BS EN 54-20:2006 pdf free.Fire detection and firealarm systems — Aspirating smoke detectors.
BS EN 54-20 This European Standard specifies the requirements,test methods and performance criteria foraspirating smoke detectors for use in fire detection and fire alarm systems installed in buildings.
Aspirating smoke detectors developed for the protection of specific risks that incorporate specialcharacteristics (including additional features or enhanced functionality for which this standard doesnot define a test or assessment method) are not covered by this standard. The performancerequirements for any special characteristics are beyond the scope of this standard.
NOTE Certain types of detector contain radioactive materials. The national requirements for radiationprotection differ from country to country and they are not therefore specified in this standard.
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
EN 54-1:1996,Fire detection and fire alarm systems – Part 1: lntroduction
EN 54-2,Fire detection and fire alarm systems -Part 2: Control and indicating equipmentEN 54-4,Fire detection and fire alarm systems – Part 4: Power supply equipment
EN 54-7:2000，Fire detection and fire alarm systems – Part 7: Smoke detectors – Point detectorsusing scattered light, transmitted light or ionization.
EN 50130-4:1995,Alarm systems – Part 4: Electromagnetic compatibility – Product family standard:lmmunity requirements for components of fire, intruder and social alarm systems.
To comply with this standard the detector shall meet the requirements of this clause, which shall beverified by inspection and engineering assessment,and,when tested in accordance with the testsdescribed in Ciause 6, shall meet the requirements of the tests.
Each aspirating smoke detector shall be provided with integral red visual indicator(s),visible fromoutside the aspirating smoke detector, by which the individual smoke sensing element(s)(see 3.1),which released an alarm, can be identified, until the alarm condition is reset.Where other conditionsof the detector may be visually indicated,they shall be clearly distinguishable from the alarmindication.
The detector may provide for connections to ancillary devices (e.g. remote indicators, control relays),but open- or short-circuit failures of these connections shall not prevent the correct operation of thedetector.BS EN 54-20 pdf download.