SIST EN 303-1:2017
(Main)Heating boilers - Part 1: Heating boilers with forced draught burners - Terminology, general requirements, testing and marking
Heating boilers - Part 1: Heating boilers with forced draught burners - Terminology, general requirements, testing and marking
This European Standard applies to standard boilers and low temperature boilers with forced draught burners with a nominal heat output not exceeding 1 000 kW, which are operated either with negative pressure (natural draught boilers) or with positive pressure (pressurised boiler) in the combustion chamber, in accordance with the boiler manufacturer’s instruction.
This standard specifies the necessary terminology, the requirements on the materials and testing of them, and marking requirements for heating boilers.
Particular requirements for boilers which can be used with open vented systems are contained in EN 303 4.
The requirements of this standard apply to heating boilers which are tested on an authorised test rig.
Boilers in accordance with this standard are designed for the heating of central heating installations in which the heat carrier is water, and the maximum allowable operating temperature of which is restricted to 100 °C. The maximum allowable operating pressure is 8 bar.
For boilers with a built in or attached water heater (storage or continuous flow heater) this standard only applies to the parts of the water heater which are necessarily subject to the operating conditions of the heating boiler (heating part).
This standard does not apply to gas boilers with atmospheric burners, boilers for solid fuels, oil or gas fired condensing boilers and boilers with oil vaporisation burners. For these boilers there are further requirements.
Heizkessel - Teil 1: Heizkessel mit Gebläsebrenner - Begriffe, Allgemeine Anforderungen, Prüfung und Kennzeichnung
Diese Europäische Norm gilt für Kessel von Zentralheizungen (Heizkessel) mit Gebläsebrennern bis zu einer Nennwärmeleistung von 1 000 kW, die nach den Festlegungen des Kesselherstellers entweder mit Unterdruck (Naturzugkessel) oder mit Überdruck (Überdruckkessel) im Brennraum betrieben werden.
Diese Norm legt die notwendigen Begriffe sowie die Anforderungen an Werkstoffe, Prüfungen und Kennzeichnungen für Heizkessel fest.
Für Heizkessel, die in offenen Heizungsanlagen betrieben werden, gilt EN 303-4.
Die Anforderungen dieser Norm gelten für Heizkessel, die auf einem zugelassenen Prüfstand geprüft werden.
Heizkessel in Übereinstimmung mit dieser Norm sind für die Beheizung von zentralen Heizungsanlagen bestimmt, deren Wärmeträger Wasser mit einer maximal zulässigen Betriebstemperatur von 100°C ist. Der maximal zulässige Betriebsdruck ist 8 bar.
Diese Norm gilt nur für die Bauelemente von Heizkesseln und Wassererwärmern (Speicher- oder Durchlaufwassererwärmer), die den Betriebsbedingungen des Heizkessels zwangsläufig unterworfen sind (Heizungsteil).
Die Norm gilt nicht für Gasheizkessel mit atmosphärischen Brennern, Heizkessel für feste Brennstoffe und Heizkessel mit Ölverdampfungsbrennern. Für diese Kessel sind andere Anforderungen zu erfüllen.
Chaudières de chauffage - Partie 1 : Chaudières avec brûleurs à air soufflé - Terminologie, prescriptions générales, essais et marquage
La présente Norme européenne s'applique aux chaudières de chauffage central (chaudières de chauffage) équipées de brûleurs à air soufflé d'une puissance utile nominale inférieure ou égale à 1 000 kW, fonctionnant soit en dépression (chaudières à tirage naturel), soit en pression (chaudières pressurisées) dans la chambre de combustion, selon les indications du fabricant de la chaudière.
La présente norme spécifie la terminologie nécessaire, les exigences relatives aux matériaux et aux essais qui s'y rapportent, ainsi que les exigences de marquage pour les chaudières de chauffage.
Pour les chaudières qui peuvent être utilisées avec un vase d’expansion ouvert, les exigences particulières de construction sont précisées dans l'EN 303-4.
Les exigences de la présente norme s'appliquent aux chaudières de chauffage soumises à essai sur un banc d'essai agréé.
Les chaudières conformes à la présente norme sont conçues pour le chauffage d'installations de chauffage central dont le fluide caloporteur est l'eau et dont la température de fonctionnement maximale autorisée est limitée à 100 °C. La pression de service maximale autorisée est de 8 bar.
Pour les chaudières mixtes et les chauffe-eau (dispositif de chauffage à accumulation ou à production instantanée), la présente norme s'applique uniquement aux éléments qui sont nécessairement soumis aux conditions de fonctionnement de la chaudière de chauffage (partie chauffage).
La présente norme ne s'applique pas aux chaudières à gaz à brûleur atmosphérique, aux chaudières pour combustibles solides, ni aux chaudières à brûleur fioul à caléfaction. Ces chaudières sont soumises à d'autres exigences.
Kotli za gretje - 1. del: Kotli z ventilatorskimi gorilniki - Terminologija, splošne zahteve, preskušanje in označevanje
Ta evropski standard se uporablja za standardne kotle in nizkotemperaturne kotle z ventilatorskimi gorilniki z nazivno izhodno toploto, ki ne presega 1000 kW, ki delujejo bodisi z negativnim tlakom (kotli na naraven vlek) bodisi s pozitivnim tlakom (kotli pod tlakom) v zgorevalni komori, v skladu z navodili proizvajalca kotla. Ta standard določa potrebno terminologijo, zahteve glede materialov in njihovo preskušanje ter zahteve glede označevanja kotlov za gretje. Posebne zahteve za kotle, ki jih je mogoče uporabljati z odprtimi prezračevalnimi sistemi, so v standardu EN 303-4. Zahteve tega standarda veljajo za grelne kotle, ki se preskušajo na pooblaščeni napravi za preskušanje. Kotli za gretje v skladu s tem standardom so namenjeni za gretje v sistemih centralnega ogrevanja, pri čemer toploto prenaša voda. Najvišja dovoljena obratovalna temperatura je 100 °C, najvišji dovoljen obratovalni tlak pa 8 barov. V zvezi s kotli z vgrajenim ali pritrjenim (termoakumulacijskim ali pretočnim) grelnikom vode se ta standard uporablja le za tiste dele grelnika vode, za katere obvezno veljajo obratovalni pogoji kotla za gretje (grelni del). Ta standard se ne uporablja za plinske kotle z atmosferskimi gorilniki, kotle na trda goriva, kondenzacijske kotle na nafto ali plin in kotle z oljnimi uparjalniki. Za te kotle veljajo še dodatne zahteve.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 303-1:2017
01-december-2017
1DGRPHãþD
SIST EN 15034:2007
SIST EN 15034:2007/AC:2008
SIST EN 303-1:1999
SIST EN 303-1:1999/A1:2004
.RWOL]DJUHWMHGHO.RWOL]YHQWLODWRUVNLPLJRULOQLNL7HUPLQRORJLMDVSORãQH
]DKWHYHSUHVNXãDQMHLQR]QDþHYDQMHHeating boilers - Part 1: Heating boilers with forced draught burners - Terminology,
general requirements, testing and markingHeizkessel - Teil 1: Heizkessel mit Gebläsebrenner - Begriffe, Allgemeine
Anforderungen, Prüfung und Kennzeichnung
Chaudières de chauffage - Partie 1 : Chaudières avec brûleurs à air soufflé -
Terminologie, prescriptions générales, essais et marquage
Ta slovenski standard je istoveten z: EN 303-1:2017
ICS:
01.040.91 Gradbeni materiali in gradnja Construction materials and
(Slovarji) building (Vocabularies)
27.060.01 Gorilniki in grelniki vode na Burners and boilers in
splošno general
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
SIST EN 303-1:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------SIST EN 303-1:2017
---------------------- Page: 2 ----------------------
SIST EN 303-1:2017
EN 303-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 91.140.10 Supersedes EN 15034:2006, EN 303-1:1999
English Version
Heating boilers - Part 1: Heating boilers with forced
draught burners - Terminology, general requirements,
testing and marking
Chaudières de chauffage - Partie 1 : Chaudières avec Heizkessel - Teil 1: Heizkessel mit Gebläsebrennern -
brûleurs à air soufflé - Terminologie, prescriptions Begriffe, Allgemeine Anforderungen, Prüfung und
générales, essais et marquage KennzeichnungThis European Standard was approved by CEN on 26 June 2017.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 303-1:2017 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
SIST EN 303-1:2017
EN 303-1:2017 (E)
Contents Page
European foreword ....................................................................................................................................................... 4
1 Scope .................................................................................................................................................................... 5
2 Normative references .................................................................................................................................... 5
3 Terms and definitions, units and symbols ............................................................................................. 7
3.1 Terms and definitions ................................................................................................................................... 7
3.2 Units and symbols ........................................................................................................................................ 10
3.2.1 Units .................................................................................................................................................................. 10
3.2.2 Symbols ............................................................................................................................................................ 11
4 Requirements ................................................................................................................................................ 11
4.1 Construction requirements ...................................................................................................................... 11
4.1.1 General requirements ................................................................................................................................ 11
4.1.2 Specific requirements ................................................................................................................................. 23
4.2 Operational requirements ........................................................................................................................ 25
4.2.1 General ............................................................................................................................................................. 25
4.2.2 Verification of the nominal condensing output ................................................................................ 25
4.2.3 Formation of condensation ...................................................................................................................... 25
4.2.4 Temperature of combustion products ................................................................................................. 25
4.2.5 Surface temperature ................................................................................................................................... 25
4.2.6 Water side resistance of the boiler ........................................................................................................ 26
4.2.7 Soundness of the boiler .............................................................................................................................. 26
4.2.8 Temperature sensing control type TR and temperature sensing control type STB ............ 26
4.3 Electrical equipment ................................................................................................................................... 26
4.3.1 Electrical safety ............................................................................................................................................. 26
4.3.2 Electromagnetic compatibility ................................................................................................................ 27
5 Tests .................................................................................................................................................................. 27
5.1 General ............................................................................................................................................................. 27
5.2 Boilers of steel or non-ferrous metal .................................................................................................... 27
5.2.1 Tests to be carried out before production .......................................................................................... 27
5.2.2 Factory production control (FPC) for steel boilers .......................................................................... 27
5.3 Boilers of cast iron or non-ferrous metals .......................................................................................... 28
5.3.1 Test to be carried out before production ............................................................................................ 28
5.3.2 Test during production .............................................................................................................................. 28
5.4 Test for gas soundness ............................................................................................................................... 29
5.5 Water side resistance measurement .................................................................................................... 29
5.5.1 General ............................................................................................................................................................. 29
5.5.2 Test rig for the establishment of the water side resistance ......................................................... 29
5.6 Additional tests for low temperatures boilers .................................................................................. 31
5.6.1 Additional tests by using of corrosion resistant coatings ............................................................. 31
5.6.2 Additional tests for oil-fired low temperatures boilers ................................................................. 31
6 Marking ............................................................................................................................................................ 31
6.1 Information on the boiler data plate ..................................................................................................... 31
6.2 Requirements of the data plate ............................................................................................................... 31
7 Technical documentation, scope of supply ......................................................................................... 31
7.1 General ............................................................................................................................................................. 31
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EN 303-1:2017 (E)
7.2 Technical information (product fiche) and installation instructions ....................................... 31
7.3 Operating instructions ................................................................................................................................ 33
7.4 Label .................................................................................................................................................................. 33
Annex A (informative) Conformity evaluation ................................................................................................ 34
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No [813/2013] aimed to be covered .......... 35
Annex ZB (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No [811/2013] aimed to be covered .......... 36
Bibliography ................................................................................................................................................................. 37
---------------------- Page: 5 ----------------------SIST EN 303-1:2017
EN 303-1:2017 (E)
European foreword
This document (EN 303-1:2017) has been prepared by Technical Committee CEN/TC 57 “Central
heating boilers”, the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2018, and conflicting national standards shall
be withdrawn at the latest by March 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate M/534 and M/535 given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive(s).For relationship with EU Directive(s), see informative Annex ZA and Annex ZB, which are integral parts
of this document.This document supersedes EN 303-1:1999 and EN 15034:2006.
The following essential changes have been made:
a) Construction requirements were adopted from EN 15034;
b) Terminology of EU-Regulations 811/2013 and 813/2013 adopted;
c) the document was completely revised technically;
d) the document was completely revised editorially.
The following structure is intended for the European Standards for heating boilers:
— EN 303-1, Heating boilers — Part 1: Heating boilers with forced draught burners — Terminology,
general requirements, testing and marking— EN 303-2, Heating boilers — Part 2: Heating boilers with forced draught burners — Special
requirements for boilers with atomizing oil burners— EN 303-3, Heating boilers — Part 3: Gas fired central heating boilers — Assembly comprising a boiler
body and a forced draught burner— EN 303-4, Heating boilers — Part 4: Heating boilers with forced draught burners — Special
requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum
operating pressure of 3 bar — Terminology, special requirements, testing and marking
— EN 303-5, Heating boilers — Part 5: Heating boilers for solid fuels, hand and automatically fired, with
a nominal heat output of up to 300 kW — Terminology, requirements, testing and marking
— EN 304, Heating boilers — Test code for heating boilers for atomizing oil burners
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.---------------------- Page: 6 ----------------------
SIST EN 303-1:2017
EN 303-1:2017 (E)
1 Scope
This European Standard applies to boilers used for central heating (heating boilers) with forced
draught burners with a nominal heat output not exceeding 1 000 kW, which are operated either with
negative pressure (natural draught boilers) or with positive pressure (pressurized boiler) in the
combustion chamber, in accordance with the boiler instructions.This European Standard specifies the necessary terminology, the requirements on the materials and
testing of them, and marking requirements for heating boilers.Particular requirements for boilers that can be used with open vented systems are contained in
EN 303-4.The requirements of this standard apply to heating boilers that are tested on an authorized test rig.
Boilers in accordance with this standard are designed for the heating of central heating installations in
which the heat carrier is water, and the maximum allowable operating temperature of which is
restricted to 100 °C. The maximum allowable operating pressure is 8 bar.For boilers and water heaters (storage or continuous flow heater) this standard only applies to the
parts which are necessarily subject to the operating conditions of the heating boiler (heating part).
This standard does not apply to gas boilers with atmospheric burners, boilers for solid fuels, boilers
with oil vaporization burners. For these boilers there are further requirements.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 226:1987, Atomizing oil burners - Connecting dimensions between burners and heat generators
EN 303-2:2017, Heating boilers - Part 2: Heating boilers with forced draught burners - Special
requirements for boilers with atomizing oil burnersEN 303-4:1999, Heating boilers - Part 4: Heating boilers with forced draught burners - Special
requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum
operating pressure of 3 bar - Terminology, special requirements, testing and marking
EN 304:2017, Heating boilers - Test code for heating boilers for atomizing oil burners
EN 10025-2:2004, Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-
alloy structural steelsEN 10027-2:2015, Designation systems for steels - Part 2: Numerical system
EN 10028-2:2017, Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels
with specified elevated temperature propertiesEN 10028-3:2017, Flat products made of steels for pressure purposes - Part 3: Weldable fine grain steels,
normalizedEN 10029:2010, Hot-rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape
EN 10088-2:2014, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of
corrosion resisting steels for general purposes---------------------- Page: 7 ----------------------
SIST EN 303-1:2017
EN 303-1:2017 (E)
EN 10204:2004, Metallic products - Types of inspection documents
EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements - Part 1:
Classification using data from reaction to fire testsEN 14597:2012, Temperature control devices and temperature limiters for heat generating systems
EN 60335-1:2012, Safety of household and similar electrical appliances — Part 1: General requirements
(IEC 60335-1:2010)EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN 60730-1:2011, Automatic electrical controls for household and similar use - Part 1: General
requirements (IEC 60730:2010), modifiedEN 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), modifiedEN 61000-6-2:2005, Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for
industrial environments (IEC 61000-6-2:2005)EN 61000-6-3:2007, Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission
standard for residential, commercial and light-industrial environments (IEC 61000-6-3:2006)
EN 60335-2-102:2016, 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 + A1:2008, modified + A2:2012, modified)EN ISO 4063:2010, Welding and allied processes - Nomenclature of processes and reference numbers (ISO
4063:2009)EN ISO 6506 (all parts), Metallic materials - Brinell hardness test
EN ISO 9606-1:2013, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012
including Cor 1:2012)EN ISO 9606-2:2004, Qualification test of welders - Fusion welding - Part 2: Aluminium and aluminium
alloys (ISO 9606-2:2004)EN ISO/IEC 17025:2005, General requirements for the competence of testing and calibration laboratories
(ISO/IEC 17025:2005)ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions,
tolerances and designationISO 7-2:2000, Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by
means of limit gaugesISO 185:2005, Grey cast irons - Classification
ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads — Part 1:
Dimensions, tolerances and designation---------------------- Page: 8 ----------------------
SIST EN 303-1:2017
EN 303-1:2017 (E)
ISO 228-2:1987, Pipe threads where pressure-tight joints are not made on the threads — Part 2:
Verification by means of limit gaugesISO 857-2:2005, Welding and allied processes — Vocabulary — Part 2: Soldering and brazing processes
and related termsISO 2553:2013, Welding and allied processes - Symbolic representation on drawings - Welded joints
ISO 7005-1:2011, Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems
ISO 7005-2:1988, Metallic flanges — Part 2: Cast iron flangesISO 7005-3:1988, Metallic flanges — Part 3: Copper alloy and composite flanges
3 Terms and definitions, units and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
operating pressure
maximum allowable pressure at which the boiler is to be normally operated
Note 1 to entry: The operating pressure is less than the test pressure and the type test pressure.
3.1.2test pressure
pressure to which all boilers and their parts are subjected during production
3.1.3
type test pressure
pressure to which the pre-production heating boiler(s) and associated parts are subjected before start
of mass production in the manufacturing works3.1.4
operating temperature
maximum allowable temperature at which the boiler can be operated under normal operating
conditions at the maximum setting of the boiler’s water temperature controller3.1.5
heat output
amount of heat transferred to the heat carrier (water) per unit of time
3.1.6
heat output range
span between the minimal and the maximal heat output over which the boiler meets the requirements
of this standard and over which it can be used, whether it is a range rated or a modulating boiler
3.1.7nominal heat output
continuous output in accordance with the requirements of this standard
Note 1 to entry: The nominal heat output is equal to the rated heat output P4 according to EU Regulation
813/2013.---------------------- Page: 9 ----------------------
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EN 303-1:2017 (E)
3.1.8
heat input
amount of heat in unit time which is supplied to the furnace of the heating boiler by the fuel based on its
net calorific value3.1.9
boiler efficiency
ratio of the heat output (P) to the heat input (Q ) supplied by the fuel
Note 1 to entry: η is equal to η4 according to EU Regulation 813/2013, if P is equal to 100 % P full load .
( )Note 2 to entry: η is equal to η1 according to EU Regulation 813/2013, if P is equal to 0,3 × P .
3.1.10draught
pressure differential between the static air pressure in the place of installation and the static pressure
of the exhaust gases, as measured in the exhaust gas measuring section, which is required for correct
operation of the boiler at nominal output3.1.11
flue gas resistance
pressure differential between the combustion chamber and the boiler exit
3.1.12
combustion circuit
comprises all components between air inlet and flue gas outlet of boiler which may include the air
supply device, the burner, the combustion chamber, the heat exchanger and the flue gas evacuation
device3.1.13
soundness of the boiler
limited leakage of the combustion circuit
3.1.14
flue gas temperature
dfg
temperature measured at the outlet of the boiler
3.1.15
flue gas loss
quantity of heat per unit time lost at the flue gas exit of the boiler
3.1.16
water side resistance
pressure loss across the boiler measured at the flow and return connections of the boiler, with a volume
flow corresponding to the nominal heat output---------------------- Page: 10 ----------------------
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EN 303-1:2017 (E)
3.1.17
condensate
liquid formed from the combustion products during the condensation process
3.1.18
standard boiler
boiler for which the average water temperature can be restricted by design
3.1.19
low temperature boiler
boiler which can work continuously with a water return temperature of 35 ° to 40 °C or lower, possibly
producing condensation in certain circumstances without impairing the boiler’s operation and without
necessity of condensate drainageNote 1 to entry: No nozzle for condensate drainage intended.
3.1.20
condensing boiler
boiler that, under normal operating conditions and at certain operating water temperatures, partially
condenses the water vapour in the combustion products in order to make use of the latent heat of water
vapour for heating purposesNote 1 to entry: Always with nozzle for condensate drainage.
3.1.21
electrical power consumption at rated output
max
auxiliary electricalpower consumption at full load, expressed in kW
3.1.22
electrical power consumption at part load
min
auxiliary electrical power consumption at part load, expressed in kW
3.1.23
Electrical power consumption at standby
auxiliary electrical power consumption of a heater in standby mode, expressed in kW
3.1.24seasonal space heating energy efficiency in active mode
son
weighted average of the useful efficiency at rated heat output and the useful efficiency at 30 % of the
rated heat output, expressed in %[SOURCE: EU Regulation 813/2013 Annex I, Definition 11]
3.1.25
seasonal space heating energy efficiency
ratio between the space heating demand for a designated heating season, supplied by a heater and the
annual energy consumption required to meet this demand, expressed in %[SOURCE: EU Regulation 813/2013, §2 (20)]
---------------------- Page: 11 ----------------------
SIST EN 303-1:2017
EN 303-1:2017 (E)
Note 1 to entry: Weighted average of the useful efficiency at rated heat output and the useful efficiency at 30 %
of the rated heat output, expressed in % corrected with respect to control, the electrical consumption, the standby
heat loss and the pilot consumption if any.3.1.26
temperature sensing control type TR
thermostat or modulating thermostat used in heat generating systems for controlling the temperature
of liquid or/and gaseous media, which has provisions for setting by the user and which, if equipped
with an electrical output, provides at least type 1B actionNote 1 to entry: See 2.2.4 and 2.2.6 of EN 60730–1:2011 and see 2.2.105 of EN 60730–2-9:2010.
3.1.27temperature sensing control type STB
safety temperature limiter (thermal cut out, protective control) for heat generating systems which can
only be reset manually or by a tool and which provides at least the actions according to EN 14597
Note 1 to entry: Type 2K action will be considered to be provided if type 2N action is provided.
Note 2 to entry: Actions according to EN 14597: type 2B, type 2K, type 2P and type 2V and optionally any of the
following actions: type 2F and type 2N; the settings of this control are unchangeably fixed or can be fixed with a
tool or a special tool.3.1.28
nominal condensing output
cond
value of useful output, in kW and corresponding to the operation of the boiler in a 50 °C/30 °C water
temperature regime[SOURCE: EN 15034:2006, definition 3.2]
3.2 Units and symbols
3.2.1 Units
The unit system applied in this standard is the SI system, cf. ISO 80000-1 and others.
The following units and their multiples are used:Length m (metre);
mm (millimetre);
Mass kg (kilogram);
Power kW (kilowatt);
Efficiency η (percent);
Other units applied:
Temperature °C (degrees Celsius).
---------------------- Page: 12 ----------------------
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EN 303-1:2017 (E)
3.2.2 Symbols
Table 1 — Symbols
Symbol Name Unit
P heat output kW
P nominal heat output kW
Q heat input kW
η boiler efficiency %
T exit flue gas temperature °C
dfg
el electrical power consumption at rated output kW
max
el electrical power consumption at part load kW
min
P electrical power consumption at standby kW
η seasonal space heating energy efficiency in %
son
active mode
η seasonal space heating energy efficiency %
P nominal condensing output kW
cond
4 Requirements
4.1 Construction requirements
4.1.1 General requirements
4.1.1.1 Introduction
Boilers shall be fire-resistant and safe to operate. They shall be made of non-combustible materials and
shall be resistant to deformation and shall be such that:— they can withstand the stresses arising during normal operation;
— the burner and the boiler cannot become heated to create a hazard;
— dangerous accumulations of combustible gases (fuels mixed with air) in the combustion chamber
and in the flues are prevented; and— gases cannot leak from the boiler in dangerous quantities.
Combustible materials are allowable for:
— components of accessories, e.g. burner covers, if the parts are fitted outside of the boiler;
— internal components of controls and safety equipment;— operating handles;
— electrical equipment;
— thermal insulation (see 4.1.1.6.9); all materials containing asbestos are forbidden.
---------------------- Page: 13 ----------------------SIST EN 303-1:2017
EN 303-1:2017 (E)
Component parts of covers, operating, control and safety devices and electrical accessories shall be
arranged in such a way that their surface temperatures, under steady-state conditions, do not exceed
those specified either by the technical documentation or in the component part standard.
The materials for the parts subject to pressure shall be in accordance with generally accepted technical
requirements. They shall be suitable for the purpose and treatment intended. The mechanical and
physical properties as well as the chemical composition of the materials shall be guaranteed by the
relevant material producer/supplier.All parts of the heating boiler likely to come into contact with
...
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