Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions

1.1   Scope of FprEN 16905 series
This European Standard specifies the requirements, test methods and test conditions for the rating and performance calculation of air conditioners and heat pumps using either air, water or brine as heat transfer media, with gas-fired endothermic engine driven compressors when used for space heating, cooling and refrigeration, hereafter referred to as "GEHP appliance".
This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions.
This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437.
This European Standard only applies to appliances having:
a)   gas fired endothermic engines under the control of fully automatic control systems;
b)   closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated;
c)   where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation;
d)   where the maximum operating pressure in the:
1)   heating water circuit (if installed) does not exceed 6 bar
2)   domestic hot water circuit (if installed) does not exceed 10 bar.
This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery.
The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard.
Packaged units, single split and multisplit systems are covered by this European Standard. Single duct and double duct units are covered by this European Standard.
The above appliances can have one or more primary or secondary functions.
This European Standard is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration.
In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package.
NOTE   All the symbols given in this text are used regardless of the language used.
1.2   Scope of FprEN 16905-1
This part of FprEN 16905 series specifies the terms and definitions of gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery.

Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 1: Begriffe

1.1   Anwendungsbereich der Normenreihe prEN 16905
Diese Europäische Norm legt die Anforderungen, Prüfverfahren und Prüfbedingungen für die Bewertung und Leistungsberechnung von Luftkonditionierern und Wärmepumpen mit gasbefeuerten endothermischen motor-getriebenen Verdichtern fest, die entweder Luft, Wasser oder Sole als Wärmeübertragungsmedium verwenden und zur Heizung, Kühlung und Kältetechnik dienen, nachfolgend als "GEHP-Gerät" bezeichnet.
Diese Europäische Norm gilt ausschließlich für Geräte mit einer maximalen Wärmebelastung von 70 kW (bezogen auf den Heizwert [NCV; en: net calorific value]) bei Norm Nennbedingungen.
Diese Europäische Norm gilt entsprechend der EN 437 ausschließlich für Geräte der folgenden Kategorien: I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P und II2Er3P.
Diese Europäische Norm gilt ausschließlich für Geräte mit:
-   endothermischen Gasmotoren, die durch vollständig automatisierte Regelungen gesteuert werden;
-   geschlossenen Kühlkreislaufsystemen, in denen das Kühlmittel nicht direkt mit der zu kühlenden oder zu erwärmenden Fluid in Berührung kommt;
-   einer Temperatur des Wärmeübertragungsmediums im Heizsystem (Heizwasserkreis), die im normalen Betrieb 105 °C nicht überschreitet:
-   einem höchsten Betriebsdruck im
-   Heizungswasserkreislauf (falls installiert), der 6 bar nicht überschreitet;
-    Trinkwasserkreislauf (falls installiert), der 10 bar nicht überschreitet.
Diese Europäische Norm gilt ausschließlich für Geräte, die zur Raumbeheizung oder  kühlung oder zur Kälteerzeugung mit oder ohne Wärmerückgewinnung angewendet werden.
In dieser Europäischen Norm werden keine Geräte behandelt, deren Kondensator mit Luft oder durch Verdampfung von zusätzlichem Wasser auf der Außenseite gekühlt wird.
In dieser Europäischen Norm werden Systeme, Single Split  und Multi Split Systeme behandelt. Auch Einkanal  und Zweikanal Einheiten werden in der vorliegenden Europäischen Norm behandelt.
Die vorstehend aufgeführten Geräte können eine oder mehrere Primär  oder Sekundärfunktion(en) haben.
Diese Europäische Norm gilt für Geräte, die einer Typprüfung zu unterziehen sind. Anforderungen an nicht typgeprüfte Geräte sollten ein Thema für weitere Überlegungen sein.
Bei (aus mehreren Teilen bestehenden) Verpackungseinheiten gilt die vorliegende Europäische Norm nur, wenn diese Einheiten als vollständige Baugruppe ausgelegt und geliefert werden.
ANMERKUNG   Sämtliche in diesem Text verwendeten Symbole werden unabhängig von der jeweilig verwendeten Sprache angewendet.
1.2   Anwendungsbereich der prEN 16905-1
Dieser Teil der prEN 16905 legt Begriffe für gasbefeuerte endothermische Motor Wärmepumpen fest, die für den Heiz  und/oder Kühlbetrieb unter Einbeziehung von Wärmerückgewinnung vorgesehen sind.

Pompes à chaleur à moteur endothermique alimenté en gaz - Partie 1 : Termes et définitions

1.1   Domaine d'application de la série prEN 16905
La présente Norme européenne spécifie les exigences, les méthodes d'essai et les conditions d'essai applicables aux calculs des caractéristiques et des performances des climatiseurs et pompes à chaleur utilisant de l'air, de l'eau ou de l'eau glycolée comme fluide caloporteur, munis de compresseurs à moteur endothermique alimenté au gaz, et destinés à des applications de chauffage, de refroidissement et de réfrigération de locaux (ci-après désignés par l'appellation « appareils GEHP »).
Cette norme s'applique uniquement aux appareils dont le débit calorifique maximal (dérivé du pouvoir calorifique inférieur) ne dépasse pas 70 kW dans les conditions de performance nominale.
Elle se limite également aux appareils classés dans les catégories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P et II2Er3P de l'EN 437.
Cette norme ne s'applique qu'aux appareils :
-   équipés de moteurs endothermiques alimentés au gaz régulés par des systèmes de régulation entièrement automatisés ;
-   comportant des circuits fermés de réfrigérant dans lesquels le réfrigérant n'entre pas en contact direct avec le fluide à refroidir ou à chauffer ;
-   dans lesquels la température du fluide caloporteur du système de chauffage (circuit d'eau de chauffage) ne dépasse pas 105 °C dans les conditions normales de fonctionnement ;
-   dans lesquels la pression maximale de fonctionnement
-   ne dépasse pas 6 bar dans le circuit d'eau de chauffage (le cas échéant) et
-   ne dépasse pas 10 bar dans le circuit d'eau chaude sanitaire (le cas échéant).
Cette norme s'applique aux appareils utilisés uniquement pour le chauffage de locaux, le refroidissement de locaux ou la réfrigération, avec ou sans récupération de chaleur.
Elle ne couvre pas les appareils dont le condenseur est refroidi par air et par évaporation de l'eau d'un circuit supplémentaire externe.
Cette norme couvre les systèmes autonomes, mono-split et multi-split. Les installations à simple conduit et à double conduit entrent également dans son domaine d'application.
Les appareils ci-dessus peuvent assurer une ou plusieurs fonctions principales ou secondaires.
Cette norme s'applique aux appareils destinés à être soumis à des essais de type. Les exigences relatives aux appareils non soumis à des essais de type pourraient appeler des considérations supplémentaires.
Dans le cas des appareils autonomes (constitués de plusieurs éléments), la norme ne s'applique qu'aux appareils conçus et fournis sous forme d'ensemble complet.
NOTE   Il faut employer tous les symboles spécifiés dans le présent document, quelle que soit la langue utilisée.
1.2   Domaine d'application de la présente Partie 1 de la série prEN 16905-1
La présente partie de la norme prEN 16905 spécifie les termes et définitions applicables aux pompes à chaleur à moteur endothermique alimenté au gaz utilisées en mode chauffage et/ou refroidissement, y compris la récupération de chaleur du moteur.

Toplotna črpalka s plinsko gnanim motorjem z notranjim zgorevanjem - 1. del: Izrazi in definicije

Ta evropski standard določa zahteve, preskusne metode in preskusne pogoje za ocenjevanje in izračun zmogljivosti klimatskih naprav in toplotnih črpalk, ki uporabljajo zrak, vodo ali slanico kot medij za prenos toplote, s kompresorji s plinsko gnanim motorjem z notranjim zgorevanjem, kadar se uporabljajo za segrevanje, ohlajanje in hlajenje, v nadaljevanju »naprava GEHP«.
Ta evropski standard se uporablja samo za naprave z največjo grelno močjo (na podlagi neto kalorične vrednosti), ki ne presega 70 kW pri standardnih pogojih za določanje moči.
Ta evropski standard se uporablja samo za naprave iz kategorij I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P in II2Er3P v skladu s standardom EN 437.
Ta evropski standard se uporablja samo za naprave:
– s plinsko gnanimi motorji z notranjim zgorevanjem, ki jih nadzirajo povsem samodejni krmilni sistemi;
– s hladilnimi tokokrogi z zaprtim sistemom, pri katerih hladilno sredstvo ne pride v neposreden stik s tekočino, ki se ohlaja ali segreva;
– pri katerih temperatura tekočine za prenos toplote ogrevalnega sistema (ogrevalno vodovodno omrežje) pri običajnem delovanju ne presega 105 °C;
– pri katerih najvišji obratovalni tlak v:
– ogrevalnem vodovodnem omrežju (če je nameščeno) ne presega 6 barov;
– gospodinjskem ogrevalnem vodovodnem omrežju (če je nameščeno) ne presega 10 barov.
Ta evropski standard se uporablja za naprave samo, če se uporablja za segrevanje, ohlajanje ali hlajenje prostora z rekuperacijo toplote ali brez nje.
Ta evropski standard ne zajema naprav, katerih kondenzator se hladi z zrakom in izhlapevanjem zunanje dodatne vode.
Ta evropski standard zajema pakirane enote in sisteme z enim ali več razcepi. Ta evropski standard zajema enote z enojnim in dvojnim vodom.
Zgornje naprave imajo lahko eno ali več primarnih ali sekundarnih funkcij.
Ta evropski standard se uporablja za vse naprave, za katere se izvaja 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 ta evropski standard uporablja samo za tiste, ki so projektirane in dostavljene kot celoten paket.
OPOMBA Vsi simboli v tem besedilu se uporabljajo ne glede na uporabljeni jezik.

General Information

Status
Published
Publication Date
07-Mar-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
08-Mar-2017
Completion Date
08-Mar-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 1: BegriffePompes à chaleur à moteur endothermique alimenté au gaz - Partie 1 : Termes et définitionsGas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions27.080Heat pumpsICS:Ta slovenski standard je istoveten z:EN 16905-1:2017SIST EN 16905-1:2018en,fr,de01-januar-2018SIST EN 16905-1:2018SLOVENSKI

STANDARD
SIST EN 16905-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16905-1
March
t r s y ICS
r sä r v rä t yâ
t yä r z r English Version
Gasæfired endothermic engine driven heat pumps æ Part

sã Terms and definitions Pompes à chaleur à moteur endothermique alimenté au gaz æ Partie

s ã Termes et définitions
Gasbefeuerte endothermische MotoræWärmepumpen æ Teil
sã Begriffe This European Standard was approved by CEN on
{ January
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x { r wæ sã t r s y ESIST EN 16905-1:2018

EN 16905-1:2017 (E) 2 Contents Page European foreword ....................................................................................................................................................... 3 1 Scope .................................................................................................................................................................... 4 1.1 Scope of EN 16905 series .............................................................................................................................. 4 1.2 Scope of EN 16905-1 ....................................................................................................................................... 4 2 Normative references .................................................................................................................................... 4 3 Terms and definitions ................................................................................................................................... 5 4 Denomination ................................................................................................................................................ 24 Bibliography ................................................................................................................................................................. 25 Index................................................................................................................................................................................ 26

SIST EN 16905-1:2018

EN 16905-1:2017 (E) 3 European foreword This document (EN 16905-1:2017) 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 September 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. 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 standard comprises the following parts under the general title, Gas-fired endothermic engine driven heat pumps: — Part 1: Terms and definitions; — Part 2: Safety (WI 00299025; currently in preparation); — Part 3: Test conditions; — Part 4: Test methods; — Part 5: Calculation of seasonal performances in heating and cooling mode. EN 16905-1, prEN 16905-2, EN 16905-3, EN 16905-4 and EN 16905-5 have been prepared to address the essential requirements of the European Directive 2009/142/EC relating to appliances burning gaseous fuels (see prEN 16905-2:201X, Annex ZA for safety aspects and EN 16905-5:2017, 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/535; (see EN 16905-3:2017, Annex ZA, EN 16905-4:2017, Annex ZA, EN 16905-5:2017, Annex ZA and prEN 16905-2:201X, Annex ZB). These documents will be reviewed whenever new mandates could apply. 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. SIST EN 16905-1:2018

EN 16905-1:2017 (E) 4 1 Scope 1.1 Scope of EN 16905 series This European Standard specifies the requirements, test methods and test conditions for the rating and performance calculation of air conditioners and heat pumps using either air, water or brine as heat transfer media, with gas-fired endothermic engine driven compressors when used for space heating, cooling and refrigeration, hereafter referred to as “GEHP appliance”. This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions. This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437. This European Standard only applies to appliances having: a) gas fired endothermic engines under the control of fully automatic control systems; b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated; c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation; d) where the maximum operating pressure in the: 1) heating water circuit (if installed) does not exceed 6 bar 2) domestic hot water circuit (if installed) does not exceed 10 bar. This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery. The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard. Packaged units, single split and multisplit systems are covered by this European Standard. Single duct and double duct units are covered by this European Standard. The above appliances can have one or more primary or secondary functions. This European Standard is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration. In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package. NOTE All the symbols given in this text are used regardless of the language used. 1.2 Scope of EN 16905-1 This part of EN 16905 series specifies the terms and definitions of gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery. 2 Normative references Not applicable. SIST EN 16905-1:2018

EN 16905-1:2017 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Appliance and its constituents: 3.1.1 air conditioner encased assembly or assemblies designed as a unit to provide delivery of conditioned air to an enclosed space (room for instance) or zone Note 1 to entry: It includes a refrigeration system for cooling and possibly dehumidifying the air. Note 2 to entry: It can have means for heating, circulating, cleaning and humidifying the air. If the unit provides heating by reversing the refrigerating cycle, then it is a heat pump. 3.1.2 close control air conditioner air conditioner to satisfy the requirements of the process carried out in the air conditioned room 3.1.3 control cabinet air conditioner air conditioner to satisfy the requirements of the control cabinet 3.1.4 double-duct air conditioner air conditioner in which, during cooling or heating, the condenser (or evaporator) intake air is introduced from the outdoor environment to the unit by a duct and rejected to the outdoor environment by a second duct, and which is placed wholly inside the place to be conditioned, near a wall 3.1.5 engine heat recovery recovery of residual heat energy from the engine by means of a heat exchanger 3.1.6 engine heat recovery heat exchanger heat exchanger assembly which is designed to transfer the residual heat energy to the engine heat recovery medium 3.1.7 exhaust air air from the air conditioned space entering the outdoor heat exchanger 3.1.8 brine heat transfer medium that has a freezing point lower than the freezing point of water 3.1.9 gas carrying circuit assembly of parts of the GEHP appliance that carry or contain supplied gas or process gas Note 1 to entry: This circuit includes the gas circuit. SIST EN 16905-1:2018

EN 16905-1:2017 (E) 6 3.1.10 gas circuit assembly of parts of the GEHP appliance that carry or contain the supplied gas between the gas inlet connection and the outlet of the safety shut-off valves 3.1.11 gas inlet connection part of the GEHP appliance intended to be connected to the gas supply 3.1.12 gas rate adjuster component allowing the gas rate of a gas mixture equipment 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”. Note 2 to entry: E.g. gas mixer. 3.1.13 GEHP appliance gas-fired endothermic engine driven heat pump 3.1.14 heat pump encased assembly or assemblies designed as a unit to provide delivery of heat Note 1 to entry: It includes a refrigeration system for heating. Note 2 to entry: It can have means for cooling, circulating, cleaning and dehumidifying the air. The cooling is by means of reversing the refrigerating cycle. 3.1.15 heat recovery recovery of heat rejected by the unit whose primary control is in the cooling mode by means of either an additional heat exchanger (e.g. a liquid chiller with an additional condenser) or by transferring the heat through the refrigerating system for use by units whose primary control remains in heating mode (e.g. variable refrigerant flow with simultaneous cooling and heating operation) 3.1.16 heat recovery heat exchanger heat exchanger assembly which is designed to transfer heat to the heat recovery medium 3.1.17 heat transfer medium medium (water, air …) used for the transfer of the heat without changing the state 3.1.18 ignition device means (e.g. electrical, etc.) used to ignite the gas admitted to the internal combustion engine SIST EN 16905-1:2018

EN 16905-1:2017 (E) 7 3.1.19 indoor heat exchanger heat exchanger which is designed to transfer heat between the refrigerant and the indoor heat transfer medium Note 1 to entry: In the case of an air conditioner operating in the cooling mode, this is the evaporator. In the case of an air conditioner operating in heating mode, this is the condenser. Note 2 to entry: In case the indoor heat transfer is water or brine, the indoor heat exchanger is also placeable at outdoor. 3.1.20 injector component that admits gas into an internal combustion engine 3.1.21 internal combustion engine mechanism delivering shaft power by the combustion of fuel in one or more cylinders in which working pistons reciprocate 3.1.22 outdoor heat exchanger heat exchanger which is designed to transfer heat between any available heat source and the refrigerant Note 1 to entry: In the case of an air conditioner operating in the cooling mode, this is the condenser. In the case of an air conditioner operating in heating mode, this is the evaporator. 3.1.23 primary function main purpose for which the GEHP appliance is designed Note 1 to entry: Both the heating and cooling functions of the GEHP appliance are classed as primary functions if they satisfy the rational use of energy requirements for those functions. 3.1.24 range-rating device component on the GEHP appliance intended to be used by the installer to adjust the nominal heat input (value of the heat input at standard rating condition) of the GEHP appliance within the range of maximum and minimum heat inputs stated in the technical specifications/instructions, to suit the actual heat requirements of the installation 3.1.25 recycled air air from the air conditioned space entering the indoor heat exchanger 3.1.26 sealing an adjuster or control device arrangements made to make evident any attempt to change the set adjustment (e.g. breakage of the device or the sealing material) Note 1 to entry: A sealed adjuster or control device is considered to be non-existent SIST EN 16905-1:2018

EN 16905-1:2017 (E) 8 3.1.27 secondary function optional function of the GEHP appliance, such as heating or cooling, which is not expected to satisfy the rational use of energy requirements of a primary function 3.1.28 single-duct air conditioner air conditioner in which, during cooling or heating, the condenser (or evaporator) intake air is introduced from the space containing the unit and discharged outside this space 3.1.29 water loop closed circuit of water maintained with a temperature range on which the units in cooling mode reject heat and the units in heating mode take heat 3.2 Combustion products circuit: 3.2.1 air supply and combustion products evacuation ducts means for transporting combustion air to the internal combustion engine and the combustion products to the terminal or fitting piece Note 1 to entry: It is necessary to distinguish between: — completely surrounded ducts: the combustion products evacuation duct is surrounded by combustion air throughout its length, — separate ducts: the combustion products evacuation duct and the combustion air supply duct are neither concentric nor completely surrounded ducts. 3.2.2 backflow valve valve to prevent flue gas backflow 3.2.3 combustion chamber enclosure inside which combustion of the air-gas mixture takes place 3.2.4 combustion circuit circuit including the air supply duct and the combustion products circuit 3.2.5 combustion products circuit circuit including the combustion chamber, the heat exchanger, the combustion products evacuation duct and either the fitting piece or the connection to the terminal, if any 3.2.6 terminal part of the combustion circuit fitted external to the building which has the function of the air supply inlet and/or combustion products outlet of the appliance SIST EN 16905-1:2018

EN 16905-1:2017 (E) 9 3.2.7 terminal guard device that protects the terminal from physical damage from outside influences 3.3 Adjusting, monitoring, control and safety devices: 3.3.1 adjustable pressure regulator pressure regulator fitted with a means of adjusting the downstream pressure Note 1 to entry: This means is considered as an “adjusting device”. 3.3.2 adjustable control thermostat control thermostat that permits the user to obtain setting temperatures between a minimum and a maximum value 3.3.3 air proving device device intended to cause safety shutdown in the event of abnormal conditions of air admission or of combustion products evacuation 3.3.4 automatic engine control system system that comprises a programming unit and the combustion detection function Note 1 to entry: All the functions of an automatic control system are assembled in one or more housings. 3.3.5 automatic shut-off valve device that automatically opens, closes or varies a rate on a signal from the engine control system Note 1 to entry: Automatic valves are classified in accordance with EN 161 into classes A, B, C, D and J. 3.3.6 breather hole orifice that allows atmospheric pressure to be maintained in a compartment of variable volume 3.3.7 closure member movable part of the valve or the thermoelectric device that opens, varies or shuts off the gas path 3.3.8 control knob component intended to be moved by hand in order to act on an appliance control (e.g. tap, thermostat, etc.) 3.3.9 control thermostat device enabling the water temperature to be kept automatically within a given range at a predetermined value SIST EN 16905-1:2018

EN 16905-1:2017 (E) 10 3.3.10 diaphragm flexible component that operates a valve by means of a force resulting from a pressure difference 3.3.11 external soundness soundness, with respect to the atmosphere, of an enclosure containing gas 3.3.12 fault tolerating time time between the occurrence of a fault and the shut-down of the internal combustion engine which is tolerated by the application without creating a hazardous situation 3.3.13 gas/air ratio control device that automatically adapts the combustion air rate to the gas rate or vice versa 3.3.14 frost protection system system that actively protects the water in the GEHP appliance against freezing Note 1 to entry: An anti-freeze solution is not considered as an active frost protective system. 3.3.15 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 3.3.16 limit thermostat device that causes a shut off of the gas supply when a limit value of the temperature is reached, and automatically enables a new start-up sequence when the temperature returns below the fixed limit 3.3.17 maximum allowable working temperature temperature that the material can withstand over a long period of time under working condition 3.3.18 multifunctional control device which has two or more controls and/or control function(s) whereby the functional parts cannot operate if separated 3.3.19 overheat cut-off device device that causes safety shutdown and non-volatile lockout before the GEHP appliance is damaged and/or before safety is put in question 3.3.20 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 SIST EN 16905-1:2018

EN 16905-1:2017 (E) 11 3.3.21 programme sequence of control operations determined by the programming unit, involving switching on, supervising and switching off the internal combustion engine 3.3.22 programming unit device that reacts to impulses from control and safety systems, gives control commands, controls the start-up programme, supervises the internal combustion engine operation and causes controlled shutdown, safety shutdown or lockout, if necessary and follows a predetermined sequence of actions operating in conjunction with a combustion detection device 3.3.23 remote control device that performs the remote control function by wires or wireless connection, with or without line of sight of the GEHP appliance 3.3.24 remote control function function that provides automatic and normal operation by means of a control intended to be actuated with or without line of sight of the GEHP appliance, e.g. through: a) communication lines/protocols, b) additional hardware and/or software, c) ultra-sonic, d) infrared (IR)/radio frequency (RF) transmission, e) all kind of combinations of a) to c) via the internet, e.g. modems, portable telephones 3.3.25 remote reset device that performs a specific remote control function, being reset from lock-out to allow a restart attempt 3.3.26 safety temperature limiter device that causes safety shutdown and non-volatile lockout so as to prevent a gas or a water temperature exceeding a preset limit 3.4 Operation of the GEHP appliance: 3.4.1 complete combustion combustion with no more than traces of combustible constituents (hydrogen, hydrocarbons, carbon monoxide, carbon etc.) in the combustion products 3.4.2 condensing operation mode of the flue system operation mode where, under normal operation conditions, condensate is produced in the combustion products SIST EN 16905-1:2018

EN 16905-1:2017 (E) 12 3.4.3 controlled shutdown process by which a control device (on the GEHP appliance or external to it) causes the gas supply to the internal combustion engine to be stopped immediately; the GEHP appliance returns to its start position 3.4.4 domestic hot water DHW water delivered by the GEHP appliance, raised to a certain temperature in order to use it for domestic needs, e.g. kitchen, bathroom, etc 3.4.5 extinction safety time TSe time that elapses between extinction of the supervised flame and the order to shut off the gas supply to internal combustion engine 3.4.6 heat input Q quantity of energy used in unit time corresponding to the volumetric or mass flow rates, the calorific value used being either the net or gross calorific value Note 1 to entry: The heat input is expressed in kilowatt (kW). 3.4.7 incomplete combustion combustion at which at least one combustible constituent is present in significant proportions in the combustion products 3.4.8 internal cooling circuit loop in which a fluid circulates intended to maintain the various elements of the GEHP appliance at their operating temperature 3.4.9 locking out complete interruption of the gas supply with lockout 3.4.10 maximum water service pressure maximum pressure permitted in the domestic water circuit of combinations GEHP appliance, as stated in the appliance instructions 3.4.11 nominal electrical frequency frequency stated in the technical specifications/ instructions at which the GEHP appliance can operate normally 3.4.12 nominal voltage voltage or range of voltages stated in the technical specifications/instructions at which the GEHP appliance can operate normally SIST EN 16905-1:2018

EN 16905-1:2017 (E) 13 3.4.13 non-volatile lockout shutdown condition such that a restart can only be accomplished by a manual reset 3.4.14 pre-purge time period during which pre-purge takes place 3.4.15 purge mechanical introduction of air into the combustion circuit in order to displace any gas/air mixture, which could remain there Note 1 to entry: A distinction is made between: — pre-purge: the purge that takes place between the start command and the ignition device being energized, — post-purge: the purge that is carried out after burner shutdown. 3.4.16 recycling automatic process by which, after loss of combustion during operation, the gas supply is interrupted and the full start procedure is re-initiated automatically 3.4.17 safety shutdown process which is effected immediately following the response of a protection device or the detection of a fault and puts the internal combustion engine out of operation such as to maintain a safe condition and avoid damage to the GEHP appliance, and through which the resulting state of the system is defined by deactivated terminals for the shut-off valves and the ignition device 3.4.18 start action which causes the GEHP appliance to leave its prestart operation allowing the predetermined programme to commence 3.4.19 equivalent engine speed Erpmequivalent weighted average of the engine speed used for the measurement of NOx 3.5 Gases: 3.5.1 calorific value quantity of heat produced by the complete 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 back to the same conditions Note 1 to entry: A distinction is made between: — the gross calorific value Hs: the water produced by combustion is assumed to be condensed, — the net calorific value Hi: the water produced by combustion is assumed to be in the vapour state. SIST EN 16905-1:2018

EN 16905-1:2017 (E) 14 Note 2 to entry: The calorific value is expressed: — either in megajoules per cubic metre (MJ/m3) of dry gas under the reference conditions, — in megajoules per kilogram (MJ/kg) of dry gas. 3.5.2 gas pressure static pressure of the moving gas, relative to the atmospheric pressure, measured at right angles to the direction of the flow of the gas Note 1 to entry: Symbol: p. The gas pressures used are expressed in millibars (mbar) 1 mbar = 102 Pa. 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 maximum pressure: pmax; minimum pressure: pmin pressures representative of the extreme variations in the appliance supply conditions 3.5.5 normal pressure pn pressure under which the appliances operate in nominal conditions (condition used to obtain the values of the rating plate) 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 gas 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 reference gases test gases with which appliances operate under nominal conditions (condition used to obtain the values of the rating plate) when they are supplied at the corresponding normal pressure 3.5.8 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 or 0 °C and 1 013,25 mbar 3.5.9 test gases gases which are intended for the verification of the operational characteristics of gas appliances and which consist of reference gases and limit gases SIST EN 16905-1:2018

EN 16905-1:2017 (E) 15 3.5.10 test pressure gas pressures used to verify the operational characteristics of gas appliances, consisting of normal and limit pressures 3.5.11 Wobbe index gross Wobbe index: Ws; net Wobbe index: Wi ratio of the calorific value of a gas per unit volume to the square root of its relative density under the same reference conditions; it is said to be gross or net according to whether the calorific value used is the gross or net calorific value Note 1 to entry: The Wobbe index is expressed: — either in megajoules per cubic metre (MJ/m3) of dry gas under reference conditions, — or in megajoules per kilogram (MJ/kg) of dry gas. 3.6 Conditions of operation, measurement and calculations: 3.6.1 active mode mode corresponding to the hours with a cooling or heating load of the building and whereby the cooling or heating function is switched on 3.6.2 application rating condition rating condition which provides additional information on the performance of the appliance within its operation range when applicable 3.6.3 auxiliary energy factor in cooling mode AEFc cooling capacity to effective electrical power input ratio Note 1 to entry: The auxiliary energy factor in cooling mode is expressed in kilowatt/ kilowatt (kW/kW). 3.6.4 auxiliary energy factor in heating mode AEFh heating capacity to effective electrical power input ratio Note 1 to entry: The auxiliary energy factor in heating mode is expressed in kilowatt/ kilowatt (kW/kW). 3.6.5 bin hours hj sum of all hours occurring at a given temperature for a specific location Note 1 to entry: The number is rounded to a whole number and is derived from representative weather data over the 1982–1999 period. Note 2 to entry: For the reference heating seasons the specific locations are Strasbourg (average), Helsinki (colder) and Athens (warmer). SIST EN 16905-1:2018

EN 16905-1:2017 (E) 16 3.6.6 bivalent temperature Tbivalent lowest outdoor temperature at which the heating load is equal to the appliance declared capacity Note 1 to entry: The bivalent temperature is expressed in °C. 3.6.7 correction for engine heat recovery Cdevice_hr capacity or electric power input correction due to the device(s) (fan(s) or pump(s)) responsible for circulation the heat transfer medium through the engine heat recovery heat exchanger, in kilowatt Note 1 to entry: The correction for engine heat recovery is expressed in kilowatt (kW). 3.6.8 correction for indoors units Cdevice_indoor capacity or electric power input correction due to the device(s) (fan(s) or pump(s)) responsible for circulation the heat transfer medium through the indoor heat exchanger, in kilowatt Note 1 to entry: The correction for indoor units expressed in kilowatt (kW). 3.6.9 correction for outdoors units Cdevice_outdoor capacity or electric power input correction due to the device(s) (fan(s) or pump(s)) responsible for circulation the heat tra

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