Fire alarm design recommendations

11.2 Recommendations
The following recommendations are applicable.
a) Fire alarm manual call points should conform to the requirements of BS EN 54-11 for Type A (“single action”) manual call points.
b) Fire alarm detection in the form of point heat detectors should conform to the requirements of BS EN 54-5 for Class A1 or A2 detectors, unless the foreseeable maximum ambient temperature in the protected area is 40 °C or above, in which case a Class B-G detector should be used as appropriate.                                          c) Fire alarm point smoke detectors should conform to BS EN 54-7.
d) Fire detection in the form of flame detectors should conform to BS EN 54-10.
e) Fire detection in the form of optical beam smoke detectors should conform to BS EN 54-12.

f) Aspirating smoke detectors should conform to BS EN 54-20;
g) Wireless fire alarm Components and systems using radio links should conform to BS EN 54-25;
h) Multi-sensor, optical and heat detectors should conform to either:
1) BS ISO 7240-15;
2) BS EN 54-5 and BS EN 54-7; or
3) CEA 4021.
i) Multi-sensor, carbon monoxide and heat detectors should conform to BS ISO 7240-8.
j) Carbon monoxide fire detectors should, in the absence of any relevant British, European or
International Standard, be capable of detecting a fire within 60 s if the carbon monoxide concentration exceeds 60 ppm, and should have a fire sensitivity (in combination with any other sensors within the fire
detector) sufficient to pass TF5 of BS EN 54-7 where the detector is declared to be suitable for installation instead of a smoke detector, or TF2 and TF3 of BS EN 54-7 where the detector is declared
only to be suitable for detecting smouldering fires. Any restrictions in the use of the detectors declared
by the manufacturers should be taken into account in the system design.
k) Control and indicating equipment should conform to BS EN 54-2.
l) Audible fire alarm devices should conform to BS EN 54-3.
m) Power supply equipment should conform to BS EN 54-4.
n) Cables should conform to the recommendations of Clause 26.
o) Those functions of the system that are recommended in this part of BS 5839, for which the storage of
programs and data is necessary to control the fire detection and alarm system, should comply with the
additional design requirements for software controlled control and indicating equipment in BS EN 54-2.
p) Where a PC is used as a user interface, e.g. in networked systems, it should be considered as a supplementary interface and there should be control and indicating equipment conforming
to BS EN 54-2 mounted adjacent, as it is unlikely that a PC would meet the requirements of BS EN 54-2.
q) Radio paging transmitters and receivers should conform to the relevant British or harmonized
European Standards applicable.