BS EN 419-1:2009 pdf free download – Non-domestic gas-fired overhead luminous radiant heaters Part 1: Safety.
5.3 Ignition devices
5.3.1 General
5.3.1.1 Appliances with manually ignited ignition burners
There shall be ready access for lighting the ignition burner.
5.3.1.2 Appliances with automatic ignition
When the appliance is installed in accordance with the manufacturer’s instructions it shall be possible to light the appliance from an easily accessible position by means of an electrical or other convenient ignition device incorporated in the appliance.
Ignition burners and ignition devices shall be protected by design and position against diminution or extinction resulting from e.g. draughts, products of combustion, overheating, condensation, corrosion or matter falling from above.
Ignition burners, ignition devices and their mountings shall be so designed that they can only be located rigidly and correctly in relation to every component and burner with which they are designed to operate.
5.3.2 Ignition device for the main burner
The main burner shall be filled with an ignition burner or other automatic ignition device for direct ignition.
Where the heat input is 6 kW or less the main burner may be ignited directly by manual means, provided that the main flame is supervised.
5.3.3 Ignition burners
If different ignition burners are used when the appliance is converted from one gas to another, they shall be marked, easy to substitute for one another and easy to fit. The same applies to injectors where only they have to be changed. Injectors shall carry an indelible means of identification and shall only be removable with the aid of a tool.
Ignition burners shall be protected against blockage by gas-borne particulate matter.
5.4 Main burner
The cross-sectional area of the flame ports shall not be adjustable.
The burner shall be so located and arranged that misalignment cannot occur. It shall not be possible
to remove the main burner assembly without the use of tools.
5.5 Pressure test points
The appliance shall be filled with at least two pressure test points. One shall be filled upstream of the first control and safety device and the other downstream of the last gas flow rate control and in a position carefully selected so as to permit measurements to be made.
For appliances burning only third family gases not fitted with a regulator a single test pressure point may be filled.
5.6 Injectors
Injectors and removable restrictors shall carry an indelible means of identification. It shall be possible to change injectors and restrictors without having to move the appliance from its installed position. However, injectors shall only be removable with the aid of a tool.
6 Operational requirements
6.1 Soundness of the gas circuit
The gas circuit shall be sound. It is deemed to be sound if, under the conditions described in 7.2.1.1, the leakage of air does not exceed 100 cm3/h irrespective of the number of components, whether mounted in series or parallel, on the appliance.
6.2 Heat inputs
6.2.1 Nominal heat input
When measured under the test conditions described in 7.2.2.2, the heat input obtained at the normal pressure shall be within ± 5 % of the nominal heat input.
6.2.2 Ignition burner heat input
When measured under the test conditions described in 7.2.2.3 the heat input obtained at normal pressure shall be within ± 5 % of the ignition burner heat input declared by the manufacturer.
However this tolerance is extended to ± 10 % where the injector has a diameter of 0,5 mm or less.