BS EN 419-1-2009 pdf download.Non-domestic gas-fired overhead luminous radiant heaters Part l : Safety.
The quality and thickness of materials used in the construction of an appliance shall be:
a) such that the construction and performance characteristics are not altered so as to affect the safe operation of the appliance in normal conditions of use and of maintenance by the user;
b) such as to ensure a reasonable operating life.
In particular, when the appliance is installed according to the manufacturer’s instructions, all the components shall withstand the mechanical, chemical and thermal conditions to which they may be subjected when used In a manner which can be reasonably foreseen
Copper shall not be used for gas-carrying parts where the temperature is likely to exceed 100 °C.
Asbestos or materials containing asbestos shall not be used.
Solder that has a melting point below 450 °C after application shall not be used for gas-carrying parts.
5.1.3 Accessibility for maintenance and use
Components and controls shall be arranged such that they are readily accessible for adjustment, maintenance or exchange. Where necessary, access doors or removable panels shall be provided.
Parts that are intended to be removed for maintenance or cleaning shall be readily accessible, shall be simple to assemble correctly and difficult to assemble incorrectly. Such parts shall be difficult to assemble incorrectly where incorrect assembly would create a hazardous condition or result in damage to the appliance and its controls.
Parts of the appliance which are not intended to be removed by the user and for which removal would affect safety shall be capable of removal only with the aid of tools.
5.1.4 Means of sealing the gas circuit
Holes for screws, studs, etc, intended for the assembly of components shall not open into the gasways. The wall thickness between holes (including threads) and gasways shall be not less than 1 mm.
The soundness of components and assemblies connected to the gas circuit and likely to be dismantled for routine maintenance at the consumer’s premises shall be ensured by means of mechanical joints (e.g. metal to metal joints, 0-ring joints or packing) but excluding the use of any sealing compound (e.g. tape, mastic or paste). The soundness shall be maintained after dismantling and re-assembly.
Sealing compounds may be used for permanent threaded assemblies. The sealing material shall remain effective under normal conditions of appliance use.
The cross-sectional area of the combustion circuit shall not be adjustable. Any outlet for products of
combustion shall be so designed and arranged that it is protected against inadvertent blockage.
5.1.6 Inlet connection
The inlet connection shall be one of the following types:
a) a thread conforming to EN ISO 228-1:2003 In this case the end of the gas inlet connection shall have a flat annular surface at least 3 mm wide for thread sizes Y2 and % and at least 2,5 mm wide for thread size ¼, to allow the interposition of a sealing washer. Moreover, when the end of the gas inlet connection has a thread of nominal size ¼, it shall be possible to insert a gauge of 12,3 mm diameter to a depth of at least 4 mm;
b) a thread conforming to EN 10226-1:2004 or EN 10226-2:2005;
c) a compression fitting suitable for copper tube conforming to EN 1057:2006;
d) a straight tube at least 30 mm long, the end of which is cylindrical, smooth and clean, to allow connection by means of a compression fitting as specified in c);
e) a flange to ISO 7005-1:1992, ISO 7005-2:1988 or ISO 7005-3:1988.
NOTE The conditions of inlet connections prevailing In the vañous countries are given in A.5.
The gas inlet connection shall be so secured that connections to the gas supply can be made without disturbing any controls or gas-carrying components of the appliance.
Appliances shall be provided with adequate means of support or suspension other than the gas supply pipe.
5.1.7 Confirmation of operation
Means shall be provided to allow observation of any ignition burner flame during commissioning and servicing.
It shall at all times be possible for the user to ascertain visually whether the appliance is in operation or whether the main burner has been extinguished.
5.1.8 Electrical equipment
The electrical equipment of the appliance shall be so designed and constructed as to obviate hazards of electrical origin and shall comply with the requirements of EN 60335-2-102:2006 which cover such hazards.BS EN 419-1-2009 pdf download.