Specification for dedicated liquefied petroleum gas appliances - Domestic flueless space heaters (including diffusive catalytic combustion heaters)
This European Standard specifies the requirements, the test methods and the marking of domestic flueless space heaters, including diffusive catalytic combustion heaters, having a nominal heat input (Hs), not exceeding 4,2 kW burning 3rd family gases at nominal operating pressures not exceeding 50 mbar, referred to in the text as 'appliances'. This European Standard is applicable to the following types of appliances: a) fixed heaters burning commercial butane and/or commercial propane; b) portable or mobile heaters burning either commercial butane, or, commercial butane and commercial propane including those that incorporate a LPG container installation compartment for a transportable refillable liquefied petroleum LPG container. There are no specific thermal efficiency requirements appropriate to these types of appliance as: c) all the heat produced by the combustion process is released into the space to be heated; d) the requirements with regard to the combustion performance, which is a safety matter, ensure the effective burning of the fuel gas. It does not cover appliances incorporating electrically operated gas control systems. Annex A gives the details of the categories of appliances marketed in various countries. Requirements for appliances given in this standard assume that the supply of gas from the container will be governed by a pressure regulator having a maximum nominal outlet pressure of 50 mbar. This European Standard does not cover LPG containers for liquefied petroleum gas neither their associated regulator nor tubing and flexible hoses which shall comply with national requirements in force. This European Standard only covers type testing.
Festlegungen für Flüssiggasgeräte - Abzuglose Haushaltsraumheizgeräte (einschließlich Heizgeräte mit diffusiver katalytischer Verbrennung)
Diese Europäische Norm enthält die Anforderungen, die Prüfmethoden und die Kennzeichnung für häusliche, abzugslose Raumheizer, einschließlich Raumheizer mit diffusiver katalytischer Verbrennung, deren Nennwärmebelastung (HS) 4,2 kW nicht überschreitet, die mit Gasen der dritten Gasfamilie betrieben werden und deren Nenndruck 50 mbar nicht überschreitet. Diese Raumheizer werden im Text als „Geräte“ bezeichnet.
Diese Norm gilt für folgende Arten von Geräten:
a) fest angeschlossene Geräte, die mit handelsüblichem Butan und/oder handelsüblichem Propan betrieben werden;
b) tragbare oder transportable Geräte, die mit handelsüblichem Butan und/oder handelsüblichem Propan betrieben werden, einschließlich der Geräte, die ein Flaschenfach für eine transportable und wiederauffüllbare Flüssiggasflasche haben;
Anforderungen an die rationelle Verwendung von Energie sind in dieser Europäischen Norm nicht enthalten, weil
c) alle durch die Verbrennung erzeugte Wärme in den zu beheizenden Raum gelangt;
d) die Anforderungen an die Verbrennungsgüte eine Sicherheitsanforderung ist und eine vollständige Verbrennung sichergestellt wird.
Diese Norm gilt nicht für Geräte, die mit elektrisch betriebenen Regel- und Sicherheitseinrichtungen ausgerüstet sind.
Anhang A zeigt Einzelheiten über die Gerätekategorien, die in den verschiedenen Ländern angewendet werden.
Die Anforderungen dieser Norm für Geräte setzen voraus, dass die Versorgung mit Flaschengas über ein Gasdruckregelgerät erfolgt, dessen höchster Nenn-Ausgangsdruck 50 mbar beträgt.
Diese Norm enthält keine Anforderungen an Flüssiggasflaschen und an die dazu gehörenden Flaschendruckregelgeräte und an bewegliche Schläuche, die den jeweiligen nationalen Anforderungen entsprechen müssen.
Spécifications pour les appareils fonctionnant exclusivement aux gaz de pétrole liquéfiés - Appareils de chauffage domestiques non raccordés (y compris les appareils de chauffage a combustion catalytique diffusive)
La présente Norme européenne spécifie les prescriptions, les méthodes d'essais et le marquage des appareils domestiques de chauffage non raccordés à un conduit d'évacuation des produits de la combustion, y compris les appareils à combustion catalytique diffusive, dont le débit calorifique nominal est inférieur à 4,2 kW (HS), alimentés par des gaz de la 3e famille sous la pression nominale de service ne dépassant pas 50 mbar, désignés dans le texte par «appareils».
La présente Norme européenne est applicable aux types d'appareils suivants :
a) appareils fixes fonctionnant au butane commercial et/ou au propane commercial ;
b) appareils portatifs ou mobiles fonctionnant soit au butane commercial, soit au butane commercial et au propane commercial, y compris ceux qui ont un compartiment d’installation pour une bouteille portative rechargeable de gaz de pétrole liquéfié.
Aucune prescription particulière concernant le rendement thermique n'est définie pour ces types d'appareils car :
c) toute la chaleur produite par le processus de la combustion se dégage dans l'espace à chauffer ;
d) les exigences concernant la combustion, qui relèvent de la sécurité, garantissent la combustion du combustible gazeux .
La présente Norme européenne ne concerne pas les appareils incorporant des dispositifs électriques de contrôle du gaz.
L'annexe A donne les détails concernant les catégories d'appareils commercialisées dans les divers pays.
Les exigences pour les appareils données dans cette norme européenne supposent que l'alimentation en gaz à partir de la bouteille soit contrôlée par un détendeur dont la pression nominale maximale de détente atteint 50 mbar.
La présente norme européenne ne concerne pas les bouteilles de gaz de pétrole liquéfié, ni leurs détendeurs associés, ni les tubes et tuyaux flexibles, qui doivent être conformes aux réglementations nationales en vigueur.
La présente norme couvre uniquement les essais de type.
Specifikacija za plinske aparate na utekočinjeni naftni plin - Plinski gospodinjski grelniki za gretje prostorov brez priključka na dimnik (vključno z grelniki z difuzijskim katalitskim zgorevanjem)
Standards Content (sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Festlegungen für Flüssiggasgeräte - Abzuglose Haushaltsraumheizgeräte (einschließlich Heizgeräte mit diffusiver katalytischer Verbrennung)Spécifications pour les appareils fonctionnant exclusivement aux gaz de pétrole liquéfiés - Appareils de chauffage domestiques non raccordés (y compris les appareils de chauffage a combustion catalytique diffusive)Specification for dedicated liquefied petroleum gas appliances - Domestic flueless space heaters (including diffusive catalytic combustion heaters)97.100.20Plinski grelnikiGas heatersICS:Ta slovenski standard je istoveten z:EN 449:2002+A1:2007SIST EN 449:2004+A1:2008en01-januar-2008SIST EN 449:2004+A1:2008SLOVENSKISTANDARD
SIST EN 449:2004+A1:2008
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
November 2007 ICS 97.100.20 Supersedes EN 449:2002 English Version
Specification for dedicated liquefied petroleum gas appliances - Domestic flueless space heaters (including diffusive catalytic combustion heaters)
Spécifications pour les appareils fonctionnant exclusivement aux gaz de pétrole liquéfiés - Appareils de chauffage domestiques non raccordés (y compris les appareils de chauffage à combustion catalytique diffusive) Festlegungen für Flüssiggasgeräte - Abzuglose Haushaltsraumheizgeräte (einschließlich Heizgeräte mit diffusiver katalytischer Verbrennung) This European Standard was approved by CEN on 9 September 2002 and includes Amendment 1 approved by CEN on 27 September 2007.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 449:2002+A1:2007: ESIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 2 Contents page Foreword......................................................................................................................................................................3 1 Scope..............................................................................................................................................................4 2 Normative references....................................................................................................................................4 3 Terms and definitions...................................................................................................................................5 4 Classification................................................................................................................................................10 5 Safety and constructional requirements...................................................................................................11 6 Test methods................................................................................................................................................21 7 Marking and instructions............................................................................................................................37 Annex A (normative)
Special national conditions................................................................................................43 Annex B (normative)
Vitiation room.......................................................................................................................49 Annex C (informative)
Air supply and ventilation – Using recommendations...................................................51 Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or other provisions of EU Directives..............................................................................................................52SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 3 Foreword This document (EN 449:2002+A1:2007) 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 2008, and conflicting national standards shall be withdrawn at the latest by May 2008. This document supersedes !EN 449:2002". This document includes Amendment 1, approved by CEN on 2007-09-27. The start and finish of text introduced or altered by amendment is indicated in the text by tags !". 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 document. !deleted text" Items relating to quality assurance systems, production testing and particularly certificates of conformity of auxiliary equipment are not covered 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, Bulgaria, 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 the United Kingdom. SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 4 1 Scope This European Standard specifies the requirements, the test methods and the marking of domestic flueless space heaters, including diffusive catalytic combustion heaters, having a nominal heat input (Hs), not exceeding 4,2 kW burning 3rd family gases at nominal operating pressures not exceeding 50 mbar, referred to in the text as 'appliances'. This European Standard is applicable to the following types of appliances: a) fixed heaters burning commercial butane and/or commercial propane; b) portable or mobile heaters burning either commercial butane, or, commercial butane and commercial propane including those that incorporate a LPG container installation compartment for a transportable refillable liquefied petroleum LPG container. There are no specific thermal efficiency requirements appropriate to these types of appliance as: c) all the heat produced by the combustion process is released into the space to be heated; d) the requirements with regard to the combustion performance, which is a safety matter, ensure the effective burning of the fuel gas. It does not cover appliances incorporating electrically operated gas control systems. Annex A gives the details of the categories of appliances marketed in various countries. Requirements for appliances given in this standard assume that the supply of gas from the container will be governed by a pressure regulator having a maximum nominal outlet pressure of 50 mbar. This European Standard does not cover LPG containers for liquefied petroleum gas neither their associated regulator nor tubing and flexible hoses which shall comply with national requirements in force. This European Standard only covers type testing. 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 257, Mechanical thermostats for gas burning appliances EN 437:1993, Test gases - Test pressures - Appliance categories EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 5 EN 1057, Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating applications EN 60335-1:1994, Safety of household and similar electrical appliances - Part 1: General requirements (IEC 60335-1:1991, modified) EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions - Part 1: Country codes (ISO 3166-1:1997) ISO 7-1, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation CR 1472:1997, General guidance for the marking of gas appliances CR 1749, European scheme for the classification of gas appliances according to the method of evacuation of the products of combustion (Types) 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 appliance incorporating a LPG container appliance which includes a LPG container installation compartment 3.2 auxiliary equipment tap and cocks; flame supervision devices; thermostats; multifunctional controls; automatic shut-off valves. 3.3 burner component that allows the gas to burn. Two types are distinguished: non-aerated burner: in which the air for combustion is entrained entirely at the burner outlet or at the burner surface for catalytic burners; aerated burner in which part of the air for combustion, termed primary air, is entrained by the gas flow and mixed before the burner outlet. The remainder of the air drawn in at the port, termed secondary air, is drawn in after the burner outlet or at the burner surface for catalytic burners SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 6 3.4 heat input quantity of energy used divided by time corresponding to the volumetric or mass flow rates, the calorific value used being either the net or gross calorific value NOTE Q Unit : kilowatt (kW) [EN 437:1993] 3.5 nominal heat input value of the heat input declared by the manufacturer NOTE Qn [EN 437:1993] 3.6 volume rate volume of gas consumed by the appliance during continuous operation divided by the operating time. NOTE V Units: cubic metre per hour (m3/h), litre per min (l/min), cubic decimetre per hour (dm3/h) or cubic decimetre per second (dm3/s) [EN 437:1993] 3.7 mass rate mass of gas consumed by the appliance during continuous operation divided by the operating time NOTE M Units : kilogram per hour (kg/h), or gram per hour (g/h) [EN 437:1993] 3.8 flame lift phenomenon characterized by the partial or total movement of the base of the flame away from the burner port 3.9 relative density ratio of the masses of equal volumes of dry gas and dry air at the same conditions of temperature and pressure : 15°°C (or 0°°C), 1 013, 25 mbar NOTE d [EN 437:1993] 3.10 ignition device device to ignite one or more burners directly or indirectly, for instance through a flash tube it may be either electric (resistance, spark, etc.) or thermal (pilot, etc.) SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 7 3.11 flame supervision device device including a sensing element which causes the gas supply to a burner to be opened or closed according to the presence or absence of the flame which activates the sensing element 3.12 Wobbe number ratio of the calorific value of a gas per unit volume and the square root of its relative density under the same reference conditions. The Wobbe index is said to be gross or net according to whether the calorific value used is the gross or net calorific value. NOTE gross Wobbe index : Ws ; net Wobbe index : Wi. Units: either megajoule per cubic metre (MJ/m3) of dry gas at the reference conditions, or megajoule per kilogram (MJ/kg) of dry gas [EN 437:1993] 3.13 injector component part that admits the gas into an aerated burner. There are two types of injectors: calibrated injector: where the section of the outlet orifice is fixed ; adjustable injector: where the section of the outlet orifice is variable 3.14 sound mechanical joint connection device assuring soundness in an assembly made up of several parts, generally of metal it can be: a conical joint; an O-ring joint; a flat-faced joint. 3.15 tap handle manually operated component used to open, partially open, or close a tap 3.16 primary air adjuster device allowing the primary aeration of a burner to be set at a predetermined value according to the supply conditions. The operation of changing the setting of this device is termed the 'adjustment of primary air' 3.17 gas rate adjuster device allowing the gas rate to a burner to be set at a predetermined value according to the supply conditions. It often consists of a screw, termed a 'throttle screw' or an 'adjustment screw'. The operation of changing the setting of this device is termed the 'adjustment of the gas rate' SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 8 3.18 gross calorific value Hs quantity of heat produced by the complete combustion, at constant pressure, of unit volume or mass of the considered gas, the water produced by the combustion being condensed. It is expressed in megajoules referred either to per cubic meter of dry gas measured at 15°°C at a pressure of 1 013,25 mbar or to per kg of dry gas 3.19 gas supply pressure difference between the static pressure measured at the inlet connection of the appliance and the atmospheric pressure 3.20 light back phenomenon characterized by the return of the flame inside the body of the burner 3.21 tap device to adjust the heat input during use and/or isolate the gas supply to the various burners 3.22 soft solder solder for which the lowest temperature of the melting range, after application, is less than 450 °C 3.23 stability of flames conditions of the flames at the burner ports when the phenomena of flame lift or light back do not occur 3.24 thermostat device to maintain automatically a selected constant temperature. It may include a graduated scale for the selection of the temperature 3.25 closed fronted fire appliance in which the glowing area is substantially covered by means of a transparent or translucent screen 3.26 cold condition condition of the appliance required for some tests and obtained by allowing the unlit appliance to attain equilibrium at room temperature 3.27 hot condition condition of the appliance required for some tests and obtained by heating for one hour at the normal test pressure 3.28 fixed heater heater designed to be secured to a wall or floor 3.29 mobile heater self-contained heater incorporating its own gas container within the body of the appliance and designed to be moved without lifting 3.30 portable appliance self-contained heater for connection to a gas supply by means of flexible tubing and designed to be easily carried SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 9 3.31 atmosphere sensing device a device that is designed to shut off the gas supply when the carbon dioxide concentration of the surrounding atmosphere exceeds a given level. Such a device normally comprises a vitiation sensitive pilot in conjunction with a suitable flame supervision device 3.32 catalytic unit panel and its content, including the catalytic pad, into which the gas is injected, through which it is distributed and oxidised, and from which the products are emitted 3.33 diffusive catalytic combustion space heater space heating appliance in which gas diffuses through a catalytic pad and is flamelessly oxidized by oxygen that has diffused into the pad from the surrounding atmosphere at a temperature below that at which flame combustion would occur NOTE Diffusive catalytic combustion space heaters do not include catalytic combustion heaters in which pre-mixing of gas and air is effected before the catalytic pad is reached, nor do they include appliances employing after-burners in which products of incomplete combustion from burners are further oxidized over a catalyst. 3.34 by-pass rate non-adjustable rate of flow through a thermostat when the valve is closed 3.35 slip ratio of unburnt fuel gas to total hydrocarbons which have passed through the catalytic pad 3.36 minimum operational rate either a) for any burner or section of a burner that is controlled by a thermostat, the bypass rate; or b) for any burner that is manually controlled but where it is only possible to obtain certain predetermined fixed settings, the lowest rate obtainable in normal use 3.37 removable that which may only be removed with a tool 3.38 direct destination country country for which the appliance has been certified and which is specified by the manufacturer as the intended country of destination [CR 1472:1997] 3.39 manufacturer person responsible for designing and manufacturing a product covered by the directive, with a view to placing it on the Community market on his own behalf [CR 1472:1997] SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 10 4 Classification 4.1 Classification of gases Gases likely to be used are classified in families according to the value of their Wobbe number. Table 1 details the family and groups relevant for this standard. Table 1 — Classification of gases Gas families and groups 3rd Family Gases Wobbe Number MJ/m3 (Hs at 15 oC) Group B/P between 72,9 and 87,3 Group P between 72,9 and 76,8 Group B between 81,8 and 87,3 4.2 Classification of appliances according to the supply gases and pressures Appliances are classified into categories according to the gases and pressures that they are designed to use. However, for each country, only some of the categories defined hereafter are applicable, on account of local gas distribution conditions (types of gas and supply pressures). For these categories, requirements different from those defined in this standard shall not be specified. Annex A describes the gas distribution conditions and types of connection applicable to each country. This specification only covers appliances of the following categories: a) appliances in Category I3+which may be used at a nominal operating pressure of 37 mbar when used on propane and a nominal operating pressure of 28 mbar or 30 mbar when used on butane; b) appliances in Category I3B/P(30) which may be used with propane, butane or mixes of these gases at a nominal operating pressure of 28 mbar or 30 mbar; c) appliances in Category I3B/P(50) which may be used with propane, butane or mixes of these gases at a nominal operating pressure of 50 mbar; d) appliances in Category I3B which may be used with butane only at a nominal operating pressures of 28 mbar or 30 mbar; e) appliances in Category I3P(37) which may be used with propane only at a nominal operating pressure of 37 mbar; f) appliances in Category I3P(50) which may be used with propane only at a nominal operating pressure of 50 mbar. 4.3 Classification of appliances according to the method of evacuation of products of combustion According to the classification given in CR 1749, the appliances falling into the scope of this standard are of type A1AS, that is to say "appliances not intended for connection to a flue or to a device for evacuating the products of combustion to the outside of the room in which the appliance is installed, not fitted with a fan, but fitted with an atmosphere sensing device" (see 5.13.2). SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 11 5 Safety and constructional requirements 5.1 Test methods The test methods and means of assessment shall be as described in clause 6. 5.2 Conversion to different gases The appliance shall be supplied for a single gas category and for a single operating pressure or pressure couple. Conversion to another category or pressure or pressure couple is not permitted. 5.3 Materials The quality and thickness of material used in the construction of an appliance shall be such that the safety characteristics are not altered in use. In particular, all parts of the appliance shall withstand the mechanical, chemical and thermal conditions to which they may be submitted during their use. In normal conditions of use, of cleaning or of adjustment, the materials shall not be liable to any deformation which might impair their performance. Metal parts shall be suitably protected against the effects of corrosion. When a European Standard is adopted for a means of sealing used on the appliance, that means of sealing shall comply with the requirements of that European Standard. Rubber seals shall be made from materials which comply with EN 549. The appliance gas pipework and gas controls shall be of metal except as allowed in 5.6. Materials containing asbestos shall not be used. Glass components shall not have sharp edges or corners likely to cause injury during use or maintenance. Mountings for glass components shall be such as to avoid stresses on the glass during normal use. 5.4 Cleaning and user maintenance Any part of the appliance requiring cleaning by the user shall be easily accessible without having to move the appliance, and without the use of a tool. It shall be possible to replace such parts correctly and without difficulty. Appliances shall have no ragged or sharp edges other than those necessary for the function of the appliance or accessory that could create an hazard for the user in normal use or during user maintenance. The assembly of the LPG container by the user shall be possible with simple, commonly available, tools. If a special tool is required it shall be provided with the appliance by the manufacturer. 5.5 Strength of assembly The construction of the appliance shall be such that, during normal conditions of use, maintenance and, for mobile and portable appliances, movement, any displacement, distortion or deterioration of parts likely to impair its good performance will not occur. For mobile and portable heaters connected using a downward facing union connector (5.7.1 b2), at the end of the test carried out according to 6.5 a), the soundness of the gas circuit shall be checked according to 5.6. SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 12 5.6 Soundness of the gas circuit assembly All gas carrying parts, starting with the inlet connection, shall be delivered by the manufacturer assembled for operation. Holes for screws, pins, etc. intended for the assembly of components shall not open into the gas ways. The soundness of assemblies connected to the gas circuit shall be assured, by means of mechanical seal joints. For parts that do not require to be dismantled during normal maintenance, for example taps and injectors, the use of appropriate thread sealing compounds is permitted, those compounds shall comply with EN 751-1 and
EN 751-2. Soft solder shall not be used to ensure the soundness of the connections of the gas circuit. Removable components or the threaded parts of the pipe work which may be dismantled during normal maintenance shall remain sound after five disconnection’s, if necessary after changing a gasket, where such exists. Under the test condition specified in 6.6.2, the leak detected during each of the tests numbers 1 and 2 shall not exceed 0,07 dm3/h (dry air, 20 °C, 1 013,25 mbar). 5.7 Connections 5.7.1 Gas inlet The gas inlet to the appliance shall be one of the following types: a) for fixed appliances: 1) without a thread: for a length of at least 30 mm its extremity shall be cylindrical, smooth
and clean to allow connection by means of a gas-tight compression fitting; 2) with a thread: its extremity shall have a thread following ISO 228-1 or ISO 7-1, size 1/2, 3/8, 1/4 (major diameter 21 mm, 17 mm or 13 mm); 3) for connection to copper tube complying with EN 1057 (compression or capilliary fittings); b) for mobile and portable appliances: 1) with a nozzle for the attachment of a flexible tube; 2) a downward facing union connector for a hose assembly. The Special National Conditions with regard to connections are given in annex A. 5.7.2 Pressure test point For fixed appliances, means shall be provided to allow the pressure to be measured easily. The pressure test point in the gas circuit, if exists, shall have a nozzle with an external diameter of (0509,−) mm and shall be at least 10 mm long. The internal diameter shall not exceed 1 mm. 5.7.3 Connection with flexible houses having a threaded extremity The housing assembly shall be designed such as to resist to the tests described in 6.5 a). SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 13 5.8 Appliance stability, fixing and mobility devices 5.8.1 Appliances with integral containers The appliance shall be so designed that, with its container in place, it cannot be tipped over when subjected to the force and the test conditions specified in 6.8.1. 5.8.2 Appliances without integral containers When tested in accordance with 6.8.2 the appliance shall not fall forwards or sideways when placed on an inclined plane at an angle of 15°. It shall not fall backwards when placed on an inclined plane at an angle of 10°. 5.8.3 Fixed appliances When the appliance is installed as described in the manufacturer's instructions, it shall be secure. In the test conditions described in 6.8.3, the appliance shall remain securely fixed to the wall and the mounting shall not be distorted. 5.8.4 Mobility devices After the test described in 6.8.4, there shall be no damage to the wheels or castors, and they shall rotate freely. 5.9 Taps and controls 5.9.1 General The appliance shall be fitted with such taps and controls as are essential for the normal operation of the appliance by the user. When a European Standard is adopted for any item of auxiliary equipment as defined in 3.2, that equipment shall comply with the requirements of that European Standard. When a flame supervision device, multi-functional control, automatic shut-off valve, or thermostat falls within the scope of EN 125, EN 126, EN 161 or EN 257, the requirements of that standard shall be met. Mobile and portable appliances shall not incorporate a position on the tap capable of completely closing the gas supply. Catalytic appliances which employ a flame for ignition shall be so constructed that after the pre-heat period it is not possible to select a pre-heat position without continuous manual operation. Taps shall be placed in such a way that their strength, operation, manipulation and accessibility undergo no damage from actions to which they are subjected in normal use, and they shall be protected against ingress of foreign matter. Moreover, their manipulation shall remain easy during and after the test described in 6.23.2. All parts of a control shall be clean. Taps shall be mounted in such a way that no accidental movement relative to the gas supply connection is possible. Any control placed in the gas circuit shall be arranged so that any maintenance by a service engineer is easy and so that its exchange by a service engineer is possible. SIST EN 449:2004+A1:2008
EN 449:2002+A1:2007 (E) 14 5.9.2 Plug type taps A plug type tap shall have a compensating device to take up automatically any wear between the plug and the tap body. 5.9.3 Needle type taps A needle type tap shall not be capable of reducing the heat input to a burner below a pre-set minimum. It shall not be possible to unscrew the needle from its housing when opening the valve. When closing, the pressure of the needle on its seat constitutes the stop. The operating screw shall be a simple thread such that the maximum rate is obtained after turning not less than a half turn and not more than one turn from the valve's closed position. 5.10 Control handles, knobs or pushbuttons The closed position (fixed appliances), open and any reduced rate positions (for fixed and mobile appliances) shall be marked in a visible legible and durable fashion (e.g. a large flame to denote full on, a small flame to indicate a low rate and a full disc or circle, of at least 3 mm diameter, to denote any off position of fixed appliances). A tap capable of complete closing shall not be used on mobile appliances. If control handles operate by turning, the closing direction shall be clockwise. For fixed appliances, if the control handles operate by turning, and their axes are in a horizontal plane, the closure mark placed in a vertical plane shall be situated above the turning axis of the handle in its closed position. The closed position of the tap shall not give rise to any possibility of confusion with an open position. Any special position of the tap intended for ignition and/or any special button that has to be operated to cause ignition shall be clearly marked (e.g. by a star). Where more than one tap is provided it shall be obvious which...