prEN 16905-2

Gas-fired endothermic engine driven heat pumps - Part 2: Safety

This part of prEN 16905 specifies the safety requirements, the safety test conditions and the safety test methods 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 minimum operating requirements which ensure that the products are fit for the use designated by the manufacturer when used for space heating and/or cooling.
This document is to be used in conjunction with:
a)   the terms and conditions, EN 16905-1:2017;
b)   the test conditions, EN 16905-3:2017;
c)   the test methods, EN 16905-4:2017;
d)   the calculation of seasonal performances in heating and cooling mode, EN 16905-5:2017;
e)   the heat pump, prEN 14511-4:2021, EN 378-1:2016+A1:2020, EN 378-2:2016, EN 378 3:2016+A1:2020, EN 378-4:2016+A1:2019 and EN 14825:2018;
f)   electrical safety, EN 60335-1:2012, EN 60335-2-102:2016, EN 60335-2-40:20032 and EN 60204 1:2018.
This document only applies to GEHP appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions.
This document only applies to GEHP 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 437:2021.
This document only applies to GEHP appliances:
a)   that have gas fired endothermic engines under the control of fully automatic control systems;
b)   that have 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.

Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 2: Sicherheit

Dieser Teil von prEN 16905 legt die Sicherheitsanforderungen, die Sicherheitsprüfbedingungen und die Sicherheitsprüfverfahren von gasbefeuerten endothermischen Motor Wärmepumpen für den Heiz  und/oder Kühlbetrieb einschließlich der Wärmerückgewinnung des Motors fest, die im Freien zu verwenden sind.
Dieses Dokument legt Mindestbetriebsanforderungen fest, die sicherstellen, dass die Produkte bei Verwen¬dung für die Raumheizung/ kühlung für die vom Hersteller ausgewiesene Nutzung geeignet sind.
Dieses Dokument ist anzuwenden in Verbindung mit:
a)   den Begriffen und Bedingungen nach EN 16905 1:2017;
b)   den Prüfbedingungen nach EN 16905 3:2017;
c)   den Prüfverfahren nach EN 16905 4:2017;
d)   der Berechnung der saisonalen Effizienzkennzahlen im Heiz  und Kühlbetrieb nach EN 16905 5:2017;
e)   der Wärmepumpe nach prEN 14511 4:2021, EN 378 1:2016+A1:2020, EN 378 2:2016, EN 378 3:2016+A1:2020, EN 378 4:2016+A1:2019 und EN 14825:2018;
f)   der elektrischen Sicherheit nach EN 60335 1:2012, EN 60335 2 102:2016, EN 60335 2 40:20032 und EN 60204 1:2018.
Dieses Dokument gilt ausschließlich für GEHP Systeme mit einer Höchst Wärmebelastung von 70 kW (bezogen auf den Heizwert, en: net calorific value) bei Norm Nennbedingungen.
Dieses Dokument gilt ausschließlich für GEHP Geräte der 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 nach EN 437:2021.
Dieses Dokument gilt ausschließlich für GEHP Systeme:
a)   die über gasbefeuerte endothermischen Motoren verfügen, die durch vollständig automatisierte Rege¬lungen gesteuert werden;
b)   die über geschlossene Kühlkreislaufsysteme verfügen, in denen das Kühlmittel nicht direkt mit dem zu kühlenden oder zu erwärmenden Fluid in Berührung kommt;
c)   bei denen die Temperatur des Wärmeübertragungsmediums im Heizsystem (Heizungswasserkreislauf) im Normalbetrieb 105 °C nicht überschreitet;
d)   bei denen der höchste Betriebsdruck im:
1)   Heizungswasserkreislauf (falls installiert) 6 bar nicht überschreitet;
2)   Warmwasserbereitungskreislauf für Nutzwasser (falls installiert) 10 bar nicht überschreitet.
Dieses Dokument gilt ausschließlich für GEHP Systeme, die zur Raumbeheizung oder  kühlung oder zur Kälteerzeugung mit oder ohne Wärmerückgewinnung angewendet werden.
Dieses Dokument gilt für GEHP Systeme, die für eine Typprüfung vorgesehen sind. Anforderungen an nicht typgeprüfte GEHP Systeme wären ein Thema für weitere Überlegungen.

Pompes à chaleur à moteur endothermique alimenté au gaz - Partie 2 : Sécurité

La présente partie de la prEN 16905 spécifie les exigences de sécurité, les conditions d'essai de sécurité et les méthodes d'essai de sécurité des pompes à chaleur à moteur endothermique alimenté en gaz pour le mode chauffage et/ou refroidissement, y compris la récupération de la chaleur du moteur, destinées à être utilisées à l'extérieur.
Le présent document spécifie les exigences minimales de fonctionnement qui permettent d'assurer que les produits sont adaptés à l'usage prévu par le fabricant en cas d'utilisation pour le chauffage et/ou le refroidissement de locaux.
Le présent document est à être utilisé conjointement avec :
a)   les termes et définitions, EN 16905-1:2017 ;
b)   les conditions d'essai, EN 16905-3:2017 ;
c)   les méthodes d'essai, EN 16905-4:2017 ;
d)   le calcul des performances saisonnières en modes chauffage et refroidissement, EN 16905-5:2017 ;
e)   la pompe à chaleur, prEN 14511-4:2021, EN 378-1:2016+A1:2020, EN 378-2:2016, EN 378 3:2016+A1:2020, EN 378-4:2016+A1:2019 et EN 14825:2018 ;
f)   la sécurité électrique, EN 60335-1:2012, EN 60335-2-102:2016, EN 60335-2-40:20032 et EN 60204 1:2018.
Le présent document s'applique uniquement aux appareils GEHP dont le débit calorifique maximal (dérivé du pouvoir calorifique inférieur) ne dépasse pas 70 kW dans les conditions de performance nominale.
Le présent document s'applique uniquement aux appareils GEHP des 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 437:2021.
Le présent document s'applique uniquement aux appareils GEHP :
a)   qui sont équipés de moteurs endothermiques alimentés au gaz régulés par des systèmes de régulation entièrement automatisés ;
b)   qui comportent 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) ;
2)   ne dépasse pas 10 bar dans le circuit d'eau chaude sanitaire (le cas échéant).
Le présent document s'applique aux appareils GEHP uniquement en cas d'utilisation pour le chauffage ou le refroidissement de locaux ou pour la réfrigération, avec ou sans récupération de chaleur.
Le présent document s'applique aux appareils GEHP qui sont destinés aux essais de type. Les exigences relatives aux appareils GEHP non soumis à des essais de type pourraient appeler des considérations supplémentaires.

Toplotna črpalka s plinsko gnanim motorjem z notranjim zgorevanjem - 2. del: Varnost

General Information

• Status: Not Published
• Publication Date: 01-Aug-2023
• 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: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 04-Aug-2022
• Due Date: 19-Jul-2022
• Completion Date: 04-Aug-2022
• Directive: 2016/2281 - Commission Regulation (EU) 2016/2281 of 30 November 2016 implementing Directive 2009/125/EC of the European Parliament and of the Council establishing a framework for the setting of ecodesign requirements for energy-related products, with regard to ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coil units
• Directive: 2016/426 - REGULATION (EU) 2016/426 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Mandate: M/535 - [C(2016)2626) Standardisation request to the European standardisation organisations to draft harmonised European standards pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to eco-design requirements for space heaters and combination heaters and Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heaters, temperature control and solar device and packages of combination heater, temperature control and solar device
• Mandate: M/560 - [C(2019) 1725 final] Ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coils in support of Commission Regulation (EU) 2016/2281
• Mandate: M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: oSIST prEN 16905-2:2022 - Gas-fired endothermic engine driven heat pumps - Part 2: Safety

Relations

• Revises: EN 16905-2:2020 - Gas-fired endothermic engine driven heat pumps - Part 2: Safety
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 16905-2:2022
01-januar-2022
Toplotna črpalka s plinsko gnanim motorjem z notranjim zgorevanjem - 2. del:
Varnost
Gas-fired endothermic engine driven heat pumps - Part 2: Safety
Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 2: Sicherheit
Pompes à chaleur à moteur endothermique alimenté au gaz - Partie 2: Sécurité
Ta slovenski standard je istoveten z: prEN 16905-2
ICS:
27.080 Toplotne črpalke Heat pumps
oSIST prEN 16905-2:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 16905-2:2022
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oSIST prEN 16905-2:2022
DRAFT
EUROPEAN STANDARD
prEN 16905-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 27.080 Will supersede EN 16905-2:2020
English Version
Gas-fired endothermic engine driven heat pumps - Part 2:
Safety

Pompes à chaleur à moteur endothermique alimenté Gasbefeuerte endothermische Motor-Wärmepumpen -

au gaz - Partie 2: Sécurité Teil 2: Sicherheit

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 299.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16905-2:2021 E

worldwide for CEN national Members.
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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 9

4 Classification ..................................................................................................................................................... 9

4.1 General ................................................................................................................................................................ 9

4.2 Classification of GEHP appliances ............................................................................................................. 9

4.3 GEHP appliance classification according to the maximum water side operating

pressure (PMS): ............................................................................................................................................ 10

5 Design requirements .................................................................................................................................. 10

5.1 Structure .......................................................................................................................................................... 10

5.2 Material ............................................................................................................................................................ 13

5.3 EMC / Electrical requirements ................................................................................................................ 20

6 Operational requirements ........................................................................................................................ 20

6.1 General requirements ................................................................................................................................ 20

6.2 Soundness ....................................................................................................................................................... 21

6.3 Heat input at standard rating conditions ............................................................................................ 22

6.4 Limit temperatures ..................................................................................................................................... 22

6.5 Limit operating conditions ....................................................................................................................... 24

6.6 Insulation resistance .................................................................................................................................. 24

6.7 Transient overvoltage ................................................................................................................................ 24

6.8 Withstand voltage ........................................................................................................................................ 24

6.9 Waterproof performance .......................................................................................................................... 24

6.10 Sound power level ........................................................................................................................................ 25

6.11 Engine perform ............................................................................................................................................. 25

6.12 Power failure ................................................................................................................................................. 26

6.13 Abnormalities ................................................................................................................................................ 27

6.14 Starting current ............................................................................................................................................ 27

7 Test methods ................................................................................................................................................. 27

7.1 General test conditions .............................................................................................................................. 27

7.2 Soundness ....................................................................................................................................................... 29

7.3 Heat input at standard rating conditions ............................................................................................ 31

7.4 Limit temperatures ..................................................................................................................................... 31

7.5 Limit operating conditions ....................................................................................................................... 32

7.6 Insulation resistance test .......................................................................................................................... 33

7.7 Transient overvoltage test ........................................................................................................................ 33

7.8 Withstand voltage test ................................................................................................................................ 34

7.9 Waterproof performance test .................................................................................................................. 34

7.10 Sound power level test ............................................................................................................................... 34

7.11 Engine performance .................................................................................................................................... 34

7.12 Power failure test ......................................................................................................................................... 35

7.13 Abnormalities test ....................................................................................................................................... 35

7.14 Starting current test .................................................................................................................................... 35

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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)

8 Risk assessment ............................................................................................................................................ 35

9 Marking and instructions .......................................................................................................................... 36

9.1 GEHP appliance marking ........................................................................................................................... 36

9.2 Instructions ..................................................................................................................................................... 38

9.3 Presentation ................................................................................................................................................... 40

Annex A (informative) Calculation of conversion of NO ............................................................................. 41

A.1 General ............................................................................................................................................................. 41

Annex B (normative) Engine startup test method ......................................................................................... 42

B.1 General ............................................................................................................................................................. 42

B.2 Test condition ................................................................................................................................................ 42

B.3 Test method .................................................................................................................................................... 42

Annex C (normative) CO concentration test method .................................................................................... 43

C.1 General ............................................................................................................................................................. 43

C.2 Test condition ................................................................................................................................................ 43

Annex D (normative) NO concentration test method .................................................................................. 46

D.1 General ............................................................................................................................................................. 46

D.2 Engine rpm equivalent method ............................................................................................................... 46

D.3 Test condition ................................................................................................................................................ 46

D.4 Conversion ...................................................................................................................................................... 47

D.5 Accuracies of measurement ...................................................................................................................... 48

Annex E (normative) Power failure test method............................................................................................ 49

E.1 General ............................................................................................................................................................. 49

E.2 Test method .................................................................................................................................................... 49

Annex F (informative) Examples for marking ................................................................................................. 50

F.1 Data-plate (see 9.1.1) .................................................................................................................................. 50

F.2 Additional data-plate (see 9.1.2)............................................................................................................. 50

Annex G (informative) Examples for NO calculation ................................................................................... 51

G.1 E calculation .............................................................................................................................. 51

rpm equivalvent

ppm to mg/kWh conversation ......................................................................................................... 51

G.2 NOx

G.3 Temperature and humidity correction formula calculation ........................................................ 51

Annex ZA (informative) Relationship between this European Standard and the

requirements of Commission Regulation (EU) No 2016/426 aimed to be covered ............. 52

Annex ZB (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No 813/2013 aimed to be covered ............. 55

Annex ZC (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No 2016/2281 aimed to be covered........... 56

Bibliography ................................................................................................................................................................. 57

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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)
European foreword

This document (prEN 16905-2:2021) 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 16905-2:2020.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, ZB and ZC, which are

an integral part of this document.

In comparison with the previous edition, the following technical modifications have been made:

— Editorial and technical changes throughout the draft and in Annex ZA, ZB and ZC in order to align

the text to the Ecodesign Requirements stated in Commission Regulation (EU) No 2016/426.

EN 16905 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: Tests conditions;
— Part 4: Tests methods;
— Part 5: Calculation of seasonal performances in heating and cooling mode.
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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)
Introduction

The GEHP appliances having their condenser cooled by air and by the evaporation of external additional

water are not covered by this European Standard.
Single split and multisplit systems are covered by this European Standard.
The GEHP appliances can have one or more primary or secondary functions.

This European Standard 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".

EN 16905-2:2020 has been prepared to address the essential requirements of the European Regulation

(EU) 2016/426 relating to appliances burning gaseous fuels and repealing Directive 2009/142/EC (see

EN 16905-2:2020, Annex ZA).

EN 16905-1:2017, EN 16905-2:2020, EN 16905-3:2017, EN 16905-4:2017 and EN 16905-5:2017 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

EN 16905-2:2020, Annexes ZB and ZC).
These documents will be reviewed whenever new mandates could apply.
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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)
1 Scope

This part of prEN 16905 specifies the safety requirements, the safety test conditions and the safety test

methods 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 minimum operating requirements which ensure that the products are fit for

the use designated by the manufacturer when used for space heating and/or cooling.

This document is to be used in conjunction with:
a) the terms and conditions, EN 16905-1:2017;
b) the test conditions, EN 16905-3:2017;
c) the test methods, EN 16905-4:2017;

d) the calculation of seasonal performances in heating and cooling mode, EN 16905-5:2017;

e) the heat pump, prEN 14511-4:2021, EN 378-1:2016+A1:2020, EN 378-2:2016,
EN 378-3:2016+A1:2020, EN 378-4:2016+A1:2019 and EN 14825:2018;

f) electrical safety, EN 60335-1:2012, EN 60335-2-102:2016, EN 60335-2-40:2003 and

EN 60204-1:2018.

This document only applies to GEHP appliances with a maximum heat input (based on net calorific

value) not exceeding 70 kW at standard rating conditions.

This document only applies to GEHP 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 437:2021.
This document only applies to GEHP appliances:

a) that have gas fired endothermic engines under the control of fully automatic control systems;

b) that have 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.

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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances

EN 378-2:2016, Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2:

Design, construction, testing, marking and documentation
EN 437:2021, Test gases - Test pressures - Appliance categories

EN 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment

CR 1404:1994, Determination of emissions from appliances burning gaseous fuels during type-testing

EN 1561:2011, Founding - Grey cast irons

EN 10029:2010, Hot-rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape

EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper

external threads and parallel internal threads - Dimensions, tolerances and designation

EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper

external threads and taper internal threads - Dimensions, tolerances and designation

EN 12102-1:2017, Air conditioners, liquid chilling packages, heat pumps, process chillers and

dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 1: Air

conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and

process chillers

EN 12102-2:2019, Air conditioners, liquid chilling packages, heat pumps, process chillers and

dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 2: Heat

pump water heaters

EN 14800:2007, Corrugated safety metal hose assemblies for the connection of domestic appliances using

gaseous fuels

EN 16436-1:2014+A3:2020, Rubber and plastics hoses, tubing and assemblies for use with propane and

butane and their mixtures in the vapour phase - Part 1: Hoses and tubings

EN 16905-1:2017, Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions

EN 16905-3:2017, Gas-fired endothermic engine driven heat pumps - Part 3: Test conditions

EN 16905-4:2017, Gas-fired endothermic engine driven heat pumps - Part 4: Test methods

EN 16905-5:2017, Gas-fired endothermic engine driven heat pumps - Part 5: Calculation of seasonal

performances in heating and cooling mode

EN IEC 55014-1:2021, Electromagnetic compatibility - Requirements for household appliances, electric

tools and similar apparatus - Part 1: Emission
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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)

EN IEC 55014-2:2021, Electromagnetic compatibility - Requirements for household appliances, electric

tools and similar apparatus - Part 2: Immunity - Product family standard

EN 60335-1:2012 , Household and similar electrical appliances – Safety – Part 1: General requirements

EN 60335-2-40:2003 , Household and similar electrical appliances - Safety - Part 2-40: Particular

requirements for electrical heat pumps, air-conditioners and dehumidifiers

EN 60335-2-102:2016, Household and similar electrical appliances - Safety - Part 2-102: Particular

requirements for gas, oil and solid-fuel burning appliances having electrical connections

EN 60529:1991 , Degrees of protection provided by enclosures (IP Code)

EN 61000-3-2:2014, Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current

emissions (equipment input current ≤ 16 A per phase)

EN 61000-3-3:2013, Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage

changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated

current <= 16 A per phase and not subject to conditional connection

EN IEC 61000-3-11:2019, Electromagnetic compatibility (EMC) - Part 3-11: Limits - Limitation of voltage

changes, voltage fluctuations and flicker in public low-voltage supply systems - Equipment with rated

current ≤ 75 A and subject to conditional connection

EN 61000-3-12:2011, Electromagnetic compatibility (EMC) - Part 3-12: Limits - Limits for harmonic

currents produced by equipment connected to public low-voltage systems with input current > 16 A and <=

75 A per phase

EN IEC 61000-6-1:2019, Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity

standard for residential, commercial and light-industrial environments

EN 61000-6-3:2007, Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission

standard for residential, commercial and light-industrial environments

EN ISO 2553:2019, Welding and allied processes - Symbolic representation on drawings - Welded joints

(ISO 2553:2019, Corrected version 2021-09)

EN ISO 3166-1:2020, Codes for the representation of names of countries and their subdivisions - Part 1:

Country code (ISO 3166-1:2020)

EN ISO 4063:2010, Welding and allied processes - Nomenclature of processes and reference numbers (ISO

4063:2009, Corrected version 2010-03-01)

As impacted by EN 60335-1:2012/A11:2014, EN 60335-1:2012/AC:2014, EN 60335-1:2012/A13:2017,

EN 60335-1:2012/A1:2019, EN 60335-1:2012/A2:2019, EN 60335-1:2012/A14:2019 and
EN 60335-1:2012/A15:2021.
As impacted by EN 60335-2-40:2003/A11:2004, EN 60335-2-40:2003/A12:2005,

EN 60335-2-40:2003/A1:2006, EN 60335-2-40:2003/Cor.:2006, EN 60335-2-40:2003/A2:2009,

EN 60335-2-40:2003/Cor.:2010, EN 60335-2-40:2003/A13:2012 and EN 60335-2-40:2003/A13:2012/AC:2013.

As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
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oSIST prEN 16905-2:2022
prEN 16905-2:2021 (E)

EN ISO 7010:2020, Graphical symbols - Safety colours and safety signs - Registered safety signs (ISO

7010:2019, Corrected version 2020-06)

ISO 857-2:2005, Welding and allied processes - Vocabulary - Part 2: Soldering and brazing processes and

related terms
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 16905-1:2017 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
maximun water operating pressure
PMS

maximum water operating pressure at which the GEHP appliance can be used, in bars given by the

symbol “PMS”, followed by the equals sign, the numerical value and the unit “bar
3.2
Ignition Safety Time
TSA

time elapsing between the start and the stop of the gas supply to internal combustion engine in the

event of ignition not taking place
3.3
Maximum Ignition Safety Time
TSA max

ignition safety time measured under the least favourable conditions of ambient temperature and

variation in supply voltage
4 Classification
4.1 General
GEHP appliances can be classified according to:
— the gases they use;
— the unit structure;
— air blowing system.
4.2 Classification of GEHP appliances
4.2.1 Classification of gases

Gases are classified into three families, possibly divided into groups according to the value of the Wobbe

index. Families and groups of gas used in this standard are in accordance with those of the

nd rd

EN 437:2021. This standard is for GEHP appliances working with 2 and 3 gas family only.

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4.2.2 Classification according to the unit structure
4.2.2.1 Single split

Single GEHP appliance in combination with single heating/cooling device to form a discrete matched

functional unit.
4.2.2.2 Multi split

Single GEHP appliance with a single refrigerant circuit in combination with multiple heating/cooling

devices.
4.2.3 Classification according to the air blowing system
4.2.3.1 Non ducted type

Air introduced from the space containing the unit and discharged within the same space.

4.2.3.2 Ducted type

Air introduced from the space containing the unit and discharged outside this space.

4.3 GEHP appliance classification according to the maximum water side operating
pressure (PMS):
— pressure class 1: PMS = 1 bar
— pressure class 2: PMS = 3 bar
— pressure class 3: 3 bar < PMS ≤ 6 bar

NOTE Internal cooling circuits in GEHP appliances are not considered under this classification, e.g. internal

cooli
...