part 1: Assessment of performance of hot water deliveries EN 13611:2007+A2:2011, Safety and control devices for gas burners and gas burning appliances — General requirements EN 14459:2007, Control functions in electronic systems for gas burners and gas burning appliances — Methods for classification and assessment EN 50090 (all parts), Home and Building Electronic Systems (HBES) EN 60335-1:2002, Household and similar electrical appliances — Safety — Part 1: General requirements
(IEC 60335-1:2001, modified) EN 60335-2-102:2006, Household and similar electrical appliances — Safety — Part 2-102: Particular requirements for gas, oil and solid-fuel burning appliances having electrical connections (IEC 60335-2-102:2004, modified) EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) EN 60730-2-9:2010, Automatic electrical controls for household and similar use — Part 2-9: Particular requirements for temperature sensing controls (IEC 60730-2-9:2008, modified) EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) SIST EN 15502-1:2012
(ISO 4063:2009, Corrected version 2010-03-01) ISO 857-1:1998, Welding and allied processes — Vocabulary — Part 1: Metal welding processes ISO 857-2:2005, Welding and allied processes — Vocabulary — Part 2: Soldering and brazing processes and related terms 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 437:2003+A1:2009 and the following apply. 3.1.1 Gas supply 3.1.1.1 aeration adjuster device enabling the primary aeration of a burner to be set to the desired value according to the supply conditions 3.1.1.2 gas circuit assembly of parts of the boiler that carry or contain the combustible gas between the boiler gas inlet connection and the point at which air is admitted 3.1.1.3 gas inlet connection part of the boiler intended to be connected to the gas supply 3.1.1.4 gas rate adjuster component allowing the gas rate of the burner to be brought to a predetermined value according to the supply conditions Note 1 to entry: The action of operating this device is called “adjustment of the gas rate”. 3.1.1.5 injector component that admits gas into the burner 3.1.1.6 putting an adjuster or a control device out of service action intended to put an adjuster or control (rate, pressure, etc.) out of service 3.1.1.7 range-rating device component on the boiler intended to be used by the installer to adjust the nominal heat input of the boiler within the range of maximum and minimum heat inputs stated by the manufacturer, to suit the actual heat requirements of the installation SIST EN 15502-1:2012
frost protection system system that actively protects the water in the boiler against freezing Note 1 to entry: An anti-freeze solution is not considered as an active frost protection system. 3.1.4.15 gas/air ratio control device that automatically adapts the combustion air rate to the gas rate or vice versa 3.1.4.16 ignition interlock part which prevents the operation of the igniter as long as the main gasway is open 3.1.4.17 internal soundness soundness of a closure member in the closed position and isolating an enclosure containing gas from another enclosure or from the outlet of the valve 3.1.4.18
maximum allowable working temperature temperature the material can withstand over a long period of time under working conditions SIST EN 15502-1:2012
Note 1 to entry: This definition is dedicated to this standard and its scope, but correlates in principle with the definition of EN 60730-1:2011, 2.2.8, which reads "temperature sensing control intended to keep a temperature below or above one particular value during abnormal operating conditions and which has no provision for setting by the user". 3.1.4.23 pressure regulator device which maintains the downstream pressure constant to within fixed limits independent of variations, within a given range, of the upstream pressure and the gas rate 3.1.4.24 proportional control of the domestic hot water operation means of control in which the gas rate is subordinated proportionally to the domestic hot water rate; the proportioning factor may be adjustable 3.1.4.25 recycling automatic process by which, after loss of flame during operation, the gas supply is interrupted and the full start procedure is re-initiated automatically 3.1.4.26 remote control function function providing automatic and normal operation by means of a control intended to be actuated with or without line of sight of the boiler e.g. through: a) communication lines/protocols;
b) additional hardware and/or software; c) ultra-sonic; d) infra red (IR) / radio frequency (RF) transmission; e) all kind of combinations of a) to c) via Internet using e.g. modems, portable telephones 3.1.4.27 remote control device that performs the remote control function, by wires or wireless, with or without line of sight of the boiler 3.1.4.28 remote reset device that performs a specific remote control function, being reset from lock-out to allow a restart attempt SIST EN 15502-1:2012
combustion at which at least one combustible constituent is present in significant proportions in the combustion products 3.1.7.6 light-back phenomenon characterised by the entry of a flame into the body of the burner 3.1.7.7 sooting phenomenon appearing during incomplete combustion and characterised by deposits of soot on the surfaces or parts in contact with the combustion products or with the flame 3.1.7.8 yellow tipping phenomenon characterised by the yellowing of the tip of the blue cone of an aerated flame 3.1.8 Times 3.1.8.1 extinction delay time (TIE) thermoelectric flame supervision device, the time that elapses between disappearance of the supervised flame and interruption of the gas supply 3.1.8.2 extinction safety time (TSE) time that elapses between extinction of the supervised flame and the order to shut off of the gas supply to the burner 3.1.8.3 ignition opening time (TIA) thermoelectric flame supervision device, the time that elapses between ignition of the supervised flame and the moment when the closure element is held open by the flame signal 3.1.8.4 ignition safety time (TSA) time that elapses between the order to open and the order to close the gas supply to the burner in the event of ignition not taking place 3.1.8.5 purge mechanical introduction of air into the combustion circuit in order to displace any gas/air mixture which could remain there; a distinction is made between: a) pre-purge:
the purge that takes place between the start-up command and the ignition device being energised; b) post-purge:
the purge that takes place following burner shutdown SIST EN 15502-1:2012
low temperature boiler boiler which can work continuously with a water supply temperature of 35 °C to 40 °C, producing condensation in certain circumstances
3.1.11 Installation 3.1.11.1
boilers intended to be installed in a partially protected place boilers intended to be installed in the open air, not exposed to the direct action and infiltration of rain, snow or hail Note 1 to entry: If a boiler is sold with a casing intended to provide protection, this casing is an integral part of the boiler. 3.1.11.2 minimum declared installation temperature for boilers in partially protected places minimum ambient temperature as declared by the manufacturer, at which the boiler is designed to operate and at which all materials and devices shall operate properly and safely SIST EN 15502-1:2012
Q Unit :
kilowatt (kW) 3.1.12.2 nominal heat input (Qn) value of the heat input declared by the manufacturer Symbol:
Qn Unit:
kilowatt (kW) 3.1.12.3 nominal domestic hot water heat input (Qnw) value of the heat input in the domestic hot water mode indicated by the manufacturer Symbol:
Qnw Unit:
kilowatt (kW) SIST EN 15502-1:2012
Density of test gas Density of reference gas d dr
Net Wobbe index Gross Wobbe index
Wi Ws
Normal test pressure Minimum test pressure pn pmin
Maximum test pressure Gas pressure at the meter pmax pg
Atmospheric pressure pa
Volume gas rate under test conditions Volume gas rate under reference conditions Volume gas rate, nominal V Vr Vn
Mass rate Nominal mass rate M Mn
Heat input Nominal heat input Corrected heat input Q Qn Qc
Nominal domestic hot water heat input Qnw
Useful output Nominal output Condensing output
P Pn Pnc
Useful efficiency ηu Maximum waterside operating pressure (heating water) Maximum water service pressure (sanitary water) PMS PMW
Ignition opening time Ignition safety time Extinction delay time Extinction safety time TIA TSA TIE TSE Gas temperature tg 4 Classification 4.1 Gases and categories Gases are classified into families, groups and ranges in accordance with EN 437. SIST EN 15502-1:2012
b) pressure class 2: PMS = 3 bar; c) pressure class 3: 3 bar < PMS <
6 bar. 5 Construction 5.1 General Except where otherwise stated, the constructional requirements are verified by inspection of the boiler and tank where incorporated and its technical documents.
For boilers intended to be installed
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