Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions

1.1   Scope of EN 12309
Appliances covered by this European Standard include one or a combination of the following:
-   gas-fired sorption chiller;
-   gas-fired sorption chiller/heater;
-   gas-fired sorption heat pump.
This European Standard applies to appliances designed to be used for space heating or cooling or refrigeration with or without heat recovery.
This European Standard applies to appliances having flue gas systems of type B and C (according to CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air conditioners, it only applies to appliances having:
-   integral burners under the control of fully automatic burner control systems,
-   closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated,
-   mechanical means to assist transportation of the combustion air and/or the flue gas.
The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in prEN 12309 1:2012).
In the case of packaged units (consisting of several parts), this standard applies only to those designed and supplied as a complete package.
The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309.
Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.
All the symbols given in this text should be used regardless of the language used.
1.2   Scope of this Part 1 of EN 12309
This part of this European Standard specifies the terms and definitions for gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW.

Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW - Teil 1: Begriffe

1.1   Anwendungsbereich der EN 12309
Geräte nach dieser Europäischen Norm beinhalten eine oder eine Kombination der folgenden Funktionen:
-   gasbefeuertes Sorptionskühlgerät;
-   gasbefeuertes Sorptionskühl-/heizgerät;
-   gasbefeuerte Sorptionswärmepumpe.
Diese Europäischen Norm gilt ausschließlich für Geräte für die Raumheizung oder  kühlung mit oder ohne Wärmerück¬gewinnung.
Diese Europäischen Norm gilt für Geräte mit Abgassystemen der Bauarten B und C (nach CEN/TR 1749) sowie für Geräte zur Aufstellung im Freien. EN 12309 gilt nicht für Klimaanlagen, sie gilt ausschließlich für Geräte mit:
-   integrierten Brennern, gesteuert mittels Feuerungsautomaten;
-   geschlossenen Kühlkreislaufsystemen, in denen das Kühlmittel nicht direkt mit dem/der zu kühlenden oder zu erwärmenden Wasser/Sole oder Luft in Berührung kommt;
   mechanischen Einrichtungen zur Unterstützung der Verbrennungsluft- und/oder Abgasabführung.
Die vorstehenden Geräte können eine oder mehrere Primär- oder Sekundärfunktion(en) haben (d. h. Wärme-rückgewinnung — siehe Begriffe nach prEN 12309 1:2012).
Bei (aus mehreren Teilen bestehenden) Verpackungseinheiten gilt diese Norm nur, wenn diese als vollständige Baugruppe ausgelegt und geliefert werden.
EN 12309 behandelt nicht die Geräte, deren Kondensator mit Luft oder durch Verdampfung von zusätzlichem Wasser auf der Außenseite gekühlt wird.
Anlagen für Heizung und/oder Kühlung industrieller Prozesse fallen nicht in den Anwendungsbereich der EN 12309.
Alle in diesem Text angegebenen Symbole sollten unabhängig von dessen jeweiliger Sprache verwen¬det werden.
1.2   Anwendungsbereich des Teil 1 der EN 12309
Der vorliegende Teil dieser Europäischen Norm legt Begriffe für gasbefeuerte Sorptionsgeräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW fest.

Appareils à sorption fonctionnant au gaz pour le chauffage et/ou le refroidissement de débit calorifique sur PCI inférieur ou égal à 70 kW - Partie 1: Termes et définitions

Les appareils concernés par ces normes englobent les appareils suivants isolément ou en combinaison :
-   groupe refroidisseur à sorption fonctionnant au gaz ;
-   groupe refroidisseur réchauffeur à sorption fonctionnant au gaz ;
-   pompe à chaleur à sorption fonctionnant au gaz ;
Ces normes s'appliquent aux appareils utilisés uniquement pour le chauffage ou le refroidissement ou la réfrigération de locaux avec ou sans récupération de chaleur. Les appareils peuvent être des types monovalent, bivalent ou hybride.
Ces normes s'appliquent aux appareils comportant des systèmes d'évacuation des gaz de combustion de type B et C (conformément au CEN/TR 1749) et aux appareils conçus pour les installations extérieures. Ces Normes européennes s'appliquent aux appareils pouvant être à raccord simple ou double.
Ces normes ne s'appliquent qu'aux appareils comportant :
-   des brûleurs intégrés sous le contrôle de systèmes de commande automatique
-   des circuits fermés de fluide frigorigène dans lesquels le fluide frigorigène ne vient pas en contact avec l'eau ou l'air à refroidir ou à chauffer ;
-   des moyens mécaniques pour l'alimentation en air de combustion et/ou l'évacuation des produits de combustion
Les appareils ci-dessus peuvent avoir une ou plusieurs fonctions principales ou additionnelles (c'est-à-dire récupération de chaleur, voir le paragraphe Définitions) et cette norme s'applique à toutes ces sortes de fonctions pourvu que la fonction considérée dépende de la circulation de fluide (fluide frigorigène et/ou solution) dans le ou les circuits à absorption, à adsorption ou de fluide frigorigène.
NOTE 1   Il convient d'évaluer séparément les appareils dont les fonctions ne dépendent pas de la circulation du fluide dans le ou les circuits à absorption, à adsorption ou de fluide frigorigène.
Ces normes s'appliquent aux appareils destinés à être soumis à des essais de type. Les exigences pour les appareils non destinés à subir des essais de type pourraient appeler des considérations supplémentaires.
Dans le cas des appareils monobloc (constitués de plusieurs éléments), la norme ne s'applique qu'à ceux conçus et fournis sous forme d'ensemble complet.
Ces normes ne s'appliquent pas aux climatiseurs.
La présente norme ne couvre pas les appareils ayant leur condenseur refroidi par air et par évaporation d’eau d’un circuit supplémentaire externe.
Ces normes ne s’appliquent pas aux installations utilisées pour le chauffage et/ou le refroidissement des procédés industriels.
NOTE 2   Il convient d’utiliser tous les symboles spécifiés dans le présent document, quelle que soit la langue utilisée.

Absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW - 1. del: Izrazi in definicije

Področje uporabe standardov EN 12309
Naprave, zajete v standardu EN 12309, vključujejo eno ali več kombinacij naslednjih elementov:
–  absorpcijske in adsorpcijske plinske naprave za hlajenje;
–  absorpcijske in adsorpcijske plinske naprave za hlajenje/gretje;
–  absorpcijske in adsorpcijske plinske toplotne črpalke
EN 12309 se uporablja za naprave samo, kadar se uporabljajo za ogrevanje ali hlajenje z rekuperacijo toplote ali brez nje. Naprave so lahko monovalentne, dvovalentne ali hibridne.
EN 12309 se uporablja za naprave z odpadnimi plini vrste B in C (v skladu s CEN/TR 1749) in naprave, namenjene zunanji namestitvi. EN 12309 se uporablja za naprave, ki lahko imajo eno ali dve cevi.
EN 12309 se uporablja le za naprave z
–  integralnimi gorilniki s popolnoma avtomatskim sistemom kontrole,
–  hladilnimi tokokrogi z zaprtim sistemom, pri katerih hladilno sredstvo ne pride v neposreden stik z vodo ali zrakom, ki se ohlaja ali segreva,
–  mehaničnimi sredstvi za pomoč pri transportu zraka za gorenje in/ali odpadnega plina.
Zgornje naprave lahko imajo eno ali več primarnih ali sekundarnih funkcij (tj. rekuperacija toplote – glej opredelitve iz standarda prEN 12309 1:2012), pri čemer se EN 12309 uporablja za vse take funkcije, pod pogojem, da je zadevna funkcija odvisna od kroženja tekočine (hladilnega sredstva in/ali raztopine) v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine.
OPOMBA 1 Vsaka funkcija naprave, ki ni odvisna od kroženja tekočine v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine, naj bi se ocenila ločeno.
EN 12309 se uporablja za vse naprave, za katere naj bi se izvajal tipski preskus. Zahteve za naprave, za katere se ne izvaja tipski preskus, bi bilo treba dodatno proučiti.
Pri pakiranih enotah (sestavljenih iz več kosov) se EN 12309 uporablja samo za tiste, ki so projektirane in dostavljene kot celoten paket.
EN 12309 se ne uporablja za klimatske naprave.
EN 12309 ne zajema naprav, katerih kondenzator se hladi z zrakom in z izhlapevanjem zunanje dodatne vode.
Inštalacije, uporabljene za gretje in/ali hlajenje industrijskih procesov, niso zajete v standardu EN 12309.
OPOMBA 2 Vsi simboli v tem besedilu naj bi se uporabljali ne glede na uporabljen jezik. Področje uporabe tega 1. dela standarda EN 12309
Ta del standarda EN 12309 določa pogoje in opredelitve za absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW.

General Information

Status
Published
Publication Date
16-Dec-2014
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
05-May-2014

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW - Teil 1: BegriffeAppareils à sorption à chauffage direct au gaz pour chauffage et/ou refroidissement d'un débit calorifique sur PCI inférieur à 70 kW - Partie 1: Termes et définitionsGas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions91.140.30VLVWHPLVentilation and air-conditioning27.080Heat pumpsICS:Ta slovenski standard je istoveten z:EN 12309-1:2014SIST EN 12309-1:2015en,fr,de01-marec-2015SIST EN 12309-1:2015SLOVENSKI

STANDARDSIST EN 12309-2:2001SIST EN 12309-1:19991DGRPHãþD
SIST EN 12309-1:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12309-1

December 2014 ICS 27.080; 91.140.30 Supersedes EN 12309-1:1999, EN 12309-2:2000English Version

Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions

Appareils à sorption fonctionnant au gaz pour le chauffage et/ou le refroidissement de débit calorifique sur PCI inférieurou égal à 70 kW - Partie 1: Termes et définitions

Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW -Teil 1: Begriffe This European Standard was approved by CEN on 18 October 2014.

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
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12309-1:2014 ESIST EN 12309-1:2015

EN 12309-1:2014 (E) 2 Contents Page Foreword ..............................................................................................................................................................3 1 Scope ......................................................................................................................................................5 1.1 Scope of EN 12309 .................................................................................................................................5 1.2 Scope of this Part 1 of EN 12309 ..........................................................................................................5 2 Normative references ............................................................................................................................5 3 Terms and definitions ...........................................................................................................................6 3.1 Appliance and its constituents .............................................................................................................6 3.2 Combustion products circuit ............................................................................................................. 10 3.3 Adjusting, control and safety devices .............................................................................................. 10 3.4 Operation of the appliance ................................................................................................................ 12 3.5 Gases ................................................................................................................................................... 14 3.6 Conditions of operation, measurement and calculations .............................................................. 16 Bibliography ..................................................................................................................................................... 28 SIST EN 12309-1:2015

EN 12309-1:2014 (E) 3 Foreword This document (EN 12309-1:2014) has been prepared by Technical Committee CEN/TC 299 “Gas-fired sorption appliances, indirect fired sorption appliances, gas-fired endothermic engine heat pumps and domestic gas-fired washing and drying appliances”, the secretariat of which is held by UNI. 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 June 2015, and conflicting national standards shall be withdrawn at the latest by June 2015. This document supersedes EN 12309-1:1999 and EN 12309-2:2000. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This standard comprises the following parts under the general title, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW: — Part 1: Terms and definitions; — Part 2: Safety; — Part 3: Test conditions; — Part 4: Test methods; — Part 5: Requirements; — Part 6: Calculation of seasonal performances; — Part 7: Specific provisions for hybrid appliances; — Part 8: Environmental aspects. EN 12309-1 and EN 12309-2 supersede EN 12309-1:1999, whereas EN 12309-1, EN 12309-3, EN 12309-4, EN 12309-5, EN 12309-6, and EN 12309-7 supersede EN 12309-2:2000.

EN 12309-1, EN 12309-2, EN 12309-3, EN 12309-4, EN 12309-5, EN 12309-6, and EN 12309-7 have been prepared to address the essential requirements of the European Directive 2009/142/EC relating to appliances burning gaseous fuels (see prEN 12309-2:2013, Annex ZA for safety aspects and EN 12309-5:2014, Annex ZA for rational use of energy aspects). These documents are linked to the Energy Related Products Directive (2009/125/EC) in terms of tests conditions, tests methods and seasonal performances calculation methods under Mandate M/495 (see EN 12309-3:2014, Annex ZA; EN 12309-4:2014, Annex ZA; EN 12309-6:2014, Annex ZA and EN 12309-7:2014, Annex ZA and prEN 12309-2:2013, Annex ZB and EN 12309-5:2014, Annex ZB). These documents will be reviewed whenever new mandates could apply. EN 12309-8 (“Environmental aspects”) deals with the incorporation of the Resolution BT 27/2008 regarding CEN approach on addressing environmental issues in product and service standards. Compared to EN 12309-1:1999, the following modifications have been made: SIST EN 12309-1:2015

EN 12309-1:2014 (E) 4 EN 12309-1:2014 gathers terms and definitions from all the other parts of EN 12309. Moreover, new terms and definitions used in the other parts have been added and existing terms and definitions have been updated consistently to the other parts of this standard. According to the CEN-CENELEC Internal Regulations, the national standards organizations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12309-1:2015

EN 12309-1:2014 (E) 5 1 Scope 1.1 Scope of EN 12309 Appliances covered by this European Standard include one or a combination of the following: — gas-fired sorption chiller; — gas-fired sorption chiller/heater; — gas-fired sorption heat pump. This European Standard applies to appliances designed to be used for space heating or cooling or refrigeration with or without heat recovery. This European Standard applies to appliances having flue gas systems of type B and C (according to CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air conditioners, it only applies to appliances having: — integral burners under the control of fully automatic burner control systems, — closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated, — mechanical means to assist transportation of the combustion air and/or the flue gas. The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in EN 12309-1:2014). In the case of packaged units (consisting of several parts), this standard applies only to those designed and supplied as a complete package. The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309. Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309. All the symbols given in this text should be used regardless of the language used. 1.2 Scope of this Part 1 of EN 12309 This part of this European Standard specifies the terms and definitions for gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW. 2 Normative references Not applicable. SIST EN 12309-1:2015

EN 12309-1:2014 (E) 6 3 Terms and definitions 3.1 Appliance and its constituents 3.1.1 absorption process in which molecules of the refrigerant are dissolved into a liquid 3.1.2 adsorption process in which molecules of the refrigerant are held at the surface of a solid (possibly porous) structure 3.1.3 aeration adjuster device enabling the air to be set at the desired value according to the supply conditions 3.1.4 air-conditioners encased assembly or assemblies designed as an appliance to provide delivery of conditioned air to an enclosed space (room for instance) or zone Note 1 to entry: The medium used for distribution of heating and/or cooling is exclusively air. 3.1.5 appliance assembly of various parts according to the installation instructions, if the appliance is supplied to the market in multiple parts Note 1 to entry: Accessories provided optionally are not to be included. Note 2 to entry: Appliance may be supplied to be marketed in one or more than one part. 3.1.6 bivalent appliance encased assembly or assemblies designed and packaged which is made up of components that can be tested separately 3.1.7 brine liquid that has a freezing point depressed relative to water 3.1.8 chiller encased assembly or assemblies designed as an appliance, whose primary function is delivery of cooling only, and whose primary function is dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s) 3.1.9 chiller/heater encased assembly or assemblies, whose primary function is delivery of cooling and/or heating and whose primary function of cooling is dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s) Note 1 to entry: The primary function of heating only uses directly or indirectly the energy delivered by the combustion system. SIST EN 12309-1:2015

EN 12309-1:2014 (E) 7 3.1.10 closed system system in which the fluid within the refrigerant circuit (e.g. water, ammonia, etc.) providing heating or cooling does not come into contact with the surrounding air or the heat transfer medium (e.g. water, brine, air) 3.1.11 condensing appliance appliance in which, under normal operating conditions and at certain operating water temperatures, the water vapour in the combustion products is partially condensed in order to make use of the latent heat of this water vapour for heating and/or heat recovery purposes 3.1.12 ductless appliance outdoor appliance which is not designed to be fitted with external ducts to transport air to, or products of combustion away from, the appliance’s casing 3.1.13 gas circuit part of the appliance that conveys or contains the gas between the appliance gas inlet connection and the burner(s) 3.1.14 gas fired appliance which mainly consume gas for implementation of the function or functions, the electrical power consumption being dedicated to auxiliaries needed for operation 3.1.15 gas inlet connection part of the appliance intended to be connected to the gas supply 3.1.16 gas rate adjuster component allowing an authorized person to set the gas rate of the burner to a predetermined value according to the supply conditions Note 1 to entry: Adjustment may be progressive (screw adjuster) or in discrete steps (by changing restrictors). Note 2 to entry: The adjusting screw of an adjustable pressure regulator is regarded as a rate adjuster. 3.1.17 heat pump encased assembly or assemblies designed as an appliance whose primary function is delivery of heat and/or cooling (the primary function is dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s)) 3.1.18 heat recovery recovery of heat rejected by the appliance whose primary control is in the cooling mode by means of an additional heat exchanger (e.g. a chiller with an additional condenser or absorber) SIST EN 12309-1:2015

EN 12309-1:2014 (E) 8 3.1.19 heat transfer medium any medium (e.g. air, water, brine, etc.) used for the transfer of heat to or from refrigerant-containing parts of the appliance Note 1 to entry: The medium may be – the cooling medium circulating in the evaporator, – the cooling medium circulating in the condenser and/or absorber and/or flue gas heat exchanger, – the heat recovery medium circulating in the heat recovery heat exchanger. 3.1.20 hybrid appliance encased assembly or assemblies utilizing at least two different technologies whose primary function is to generate heat, including overall control system that selects, according to predefined parameters, which technology (or combination thereof) satisfies the customers' requirements while minimizing energy costs, consumption and/or carbon emissions Note 1 to entry: Hybrid appliances according to the scope of this standard are based on gas fired technologies. 3.1.21 ignition burner burner whose flame is intended to ignite another burner 3.1.22 ignition device any means (flame, electrical ignition device or other device) used to ignite the gas at the ignition burner or at the main burner Note 1 to entry: This device can operate intermittently or permanently. 3.1.23 indoor heat exchanger heat exchanger which is designed to transfer heat to the indoor part of the building or to the indoor hot water supplies or to remove heat from these Note 1 to entry: In the case of heat pumps operating in cooling mode, this is the evaporator. In the case of heat pumps operating in heating mode, this is the condenser. 3.1.24 injector component that admits the gas into a burner 3.1.25 main burner burner that is intended to assure the thermal function of the appliance and is generally called “the burner” SIST EN 12309-1:2015

EN 12309-1:2014 (E) 9 3.1.26 mechanical joint means of assuring the soundness of an assembly of several (generally metallic) parts without the use of liquids, pastes, tapes, etc. Note 1 to entry: The means are, for example: – metal to metal joints; – conical joints; – toroidal sealing rings (“O” rings); − flat joints. 3.1.27 monovalent appliance encased assembly or assemblies whose primary and secondary functions are dependent on circulation of fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s) 3.1.28 outdoor heat exchanger heat exchanger which is designed to remove heat from the outdoor ambient environment, or any other available heat source, or to transfer heat to it Note 1 to entry: In the case of heat pumps operating in cooling mode, this is the condenser. In the case of heat pumps operating in heating mode, this is the evaporator. 3.1.29 open system system in which the fluid within the refrigerant circuit (e.g. water, etc.) providing heating or cooling comes into direct contact with the heat transfer medium (e.g. water, air, etc.) which is to be heated or cooled 3.1.30 packaged unit factory assembly of components of heat pump, chiller or chiller/heater fixed on a common mounting to form a discrete unit 3.1.31 primary function main purpose for which the sorption appliance is designed Note 1 to entry: In the case of chiller, the main purpose is the cooling function; in the case of a heat pump this is the heating function. Note 2 to entry: Both the heating and cooling functions of the sorption appliance may be classed as primary functions if they satisfy the rational use of energy requirements for those functions. 3.1.32 putting an adjuster or a control out of service procedure by which a control (temperature, pressure, etc.) is put out of action and sealed in this position 3.1.33 restrictor part with an orifice, which is placed in the gas circuit so as to create a pressure drop and thus reduce the gas pressure at the burner to a predetermined value for a given supply pressure and rate SIST EN 12309-1:2015

EN 12309-1:2014 (E) 10 3.1.34 sealing an adjuster procedure by which an adjuster is set so that changing the setting of the adjuster breaks the sealing material and makes the interference with the adjuster apparent Note 1 to entry: A factory sealed adjuster is considered to be non-existent. Note 2 to entry: A regulator is considered to be non-existent if it has been factory sealed in the fully opened position. 3.1.35 secondary function optional function of the sorption appliance, such as heating or cooling, which is not expected to satisfy the rational use of energy requirements of a primary function 3.1.36 setting an adjuster procedure by which an adjuster is immobilized in a position by some means (e.g. screw) 3.1.37 sorption process that is absorption or adsorption 3.1.38 sorption appliance generic word used to describe all the appliances covered by this standard Note 1 to entry: The medium used for distribution of heating and/or cooling is liquid. 3.2 Combustion products circuit 3.2.1 combustion chamber enclosure inside which combustion of the air/gas mixture takes place 3.2.2 draught diverter device placed in the combustion products circuit to reduce the influence of flue pull and prevent down draught affecting on the burner performance and combustion 3.2.3 flue outlet part of the appliance that connects with a flue to evacuate the products of combustion 3.2.4 flue terminal device fitted at the end of the duct system that enables the discharge of flue gases and may, at the same time, allow entry of combustion air 3.3 Adjusting, control and safety devices 3.3.1 adjustable pressure regulator regulator provided with means for changing the outlet pressure setting 3.3.2 automatic burner control system system comprising at least a programming unit and all the elements of a flame detector device SIST EN 12309-1:2015

EN 12309-1:2014 (E) 11 3.3.3 automatic shut-off valve device that automatically opens, closes or varies the gas rate on a signal from the control circuit and/or the safety circuit 3.3.4 control thermostat device controlling the operation of the appliance by on/off, high/low or modulating control and enabling the temperature to be kept automatically, within a given tolerance, at a predetermined value 3.3.5 fan delay control control that starts and/or stops the air delivery fan when the temperature of the delivered air reaches a certain predetermined value 3.3.6 flame detector device device by which the presence of a flame is detected and signalled 3.3.7 flame signal signal given by the flame detector device, normally when the flame sensor senses a flame 3.3.8 flame simulation condition that occurs when the flame signal indicates the presence of a flame when in reality no flame is present 3.3.9 flame supervision device device that, in response to a signal from the flame detector, keeps the gas supply open and shuts it off in the absence of the supervised flame 3.3.10 high/low control automatic control that permits an appliance to operate either at the nominal heat input or at a fixed reduced heat input 3.3.11 modulating control automatic control by which the heat input of the appliance is adjusted continuously between the nominal heat input and a minimum value 3.3.12 overheat control device device that shuts off and locks out the gas supply before the appliance is damaged and/or before safety is put into question, and that automatically resets 3.3.13 overheat cut-off device device that shuts off and locks out the gas supply before the appliance is damaged and/or before safety is put into question, and that requires manual intervention to restore the gas supply SIST EN 12309-1:2015

EN 12309-1:2014 (E) 12 3.3.14 pressure regulator device that maintains the outlet pressure constant independent on the variations in inlet pressure and/or flow rate within defined limits Note 1 to entry: The term “regulator” is used in this case for a volume regulator. 3.3.15 program sequence of control operations determined by the programming unit involving switching on, starting up, supervising and switching off the burner 3.3.16 programming unit unit which reacts to signals from control and safety devices, gives control commands, controls the start-up sequence, supervises the burner operation and causes controlled shut-down and, if necessary, safety shut-down and lock-out Note 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in conjunction with a flame detector device. 3.3.17 range rating device component in the appliance intended to be used to adjust the heat input of the appliance, within a range of heat inputs stated in the operating instructions, to suit the actual heat requirements of the installation Note 1 to entry: This adjustment may be progressive (e.g. by use of a screw adjuster) or in discrete steps (e.g. by changing restrictors). 3.3.18 spillage monitoring system system which contains a device that automatically shuts off the gas supply to the main burner, and perhaps the ignition burner, when there is a release of combustion products from the appliance 3.3.19 temperature sensing element or sensor component that detects the temperature of the environment to be supervised or controlled 3.4 Operation of the appliance 3.4.1 automatic burner system burner system in which, when starting from the completely shut-down condition, the gas is ignited and the flame is detected and proved without manual intervention 3.4.2 automatic recycling process by which, following loss of flame signal during the running condition or accidental interruption of the operation of the appliance, the gas supply is interrupted and the complete start sequence is automatically re initiated Note 1 to entry: This process ends with the restoration of the running condition or, if there is no flame signal at the end of the safety time, or if the cause of the accidental interruption has not disappeared, with volatile lock out or non-volatile lock out. SIST EN 12309-1:2015

EN 12309-1:2014 (E) 13 3.4.3 controlled shut-down process by which the power to the gas shut off valve(s) is removed immediately, e.g. as a result of the action of a controlling function 3.4.4 extinction safety time time interval between extinction of the supervised flame and the gas supply being shut off: — to the main burner; — and/or to the ignition burner 3.4.5 first safety time interval between the instant the ignition burner gas valve, the start gas valve or main gas valve, as applicable, being energized and the instant the ignition burner gas valve, start gas valve or main gas valve, as applicable, being deenergized if the flame detector signals the absence of a flame at the end of this interval 3.4.6 flame stability characteristic of flames that remain on the burner ports or in the flame reception zone intended by the construction 3.4.7 flame lift total or partial lifting of the base of the flame away from the burner port or the flame reception zone provided by the design Note 1 to entry: Flame lift may cause the flame to blow out, i.e. extinction of the air gas mixture. 3.4.8 ignition interlock part that prevents the operation of the igniter as long as the main gasway is open 3.4.9 ignition opening time time interval between ignition of the supervised flame and the moment when the valve is held open 3.4.10 ignition safety time time that elapses between the order to open and the order to close the gas supply to the burner in the event of ignition 3.4.11 light-back entry of a flame into the body of the burner 3.4.12 non-volatile lock-out safety shut-down condition of the system, such that a restart is only accomplished by a manual reset of the system and by no other means 3.4.13 re-start interlock mechanism which prevents the re-opening of the gasway to the main burner or the main burner and the ignition burner until the armature plate has separated from the magnetic element SIST EN 12309-1:2015

EN 12309-1:2014 (E) 14 3.4.14 safety shut-down process which is effected immediately following the response of a safety limiter or sensor or the detection of a fault in the burner control system and which puts the burner out of operation by immediately removing the power to the gas shut-off valve(s) and the ignition device 3.4.15 second safety time interval between the main gas valve being energized and the main gas valve being deenergized if the flame detector signals the absence of a flame at the end of this interval Note 1 to entry: It occurs where there is a first safety time applicable to either an ignition burner or start gas flame only. 3.4.16 sooting phenomenon appearing during incomplete combustion and characterized by deposits of soot on the surfaces or parts in contact with the combustion products or with the flame 3.4.17 spark restoration process by which, after disappearance of the flame signal in the running condition, the ignition device is energized again without the gas supply having been totally interrupted ; this process ends with the restoration of the running condition or, if there is no flame signal at the end of the safety time, with volatile or non-volatile lock out 3.4.18 ignition flame flame established at the ignition rate either at the main burner or at a separate ignition burner 3.4.19 volatile lock-out safety shut down condition of the system, such that a restart is only accomplished either by the manual reset of the system, or by an interruption of the electrical supply and its subsequent restoration 3.4.20 yellow tipping yellowing of the tip of the blue cone of an aerated flame 3.5 Gases 3.5.1 calorific value quantity of heat produced by combustion at a constant pressure equal to 1 013,25 mbar, of a unit volume or mass of gas, the constituents of the combustible mixture being taken at reference conditions and the products of combustion being brought to the same conditions Note 1 to entry: A distinction is made between – the gross calorific value Hs in which the water produced by combustion is assumed to be condensed; — the net calorific value Hi in which the water produced by combustion is assumed to be in the vapour state. Note 2 to entry: The calorific value is expressed – either in megajoules per cubic metre of dry gas at the reference conditions (MJ/m3), – or in megajoules per kilogram of dry gas (MJ/kg). SIST EN 12309-1:2015

EN 12309-1:2014 (E) 15 3.5.2 gas pressure p static pressure, relative to the atmospheric pressure, measured at right angles to the direction of flow of the gas 3.5.3 limit gases test gases representative of the extreme variations in the characteristics of the gases for which appliances have been designed 3.5.4 limit pressures pressures representative of the extreme variations in the appliance supply conditions Note 1 to entry: The maximum and minimum pressures are abbreviated pmax and pmin respectively. 3.5.5 normal pressure pn pressure under which the appliances operate in normal conditions, when they are supplied with the corresponding reference gas 3.5.6 pressure couple combination of two distinct gas distribution pressures applied by reason of the significant difference existing between the Wobbe indices within a single family or group in which: — the higher pressure corresponds only to gases of low Wobbe index; — the lower pressure corresponds to gases of high Wobbe index 3.5.7 relative density d ratio of the masses of equal volumes of dry gas and dry air, under the same conditions of temperature and pressure: 15 °C and 1 013,25 mbar 3.5.8 reference conditions - for calorific values: temperature conditions of 15 °C - for gas and air volumes: dry conditions, brought to 15 °C and to an absolute pressure of 1 013,25 mbar 3.5.9 reference gases test gases with which appliances operate under nominal conditions when they are supplied at the corresponding normal pressure 3.5.10 test gases gases consisting of reference gases and limit gases, intended for the verification of the operational characteristics of appliances using combustible gases 3.5.11 test pressures gas pressures, consisting of normal and limit pressures, used to verify the operational characteristics of appliances using combustibl

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