EN 16905-1:2023

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

1.1   Scope of the EN 16905 series
This part of EN 16905 specifies the terms and definitions for the rating and performance calculation of gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery, to be used outdoor.
This European Standard specifies the terms and definitions.
This European Standard is to be used in conjunction with the following standards:
a)   FprEN 16905-2:2022 on safety;
b)   EN 16905-3:2017 on test conditions;
c)   prEN 16905-4:2022 on the requirements, test conditions and test methods;
d)   FprEN 16905‐5:2022 on the calculation of seasonal performances in heating and cooling mode;
e)   the heat pump standards, EN 14511‐2, EN 14511-3 and EN 14825.
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:
f)   gas fired endothermic engines under the control of fully automatic control systems;
g)   closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated;
h)   where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation;
i)   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 GEHP appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery.
This European Standard is applicable to GEHP appliances that are intended to be type tested. Requirements for GEHP appliances that are not type tested would need to be subject to further consideration.

Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 1: Begriffe

Dieser Teil der Normenreihe EN 16905 legt die Begriffe und Definitionen für die Bewertung und Leistungsberechnung von gasbefeuerten endothermischen Motor Wärmepumpen für den Heiz  und/oder Kühlbetrieb einschließlich der Motor Wärmerückgewinnung zur Anwendung im Freien fest.
Dieses Dokument legt die Begriffe und Definitionen fest.
Dieses Dokument ist zu Anwendung in Zusammenhang mit den folgenden Normen vorgesehen:
—   EN 16905 2:—  über Sicherheit;
—   EN 16905 3:—  über Prüfbedingungen;
—   EN 16905 4:—  über die Anforderungen, Prüfbedingungen und Prüfverfahren;
—   EN 16905‐5:2022 über die Berechnung der saisonalen Effizienzkennzahlen im Heiz  und Kühlmodus;
—   den Wärmepumpennormen EN 14511‐2, EN 14511 3 und EN 14825.
Dieses Dokument gilt ausschließlich für Geräte mit einer maximalen Wärmebelastung von 70 kW (bezogen auf den Heizwert (NCV; en: net calorific value)) bei Norm Nennbedingungen.
Dieses Dokument gilt entsprechend 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.
Dieses Dokument gilt ausschließlich für Geräte
a)   mit endothermischen Gasmotoren, die durch vollständig automatisierte Regelungen gesteuert werden;
b)   mit geschlossenen Kühlkreislaufsystemen, in denen das Kühlmittel nicht direkt mit der zu kühlenden oder zu erwärmenden Flüssigkeit in Berührung kommt;
c)   mit einer Temperatur des Wärmeübertragungsmediums im Heizsystem (Heizungswasserkreislauf), die im Normalbetrieb 105 °C nicht überschreitet;
d)   mit einem höchsten Betriebsdruck im
1)   Heizungswasserkreislauf (falls installiert), der 6 bar nicht überschreitet;
2)   Warmwasserbereitungskreislauf für Nutzwasser (falls installiert), der 10 bar nicht überschreitet.
Dieses Dokument gilt ausschließlich für GEHP Systeme, die zur Raumheizung oder  kühlung oder zur Kälteerzeugung mit oder ohne Wärmerückgewinnung angewendet werden.
Dieses Dokument gilt für GEHP Systeme, die einer Typprüfung zu unterziehen sind. Anforderungen an nicht typgeprüfte GEHP Systeme wären ein Thema für weitere Überlegungen.

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

La présente partie de l'EN 16905 spécifie les termes et définitions relatifs aux calculs des caractéristiques et des performances des pompes à chaleur à moteur endothermique alimenté au gaz pour le mode chauffage et/ou refroidissement, y compris la récupération de chaleur du moteur, qui doivent être utilisées en extérieur.
La présente Norme européenne spécifie les termes et définitions.
La présente Norme européenne est à utiliser conjointement avec les normes suivantes :
- EN 16905-2 relative à la sécurité ;
- EN 16905-3 relative aux conditions d'essai ;
- EN 16905-4 relative aux exigences, aux conditions d'essai et aux méthodes d'essai ;
- EN 16905‐5 relative au calcul des performances saisonnières en modes chauffage et refroidissement ;
- les normes relatives aux pompes à chaleur, EN 14511‐2, EN 14511-3 et EN 14825.
La présente Norme européenne 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.
La présente Norme européenne 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.
La présente Norme européenne norme ne s'applique qu'aux appareils :
a)   équipés de moteurs endothermiques alimentés au gaz régulés par des systèmes de régulation entièrement automatisés ;
b)   comportant des circuits fermés de réfrigérant dans lesquels le réfrigérant n'entre pas en contact direct avec le fluide à refroidir ou à chauffer ;
c)   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 ;
d)   dans lesquels la pression maximale de fonctionnement :
1)   ne dépasse pas 6 bar dans le circuit d'eau de chauffage (le cas échéant) ; et
2)   ne dépasse pas 10 bar dans le circuit d'eau chaude sanitaire (le cas échéant).
La présente Norme européenne s'applique aux appareils GEHP utilisés uniquement pour le chauffage de locaux, le refroidissement de locaux ou la réfrigération, avec ou sans récupération de chaleur.
La présente Norme européenne s'applique aux appareils GEHP destinés à être soumis à des essais de type. Les exigences relatives aux appareils GEHP non soumis à des essais de type pourraient être assujetties à des considérations supplémentaires.

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

Ta del skupine standardov EN 16905 določa izraze in definicije za ocenjevanje ter izračun zmogljivosti
toplotnih črpalk s plinsko gnanim motorjem z notranjim zgorevanjem za ogrevanje in/ali hlajenje,
vključno z rekuperacijo toplote motorja, ki so namenjene zunanji uporabi.
Ta dokument določa izraze in definicije.
Ta dokument je predviden za uporabo z naslednjimi standardi:
– EN 16905-2 (varnost);
– EN 16905-3 (preskusni pogoji);
– EN 16905-4 (zahteve, preskusni pogoji in preskusne metode);
– EN 16905‐5:2022 (izračun sezonske zmogljivosti za ogrevanje in hlajenje);
– EN 14511‐2, EN 14511-3 in EN 14825 (toplotna črpalka).
Ta dokument se uporablja samo za naprave z največjo grelno močjo (glede na neto kalorično vrednost), ki ne
presega 70 kW pri standardnih pogojih za določanje moči.
Ta dokument 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 dokument se uporablja samo za naprave:
a) s plinsko gnanimi motorji z notranjim zgorevanjem, ki jih nadzirajo povsem samodejni krmilni sistemi;
b) s hladilnimi tokokrogi z zaprtim sistemom, pri katerih hladilno sredstvo ne pride v neposreden stik
s tekočino, ki se ohlaja ali segreva;
c) pri katerih temperatura tekočine za prenos toplote ogrevalnega sistema (ogrevalno vodno omrežje)
pri običajnem delovanju ne presega 105 °C;
d) pri katerih najvišji obratovalni tlak v:
1) ogrevalnem vodnem omrežju (če je nameščeno) ne presega 6 barov,
2) gospodinjskem ogrevalnem vodnem omrežju (če je nameščeno) ne presega 10 barov.
Ta dokument se uporablja za naprave GEHP samo, če se uporabljajo za ogrevanje ali hlajenje prostora ali za
hlajenje z rekuperacijo toplote ali brez nje.
Ta dokument se uporablja za naprave GEHP, predvidene za tipski preskus. Zahteve za
naprave GEHP, za katere se ne izvaja tipski preskus, bi bilo treba dodatno proučiti.

General Information

• Status: Published
• Publication Date: 24-Oct-2023
• ICS: 01.040.27 - Energy and heat transfer engineering (Vocabularies)
• ICS: 27.080 - Heat pumps
• Technical Committee: CEN/TC 299 - Gas-fired sorption appliances and domestic gas-fired washing and drying appliances
• Drafting Committee: CEN/TC 299/WG 3 - Gas-fired endothermic engine heat pumps
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Oct-2023
• Due Date: 10-May-2024
• Completion Date: 25-Oct-2023
• Directive: 2009/125/EC - Directive 2005/32/EC of the European Parliament and of the Council of 6 July 2005 establishing a framework for the setting of ecodesign requirements for energy-using products and amending Council Directive 92/42/EEC and Directives 96/57/EC and 2000/55/EC of the European Parliament and of the Council
• Ref Project: SIST EN 16905-1:2024 - Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions

Relations

• Replaces: EN 16905-1:2017 - Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions
• Effective Date: 23-May-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Nadomešča:
SIST EN 16905-1:2018
Toplotna črpalka s plinsko gnanim motorjem z notranjim zgorevanjem - 1. del:
Izrazi in definicije
Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions
Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 1: Begriffe
Pompes à chaleur à moteur endothermique alimenté en gaz - Partie 1 : Termes et
définitions
Ta slovenski standard je istoveten z: EN 16905-1:2023
ICS:
01.040.27 Prenos energije in toplote Energy and heat transfer
(Slovarji) engineering (Vocabularies)
27.080 Toplotne črpalke Heat pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16905-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 01.040.27; 27.080 Supersedes EN 16905-1:2017
English Version
Gas-fired endothermic engine driven heat pumps - Part 1:
Terms and definitions
Pompes à chaleur à moteur endothermique alimenté Gasbefeuerte endothermische Motor-Wärmepumpen -
au gaz - Partie 1 : Termes et définitions Teil 1: Begriffe
This European Standard was approved by CEN on 11 September 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16905-1:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 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, monitoring, control and safety devices . 10
3.4 Operation of the GEHP appliance . 13
3.5 Gases . 16
3.6 Conditions of operation, measurement and calculations . 17
4 Denomination. 41
Bibliography . 42
Index . 43

European foreword
This document (EN 16905-1:2023) 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 April 2024 and conflicting national standards shall be
withdrawn at the latest by April 2024.
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 supersedes EN 16905-1:2017.
The main changes compared to the previous edition are listed below:
— new definitions added in 3.1, 3.4, 3.5 and 3.6;
— modifications of existing definitions in 3.6.
The EN 16905 series comprises the following parts under the general title Gas-fired endothermic engine
driven heat pumps:
— Part 1: Terms and definitions;
— Part 2: Safety;
— Part 3: Test conditions;
— Part 4: Test methods;
— Part 5: Calculation of seasonal performances in heating and cooling mode.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
The GEHP appliances having their condenser cooled by air and by the evaporation of external additional
water are not covered by this document.
Single split and multisplit systems are covered by this document.
The GEHP appliances can have one or more primary or secondary functions.
This document specifies the requirements, test methods and test conditions concerning, in particular,
the construction, safety, fitness for purpose, and rational use of energy, 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 document has been prepared to address the definitions used in all parts of the EN 16905 series.
1 2 3
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 16905-2:— ,
2 3
Annexes ZB and ZC, EN 16905-3:— , Annex ZA, EN 16905-4:— , Annex ZA and EN 16905-5:2022,
Annex ZA).
These documents will be reviewed whenever new mandates could apply.

Under preparation. Current stage at the time of publication: FprEN 16905-2:2022.
Under preparation. Current stage at the time of publication: prEN 16905-3:2023.
Under preparation. Current stage at the time of publication: FprEN 16905-4:2023.

1 Scope
This part of the EN 16905 series specifies the terms and definitions for the rating and performance
calculation of gas-fired endothermic engine driven heat pumps for heating and/or cooling mode
including the engine heat recovery, to be used outdoors.
This document specifies the terms and definitions.
This document is intended to be used in conjunction with the following standards:
— EN 16905-2:— on safety;
— EN 16905-3:— on test conditions;
— EN 16905-4:— on the requirements, test conditions and test methods;
— EN 16905-5:2022 on the calculation of seasonal performances in heating and cooling mode;
— the heat pump standards, EN 14511-2, EN 14511-3 and EN 14825.
This document only applies to appliances with a maximum heat input (based on net calorific value) not
exceeding 70 kW at standard rating conditions.
This document only applies to appliances under categories I , I , I , I , I , I , I , I ,
2H 2E 2Er 2R 2E(S)B 2L 2LL 2ELL
I , I , I , I , I , I , II , II , II , II , II , II , II , II ,
2E(R)B 2ESi 2E(R) 3P 3B 3B/P 2H3+ 2Er3+ 2H3B/P 2L3B/P 2E3B/P 2ELL3B/P 2L3P 2H3P
II and II according to EN 437.
2E3P 2Er3P
This document only applies to appliances:
a) having gas fired endothermic engines under the control of fully automatic control systems;
b) having 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 document applies to GEHP appliances only when used for space heating or space cooling or for
refrigeration, with or without heat recovery.
This document is applicable to GEHP appliances that are intended to be type tested. Requirements for
GEHP appliances that are not type tested would need to be subject to further consideration.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
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.
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 designe
...