Room sealed storage water heaters for the production of sanitary hot water using LPG for vehicles and boats

This European Standard defines the specifications and test methods for the construction, safety, rational use of energy and fitness for purpose, environment, classification and marking of room sealed storage water heaters for the production of sanitary hot water using LPG for:
   vehicles as defined in article 1 of Directive 70/156/EEC (see 3.12);
   caravan holiday homes;
   agricultural, forestry and mobile machinery, and
   boats;
hereafter called "appliance".
This standard applies to appliances:
   type C1, C3 and C5 (room sealed, see CEN/TR 1749) with combustion air intake and outlet for the products of combustion (combined or not) in the wall or roof;
   fitted with atmospheric burners;
   appliances fitted with or without a fan on the combustion circuit;
   using LPG at the pressure I3BP(30) indicated in EN 437, (for caravan holiday homes and boats see Annex A);
   of nominal heat input not exceeding 7 kW (Hi);
   appliances whether connected to the water mains pressure or on board water supply;
   appliances using, where appropriate, 12 V or 24 V DC electrical supply (or appliances with an additional 230 V heating element).
This standard does not contain all the necessary requirements for:
   appliances which fulfil a dual purpose role of space heating and heating water for sanitary hot water use.
This standard covers type testing only.
NOTE 1   Alternatively appliances (storage water heaters) for caravan holiday homes may comply with EN 89.
NOTE 2   For space heating aspects see EN 624 "Specification for dedicated LPG appliances - Room sealed LPG space heating equipment for installation in vehicles and boats".

Raumluftunabhängige, flüssiggasbeheizte Vorrats-Wasserheizer für den sanitären Gebrauch für Fahrzeuge und Boote

Diese Europäische Norm definiert die Festlegungen und die Prüfverfahren für Konstruktion, Sicherheit, rationelle Energieverwendung und Eignung zum Gebrauch, Umweltgesichtspunkte, Einteilung und Kennzeichnung von raumluftunabhängigen, flüssiggasbeheizten Vorrats-Wasserheizern zur Produktion von warmem Wasser zum Sanitärgebrauch für:
-   Fahrzeuge wie in Artikel 1 der Richtlinie 70/156/EWG definiert;
-   Mobilheime;
-   land- und forstwirtschaftliche und mobile Maschinen. Und
-   Boote,
nachfolgend "Boiler" genannt.
Diese Norm betrifft Boiler:
-   Typ C (raumluftunabhängig, siehe CR 1749);
-   ausgestattet mit atmosphärischen Brennern;
-   Boiler mit einem Gebläse im Verbrennungskreislauf;
-   Die Flüssiggas mit einem Druck von I3BP(30) wie in EN 437 angegeben verwenden, (für Mobilheime und Boote siehe Anhang A);
-   Mit einer Nennwärmebelastung von nicht mehr als 14 kW (Hi);
-   Boiler, die an entweder eine externe Wasserleitung, oder an die Bordversorgung angeschlossen sind;
-   Boiler, die wo erforderlich, 12 V oder 24 V Gleichstromanschluss nutzen.
Diese Norm enthält nicht alle notwendigen Anforderungen für:
-   Geräte, die beide Aufgaben erfüllen für Raumheizung und Wasserheizung für den Sanitärgebrauch.
ANMERKUNG 1   Alternativ können Boiler (Vorratswasserheizer) für Mobilheime der EN 89 entsprechen.
ANMERKUNG 2   Für Aspekte der Raumheizung siehe EN 624 "Raumluftunabhängige Flüssiggas-Raumheizgeräte zum Einbau in Fahrzeugen und Booten".

Appareils de production d'eau chaude par accumulation a circuit étanche pour usages sanitaires utilisant les combustibles GPL pour les véhicules et bateaux

La présente Norme européenne définit les spécifications et les méthodes d'essai relatives a la construction, la sécurité, l'utilisation rationnelle de l'énergie et l'aptitude a la fonction, l'environnement, la classification et le marquage des appareils de production d'eau chaude par accumulation a circuit étanche pour usage sanitaire utilisant les combustibles GPL pour :
-   les véhicules tels que définis a l'article 1 de la Directive 70/156/CEE (Voir 3.12) ;
-   les résidences mobiles ;
-   les machines agricoles et sylvicoles mobiles ; et
-   les bateaux ;
désignés ci-apres par le terme "appareil".
La présente norme s'applique aux appareils :
-   de type C1, C3 et C5 (a circuit étanche, voir CEN/TR 1749) comportant une amenée d'air de combustion et une évacuation des produits de combustion (combinées ou non) dans le mur ou la toiture ;
-   équipés de bruleurs atmosphériques ;
-   équipés ou non d'un ventilateur dans le circuit de combustion ;
-   utilisant les combustibles GPL a la pression I3BP(30) indiquée dans l'EN 437 (pour les résidences mobiles et les bateaux, voir l'Annexe A) ;
-   de débit calorifique nominal inférieur ou égal a 7 kW (Hi) ;
-   raccordés soit au réseau de canalisations d'eau sous pression, ou au circuit d'alimentation en eau du véhicule ou du bateau ;
-   utilisant, le cas échéant, une alimentation électrique de 12 V ou 24 V cc (ou aux appareils avec un élément chauffant complémentaire a 230V).
La présente norme ne contient pas toutes les exigences nécessaires pour :
-   les appareils combinant la fonction de radiateur indépendant et de production d'eau chaude pour usage sanitaire.
NOTE 1   Alternativement, les appareils (appareils de production d'eau chaude par accumulation) destinés aux résidences mobiles peuvent satisfaire a l'EN 89.

Akumulacijski grelniki z zunanjim zajemom zraka na utekočinjeni naftni plin za pripravo sanitarne tople vode v vozilih in čolnih

General Information

Status
Published
Publication Date
31-Jan-2007
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Feb-2007
Due Date
01-Feb-2007
Completion Date
01-Feb-2007

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Room sealed storage water heaters for the production of sanitary hot water using LPG for vehicles and boatsAppareils de production d'eau chaude par accumulation a circuit étanche pour usages sanitaires utilisant les combustibles GPL pour les véhicules et bateauxRaumluftunabhängige, flüssiggasbeheizte Vorrats-Wasserheizer für den sanitären Gebrauch für Fahrzeuge und BooteTa slovenski standard je istoveten z:EN 15033:2006SIST EN 15033:2007en,fr,de97.100.20ICS:SLOVENSKI

STANDARDSIST EN 15033:200701-februar-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15033November 2006ICS 97.100.20 English VersionRoom sealed storage water heaters for the production ofsanitary hot water using LPG for vehicles and boatsAppareils de production d'eau chaude par accumulation àcircuit étanche pour usages sanitaires utilisant lescombustibles GPL pour les véhicules et bateauxRaumluftunabhängige, flüssiggasbeheizte Vorrats-Wasserheizer für den sanitären Gebrauch für Fahrzeugeund BooteThis European Standard was approved by CEN on 18 September 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15033:2006: E

EN 15033:2006 (E) 2 Contents Page Foreword..............................................................................................................................................................4 1 Scope......................................................................................................................................................5 2 Normative references............................................................................................................................6 3 Terms and definitions...........................................................................................................................7 3.1 Water heater...........................................................................................................................................7 3.2 Characteristics of the gas and electrical supplies.............................................................................7 3.3 gas circuit...............................................................................................................................................8 3.4 Control and safety devices...................................................................................................................8 3.5 Stages of operational and safety sequence........................................................................................9 3.6 Burners and ignition devices.............................................................................................................10 3.7 combustion circuit...............................................................................................................................11 3.8 Water circuit.........................................................................................................................................12 3.9 Soundness............................................................................................................................................12 3.10 Operation..............................................................................................................................................12 3.11 Appliance characteristics...................................................................................................................15 4 Classification of storage water heaters.............................................................................................16 4.1 Type C...................................................................................................................................................16 5 Construction requirement...................................................................................................................17 5.1 General..................................................................................................................................................17 5.2 Adjusting, control and safety devices...............................................................................................21 5.3 Burners.................................................................................................................................................25 5.4 Discharge of condensate....................................................................................................................25 6 Operational requirements and tests..................................................................................................26 6.1 Carrying out the tests..........................................................................................................................26 6.2 Vibration resistance............................................................................................................................29 6.3 Soundness............................................................................................................................................29 6.4 Nominal heat input...............................................................................................................................31 6.5 Temperatures.......................................................................................................................................33 6.6 Ignition - Cross-lighting - Flame stability..........................................................................................35 6.7 Resistance to wind..............................................................................................................................38 6.8 Operation of water temperature safety devices...............................................................................45 6.9 Nominal capacity.................................................................................................................................46 6.10 Ignition devices....................................................................................................................................46 6.11 Opening and safety times...................................................................................................................47

EN 15033:2006 (E) 3 6.12 Fan supervision...................................................................................................................................49 7 Rational use of energy........................................................................................................................49 7.1 Efficiency..............................................................................................................................................49 7.2 Stand-by consumption........................................................................................................................50 8 Fitness for purpose - Heating-up time..............................................................................................51 8.1 Requirements.......................................................................................................................................51 8.2 Tests.....................................................................................................................................................51 9 Marking and instructions....................................................................................................................51 9.1 Appliance marking..............................................................................................................................51 9.2 Instructions..........................................................................................................................................53 9.3 Language..............................................................................................................................................55 Annex A (informative)

National situations in the member states...............................................................56 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of EU Directive 90/396/EEC.......................................................................................58 Bibliography......................................................................................................................................................60

Figures Figure 1 — Apparatus for wall terminal wind test.........................................................................................40 Figure 2 — Apparatus for roof terminal wind test.........................................................................................41 Figure 3 — Symbols for use in vehicles and/or boats..................................................................................52

Tables Table 1 — Test gases.......................................................................................................................................26 Table 2 — Optional test pressures for caravan holiday homes and boats................................................27 Table 3 — Appliance performance at voltage limits.....................................................................................37 Table 4 — Wind speeds and directions for testing balanced wall flue outlets and air intakes................42 Table 5 — Wind speeds and directions for testing combined roof flue outlets and air Intakes..............43 Table 6 — Wind speeds and directions for testing roof flue outlets with under floor air Intakes...........43 Table 7 — Wind speeds and directions for testing wall flue outlets with under floor air intakes...........44 Table A.1 — Normal working pressure for appliances in caravan holiday homes....................................56 Table A.2 — Normal working pressure for appliances in boats..................................................................57 Table ZA.1 – Correspondence between this European Standard and Directive 90/396/EEC...................59

EN 15033:2006 (E) 4 Foreword This document (EN 15033:2006) has been prepared by Technical Committee CEN/TC 181 “Dedicated liquefied petroleum gas appliances”, the secretariat of which is held by AFNOR. 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 May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. 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, which is an integral part of this standard. It was prepared to deal with particular aspects relating to :  safety;  rational use of energy. In particular, matters which relate to quality assurance systems, production tests and certification of conformity of auxiliary devices are not dealt with by this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EN 15033:2006 (E) 5 1 Scope This European Standard defines the specifications and test methods for the construction, safety, rational use of energy and fitness for purpose, environment, classification and marking of room sealed storage water heaters for the production of sanitary hot water using LPG for:  vehicles as defined in article 1 of Directive 70/156/EEC (see 3.12);  caravan holiday homes;  agricultural, forestry and mobile machinery, and  boats; hereafter called "appliance". This standard applies to appliances:  type C1, C3 and C5 (room sealed, see CEN/TR 1749) with combustion air intake and outlet for the products of combustion (combined or not) in the wall or roof;  fitted with atmospheric burners;  appliances fitted with or without a fan on the combustion circuit;  using LPG at the pressure I3BP(30) indicated in EN 437, (for caravan holiday homes and boats see Annex A);  of nominal heat input not exceeding 7 kW (Hi);  appliances whether connected to the water mains pressure or on board water supply;  appliances using, where appropriate, 12 V or 24 V DC electrical supply (or appliances with an additional 230 V heating element). This standard does not contain all the necessary requirements for:  appliances which fulfil a dual purpose role of space heating and heating water for sanitary hot water use.

This standard covers type testing only.

NOTE 1 Alternatively appliances (storage water heaters) for caravan holiday homes may comply with EN 89. NOTE 2 For space heating aspects see EN 624 "Specification for dedicated LPG appliances - Room sealed LPG space heating equipment for installation in vehicles and boats".

EN 15033:2006 (E) 6 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 125, Flame supervision devices for gas burning appliances — Thermo-electric flame supervision devices EN 126, Multifunctional controls for gas burning appliances EN 161, Automatic shut-off valves for gas burners and gas appliances EN 298:2003, Automatic gas burner control systems for gas burners and gas burning appliances with or without fans EN 437, Test gases — Test pressures — Appliance categories EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and heating applications EN 1487, Building valves — Hydraulic safety groups — Tests and requirements EN 1949, Specification for the installation of LPG systems for habitation purposes in leisure accommodation vehicles and in other road vehicles EN 50165, Electrical equipment of non-electric appliances for household and similar purposes — Safety requirements EN 60068-2-6, Environmental testing -— Part 2: Tests - Tests Fc: Vibration (sinusoidal) (IEC 60068-2-6:1995 + Corrigendum 1995) EN 60335-1, Household and similar electrical appliances — Safety — Part 1: General requirements (IEC 60335-1:2001, modified) EN 60335-2-21, Household and similar electrical appliances — Safety — Part 2- 21: Particular requirements for storage water heaters (IEC 60335-2-21:2002, modified) EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) EN 60730-2-9, Automatic electrical controls for household and similar use — Part 2-9: Particular requirements for temperature sensing controls (IEC 60730-2-9:2000, modified) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country codes (ISO 3166-1:1997) EN ISO 10239, Small craft — Liquefied petroleum gas (LPG) systems (ISO 10239:2000) ISO 7-1, Pipe threads where pressure-tight joints are made on the threads —- Part 1: Dimensions, tolerances and designation ISO 262, ISO general-purpose metric screw threads -— Selected sizes for screws, bolts and nuts

EN 15033:2006 (E) 7 ISO 301, Zinc alloy ingots intended for castings 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Water heater 3.1.1 storage water heater appliance which heats and stores a quantity of water contained in a vessel at a preset temperature and which has the heat source located inside or outside the vessel 3.1.2 fixed temperature storage water heater appliance fitted with a non-adjustable thermostat which controls the water temperature to a given setting 3.1.3 adjustable temperature storage water heater appliance fitted with a thermostat controlling the water temperature with the set point value of this device being adjustable 3.1.4 open storage water heater appliance with a vent to the atmosphere 3.1.5 closed storage water heater appliance which has no vent to the atmosphere 3.1.6 condensing storage water heater appliance in which, under normal operating conditions and for certain operation temperatures, the water vapour of the combustion products is partially condensed in order to use the latent heat of this water vapour to produce heat 3.2 Characteristics of the gas and electrical supplies 3.2.1 reference conditions dry gas at a temperature of 15 °C and an absolute pressure of 1013,25 mbar 3.2.2 test gases gases intended for the verification of the operational characteristics of appliances using combustible gases. They consist of reference gases and limit gases

3.2.2.1 reference gases test gases with which appliances operate in normal conditions, when they are supplied at the corresponding nominal pressure 3.2.2.2 limit gases test gases representative of the extreme variations of the characteristics of the gases for the use of which the appliance has been designed

EN 15033:2006 (E) 8 3.2.3 calorific value quantity of heat produced by the complete combustion under reference conditions of unit volume or mass of gas at a constant pressure of 1013,25 mbar, the constituents of the combustible mixture being taken under reference conditions and the products of combustion being brought back to these same conditions NOTE A distinction is made between two types of calorific value: gross calorific value water produced by combustion is assumed to be condensed Symbol: Hs (kWh/kg),

net calorific value water produced by combustion is assumed to be in the vapour state Symbol: Hi. (kWh/kg) 3.2.4 limit pressures pressures representative of the extreme variations in the appliance supply conditions Symbols: maximum pressure: pmax (mbar) minimum pressure: pmin (mbar) 3.2.5 rated voltage voltage or range of voltages specified by the manufacturer at which the appliance will operate normally 3.3

gas circuit part of the appliance conveying or containing LPG 3.4 Control and safety devices 3.4.1 control knob component intended to be operated manually in order to control an appliance, for example: tap or temperature selector 3.4.2 manual shut-off valve valve that permits manual interruption of the gas rate to the burner and ignition burner (if any) 3.4.3 automatic shut-off valve valve designed to open when energized by an electrical current and which closes automatically in the absence of the electrical current 3.4.4 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 flame

EN 15033:2006 (E) 9 3.4.5 multifunctional control device having at least two functions, one of which is a shut-off function, integrated in one housing, whereby the functional parts cannot operate if separated 3.4.6 programming unit device that reacts to impulses from control and safety systems, gives control commands, controls the start-up program, supervises the burner operation and causes controlled shutdown or safety shutdown if necessary NOTE The programming unit follows a predetermined sequence of actions, in conjunction with the flame detector. 3.4.7 automatic burner control system system that comprises at least a programming unit and all the elements that make up a flame supervision device 3.4.8 water overheat safety device device which initiates a non-volatile lockout before the appliance can be damaged or the safety of the user being endangered 3.4.9 vent orifice which permits atmospheric pressure to be maintained in a compartment of variable volume or content 3.4.10 device for monitoring air supply or evacuation of combustion products device designed to automatically shut-down the appliance in the event of abnormal air intake or combustion products evacuation conditions 3.5 Stages of operational and safety sequence 3.5.1 program sequence of the operations determined by the automatic burner control unit to assure the start-up, supervision and shutdown of the burner 3.5.2 spark restoration automatic process by which, following disappearance of the flame signal, the ignition device is switched on again without the gas supply having been interrupted 3.5.3 recycling automatic process by which, after loss of flame during operation, the gas supply is interrupted and the full start procedure is re-initiated automatically (normally after a minimum required waiting time, without a fan, or after prep urge time, with a fan) 3.5.4 controlled shutdown process by which a control device (internal or external to the appliance) immediately cuts off the gas supply to the burner; the appliance returns to its off position 3.5.5 safety shutdown process which is initiated immediately in response to the signal from a temperature limiting device or sensor and which causes the burner to shut down; the appliance returns to its start position

EN 15033:2006 (E) 10 3.5.6 lock out complete interruption of the gas supply 3.5.7 non-volatile lockout situation such that a restart can only be accomplished by a manual reset 3.5.8 volatile lockout situation such that a restart can be accomplished either by manual intervention or by restoration of the electrical supply after its loss 3.5.9 ignition lockout (thermoelectric device only) device that prevents the ignition system from functioning when the main gas circuit is open 3.5.10 restart lockout (thermoelectric device only) device that prevents restoration of the gas flow to the main burner or to the main burner and the ignition burner until the end of the extinction safety time

3.5.11 prepurging operation consisting of introducing forced air into the combustion circuit in order to evacuate any remaining air/gas mixtures; this takes place between the start-up command and the activation of the ignition device 3.6 Burners and ignition devices 3.6.1 burner component that provides the air-gas mixture and ensures the combustion of the gas 3.6.2 main burner burner that is intended to assure the thermal function of the appliance by burning the main gas quantity 3.6.3 ignition device any means (flame, electrical ignition device or other device) used to ignite the gas admitted to the ignition burner or the main burner 3.6.3.1 manual ignition device device by means of which the burner is ignited following manual intervention 3.6.3.2 automatic ignition device automatic device which ignites the ignition burner or the main burner directly 3.6.4 ignition burner small burner intended to ignite a main burner 3.6.4.1 permanent ignition burner

ignition burner that is ignited before the main burner and extinguished when the appliance is shut down voluntarily or by the flame supervision device

EN 15033:2006 (E) 11 3.6.4.2 alternating ignition burner ignition burner that is extinguished as soon as ignition of the main burner has taken place and re-ignites at the main burner flame just before the latter extinguishes 3.6.4.3 interrupted ignition burner ignition burner that operates only during the ignition sequence 3.7 Combustion 3.7.1 combustion circuit circuit comprising the air supply circuit, combustion chamber, heat exchanger and combustion products circuit up to and including the ducts but not the flue outlet 3.7.2 combustion chamber enclosure inside which combustion of the air-gas mixture takes place 3.7.3 ducts of the combustion circuit combustion air intake and combustion products evacuation ducts (flue) used for transporting combustion air to and combustion products from the appliance to the terminal NOTE ducts completely surrounded: the combustion products evacuation duct is surrounded by combustion air along its whole length. 3.7.4 separated ducts

the combustion products evacuation duct and the combustion air intake duct are neither concentric nor completely surrounded

3.7.5 terminal device to which the combustion air intake ducts and / or the combustion products evacuation ducts (flue) are connected and which is intended to maintain the quality of combustion in the event of wind 3.7.5.1 flue terminal part of the combustion circuit that is intended to be connected to the flue, evacuating the combustion products to the outside 3.7.6 wind protection device cover over the combustion circuit openings on the outside of the vehicle (e.g. deflector plates, covering hoods), which protect the circuit from unacceptable effects in the event of wind and maintains the quality of combustion

3.7.7 condensate liquid formed by the condensation of the combustion products water vapour

EN 15033:2006 (E) 12 3.8 Water circuit 3.8.1 hydraulic safety group group comprising all or a part of the following items (in accordance with EN 1487) in a single unit in the normal direction of the water flow such as a non return valve, an isolating valve (optional), a safety valve, a drain device and an air break to drain 3.8.2 combined temperature and pressure relief valve device which automatically prevents the water in the appliance from exceeding a certain temperature and prevents the pressure from exceeding the maximum working pressure 3.8.3 water temperature thermostat device allowing the water temperature to be maintained automatically at a pre-determined value 3.8.4 adjustable water temperature thermostat water temperature thermostat that permits the user to adjust the set point temperatures between the maximum and minimum values 3.8.5 low inertia thermometer measuring instrument with a response time such that 90 % of the final temperature rise, in the range 15 °C to 100 °C, is obtained within 5 s when the sensor is plunged into still water 3.8.6 water supply pressure gauge pressure measured at the water inlet connection of the appliance Symbol: p Unit: bar NOTE 1 bar = 105 Pa. 3.9 Soundness 3.9.1 external soundness soundness, with respect to the atmosphere, of an enclosure containing gas 3.9.2 internal soundness soundness of a closure member in the closed position and isolating an enclosure containing gas from another enclosure or from the outlet of the valve 3.10 Operation 3.10.1 gas rates 3.10.1.1 mass rate mass of gas consumed by the appliance over time during continuous operation

EN 15033:2006 (E) 13 Symbol: M Unit: kilograms or grams per hour (kg/h) 3.10.1.2 volume rate volume of gas consumed by the appliance over time during continuous operation Symbol: V Unit: cubic metres per hour (m3/h) 3.10.2 heat inputs 3.10.2.1 heat input product of the volumetric rate or the mass rate and the net calorific value of the gas referred to the same given conditions Symbol: Q Unit: kilowatt (kW) 3.10.2.2 nominal heat input value of the heat input declared by the manufacturer Symbol: Qn

Unit: kilowatt (kW) 3.10.2.3 corrected heat input heat input that would be obtained if the appliance were supplied with dry reference gas at the normal supply pressure and a temperature of 15 °C, with an atmospheric pressure of 1 013,25 mbar (see 6.4.2) Symbol: Qc Unit: kilowatt (kW) 3.10.2.4 minimum heat input minimum value of heat input declared by the manufacturer Symbol: Qm Unit: kilowatt (kW) 3.10.2.5 heat output quantity of energy transmitted to the water divided by time Symbol: P Unit: kilowatt (kW)

EN 15033:2006 (E) 14 3.10.3 efficiency ratio of the heat output to the heat input, expressed in percent (%) Symbol: ηu 3.10.4 gas combustion 3.10.4.1 flame stability characteristic of flames that remain at the burner ports or in the flame retention zone provided by the design of the appliance 3.10.4.2 flame lift total or partial lifting of the base of the flames from the burner ports or the flame retention zone provided by the design of the appliance 3.10.4.3 light back entry of a flame into the body of a burner 3.10.4.4 yellow tipping yellowing of the top of the blue cone of an aerated flame 3.10.4.5 sooting appearance of deposits of soot on the parts of the appliance in contact with the combustion products or with the flame 3.10.5 response times 3.10.5.1 ignition opening time time that elapses between ignition of the supervised flame and the moment when the valve is held open by the flame signal Symbol: TIA Unit: second (s) 3.10.5.2 extinction safety time time which elapses between extinction of the supervised flame and closure of the gas supply c

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