EN 12309-7:2014

Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 7: Specific provisions for hybrid appliances

1.1   Scope of EN 12309
Appliances covered by this European Standard include one or a combination of the following:
-   gas-fired sorption chiller;
-   gas-fired sorption chiller/heater;
-   gas-fired sorption heat pump.
This European Standard applies to appliances designed to be used for space heating or cooling or refrigeration with or without heat recovery.
This European Standard applies to appliances having flue gas systems of type B and C (according to CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air conditioners, it only applies to appliances having:
-   integral burners under the control of fully automatic burner control systems,
-   closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated,
-   mechanical means to assist transportation of the combustion air and/or the flue gas.
The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in prEN 12309 1:2012).
In the case of packaged units (consisting of several parts), this standard applies only to those designed and supplied as a complete package.
The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309.
Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.
All the symbols given in this text should be used regardless of the language used.
1.2   Scope of this Part 7 of EN 12309
This part of EN 12309 deals particularly with the specific provisions of hybrid heating appliances based on gas-driven sorption heat pumps as defined in Part 1.
The heating appliances covered by this European Standard are of a hybrid type, an encased assembly or assemblies combining a direct or indirect-fired sorption heat pump for base load and a peak load condensing boiler with only one flue system, electrical supply cable and human machine interface to the end user. The direct- or indirect-fired sorption heat pump integrated in the hybrid appliances in this European Standard could be intermittent or continuously operating ab or adsorption heat pump.
The control system of hybrid heating appliances decides on the transition between the heat pump operation mode to/from the mixed operation mode (heating by both sorption heat pump as well as the peak boiler) and the direct heating mode (only peak boiler) depending on the heating fluid inlet or return temperature, temperature of brine entering the indoor heat exchanger (evaporator) of the heat pump, the required outlet or supply temperature dependent on the outdoor temperature as well as the target value of the indoor or room temperature. Upon transition from the heat pump operation mode to the mixed operation mode, the control system decides also on the degree of mixing based on the above mentioned parameters.

Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW - Teil 7: Spezifische Bestimmungen für Hybridanlagen

1.1   Anwendungsbereich der EN 12309
Geräte nach dieser Europäischen Norm beinhalten eine oder eine Kombination der folgenden Funktionen:
-   gasbefeuertes Sorptionskühlgerät;
-   gasbefeuertes Sorptionskühl-/heizgerät;
-   gasbefeuerte Sorptionswärmepumpe.
Diese Europäische Norm gilt ausschließlich für Geräte für die Raumheizung oder  kühlung mit oder ohne Wärmerück¬gewinnung.
Diese Europäische Norm gilt für Geräte mit Abgassystemen der Bauarten B und C (nach CEN/TR 1749) sowie für Geräte zur Aufstellung im Freien. EN 12309 gilt nicht für Klimaanlagen, sie gilt ausschließlich für Geräte mit:
-   integrierten Brennern, gesteuert mittels Feuerungsautomaten;
-   geschlossenen Kühlkreislaufsystemen, in denen das Kühlmittel nicht direkt mit dem/der zu kühlenden oder zu erwärmenden Wasser/Sole oder Luft in Berührung kommt;
-   mechanischen Einrichtungen zur Unterstützung der Verbrennungsluft- und/oder Abgasabführung.
Die vorstehenden Geräte können eine oder mehrere Primär- oder Sekundärfunktion(en) haben (d. h. Wärme-rückgewinnung — siehe Begriffe nach prEN 12309 1:2012).
Bei (aus mehreren Teilen bestehenden) Verpackungseinheiten gilt diese Europäische Norm nur, wenn diese als vollständige Baugruppe ausgelegt und geliefert werden.
EN 12309 behandelt nicht die Geräte, deren Kondensator mit Luft oder durch Verdampfung von zusätzlichem Wasser auf der Außenseite gekühlt wird.
Anlagen für Heizung und/oder Kühlung industrieller Prozesse fallen nicht in den Anwendungsbereich der EN 12309.
Alle in diesem Text angegebenen Symbole sollten unabhängig von dessen jeweiliger Sprache verwen¬det werden.
1.2   Anwendungsbereich des Teil 7 der EN 12309
Der vorliegende Teil der EN 12309 behandelt insbesondere spezifische Vorschriften für Hybridheizgeräte auf der Grundlage von gasbefeuerten Sorptionswärmepumpen, wie es in Teil 1 definiert ist.
Die von dieser Europäischen Norm abgedeckten Heizgeräte sind Hybridgeräte, eine eingehauste Baueinheit oder eine Baugruppe, die eine direkte oder indirekte befeuerte Sorptionswärmepumpe für die Grundlast und einen Brennwertspitzenlastkessel mit nur einer Abgasanlage, Stromanschluss und Mensch-Maschine-Schnittstelle für den Endbenutzer kombiniert. Die in dieser Norm im Hybridgerät direkt oder indirekt beheizte Sorptionswärmepumpe könnte eine intermittierende oder kontinuierlich arbeitende Ab- oder Adsorptionswärmepumpe sein.
Das Steuersystem der Hybridheizgeräte entscheidet über den Übergang zwischen dem Wärmepumpenbetriebsmodus auf/von dem Mischbetrieb (Heizen mit sowohl Sorptionswärmepumpe sowie dem Spitzenkessel) und dem direkten Heizmodus (nur Spitzenkessel), je nach Temperatur des Wärmeträgers am Eintritt oder Austritt, der Temperatur der Sole, die in den Innenwärmeübertrager (Verdampfer) der Wärmepumpe eintritt, die erforderliche Austritts oder Eintrittstemperatur in Abhängigkeit von der Außentemperatur sowie dem Sollwert der Innenraumtemperatur. Beim Übergang vom Wärmepumpenbetriebsmodus in den Mischbetrieb entscheidet das Steuerungssystem auch über den Mischungsgrad auf der Grundlage der oben erwähnten Parameter.

Appareils à sorption fonctionnant au gaz pour le chauffage et/ou le refroidissement de débit calorifique sur PCI inférieur ou égal à 70 kW - Partie 7 : Dispositions spécifiques pour les appareils hybrides

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

Absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW - 7. del: Posebne zahteve za hibridne naprave

Področje uporabe standardov EN 12309
Naprave, zajete v standardu EN 12309, vključujejo eno ali več kombinacij naslednjih elementov:
–  absorpcijske in adsorpcijske plinske naprave za hlajenje;
–  absorpcijske in adsorpcijske plinske naprave za hlajenje/gretje;
–  absorpcijske in adsorpcijske plinske toplotne črpalke.
EN 12309 se uporablja za naprave le, če se uporablja za segrevanje in hlajenje prostora z rekuperacijo toplote ali brez nje. Naprave so lahko monovalentne, dvovalentne ali hibridne.
EN 12309 se uporablja za naprave z odpadnimi plini vrste B in C (v skladu s CEN/TR 1749) in naprave, namenjene zunanji namestitvi. EN 12309 se uporablja za naprave, ki lahko imajo eno ali dve cevi.
EN 12309 se uporablja le za naprave z
–  integralnimi gorilniki s popolnoma avtomatskim sistemom kontrole,
–  hladilnimi tokokrogi z zaprtim sistemom, pri katerih hladilno sredstvo ne pride v neposreden stik z vodo ali zrakom, ki se ohlaja ali segreva,
–  mehaničnimi sredstvi za pomoč pri transportu zraka za gorenje in/ali odpadnega plina.
Zgornje naprave lahko imajo eno ali več primarnih ali sekundarnih funkcij (tj. rekuperacija toplote – glej opredelitve iz standarda prEN 12309 1:2012), pri čemer se EN 12309 uporablja za vse take funkcije, pod pogojem, da je zadevna funkcija odvisna od kroženja tekočine (hladilnega sredstva in/ali raztopine) v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine.
OPOMBA 1 Vsaka funkcija naprave, ki ni odvisna od kroženja tekočine v tokokrogu(-ih) absorpcije, adsorpcije ali hladilne tekočine, naj bi se ocenila ločeno.
EN 12309 se uporablja za vse naprave, za katere naj bi se izvajal tipski preskus. Zahteve za naprave, za katere se ne izvaja tipski preskus, bi bilo treba dodatno proučiti.
Pri pakiranih enotah (sestavljenih iz več kosov) se EN 12309 uporablja samo za tiste, ki so projektirane in dostavljene kot celoten paket.
EN 12309 se ne uporablja za klimatske naprave.
EN 12309 ne zajema naprav, katerih kondenzator se hladi z zrakom in z izhlapevanjem zunanje dodatne vode.
Inštalacije, uporabljene za gretje in/ali hlajenje industrijskih procesov, niso zajete v standardu EN 12309.
OPOMBA 2 Vsi simboli v tem besedilu naj bi se uporabljali ne glede na uporabljen jezik.
Področje uporabe tega 7. dela standarda EN 12309
Ta del standarda EN 12309 določa posebne zahteve za hibridne naprave za absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW.
Ta del standarda EN 12309 obravnava zlasti posebne zahteve za novo uvedene hibridne naprave za gretje na podlagi absorpcijskih in adsorpcijskih plinskih naprav, kot je opredeljeno v 1. delu in obsežno opisano v odstavku 4.1 tega dokumenta.

General Information

• Status: Published
• Publication Date: 16-Dec-2014
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• ICS: 27.080 - Heat pumps
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 299 - Gas-fired sorption appliances and domestic gas-fired washing and drying appliances
• Drafting Committee: CEN/TC 299/WG 2 - Gas-fired sorption appliances
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 24-Jul-2020
• Directive: 2009/142/EC - DIRECTIVE 2009/142/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 relating to appliances burning gaseous fuels
• Directive: 811/2013 - 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 heater, temperature control and solar device and packages of combination heater, temperature control and solar device
• 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/495 - Standardisation mandate to CEN, CENELEC and ETSI under Directive 2009/125/EC relating to harmonised standards in the field of Ecodesign
• 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/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: SIST EN 12309-7:2015 - Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 7: Specific provisions for hybrid appliances

Relations

• Replaces: EN 12309-2:2000 - Gas-fired absorption and adsorption air-conditioning and/or heat pump appliances with a net heat input not exceeding 70 kW - Part 2: Rational use of energy
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2015
1DGRPHãþD
SIST EN 12309-2:2001
$EVRUSFLMVNHLQDGVRUSFLMVNHSOLQVNHQDSUDYH]DJUHWMHLQDOLKODMHQMH]JUHOQR
UDYHPRþMRGRYNOMXþQRN:GHO3RVHEQH]DKWHYH]DKLEULGQHQDS
Gas-fired sorption appliances for heating and/or cooling with a net heat input not
exceeding 70 kW - Part 7: Specific provisions for hybrid appliances
Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer
Nennwärmebelastung nicht über 70 kW - Teil 7: Spezifische Bestimmungen für
Hybridanlagen
Appareils à sorption à chauffage direct au gaz pour chauffage et/ou refroidissement d'un
débit calorifique sur PCI inférieur à 70 kW - Partie 7: Dispositions spécifiques pour les
appareils hybrides
Ta slovenski standard je istoveten z: EN 12309-7:2014
ICS:
27.080 7RSORWQHþUSDONH Heat pumps
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 12309-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2014
ICS 27.080; 91.140.30 Supersedes EN 12309-2:2000
English Version
Gas-fired sorption appliances for heating and/or cooling with a
net heat input not exceeding 70 kW - Part 7: Specific provisions
for hybrid appliances
Appareils à sorption fonctionnant au gaz pour le chauffage Gasbefeuerte Sorptions-Geräte für Heizung und/oder
et/ou le refroidissement de débit calorifique sur PCI inférieur Kühlung mit einer Nennwärmebelastung nicht über 70 kW -
ou égal à 70 kW - Partie 7 : Dispositions spécifiques pour Teil 7: Spezifische Bestimmungen für Hybridanlagen
les appareils hybrides
This European Standard was approved by CEN on 18 October 2014.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12309-7:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .5
1.1 Scope of EN 12309 .5
1.2 Scope of this Part 7 of EN 12309 .5
2 Normative references .6
3 Terms and definitions .6
4 Test conditions .6
4.1 General .6
4.2 Inlet temperatures of the indoor heat exchanger .8
4.3 Inlet temperatures into the outdoor heat exchanger .9
4.3.1 Air to water hybrid heating appliance.9
4.3.2 Ground water sourced hybrid heating appliances . 10
4.3.3 Ground heat sourced hybrid heating appliances . 10
4.3.4 Solar sourced hybrid heating appliances . 10
5 Calculation of the seasonal performance in the heating mode . 11
6 Standard rating conditions of gas driven sorption heat pump based hybrid heating
appliances . 11
Annex A (informative) Estimation of the heating fluid inlet and outlet temperature into/out of the
indoor heat exchanger . 14
Annex B (informative) Inlet temperature into the outdoor heat exchanger for ground heat
sourced sorption heat pump based hybrid heating appliances . 15
Annex C (informative) Inlet temperature into the outdoor heat exchanger for solar sourced
sorption heat pump based hybrid heating appliances . 17
Annex D (informative) Inlet temperature of the outdoor heat exchanger for solar collector
assisted sorption heat pump based hybrid heating appliances . 18
D.1 Introduction . 18
D.2 Solar-assisted ground sourced gas-driven sorption heat pumps . 18
D.3 Solar-assisted air sourced gas-driven sorption heat pumps . 18
Annex E (informative) Calculation of the seasonal gas utilization efficiency with partial heat
demand coverage by the applied solar collectors . 19
Annex F (informative) Estimation of the seasonal performance of hybrid heating appliances at
building design loads deviating from the appliance's nominal heating capacity . 20
Annex G (normative) Calculation of the seasonal space heating energy efficiency for hybrid gas-
driven sorption heat pump based heating appliances . 21
Annex ZA (informative) Relationship between this European Standard and the requirements of
Commission Regulation (EC) No 813/2013 . 24
Annex ZB (informative) Relationship between this European Standard and the requirements of
Commission Regulation (EC) No 811/2013 . 25
Bibliography . 26

Foreword
This document (EN 12309-7:2014) has been prepared by Technical Committee CEN/TC 299 “Gas-fired
sorption appliances, indirect fired sorption appliances, gas-fired endothermic engine heat pumps and domestic
gas-fired washing and drying appliances”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2015, and conflicting national standards shall be withdrawn at
the latest by June 2015.
This document supersede EN 12309-2:2000.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA and Annex ZB, which are integral parts of this
document.
This standard comprises the following parts under the general title, Gas-fired sorption appliances for heating
and/or cooling with a net heat input not exceeding 70 kW:
— Part 1: Terms and definitions;
— Part 2: Safety;
— Part 3: Test conditions;
— Part 4: Test methods;
— Part 5: Requirements;
— Part 6: Calculation of seasonal performances;
— Part 7: Specific provisions for hybrid appliances;
— Part 8: Environmental aspects.
EN 12309-1 and EN 12309-2 supersede EN 12309-1:1999, whereas EN 12309-1, EN 12309-3, EN 12309-4,
EN 12309-5, EN 12309-6, and EN 12309-7 supersede EN 12309-2:2000.
EN 12309-1, EN 12309-2, EN 12309-3, EN 12309-4, EN 12309-5, EN 12309-6, and EN 12309-7 have been
prepared to address the essential requirements of the European Directive 2009/142/EC relating to appliances
burning gaseous fuels (see Annex ZA of prEN 12309-2:2013 for safety aspects and Annex ZA of
EN 12309-5:2014 for rational use of energy aspects).
These documents are linked to the Energy Related Products Directive (2009/125/EC) in terms of tests
conditions, tests methods and seasonal performances calculation methods under Mandate M/495 (see
EN 12309-3:2014, Annex ZA; EN 12309-4:2014, Annex ZA; EN 12309-6:2014, Annex ZA and EN 12309-
7:2014, Annex ZA and prEN 12309-2:2013, Annex ZB and EN 12309-5:2014, Annex ZB).
These documents will be reviewed whenever new mandates could apply.
EN 12309-8 (“Environmental aspects”) deals with the incorporation of the Resolution BT 27/2008 regarding
CEN approach on addressing environmental issues in product and service standards.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
1 Scope
1.1 Scope of EN 12309
Appliances covered by this European Standard include one or a combination of the following:
— gas-fired sorption chiller;
— gas-fired sorption chiller/heater;
— gas-fired sorption heat pump.
This European Standard applies to appliances designed to be used for space heating or cooling or
refrigeration with or without heat recovery.
This European Standard applies to appliances having flue gas systems of type B and C (according to
CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air
conditioners, it only applies to appliances having:
— integral burners under the control of fully automatic burner control systems,
— closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water
or air to be cooled or heated,
— mechanical means to assist transportation of the combustion air and/or the flue gas.
The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see
definitions in EN 12309-1:2014).
In the case of packaged units (consisting of several parts), this standard applies only to those designed and
supplied as a complete package.
The appliances having their condenser cooled by air and by the evaporation of external additional water are
not covered by EN 12309.
Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.
All the symbols given in this text should be used regardless of the language used.
1.2 Scope of this Part 7 of EN 12309
This part of EN 12309 deals particularly with the specific provisions of hybrid heating appliances based on
gas-driven sorption heat pumps as defined in Part 1.
The heating appliances covered by this European Standard are of a hybrid type, an encased assembly or
assemblies combining a direct or indirect-fired sorption heat pump for base load and a peak load condensing
boiler with only one flue system, electrical supply cable and human machine interface to the end user. The
direct- or indirect-fired sorption heat pump integrated in the hybrid appliances in this European Standard could
be intermittent or continuously operating ab or adsorption heat pump.
The control system of hybrid heating appliances decides on the transition between the heat pump operation
mode to/from the mixed operation mode (heating by both sorption heat pump as well as the peak boiler) and
the direct heating mode (only peak boiler) depending on the heating fluid inlet or return temperature,
temperature of brine entering the indoor heat exchanger (evaporator) of the heat pump, the required outlet or
supply temperature dependent on the outdoor temperature as well as the target value of the indoor or room
temperature. Upon transition from the heat pump operation mode to the mixed operation mode, the control
system decides also on the degree of mixing based on the above mentioned parameters.
---------------------- Pa
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