kSIST FprEN 12309-1:2023
(Main)Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions
Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions
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 1 of EN 12309
This part of this European Standard specifies the terms and definitions for gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW.
Gasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW - Teil 1: Begriffe
1.1 Anwendungsbereich von EN 12309
Geräte nach diesem Dokument beinhalten eine oder eine Kombination der folgenden Funktionen:
— gasbefeuertes Sorptionskühlgerät;
— gasbefeuertes Sorptionskühl-/heizgerät;
— gasbefeuerte Sorptionswärmepumpe.
Dieses Dokument gilt für Geräte, die für die Nutzung zur Raumheizung oder -kühlung oder Kälteerzeugung mit oder ohne Wärmerückgewinnung ausgelegt sind.
Dieses Dokument gilt für Geräte mit Abgassystemen der Bauarten B und C (nach EN 1749) sowie für Geräte zur Aufstellung im Freien. EN 12309 gilt nicht für Klimaanlagen, sondern 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 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. Wärmerückgewinnung — siehe Begriffe in prEN 12309-1:2022).
Bei (aus mehreren Teilen bestehenden) Verpackungseinheiten gilt diese Norm nur, wenn diese als vollstän-dige Packung ausgelegt und geliefert werden.
EN 12309 behandelt nicht die Geräte, deren Kondensator mit Luft und durch die Verdampfung von zusätz-lichem Wasser auf der Außenseite gekühlt wird.
Anlagen für Heizung und/oder Kühlung industrieller Prozesse fallen nicht in den Anwendungsbereich von EN 12309.
Alle in diesem Text angegebenen Symbole werden unabhängig von dessen jeweiliger Sprache verwendet.
1.2 Anwendungsbereich dieses Teil 1 von EN 12309
Der vorliegende Teil dieses Dokumentes legt die Begriffe für gasbefeuerte Sorptionsgeräte für Heizung und/oder Kühlung mit einer Nennwärmebelastung nicht über 70 kW fest.
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 1 : Termes et définitions
1.1 Domaine d’application de l’EN 12309
Les appareils concernés par le présent document 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.
Le présent document s’applique aux appareils conçus pour être utilisés pour le chauffage ou le refroidissement de locaux avec ou sans récupération de chaleur.
Le présent document s’applique aux appareils comportant des systèmes d’évacuation des gaz de combustion de types B et C (conformément à l’EN 1749) et aux appareils conçus pour les installations extérieures. L’EN 12309 ne s’applique pas aux climatiseurs, elle ne s’applique 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 n’est pas au contact de l’eau ou de 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 dans le prEN 12309-1:2022).
Dans le cas des appareils fournis prêts à l’emploi (constitués de plusieurs éléments), la présente norme ne s’applique qu’à ceux conçus et fournis sous forme d’ensemble complet.
L’EN 12309 ne couvre pas les appareils ayant leur condenseur refroidi par air et par évaporation d’eau d’un circuit supplémentaire externe.
L’EN 12309 ne s’applique pas aux installations utilisées pour le chauffage et/ou le refroidissement des procédés industriels.
Tous les symboles spécifiés dans le présent document sont utilisés, quelle que soit la langue utilisée.
1.2 Domaine d’application de la présente Partie 1 de l’EN 12309
La présente partie de ce document spécifie les termes et définitions pour les appareils à sorption fonctionnant au gaz pour le chauffage et/ou le refroidissement de débit calorifique sur PCI inférieur ou égal à 70 kW.
Absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno močjo do vključno 70 kW - 1. del: Izrazi in definicije
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 12309-1:2022
01-julij-2022
Absorpcijske in adsorpcijske plinske naprave za gretje in/ali hlajenje z grelno
močjo do vključno 70 kW - 1. del: Izrazi in definicije
Gas-fired sorption appliances for heating and/or cooling with a net heat input not
exceeding 70 kW - Part 1: Terms and definitionsGasbefeuerte Sorptions-Geräte für Heizung und/oder Kühlung mit einer
Nennwärmebelastung nicht über 70 kW - Teil 1: Begriffe
Ta slovenski standard je istoveten z: prEN 12309-1
ICS:
01.040.27 Prenos energije in toplote Energy and heat transfer
(Slovarji) engineering (Vocabularies)
01.040.91 Gradbeni materiali in gradnja Construction materials and
(Slovarji) building (Vocabularies)
27.080 Toplotne črpalke Heat pumps
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
oSIST prEN 12309-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12309-1:2022
DRAFT
EUROPEAN STANDARD
prEN 12309-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2022
ICS 01.040.27; 01.040.91; 27.080; 91.140.30 Will supersede EN 12309-1:2014
English Version
Gas-fired sorption appliances for heating and/or cooling
with a net heat input not exceeding 70 kW - Part 1: Terms
and definitions
Gasbefeuerte Sorptions-Geräte für Heizung und/oder
Kühlung mit einer Nennwärmebelastung nicht über 70
kW - Teil 1: Begriffe
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12309-1:2022 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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Contents Page
European foreword ............................................................................................................................................ 3
1 Scope .......................................................................................................................................................... 4
1.1 Scope of EN 12309 ................................................................................................................................ 4
1.2 Scope of this Part 1 of EN 12309 ...................................................................................................... 4
2 Normative references .......................................................................................................................... 4
3 Terms and definitions ......................................................................................................................... 5
3.1 Appliance types ..................................................................................................................................... 5
3.2 Appliance components ........................................................................................................................ 7
3.3 Combustion products circuit .......................................................................................................... 10
3.4 Adjusting, control and safety devices .......................................................................................... 10
3.5 Operation of the appliance .............................................................................................................. 12
3.6 Gases ........................................................................................................................................................ 15
3.7 Conditions of operation, measurement and calculations .................................................... 17
Bibliography ....................................................................................................................................................... 30
Index 31---------------------- Page: 4 ----------------------
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European foreword
This document (prEN 12309-1:2022) 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 12309 1:2014.
In comparison with the previous edition, the following technical modifications have been made:
EN 12309-1:2022 gathers terms and definitions from all the other parts of EN 12309. Moreover, new
terms and definitions used in the other parts have been added and existing terms and definitions have
been updated consistently to the other parts of this standard.This document 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;
These documents will be reviewed whenever new mandates could apply.
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1 Scope
1.1 Scope of EN 12309
Appliances covered by this document include one or a combination of the following:
— gas-fired sorption chiller;— gas-fired sorption chiller/heater;
— gas-fired sorption heat pump.
This document applies to appliances designed to be used for space heating or cooling or refrigeration
with or without heat recovery.This document applies to appliances having flue gas systems of type B and C (according to EN 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 12309-1:2022).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 are used regardless of the language used.1.2 Scope of this Part 1 of EN 12309
This part of this document specifies the terms and definitions for gas-fired sorption appliances for heating
and/or cooling with a net heat input not exceeding 70 kW.2 Normative references
There are no normative references in this document.
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3 Terms and definitions
For the purposes of this document, the following terms and definitions 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 Appliance types
3.1.1
appliance
assembly of various parts according to the installation instructions, if the appliance is supplied to the
market in multiple partsNote 1 to entry: Accessories provided optionally are not to be included.
Note 2 to entry: Appliance may be supplied to be marketed in one or more than one part.
3.1.2absorption
process in which molecules of the refrigerant are dissolved into a liquid
3.1.3
adsorption
process in which molecules of the refrigerant are held at the surface of a solid (possibly porous) structure
3.1.4air-conditioners
encased assembly or assemblies designed as an appliance to provide delivery of conditioned air to an
enclosed space (room for instance) or zoneNote 1 to entry: The medium used for distribution of heating and/or cooling is exclusively air.
3.1.5bivalent appliance
encased assembly or assemblies designed and packaged which is made up of components that can be
tested separately3.1.6
chiller
encased assembly or assemblies designed as an appliance, whose primary function is delivery of cooling
only, and whose primary function is dependent on circulation of fluid (refrigerant and/or solution) within
the absorption, adsorption or refrigerant circuit(s)3.1.7
chiller/heater
encased assembly or assemblies, whose primary function is delivery of cooling and/or heating and whose
primary function of cooling is dependent on circulation of fluid (refrigerant and/or solution) within the
absorption, adsorption or refrigerant circuit(s)Note 1 to entry: The primary function of heating only uses directly or indirectly the energy delivered by the
combustion system.---------------------- Page: 7 ----------------------
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3.1.8
closed system
system in which the fluid within the refrigerant circuit (e.g. water, ammonia, etc.) providing heating or
cooling does not come into contact with the surrounding air or the heat transfer medium (e.g. water,
brine, air)3.1.9
condensing appliance
appliance in which, under normal operating conditions and at certain operating water temperatures, the
water vapour in the combustion products is partially condensed in order to make use of the latent heat
of this water vapour for heating and/or heat recovery purposes3.1.10
continuous appliance
appliance where the four phases of the sorption cycle (i.e. sorption-desorption-condensation-
evaporation) are processed continuouslyNote 1 to entry: According to this definition, each phase of the sorption cycle is processed by a specific component.
Note 2 to entry: A continuous or non-cyclical appliance can include steady-state operation mode, transient
operation mode and on-off operation mode.3.1.11
alternating appliance
appliance where sorption module(s) alternately process the sorption and the desorption phases leading
to a cyclical operationNote 1 to entry: According to this definition, the phases of the sorption cycle are shifted among the internal
components of the appliance. This concept is valid at least for the sorption module.
Note 2 to entry: An alternating or cyclical appliance can include steady-state operation mode, transient operation
mode and on-off operation mode.Note 3 to entry: the definition of alternating appliance applies to hybrid appliances with adsorption module and
adsorption appliances.3.1.12
ductless appliance
outdoor appliance which is not designed to be fitted with external ducts to transport air to, or products
of combustion away from, the appliance’s casing3.1.13
gas fired
appliance which mainly consumes gas for implementation of the function or functions, the electrical
power consumption being dedicated to auxiliaries needed for operation3.1.14
heat pump
encased assembly or assemblies designed as an appliance whose primary function is delivery of heat
and/or cooling (the primary function is dependent on circulation of fluid (refrigerant and/or solution)
within the absorption, adsorption or refrigerant circuit(s))---------------------- Page: 8 ----------------------
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3.1.15
hybrid appliance
encased assembly or assemblies utilizing at least two different technologies whose primary function is to
generate heat, including overall control system that selects, according to predefined parameters, which
technology (or combination thereof) satisfies the customers' requirements while minimizing energy
costs, consumption and/or carbon emissionsNote 1 to entry: Hybrid appliances according to the scope of this standard are based on gas fired technologies.
3.1.16monovalent appliance
encased assembly or assemblies whose primary and secondary functions are dependent on circulation of
fluid (refrigerant and/or solution) within the absorption, adsorption or refrigerant circuit(s)
3.1.17open system
system in which the fluid within the refrigerant circuit (e.g. water, etc.) providing heating or cooling
comes into direct contact with the heat transfer medium (e.g. water, air, etc.) which is to be heated or
cooled3.1.18
primary function
main purpose for which the sorption appliance is designed
Note 1 to entry: In the case of chiller, the main purpose is the cooling function; in the case of a heat pump this is the
heating function.3.1.19
packaged unit
factory assembly of components of heat pump, chiller or chiller/heater fixed on a common mounting to
form a discrete unit3.1.20
sorption
physical and chemical process by which one substance becomes attached to another, that can be
absorption or adsorption3.1.21
sorption appliance
appliance which use the physical and chemical process by which one substance becomes attached to
another to generate heat and/or coolingNote 1 to entry: The medium used for distribution of heating and/or cooling is liquid.
3.2 Appliance components3.2.1
aeration adjuster
device enabling the air to be set at the desired value according to the supply conditions
3.2.2brine
liquid that has a freezing point depressed relative to water
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3.2.3
gas circuit
part of the appliance that conveys or contains the gas between the appliance gas inlet connection and the
burner(s)3.2.4
gas inlet connection
part of the appliance intended to be connected to the gas supply
3.2.5
gas rate adjuster
component allowing an authorized person to set the gas rate of the burner to a predetermined value
according to the supply conditionsNote 1 to entry: Adjustment may be progressive (screw adjuster) or in discrete steps (by changing restrictors).
Note 2 to entry: The adjusting screw of an adjustable pressure regulator is regarded as a rate adjuster.
3.2.6heat recovery
energy rejected by the appliance whose primary control is in the cooling mode is collected by means of
an additional heat exchanger (e.g. a chiller with an additional condenser or absorber)
3.2.7heat transfer medium
any medium (e.g. air, water, brine, etc.) used for the transfer of heat to or from refrigerant-containing
parts of the applianceNote 1 to entry: The medium may be
– the cooling medium circulating in the evaporator,
– the cooling medium circulating in the condenser and/or absorber and/or flue gas heat exchanger,
– the heat recovery medium circulating in the heat recovery heat exchanger.3.2.8
ignition burner
burner whose flame is intended to ignite another burner
3.2.9
ignition device
any means (flame, electrical ignition device or other device) used to ignite the gas at the ignition burner
or at the main burnerNote 1 to entry: This device can operate intermittently or permanently.
3.2.10
indoor heat exchanger
heat exchanger which is designed to transfer heat to the indoor part of the building or to the indoor hot
water supplies or to remove heat from theseNote 1 to entry: In the case of heat pumps operating in cooling mode, this is the evaporator. In the case of heat
pumps operating in heating mode, this is the condenser.---------------------- Page: 10 ----------------------
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3.2.11
injector
component that admits the gas into a burner
3.2.12
main burner
burner that is intended to assure the thermal function of the appliance and is generally called “the burner”
3.2.13mechanical joint
means of assuring the soundness of an assembly of several (generally metallic) parts without the use of
liquids, pastes, tapes, etcNote 1 to entry: The means are, for example:
— metal to metal joints;
— conical joints;
— toroidal sealing rings (“O” rings);
— flat joints.
3.2.14
outdoor heat exchanger
heat exchanger which is designed to remove heat from the outdoor ambient environment, or any other
available heat source, or to transfer heat to itNote 1 to entry: In the case of heat pumps operating in cooling mode, this is the condenser. In the case of heat
pumps operating in heating mode, this is the evaporator.Note 2 to entry: Both the heating and cooling functions of the sorption appliance may be classed as primary
functions if they satisfy the rational use of energy requirements for those functions.
3.2.15out of service
procedure by which a control, adjuster or regulator (temperature, pressure, etc.) is put out of action and
sealed in this position3.2.16
restrictor
part with an orifice, which is placed in the gas circuit so as to create a pressure drop and thus reduce the
gas pressure at the burner to a predetermined value for a given supply pressure and rate
3.2.17sealing an adjuster
procedure by which an adjuster is set so that changing the setting of the adjuster breaks the sealing
material and makes the interference with the adjuster apparentNote 1 to entry: A factory sealed adjuster is considered to be non-existent.
Note 2 to entry: A regulator is considered to be non-existent if it has been factory sealed in the fully opened
position.---------------------- Page: 11 ----------------------
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3.2.18
secondary function
optional function of the sorption appliance, such as heating or cooling, which is not expected to satisfy
the rational use of energy requirements of a primary function3.2.19
setting an adjuster
procedure by which an adjuster is immobilized in a position by some means (e.g. screw)
3.3 Combustion products circuit3.3.1
combustion chamber
enclosure inside which combustion of the air/gas mixture takes place
3.3.2
draught diverter
device placed in the combustion products circuit to reduce the influence of flue pull and prevent down
draught affecting the burner performance and combustion3.3.3
flue outlet
part of the appliance that connects with a duct to evacuate the products of combustion
3.3.4flue terminal
device fitted at the end of the duct system that enables the discharge of flue gases and may, at the same
time, allow entry of combustion air3.4 Adjusting, control and safety devices
3.4.1
adjustable pressure regulator
regulator provided with means for changing the outlet pressure setting
3.4.2
automatic burner control system
system comprising at least a programming unit and all the elements of a flame detector device
3.4.3automatic shut-off valve
device that automatically opens, closes or varies the gas rate on a signal from the control circuit and/or
the safety circuit3.4.4
control thermostat
device controlling the operation of the appliance by on/off, high/low or modulating control and enabling
the temperature to be kept automatically, within a given tolerance, at a predetermined value
3.4.5fan delay control
control that starts and/or stops the air delivery fan when the temperature of the delivered air reaches a
certain predetermined value---------------------- Page: 12 ----------------------
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3.4.6
flame detector device
device by which the presence of a flame is detected and signalled
3.4.7
flame signal
signal given by the flame detector device, normally when the flame sensor senses a flame
3.4.8flame simulation
condition that occurs when the flame signal indicates the presence of a flame when in reality no flame is
present3.4.9
flame supervision device
device that, in response to a signal from the flame detector, keeps the gas supply open and shuts it off in
the absence of the supervised flame3.4.10
high/low control
automatic system that permits an appliance to operate either at the nominal heat input or at a fixed
reduced heat input3.4.11
modulating control
automatic system by which the heat input of the appliance is adjusted continuously between the nominal
heat input and a minimum value3.4.12
overheat control device
component that shuts off and locks out the gas supply before the appliance is damaged and/or before
safety is put into question, and that automatically resets3.4.13
overheat cut-off device
component that shuts off and locks out the gas supply before the appliance is damaged and/or before
safety is put into question, and that requires manual intervention to restore the gas supply
3.4.14pressure regulator
device that maintains the outlet pressure constant independent on the variations in inlet pressure and/or
flow rate within defined limitsNote 1 to entry: The term “regulator” is used in this case for a volume regulator.
3.4.15program
sequence of control operations determined by the programming unit involving switching on, starting up,
supervising and switching off the burner---------------------- Page: 13 ----------------------
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3.4.16
programming unit
unit which reacts to signals from control and safety devices, gives control commands, controls the start-
up sequence, supervises the burner operation and causes controlled shut-down and, if necessary, safety
shut-down and lock-outNote 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in
conjunction with a flame detector device.3.4.17
range rating device
component in the appliance intended to be used to adjust the heat input of the appliance, within a range
of heat inputs stated in the operating instructions, to suit the actual heat requirements of the installation
Note 1 to entry: This adjustment may be progressive (e.g. by use of a screw adjuster) or in discrete steps (e.g. by
changing restrictors).3.4.18
spillage monitoring system
system which contains a device that automatically shuts off the gas supply to the main burner, and
perhaps the ignition burner, when there is a release of combustion products from the appliance
3.4.19temperature sensor
component that detects the temperature of the environment to be supervised or controlled
3.5 Operation of the appliance3.5.1
automatic burner system
process by which, when starting from the completely shut-down condition, the gas is ignited and the
flame is detected and proved without manual intervention3.5.2
automatic recycling
process by which, following loss of flame signal during the running condition or accidental interruption
of the operation of the appliance, the gas supply is interrupted and the complete start sequence is
automatically re initiatedNote 1 to entry: This process ends with the restoration of the running condition or, if there is no flame signal at the
end of the safety time, or if the cause of the accidental interruption has not disappeared, with volatile lock out or
non-volatile lock out.3.5.3
controlled shut-down
process by which the power to the gas shut off valve(s) is removed immediately, e.g. as a result of the
action of a controlling function---------------------- Page: 14 ----------------------
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3.5.4
cyclical operation
mode of operation leading to a cyclic shutdown of the burner due to the variation of the heating or cooling
demandNote 1 to entry: According to this definition, a transient operation is not considered as a cyclical operation.
Note 2 to entry: A cyclical operation can include or exclude a defrost period. A non-cyclical operation can also
include a defrost period.3.5.5
defrost mode
state of the appliance in the heating mode where the operation is modified or reversed to de-ice the
outdoor heat exchanger3.5.6
extinction safety time
interval between extinction of the supervised flame and the gas supply being shut off:
— to the main burner;— and/or to the ignition burner
3.5.7
first safety time
interval between the ignition burner gas valve, start gas valve or main gas valve, as applicable, being
energized and that valve being de-energized if the flame detector signals the absence of a flame at the end
of this interval3.5.8
flame stability
characteristic of flames that remain on the burner ports or in the flame reception zone intended by the
construction3.5.9
flame lift
total or partial lifting of the base of the flame away from the burner port or the flame reception zone
provided by the designNote 1 to entry: Flame lift may cause the flame to blow out, i.e. extinction of the air gas mixture.
3.5.10full load
operation state providing maximum useful capacity under given conditions
3.5.11
ignition interlock
part that prevents the operation of the igniter as long as the main gasway is open
3.5.12ignition opening time
interval between ignition of the supervised flame and the moment when the valve is held open
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3.5.13
ignition safety time
interval between the order to open and the order to close the gas supply to the burner in the event of
ignition3.5.14
light-back
entry of a flame into the body of the burner
3.5.15
non-volatile lock-out
safety shut-down condition of the system, such that a restart is only accomplished by a manual reset of
the system and by no other means3.5.16
re-start interlock
mechanism which prevents the re-opening of the gasway to the main burner or the main burner and the
ignition burner until the armature plate has separated from the magnetic element3.5.17
safety shut-down
process which is effected immediately following the response of a safety limiter or sensor or the detection
of a fault in the burner control system and which puts the burner out of operation by immediately
removing the power to the gas shut-off valve(s) and the ignition device3.5.18
second safety time
interval between the main gas valve being energized and the main gas valve being de-energized if the
flame detector signals the absence of a flame at the end of this intervalNote 1 to entry: It occurs where there is a first safety time applicable to either an ignition burner or start gas flame
only.3.5.19
sooting
phenomenon appearing during incomplete combustion and characterized by deposits of soot on the
surfaces or parts in contact with the combustion products or with the flame3.5.20
spark restoration
process by which, after disappearance of the flame signal in the running condition, the ignition device is
energized again without the gas supply having been totally interrupted; this process ends with the
restoration of the running condition or, if there is no flame signal at the end of the safety time, with
volatile or non-volatile lock out3.5.21
steady state operation
for non cyclical operation, period of operation where all measured quantities remain constant according
to allowed deviations without having to alter the set valuesNote 1 to entry: For alternating appliances this could mean a wide value range to allow for the cyclic nature of the
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oSIST prEN 12309-1:2022
prEN 12309-1:2022 (E)
3.5.22
transient operation
mode of operation of air to liquid (e.g. water, brine, etc.) heat pump leading to disrespect the permissible
deviation required for steady state operation due to icing of the evaporator3.5.23
ignition flame
flame established at the ignition rate either at the main burner or at a separate ignition burner
3.5.24volatile lock-out
safety shut down condition of the system, such that a restart is only accomplished either by the manual
reset of the system, or by an interruption of the electrical supply and its subsequent restoration
3.5.25yellow tipping
colour change of th
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