EN54 -22 / EN54-28
Line type heat detectors
There have been references made to the above DRAFT standards by individuals or Corporate bodies which clearly indicate a mis-understanding of current EN54 requirements in relation to line type heat detections systems.
There currently exists NO ACTIVE STANDARD FOR ANY LINEAR TEMPERATURE SENSING SYSTEM OF ANY MANUFACTURE OR OPERATING CONCEPT. Any reference to EN54-5 is totally irrelevent because this standard was written exclusively for POINT type heat detectors! As a combined cable & continuous detector, linear temperature sensing can be installed close to the point of risk....not the most convenient roof /ceiling height AND will monitor for alarm conditions at ANY & ALL points along its installed length. It is not more sensitive where temperature rise is directly beneath the detector and it does not rely on favourable air flows for increased sensitivity.
EN54-22….."restorable" line type heat detectors ............position @ 30 May 2014 as advised by British Standards Institution (BSI)
BS EN 54-22 is scheduled for publication on 01 December 2014
EN54-28…..Non-resettable line type heat detectors ......position @ 30 May 2014 as advised by British Standards Institution (BSI)
BS EN 54-28 is scheduled for publication on 19 October 2014