BS/EN 50291-2-2019 pdf download.Electrical apparatus for the detection of carbon monoxide in domestic premises
Part 2: Electrical apparatus for continuous operation in a fixed installation in recreational vehicles and similar premises including recreational craft — Additional test methods and performance requirements.
5 Design requirements
5.1 General requirements
This sub-clause of EN 50291-1 is applicable, with the following addition:
In this European Standard there are requirements that cover aN apparatus. Additional application specific requirements apply to certain groups of recreational vehicles, such as boats. An apparatus which complies with the requirements for recreational craft will automatically comply with the requirements for motor caravans and caravans. An apparatus which complies with the requirements for motor caravans will automatically comply with the requirements for caravans. The apparatus are designed for continuous operation.
NOTE I When the vehicle is not in use the apparatus may be switched oft Mi order to save the vehicles power supply or the internal batteries.
The apparatus may consist of one or more sensor(s) and a control unit. Sensors (integrated into the apparatus or remote) shall be designed to detect carbon monoxide.
NOTE 2 Sensors or apparatus designed accorcng EN 50291-I may be used as apparatus or as component of it. if the additional requirements of this European Standard are comØed with,
The apparatus shall reliably detect the presence of carbon monoxide in recreational vehicles under the stated application conditions, shall produce an alarm and Type A apparatus shall be able to initiate executive actions whenever the level exceeds the alarm set point.
The apparatus, electrical assemblies and components shall comply with EN 50291-1, where applicable, with the construction requirements of 5.2 and the test and performance requirements of Clause 6.
5.2 Construction
This sub-clause of EN 50291-1 is applicable, with the following addition:
Each sensor shall be constructed of materials that will not corrode in the environment where it is designed for, e.g. in the presence of a salt-laden atmosphere as exists in a marine environment, or be affected by the gases and vapours that may be expected to be present in a recreational craft.
Adequate means shall be provided to mount the remote sensor(s), pointing vertically downwards, securely to the vehicles substructure.
The control unit shall be constructed of materials that are suitable for use in the intended application e.g. in the cabin or below deck area of a recreational craft
5.4 Alarms
This sub-clause of EN 50291-1 is applicable, with the following addition:
5.4.4 Addition:
If more than one sensor Is connected to a control unit, the control unit shall indicate the alarm condition of the different sensors indlviduay.
5.6 Fault Warnings
This sub-clause of EN 50291-1 is replaced by:
The apparatus shall provide a visual and audible fault signal in the event of interruption of communication between control unit and the remote sensor(s).
The audible fault signal shall be clearly identified and different from a gas alarm.
5.9 Transmittable output signal (applicable for type A apparatus only) This sub-clause of EN 50291-1 is applicable, with the following addition:
The output signal of the apparatus shall operate under the same conditions as the visual and audible alarm. For triggering an output signal, there shall be no built-in delay.
5.11 Labelling
5.11.1 This sub-clause of EN 50291-1 is applicable, with the following additions:
The manufacturer shall declare for which of the following application(s) the device is approved:
— domestic premises;
— caravans;
— motor caravans:
— boats.
This shall be noted on a label on the device or fixed to the device with a more detailed explanation in the manual (see Figure 1).
If one instruction manual is used for different types of devices it shall be explicitly noted which type is related to which of the above mentioned applications.BS/EN 50291-2-2019 pdf download.