EN 50291-1:2018

European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Design requirements
6 Test and performance requirements
7 Apparatus using radio links
8 User instructions
9 Packaging
Annex A (informative) - Extended stability
        test - Sample protocol
Annex B (informative) - Calculation of the expected
        battery service life
Annex C (informative) - Visual and audible fault
        indication sequences
Annex D (informative) - A-deviations
Annex E (informative) - Test arrangement schematics
Annex F (informative) - Additional requirements for
        units displaying low (warning) CO concentrations
Bibliography

This European Standard specifies general requirements for the construction, testing and performance of electrically operated carbon monoxide gas detection apparatus, designed for continuous operation in domestic premises. The objective is to detect defective fossil fuel or solid fuel appliances so that they can be repaired or replaced. The function of the standard is not to monitor low levels of CO for health purposes. (Annex F gives recommendations for units displaying low (warning) CO concentrations). The apparatus may be mains-powered or battery-powered. Such apparatus is intended to warn of an acute level of CO, enabling the occupant to react before being exposed to significant risk.Additional requirements for apparatus to be used in recreational vehicles and similar premises are specified in EN 50291-2.NOTE 1For caravan holiday homes EN 50291-1 applies.This European Standard specifies two types of apparatus, these are:-type A - to provide a visual and audible alarm and an executive action in the form of a transmittable output signal that can be used to actuate directly or indirectly a ventilation or other ancillary device;-type B - to provide a visual and audible alarm only.NOTE 2Both type A and type B apparatus can be interconnected.This European Standard excludes apparatus for:-the detection of combustible gases, other than carbon monoxide itself (see EN 50194-1);-the detection of CO in industrial installations (see EN 45544-1, EN 45544-2 and EN 45544-3) or commercial premises;-CO measurement for smoke and fire detection;-CO measurement in carparks and tunnels.NOTE 3See EN 50545-1.