Gas appliances - Combined heat and power appliance of nominal heat input inferior or equal to 70 kW

This European Standard specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy and the marking of a micro combined heat and power appliance; (hereafter referred to as “mCHP appliance”). This European Standard applies to mCHP appliances of types B22, B23, B32, B33, B52, B53, C1, C3, C42, C43 C52, C53, C62, C63, C82, C83 and C9 based on the classifications of CEN/TR 1749: – that use one or more supplied gases of the three gas families at the pressures stated in EN 437, – where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 ºC during normal operation, – where the maximum operating pressure in the - heating water circuit does not exceed 6 bar, - domestic hot water circuit (if installed) does not exceed 10 bar, – which are either intended to be installed indoors or outdoors in a partially protected place, – which are intended to produce hot water either by the instantaneous or storage principle, – which have a maximum heat input (based on net calorific value) not exceeding 70 kW, – which are designed for sealed or open water systems. NOTE 1 For applications where the maximum allowable water temperature exceeds 110 ºC or where volume multiplied by maximum allowable pressure exceeds 50 bar litres, further requirements may be necessary to comply with the essential requirements of Directive 97/23/EC (Pressure Equipment Directive (PED)). NOTE 2 For mCHP appliances with constructions that might not be fully covered by this European Standard or by another specific standard, the risk associated with the alternative construction will be assessed. NOTE 3 This EN includes formulae and methods intended to produce values required by implementation measures of the ErP Directive 2009/125/EC and Labelling Directive 2010/30/EU. NOTE 4 EN 13203-4 will specify the assessment of energy consumption for domestic hot water production of gas combined heat and power appliances (mCHP). This European Standard does not contain the requirements necessary for appliance capable of producing electrical energy without using the thermal energy. This European Standard does not cover all the requirements for mCHP appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex DD).

Gasgeräte - Geräte zur Kraft-Wärme-Kopplung mit einer Nennwärmebelastung kleiner oder gleich 70 kW

Dieser Entwurf legt die Anforderungen und Prüfmethoden für den Bau, die Sicherheit, die Gebrauchstauglichkeit und den rationellen Energieeinsatz und die Kennzeichnung von Mikro-Kraft-Wärme-Kopplungsanlagen (ab hier als µKWK-Anlage bezeichnet). Dieser Entwurf gilt bei µKWK-Anlagen der Typen B22, B23, B32, B33, B52, B53, C1, C3, C4, C5, C6, und C8, wie in CEN/TR 1749 spezifiziert, – die ein oder mehr Verbrennungsgase der drei Gasfamilien bei den in EN 437 angegebenen Drücken verwenden – bei welchen die Temperatur des Wärmetauschermediums 105 °C bei Nennbetrieb nicht überschreitet. – bei welchen der maximale Betriebsdruck im • Heizwasserkreislauf 6 bar nicht überschreitet, • häuslichen Warmwasserkreislauf (falls installiert) maximal 10 bar beträgt. – die unter bestimmten Umständen Kondensation hervorrufen können; – die vom Hersteller als Brennwertgerät bezeichnet werden; – die vorgesehen sind für den Einbau in teilweise geschützte Räume; – die vorgesehen sind um Warmwasser entweder durch Durchlauf- oder Speicherprinzip zu erzeugen; – die eine maximale Wärmebelastung (bezogen auf Brennwert)von 70 kW nicht überschreiten; – die für abgedichtete oder offene Wassersysteme konstruiert sind; ANMERKUNG 1 Anwendungen, deren maximal erlaubte Temperatur 110 °C überschreitet, oder bei denen das Volumen multipliziert mit dem maximal erlaubten Druck 50 bar•liter übersteigt, können weitere Anforderungen nach sich ziehen, um den notwendigen Anforderungen der Direktive 97/23/EC (Pressure Equipment Directive (PED)) zu genügen. ANMERKUNG 2 Für µKWK-Geräte mit einer Bauart, die nicht vollständig durch diese Norm oder eine andere spezielle Norm abgedeckt sind, muss das Risiko durch die alternative Bauart abgeschätzt werden. Dieser Entwurf gilt nur für Typenprüfungen. Dieser Entwurf enthält keine Anforderungen an Geräte, die elektrische Energie ohne Nutzung der thermischen Energie erzeugen.

Appareils à gaz - Appareils produisant de la chaleur et de l’électricité combinées dont le débit calorifique nominal est inférieur ou égal à 70 kW

La présente Norme européenne spécifie les exigences et méthodes d’essai relatives à la construction, la sécurité, l’aptitude aux conditions d’emploi, l’utilisation rationnelle de l’énergie et le marquage des appareils produisant de la chaleur et de l’électricité combinées (ici appelés « appareils mCHP »). La présente Norme européenne s’applique aux appareils mCHP de types B22, B23, B32, B33, B52, B53, C1, C3, C4, C5, C6 et C8 selon le CEN/TR 1749  utilisant un ou plusieurs gaz combustibles composant les trois familles de gaz, aux pressions établies dans l’EN 437,  dont la température du fluide caloporteur ne dépasse pas 105 ºC en fonctionnement normal,  dont la pression de fonctionnement maximale dans le :  circuit d’eau de chauffage ne dépasse pas 6 bar,  circuit d’eau chaude sanitaire (si installé) est de 10 bar au maximum,  pouvant générer de la condensation dans certaines circonstances,  étant déclarés par le fabricant comme étant des « appareils à condensation »,  dont l’installation est prévue dans un endroit partiellement protégé,  destinés à produire de l'eau chaude instantanée ou par accumulation,  dont le débit calorifique maximal (en fonction du pouvoir calorifique inférieur) ne dépasse pas 70 kW,  étant conçus pour les systèmes à circuit d’eau fermé ou ouvert.

Plinske naprave - Kombinirane ogrevalne in pogonske naprave z imensko močjo do vključno 70 kW

General Information

Status
Published
Publication Date
22-Jan-2015
Current Stage
6060 - Document made available
Due Date
23-Jan-2015
Completion Date
23-Jan-2015

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SLOVENSKI STANDARD
SIST EN 50465:2015
01-junij-2015
1DGRPHãþD
SIST EN 50465:2009
3OLQVNHQDSUDYH.RPELQLUDQHRJUHYDOQHLQSRJRQVNHQDSUDYH]LPHQVNRPRþMR
GRYNOMXþQRN:

Gas appliances - Combined heat and power appliance of nominal heat input inferior or

equal to 70 kW
Gasgeräte - Geräte zur Kraft-Wärme-Kopplung mit einer Nennwärmebelastung kleiner
oder gleich 70 kW

Appareils fonctionnant au gaz - Appareils produisant de la chaleur et de l’électricité

combinées dont le débit calorifique nominal est inférieur ou égal à 70 kW
Ta slovenski standard je istoveten z: EN 50465:2015
ICS:
27.070 Gorilne celice Fuel cells
97.100.99 Grelniki, ki uporabljajo druge Heaters using other sources
vire energije of energy
SIST EN 50465:2015 en

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

---------------------- Page: 1 ----------------------
SIST EN 50465:2015
---------------------- Page: 2 ----------------------
SIST EN 50465:2015
EUROPEAN STANDARD EN 50465
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2015
ICS 27.070; 97.100.20 Supersedes EN 50465:2008
English Version
Gas appliances - Combined heat and power appliance of
nominal heat input inferior or equal to 70 kW

Appareils à gaz - Appareils produisant de la chaleur et de Gasgeräte - Geräte zur Kraft-Wärme-Kopplung mit einer

l'électricité combinées dont le débit calorifique nominal est Nennwärmebelastung kleiner oder gleich 70 kW

inférieur ou égal à 70 kW

This European Standard was approved by CENELEC on 29 October 2014. CEN and CENELEC 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 and CENELEC 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 and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre

has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland, Turkey and United Kingdom
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for

CEN/CENELEC CENELEC Members.
Ref. No. EN 50465:2015 E
---------------------- Page: 3 ----------------------
SIST EN 50465:2015
EN 50465:2015 – 2 –
Contents

Foreword ...................................................................................................................................................... 6

1 Scope .................................................................................................................................................... 8

2 Normative references .......................................................................................................................... 8

3 Terms and definitions ....................................................................................................................... 11

4 Classification ..................................................................................................................................... 26

4.1 Gases/Categories ..................................................................................................................... 26

4.2 Mode of air supply and evacuation of combustion products ..................................................... 26

4.3 Maximum water side operating pressure .................................................................................. 28

4.4 Expansion system ..................................................................................................................... 28

5 Constructional requirements ........................................................................................................... 28

5.1 General construction ................................................................................................................. 28

5.2 Use and servicing ...................................................................................................................... 30

5.3 Connections to the gas and water pipes ................................................................................... 30

5.4 Soundness ................................................................................................................................ 31

5.5 Supply of air and evacuation of combustion products .............................................................. 32

5.6 Requirements for a fan incorporated in a mCHP appliance ..................................................... 33

5.7 Gas/air ratio controls ................................................................................................................. 33

5.8 Air proving ................................................................................................................................. 34

5.9 Checking the state of operation ................................................................................................ 35

5.10 Operational safety in the event of failure of the energy supply for the control systems ........... 35

5.11 Drainage .................................................................................................................................... 35

5.12 Conversion to different gases ................................................................................................... 35

5.13 Materials and thickness............................................................................................................. 36

5.14 Thermal insulation ..................................................................................................................... 42

5.15 Durability against corrosion of metallic combustion product circuits ....................................... 42

5.16 Requirements for valves as parts of the gas circuit .................................................................. 43

5.17 Combustion products evacuation duct ...................................................................................... 44

5.18 Design ....................................................................................................................................... 44

5.19 Gas carrying circuit ................................................................................................................... 45

5.20 Electrical equipment .................................................................................................................. 47

5.21 Requirements for adjusting, control and safety devices ........................................................... 48

5.22 Burners ...................................................................................................................................... 54

6 Operational requirements ................................................................................................................. 54

6.1 General requirements ............................................................................................................... 54

6.2 Soundness ................................................................................................................................ 55

6.3 Heat input and heat and electrical output ................................................................................. 58

6.4 Safety of operation (temperature / limit gas) ............................................................................. 58

6.5 Start / Release and adjusting, control and safety devices (if applicable) ................................. 63

6.6 Efficiency ................................................................................................................................... 68

6.7 Operation .................................................................................................................................. 68

6.8 Combustion ............................................................................................................................... 68

6.9 Resistance of materials to pressure .......................................................................................... 69

6.10 Hydraulic resistance .................................................................................................................. 70

6.11 Formation of condensate .......................................................................................................... 70

6.12 Designation and measurement of reference temperatures of flue systems ............................. 70

6.13 Mechanical resistance and stability of ducts, terminal and fitting pieces .................................. 71

6.14 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting

pieces for mCHP appliances ..................................................................................................... 71

6.15 Requirements for elastomeric seals and elastomeric sealants in the combustion product

evacuation ducts, terminals and fitting pieces .......................................................................... 75

6.16 Special provisions for mCHP appliances intended to be installed in a partially protected

place .......................................................................................................................................... 77

7 Test methods ..................................................................................................................................... 77

7.1 General test conditions ............................................................................................................. 77

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SIST EN 50465:2015
– 3 – EN 50465:2015

7.2 Soundness ................................................................................................................................ 86

7.3 Heat input and heat and electrical output ................................................................................. 90

7.4 Safety of operation .................................................................................................................... 92

7.5 Start / Release and adjusting, control and safety devices ...................................................... 107

7.6 Efficiency ................................................................................................................................. 112

7.7 Operation ................................................................................................................................ 120

7.8 Combustion ............................................................................................................................. 120

7.9 Resistance of the materials to pressure .................................................................................. 126

7.10 Hydraulic resistance ................................................................................................................ 126

7.11 Formation of condensate ........................................................................................................ 127

7.12 Designation and measurement of reference temperatures of flue systems ........................... 128

7.13 Mechanical resistance and stability of ducts, terminal and fitting pieces ................................ 128

7.14 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting

pieces for mCHP appliances ................................................................................................... 129

7.15 Tests for elastomeric seals and elastomeric sealants in the combustion product

evacuation ducts, terminals and fitting pieces ........................................................................ 132

7.16 Special provisions for mCHP appliances intended to be installed in a partially protected

place ........................................................................................................................................ 134

8 EMC / electrical requirements ........................................................................................................ 134

8.1 Relevant for the Gas safety .................................................................................................... 134

8.2 Relevant for the Electrical safety related to the grid with indirect effect to gas safety ............ 134

8.3 Relevant for the EMC .............................................................................................................. 134

9 Marking, installation and operating instructions ......................................................................... 135

9.1 mCHP appliance marking ....................................................................................................... 135

9.2 Installation instructions ............................................................................................................ 138

9.3 Operating instructions (i.e. users’ instructions) ....................................................................... 141

9.4 Conversion instructions ........................................................................................................... 142

9.5 Presentation ............................................................................................................................ 142

Annex A (informative) Different gas connections in common use in the various countries ......... 143

Annex B (informative) Classification of type B and type C mCHP appliances ............................... 144

Annex C (informative) Composition of the gas circuit ....................................................................... 149

Annex D (informative) Practical method of calibrating the test rig to enable the heat loss D to

be determined .................................................................................................................................. 151

Annex E (informative) A-deviations ..................................................................................................... 152

Annex F (informative) Main symbols and abbreviations used .......................................................... 153

Annex G (informative) Examples for marking ..................................................................................... 154

Annex H (informative) Calculation of conversions of NO ................................................................ 155

Annex I (informative) Test rig for the measurement of the stand-by heat losses ........................... 156

Annex CC (normative) Test methods to determine the effects of long-term thermal load, long-

term condensate exposure, condensing/ non- condensing cycling and resistance to UV

radiation ........................................................................................................................................... 158

Annex DD (informative) Variations in gas quality .............................................................................. 159

Annex EE (informative) Calculation of the efficiency for ErP ........................................................... 164

Annex ZZ (informative) Coverage of Essential Requirements of EU Directives ............................. 167

Bibliography ............................................................................................................................................ 170

---------------------- Page: 5 ----------------------
SIST EN 50465:2015
EN 50465:2015 – 4 –
Figures

Figure 1 – Typical set-up for a fuel cell mCHP appliance ........................................................................... 15

Figure 2 – Typical set-up for a Stirling engine mCHP appliance ................................................................ 15

Figure 3 – Typical set-up for an internal combustion engine mCHP appliance .......................................... 16

Figure 4 – Example of a sampling probe for the measurement of the products of combustion ................. 79

Figure 5 – Example of the location of the probe for a C type appliance ..................................................... 80

Figure 6 – Test rig for the soundness of the gas carrying circuit ................................................................ 85

Figure 7 – Test rig for the soundness of components (pressure drop method) .......................................... 86

Figure 8 – Test rig for thermostats: short cut circulation ............................................................................. 94

Figure 9 – Test rig for thermostats with heat exchanger ............................................................................ 95

Figure 10 – Test rig for type C appliances, equipped with horizontal wind protection device at a

vertical wall ......................................................................................................................................... 99

Figure 11 – Test rig for type C appliances for installation in buildings with tilted roof ............................. 100

Figure 12 – Test rig for type C and C appliances for installation in flat roofed buildings ....................... 101

3 9

Figure 13 – Test rig for type C and C appliances for installation in buildings with tilted roof ................. 102

3 9

Figure 14 – Measuring points for the stand-by heat losses ...................................................................... 114

Figure 15 – Test rig for the determination of hydraulic resistance ............................................................ 127

Figure B.1 – Type B ................................................................................................................................. 144

Figure B.2 – Type B ................................................................................................................................. 144

Figure B.3 – Type C ................................................................................................................................. 145

Figure B.4 – Type C ................................................................................................................................. 145

Figure B.5 – Type C ................................................................................................................................. 146

Figure B.6 – Type C ................................................................................................................................. 146

Figure B.7 – Type C ................................................................................................................................. 147

Figure B.8 – Type C ................................................................................................................................. 147

Figure B.9 – Type C ................................................................................................................................. 148

Figure C.1 – Automatic gas shut off valves in the gas supply line for mCHP appliances ....................... 149

Figure C.2 – Automatic gas shut off valves in the gas supply line for permanent or alternating mCHP

appliances ........................................................................................................................................ 150

Figure I.1 – Test rig ................................................................................................................................... 156

Figure DD.1 – The relation between the (extreme) limit gases (ELG), the reference gas (RG) and the

normal distribution gas (NDG) the appliance is designed for. The current standard assumes

that the normal distribution is close to the reference gas ................................................................. 160

Figure DD.2 – The relation between the (extreme)limit gases (ELG), the reference gas (RG), the

distribution limit gases (DLG),and the normal distribution gas(NDG) the appliance is designed

for. The DLG are to be considered if the normal distribution gas may vary to a large extent over

the lifetime of the appliance.............................................................................................................. 162

Figure EE.1 – Equivalent heating efficiency and linear extrapolation from = 0,75/CC. ....................... 165

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SIST EN 50465:2015
– 5 – EN 50465:2015
Tables

Table 1 – Mechanical properties and chemical compositions of carbon and stainless steels .................... 37

Table 2 – Minimum requirements for cast iron............................................................................................ 37

Table 3 – Parts in aluminium and aluminium alloys .................................................................................... 38

Table 4 – Parts in copper or copper alloys ................................................................................................. 38

Table 5 – Minimum thicknesses for rolled parts ......................................................................................... 38

Table 6 – Nominal minimum thicknesses of mCHP appliance sections ..................................................... 38

Table 7 – Weld joints and welding processes ............................................................................................. 39

Table 8 – Metallic combustion products circuit material specifications ...................................................... 43

Table 9 – Composition of the gas circuit ..................................................................................................... 47

Table 10 – Maximum admissible leakage rates .......................................................................................... 56

Table 11 – NO classes ............................................................................................................................... 69

Table 12 – Criteria for testing long-term resistance to thermal load ........................................................... 72

Table 13 – Criteria for testing long-term resistance to condensate exposure ............................................ 73

Table 14 – Criteria for testing resistance to condensing/non-condensing cycling ...................................... 74

Table 15 – Group sizes of internal flue diameters ...................................................................................... 74

Table 16 – Criteria for testing long-term resistance to thermal load ........................................................... 75

Table 17 – Criteria for testing-long term resistance to condensate exposure ............................................ 76

Table 18 – Weighting factor for weighting in the calculation* ........................................ 116

Table 19 – (CO ) concentration of the combustion products, in percent ................................................ 120

2 N

Table 20 – Weighting factors .................................................................................................................... 124

Table 21 – Weighting factors .................................................................................................................... 125

Table 22 – Exposure time in weeks at raised temperatures ..................................................................... 130

Table 23 – Composition of test condensate for corrosion ........................................................................ 130

Table 24 – Condensate composition, related to construction classes ...................................................... 132

Table 25 – Supplementary markings ........................................................................................................ 137

Table A.1 – Gas connections conditions in common use in the various countries ................................... 143

Table F.1 – Main symbols and abbreviations used .................................................................................. 153

Table G.1 – Category(ies), direct and indirect country(ies) of destination ................................................ 154

Table G.2 – Example 1: Possibilities for the second gas family ............................................................... 154

Table G.3 – Example 2: Possibilities for the third gas family .................................................................... 154

Table H.1 – Conversion of the emission value of NO for second family gases ....................................... 155

Table H.2 – Conversion of the emission value of NOx for third family gases ........................................... 155

Table EE.1 – Energy outputs and primary energy inputs. ........................................................................ 164

Table ZZ.1 – Clauses of this European Standard addressing essential requirements or other

provisions of EC Directives .............................................................................................................. 167

---------------------- Page: 7 ----------------------
SIST EN 50465:2015
EN 50465:2015 – 6 –
Foreword

This document (EN 50465:2015) has been prepared by CEN/CLC Joint Working Group FCGA, "Fuel cell

gas appliances".
The following dates are fixed:
• latest date by which this document has to be
(dop) 2015-10-29
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting
(dow) 2017-10-29
with this document have to be withdrawn
This document supersedes EN 50465:2008.

EN 50465:2015 includes the following significant technical changes with respect to EN 50465:2008:

– inclusion of requirements for „Stirling Engine“ and „Internal Combustion Engine“;

– modification of requirements for fuel cell heating appliances to reflect experience since the first

edition;

– partly adaptation to EN 15502-1 and EN 15502-2-1, especially to reflect the new requirements for air

proving devices;
– introduction of additional types of combustion air and flue duct systems;
– modification of the total efficiency calculation;
– modifications of NO weighting and calculation.

Micro-cogeneration is also known as micro combined heat and power [mCHP]. mCHP is an efficient way

to deliver heating, cooling and electricity. It is based on the simultaneous production of electrical and

thermal energy, both of which are used. The central and most fundamental principle of mCHP is that in

order to maximize the many benefits that arise from it, systems should be based according to the heat

demand of the application.

A fuel cell, Stirling engine and internal combustion engine are just some of the significant technologies to

be the thermal heart of a mCHP appliance.

mCHP appliances that are already established in the market are used to provide central heating and

domestic hot water in residential buildings.

Due to the development of new technology other solutions than those described in this European

Standard are possible if these solutions provide at least an equivalent level of safety.

Matters related to quality assurance systems, tests during production, and certificates of conformity of

auxiliary devices are not dealt with in this European Standard.

Due to the change in scope to include technologies in addition to fuel cells, the title of this European

Standard has been changed from “fuel cell gas heating appliance” into “combined heat and power

appliance”.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.
---------------------- Page: 8 ----------------------
SIST EN 50465:2015
– 7 – EN 50465:2015

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.The essential requirements of EC Directive 2009/142/EC relating to "rational use of energy" is

defined by the maximum quantity of energy recovered (thermal and electrical energy output) from the gas

energy input.
__________
---------------------- Page: 9 ----------------------
SIST EN 50465:2015
EN 50465:2015 – 8 –
1 Scope

This European Standard specifies the requirements and test methods for the construction, safety, fitness

for purpose, rational use of energy and the marking of a micro combined heat and power appliance;

(hereafter referred to as “mCHP appliance”).
This European Standa
...

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