Actuation of other fire alarm systems or safety facilities cont.

Interfacing fire alarms together, or actuating other systems, is discussed in the section.

The following recommendations are applicable in the case of fire alarm systems intended to actuate other fire alarm systems or safety facilities (e.g. by triggering an automatic fire suppression system, closing fire resisting doors, shutting down an air handling system or grounding lifts).
a) The fire alarm system should comply with the recommendations of any applicable part of BS 7273 for fire suppression.
b) If no part of BS 7273 is applicable, any special requirements for system design should be identified in
the purchase specification or design proposals.

c) If operation of the fire alarm system during routine testing would have an undesirable effect on other
fire systems or equipment, means should be provided for disabling the automatic actuation of the fire suppression system or equipment. The facility for disablement, and the indication of disablement, should comply with BS EN 54-2.
d) The other equipment or systems should not draw power from the fire alarm system in the non-fire state, other than for indicators and interface devices (e.g. relays). The power consumption of any such
indicators and interface devices should be taken into account in the calculation of battery capacity(see 25.4).