FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
FIRE ALARM SYSTEM
CONSULTANT
SPECIFICATIONS
Page 1 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
Contents
1
2
Scope ................................................................................................................................... 3
Codes and Standards ............................................................................................................ 4
2.1
Qualifications of Manufacturers ............................................................................................. 4
3 Fire Alarm Control Panel (FACP) ............................................................................................ 5
3.1
Functional Description ............................................................................................................ 5
3.2
Additional Components .......................................................................................................... 5
3.3
Configuration .......................................................................................................................... 6
3.4
Panel Construction .................................................................................................................. 7
3.5
Panel Indications ..................................................................................................................... 7
3.6
Display ..................................................................................................................................... 8
3.7
Panel Controls ......................................................................................................................... 8
3.8
Remote Monitoring Signals..................................................................................................... 8
3.9
Software .................................................................................................................................. 9
3.10 Sounders ................................................................................................................................. 9
3.11 Fault Reporting...................................................................................................................... 10
3.12 System Management ............................................................................................................ 10
4 Automatic Fire Detectors (General) ..................................................................................... 12
4.1
General .................................................................................................................................. 12
4.2
Addressable Units ................................................................................................................. 12
4.3
Conventional Units................................................................................................................ 12
4.4
Ionisation Smoke Detectors .................................................................................................. 13
4.5
Photoelectric Smoke Detectors ............................................................................................ 14
4.6
Multi-Sensors – Analogue Addressable ................................................................................ 14
4.7
Duct smoke detectors ........................................................................................................... 15
4.8
Heat detectors ...................................................................................................................... 16
4.9
Detector Base ........................................................................................................................ 16
5 Other devices ..................................................................................................................... 17
5.1
Addressable Manual Call points............................................................................................ 17
5.2
Addressable Sounder Module............................................................................................... 17
5.3
Conventional detector interface module ............................................................................. 17
5.4
Addressable relay interface module ..................................................................................... 18
5.5
Addressable switch monitoring module ............................................................................... 18
5.6
Short Circuit Isolator Module ................................................................................................ 18
5.7
Loop powered sounders ....................................................................................................... 18
5.8
Photoelectric beam smoke detectors ................................................................................... 18
5.9
Ultra-violet flame detectors.................................................................................................. 19
5.10 Remote Indicator Unit .......................................................................................................... 19
5.11 Sounders ............................................................................................................................... 19
5.12 Alarm Bells ............................................................................................................................ 19
Page 2 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
1
Scope
Furnish a complete 24V DC analogue addressable, electrically supervised, zone annunciated, fire
detection and alarm system as specified herein and indicated on the drawings. The system shall
include but not be limited to, a control panel or panels with integral power supply to provide the
24V DC, signal initiating devices, audible and visual alarm devices, and all accessories required to
provide a complete and operating system.
The fire alarm system shall be wired as 2 core signal loops. 24V DC power wiring shall be installed to
alarm sounders via addressable sounder modules or via conventional monitored sounder outputs
within the control panel.
Loop powered sounders shall be connected directly to the signal loops..
Page 3 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
2
Codes and Standards
The following codes and standards shall apply to work of this section.
o
EN54-2 and EN54-4 - Fire Alarm CIE and PSE
o
ISO9001 - Quality control
o
BS 5839:part 1 - Fire Detection and Alarm Systems for Buildings
2.1
Qualifications of Manufacturers
Manufacturers of the products supplied for the fire alarm system shall have been in the business of
manufacturing Fire Alarm products for at least five years. They shall confirm compliance to the
above codes and standards.
Page 4 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
3
Fire Alarm Control Panel (FACP)
3.1
Functional Description
The fire alarm control panel (FACP) shall be the central processing unit of the system, receiving and
analysing signals from fire sensors, providing audible and visual information to the user, initiating
automatic alarm response sequences and providing the means by which the user interacts with the
system.
The FACP shall be certified as meeting the requirements of EN54-2 and EN54-4 by a suitable, notified
body. A certificate and test report shall be made available for inspection as evidence of certification.
The FACP shall be easily configurable to meet the exact detection zone and output mapping
requirements of the building.
The FACP shall be microprocessor based and operate under a multitasking software program.
Operating programs and configuration data shall be contained in re-configurable non-volatile
memory. Retention of the memory shall not rely on any form of battery or capacitor back-up device.
The FACP shall incorporate separate processors for loop processing and central processing.
Provision shall be made for each addressable loop to be sub-divided into geographical zones. The
section of wiring corresponding to each zone circuit shall be protected from faults in other sections
by line isolator modules.
In order to facilitate re-configuration and system extension, the allocation of addresses to devices
shall be independent of their physical arrangement on the loops.
Up to 240 individually addressed standard devices shall be configured on each addressable loop.
Loop powered sounders and beacons incorporated as sensor bases shall be available.
The FACP shall have the capability to support sub-addressing of addressable modules.
It shall be possible to fit a 40-column printer to the FACP which will print system events
automatically and logged data upon request.
The FACP shall incorporate a real time clock to enable events to be referenced against time and
date.
3.2
Additional Components
It shall be possible to fit the FACP with a network board to allow up to sixty-four control panels to
communicate with each other. The network shall be fully fault tolerant and shall continue to
function normally under any single fault condition.
It shall be possible to fit the FACP with a modem board to allow remote interrogation and
monitoring of a network of control panels.
Page 5 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
It shall be possible to fit up to thirty-two, sixteen way input/output modules, eight way relay
modules, six way sounder modules or four way conventional zone modules or any combination
thereof to each control panel. Modules shall connect to a separate serial bus but shall be
programmable in the same manner as devices connected to the addressable loops.
3.3
Configuration
It shall be possible to perform configuration updates on site using a portable personal computer and
a Windows ® based configuration utility. This facility shall allow the following parameters to be set: System
o Produce a configuration file which contains data for up to 64 control panels connected
together as a network.
o Set cause and effect tables for any device to operate devices or functions on any panel or
panels connected to the network.
o Upload and view graphically the configuration from a single panel or entire network of
panels.
Control panel
o Panel name (network identity, fifteen characters minimum)
o Panel text (comfort message or service company forty characters minimum)
o Change code numbers for access levels two and three.
o Select sounder ringing mode as common, zonal or two stage
o Select first and second stage delay times for each sounder output to between zero and five
minutes.
o Set number of loops on panel as one, two or four
o Set number of zones on panel as 0,16, 48 or 96
o Set loop sounder volume globally
o Set start and end times for day night mode for each day of the week
Detectors
o Allocate a zone
o Set a delay before the panel responds to a fire signal
o Indicate pre-alarm
o Set day sensitivity and night sensitivity separately
o Address loop powered base sounders
o Allocate a forty character location text message
Call points
o Allocate a zone
o Allocate a forty character location text message
Switch units (input)
o Allocate a zone for each input and the device itself
o Define input action as fire, fault, pre-alarm, technical alarm, evacuate, alert, security alarm,
silence alarm, reset, transparent, disablement or test mode.
o Change the input action message from the default to any one of the above or to any one of a
user defined library of 10 additional action messages.
o Set a delay before the panel responds to a fire signal
Page 6 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
o
o
Select whether the input requires the control panel to be reset or is self-clearing upon
removal of the input
Allocate a forty character location text message
Relay or sounder units (output)
o Allocate a zone for each input and the device itself
o Define whether the device responds to evacuate inputs, as a sounder (default ringing), is
silenceable, needs to be reset or produces a single pulsed operation of between one and five
seconds (programmable)
o Has a delay before operating (zero to five minutes)
o Allocate a forty character location text message
Loop powered sounders and beacons
o Allocate a zone
o Define whether the device responds to evacuate inputs, as a sounder (default ringing), is
silenceable or needs to be reset.
o Has a delay before operating (zero to five minutes)
o Allocate a forty character location text message
3.4
Panel Construction
The housing containing the FACP shall be of metal construction and shall be capable of being surface
or semi-flush mounted. It shall be complete with cable knocks-outs in sufficient quantity to
accommodate all likely cabling requirements.
The housing shall afford a minimum ingress protection to IP30 and it shall not be possible to open
the FACP without the use of a special tool or key.
3.5
Panel Indications
The FACP shall monitor the status of all devices on the addressable loops for fire, short-circuit fault,
open-circuit fault, incorrect addressing, unauthorised device removal or exchange, pre-alarm
condition and contaminated detector condition.
The FACP shall also monitor the status of internal connections and interfaces including charger and
batteries.
The FACP shall provide the following discrete visual indications:
o
o
o
o
o
o
o
o
o
o
o
POWER ON
FIRE ALARM
PRE-ALARM
ON TEST
BUZZER SILENCED
DELAY ACTIVE
MORE EVENTS
GENERAL DISABLEMENT
GENERAL FAULT
POWER FAULT
SYSTEM FAULT
Page 7 of 19
green LED indicator
red LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
yellow LED indicator
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
o
3.6
SOUNDER FAULT/DISABLED
yellow LED indicator
Display
In addition to the indications above, the FACP shall have an integral 240 x 64-pixel graphic LCD
display.
The display shall incorporate a backlight which will illuminate upon any event (excluding mains
failure) or button press.
The display shall be capable of simultaneously indicating the number of outstanding events and their
types as well as the current event.
3.7
Panel Controls
The panel shall be provided with at least the following manual controls: o
o
o
o
o
o
o
o
o
o
3.8
SILENCE BUZZER
ACKNOWLEDGE ALARM
RE-SOUND ALARM
RESET
LAMP TEST
FUNCTION 1
MORE FIRES
MORE EVENTS
HELP
MENU NAVIGATION PAD (UP,DOWN,LEFT,RIGHT,ENTER,EXIT)
Remote Monitoring Signals
The FACP shall contain at least three programmable inputs to allow interconnection to other
systems.
The FACP shall contain at least two programmable outputs to allow interconnection to other
systems.
The FACP shall be capable of monitoring and controlling remote site devices, such as relays for the
control of plant and dampers directly from the addressable loops.
The FACP shall be capable of monitoring fire doors such that, in the event of a fire alarm condition,
an event is generated to warn of the failure of a fire door to close.
Page 8 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
3.9
Software
The FACP shall have, as a standard software enhancement, the ability to annunciate a pre-alarm
condition designed to give the earliest possible warning of potential fire condition without raising
the full alarm condition.
The FACP shall have as a standard software enhancement the ability to automatically adjust the
alarm threshold levels to compensate for changes in detector sensitivity due to contamination over a
period of time.
The FACP shall have, as a standard software enhancement, the ability to provide an indication that a
detector is nearing a level of contamination, which requires that it be replaced or serviced.
The FACP shall have, as a standard software enhancement, the ability to provide automatic warning
that a detector has reached a level of contamination, which requires that it be replaced or serviced.
The FACP shall have, as a standard software enhancement, the ability to synchronise loop data
transmission to eliminate the possibility of data corruption due to cross-talk or similar effects.
The FACP shall have, as a standard software enhancement, extensive, context sensitive help screens
to offer additional information on system status at all times.
3.10 Sounders
The FACP shall provide the necessary outputs to separately operate a minimum of two monitored
circuits of common system sounders. Each output shall be capable of driving a sounder load of up to
1A.
The FACP shall also be able to monitor the integrity of and control standard sounder circuits, via a
suitable addressable module.
The FACP shall be capable of providing a two-stage alarm sounder facility that can be programmed,
either on a zonal basis or common system basis, to meet the requirements of the fire authority.
Sounder outputs shall be available as follows:
o
o
Alert, intermittent pulsed tone
Evacuate, continuous tone
The FACP shall have the facility to change, on a per sounder zone basis, the sound output dependent
upon whether the source of alarm is:
o
o
an automatic detector, e.g. smoke, heat,
a manual call point.
The FACP shall have the facility to generate a slow pulsed output to all sounder circuits in response
to a security alert input.
Page 9 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
3.11 Fault Reporting
The FACP shall monitor all critical system components and interconnections, internal and external,
such that a failure, which would prevent the correct operation of the alarm functions, causes the
FAULT indicator to light and a message to be given on the alphanumeric display within 60 seconds of
occurrence.
The following faults shall be reported in the manner described above: o
o
o
o
o
o
o
o
o
o
o
o
o
o
Loop Short Circuit
Loop Open Circuit
Unconfigured Device
Device missing
Addressable Device Failure
Incorrectly Configured Device
System fault (processor)
Low battery
Charger failure
Earth fault monitoring
Battery Fault
Mains Failure
Sounder Wiring Open Circuit (per circuit)
Sounder Wiring Short Circuit (per circuit)
To help fault finding and repair, the FACP shall provide text messages to indicate the location of
where a fault has occurred in the system.
3.12 System Management
The FACP shall incorporate the following system management facilities:
o
o
o
o
o
o
o
o
o
o
o
o
Isolate/re-connect individual outputs or inputs of addressable points
Isolate/re-connect individual zones
Isolate/re-connect individual loops
Isolate/re-connect all or individual sounder circuits
Isolate/re-connect all volt-free contacts individually
Isolate/re-connect panel inputs
Walk-test of a selected zone to verify detectors and sounders
View system status
Print event log
Print point status.
Set time
View contamination status
Access to the facilities describe above shall be restricted to user Engineer level or above.
The FACP shall have an event log capable of storing the last 500 events that have occurred. It shall
be possible to view the content of the log via the alphanumeric display. Events shall be displayed in
chronological order with the newest events first. It shall be possible to scroll through the events.
Page 10 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
The FACP shall be designed so that, for each type of analogue addressable detector, the overall
response time including the sensor, the signal transmission system and the fire decision algorithm,
meets the requirement of European Standards.
The FACP shall be capable of isolating a group of selected detectors in areas of the building where
maintenance work is carried out.
Page 11 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
4
Automatic Fire Detectors (General)
4.1
General
The manufacturer shall have available the following types of analogue addressable automatic
sensors, for direct connection to the system addressable loops:
o
o
o
o
4.2
Ionisation smoke sensors
Photoelectric smoke sensors
Heat sensors
Multi-sensors
Addressable Units
The manufacturer shall be capable of offering two-state addressable versions of the following units,
taking only one address from the loop:
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
4.3
Ionisation smoke detectors
Photoelectric smoke detectors
Heat detectors
Photoelectric beam smoke detectors
Ultra-violet flame detectors
Conventional detector interface module
Addressable sounder modules
Addressable relay interface modules
Addressable switch monitoring modules
Short circuit isolator modules (no address required)
Loop powered sounders
Manual call points for indoor use
Manual call points for outdoor use
Multiple inputs/outputs
Radio interfaces to detectors and call points
Conventional Units
The manufacturer shall have available the following types of conventional automatic detectors,
manual call points and ancillary units for connection to the system via suitable interfaces:
o
o
o
o
o
o
o
o
o
Ionisation smoke detectors
Photoelectric smoke detectors
Photoelectric beam smoke detectors
Ultra-violet flame detectors
Heat detectors
Manual call points for indoor use
Manual call points for outdoor use
Remote indicator units
Sounders
Page 12 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
Analogue Addressable and addressable detectors and modules must be able to transmit to the FACP
an address to be used in the system configuration.
It must be possible to connect and mix automatic detectors, addressable manual call points and
addressable modules within the same zone sub-division of an addressable loop.
All equipment connected to the system addressable loop, either directly or via interfaces, shall be
proofed against electrical noise, high frequency pulses and electromagnetic influences from other
equipment.
The manufacturer shall have available suitable equipment to test and remove or exchange all three
main types of automatic point-type detectors when installed.
4.4
Ionisation Smoke Detectors
The ionisation smoke detectors shall be capable of detecting visible and invisible combustion gases
emanating from fires, using a dual ionisation chamber in which the air is ionised by a single
radioactive source.
The radioactive source used shall be AM 241 of one microcurie or less.
The ionisation smoke detectors shall be designed to have high resistance to contamination and
corrosion and shall include RFI screening to minimise the effect of radiated and conducted electrical
interference.
The ionisation smoke detectors shall be suitable for operation in air speeds of up to 10m/s and shall
incorporate screens to minimise the effects of small insects.
The manufacturer shall have available the following versions of the ionisation smoke detector to
meet different applications:
o
o
Analogue addressable
Conventional
The ionisation smoke detector shall incorporate LED’s, clearly visible from the outside, to provide
indication of alarm actuation.
In locations where the detector is not readily visible, remote indicator units shall be provided.
Page 13 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
4.5
Photoelectric Smoke Detectors
The photoelectric smoke detectors shall be capable of detecting visible combustion gases emanating
from fires and shall employ the forward light-scatter principle.
The point-type photoelectric smoke detectors shall be equally sensitive to a wide range of
combustible materials.
The design of the point-type photoelectric smoke detector sensing chamber shall be optimised to
minimise the effect of dust deposit over a period of time. The chamber cover shall be removable for
ease of cleaning or replacement.
The point-type photoelectric smoke detectors shall incorporate screens designed to prevent all but
the very smallest of insects from entering the sensing chamber, (50 holes per square centimetre or
more).
The photoelectric smoke detectors shall be designed to have high resistance to contamination and
corrosion and shall include RFI screening to minimise the effect of radiated and conducted electrical
interference.
The manufacturer shall have available the following versions of the point type photoelectric smoke
detector to meet different applications:
o
o
o
o
Analogue addressable
Conventional - normal sensitivity
Conventional – normal sensitivity – delayed response
Conventional – normal sensitivity – Intrinsically Safe
The photoelectric smoke detector shall incorporate two LED’s, clearly visible from the outside, to
provide indication of alarm actuation.
In locations where the detector is not readily visible, remote indicator units shall be provided.
4.6
Multi-Sensors – Analogue Addressable
The multi-sensor should be capable of monitoring two different sensing elements:
o
o
Photoelectric
Thermal
The design of the point-type multi-sensor photoelectric smoke detector sensing chamber shall be
optimised to minimise the effect of dust deposit over a period of time. The chamber cover shall be
removable for ease of cleaning or replacement.
The point-type multi-sensors shall incorporate screens designed to prevent all but the very smallest
of insects from entering the sensing chamber, (50 holes per square centimetre or more).
The multi-sensors shall be designed to have high resistance to contamination and corrosion and shall
include RFI screening to minimise the effect of radiated and conducted electrical interference.
Page 14 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
The sensor should be able to operate in the following modes:
Combination Mode
The sensor should be able to operate as a photoelectric sensor but when the ambient temperature
reaches 40o C or above, the thermal elements should be capable of sensing the ‘Rate of Rise’ and
adjust the sensitivity of the photoelectric element automatically. The sensitivity of the photoelectric
should be increased via an internal algorithm.
Photoelectric mode
The sensor should be able to return the analogue value for the photoelectric element during a
normal polling sequence.
The sensor should also be able to signal to the FACP if the thermal sensing element exceeds a fixed
temperature threshold.
Thermal mode
The sensor should be able to return the analogue value for the thermal element during a normal
polling sequence. The sensor should also be able to signal to the FACP if the photoelectric sensing
element exceeds a pre-defined threshold.
The multi-sensor shall incorporate LED’s, clearly visible from the outside, to provide indication of
alarm actuation. The LED’s should be controlled from the FACP if the LED’s flash during the normal
polling sequence.
The modes of the multi-sensor should be controlled by the FACP, when the FACP changes from one
mode to another the FACP should re-calibrate the multi-sensor.
In locations where the detector is not readily visible, remote indicator units shall be provided.
The multi-sensor should have the capability of monitoring both sensing elements, if either or both of
the elements fail it should be reported and displayed at the FACP.
4.7
Duct smoke detectors
The manufacturer shall produce standard equipment for the installation of smoke detectors in air
ducts. This equipment shall be designed to accommodate the manufacturer’s standard smoke
detectors and bases: Analogue addressable, Addressable and conventional.
Page 15 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
4.8
Heat detectors
The heat detectors shall be capable of detecting rapid rise in temperature and/or fixed absolute
temperatures.
The heat detectors shall employ two heat-sensing elements with different thermal characteristics to
provide a rate of rise dependent response.
The heat detectors shall include RFI screening to minimise the effect of radiated and conducted
electrical interference.
The manufacturer shall have available the following versions of heat detectors to meet different
applications:
o
o
o
o
o
o
o
o
Analogue addressable – grade 1, 2 or 3.
Two state addressable – grade 1
Two state addressable – grade 2
Conventional – grade 1
Conventional – grade 2
Conventional – range 1
Conventional – static 60°C
Conventional – static 90°C
The heat detectors shall incorporate LED’s, clearly visible from the outside, to provide an indication
of alarm actuation.
In locations where the detector is not readily visible, remote indicator units shall be provided.
4.9
Detector Base
The automatic point-type fire detectors shall be fixed to the installation by mean of plug-in bases.
Analogue addressable bases, sounder bases and conventional detector bases shall be available.
The three types of bases specified above shall incorporate the optional feature of being able to lock
the detectors in place once plugged in. Termination facilities shall be available for earthing.
Standard conventional and Analogue Addressable bases shall not contain any electronic circuitry.
This shall enable insulation and continuity checks to be completed on the wiring with the detector
heads removed.
Page 16 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
5
Other devices
5.1
Addressable Manual Call points
The addressable manual call points shall monitor and signal to the FACP the status of a switch
operated by a “break glass” assembly. They shall be red in colour and suitable for surface or flush
mounting. The addressable call points shall be provided with an integral red LED to indicate
activation.
One version of the addressable call point shall be available mounted in a weatherproof housing,
affording protection to IP 66.
The addressable call points shall be capable of operating by means of thumb pressure and not
require a hammer. They shall be capable of being tested using a special ‘key’ without the need for
shattering the glass.
The addressable call points shall incorporate a mechanism to interrupt the normal addressable loop
scan to provide an alarm response within 3 seconds and shall be field programmable to trigger either
an alert or an evacuate response from the FACP.
5.2
Addressable Sounder Module
The addressable sounder module shall be capable of monitoring and controlling two independent
circuits of alarm sounders using a single loop address.
24 V DC power to drive the sounders shall be derived independently from the FACP.
The addressable sounder module shall be capable of operating both sets of sounders in a pulsing or
continuous mode as determined on the module. Each circuit shall be individually programmable.
Sounder circuits shall be capable of synchronisation.
The addressable sounder module shall provide the facility to monitor the wiring to the sounders for
open or short-circuit and transmit the necessary fault signal to the FACP. Each sounder circuit shall
be separately fused.
The addressable sounder module shall provide the facility to monitor for failure of the power supply
for the sounders and transmit the necessary fault signal to FACP.
The addressable sounder module shall provide a green LED indication when the FACP is polling it.
5.3
Conventional detector interface module
The conventional detector interface module shall be capable of monitoring two independent zones,
each of up to 30 conventional detectors using a single loop address.
24 V DC power to power the conventional detectors shall be derived independently from the FACP.
Page 17 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
The conventional detector interface module shall provide the facility to monitor the detector zones
for open or short-circuit and transmit the necessary fault signal to the FACP.
The conventional detector interface module shall provide a remote LED facility to indicate detectors
in alarm and shall provide a red LED indication when the FACP is polling it.
5.4
Addressable relay interface module
The addressable relay interface module shall be capable of switching two independent relays; either
normally open or normally closed, each rated at 30V, 1Amp.
A single input shall provide open and short circuit monitoring facilities, set locally at the unit.
The addressable relay interface module shall use a single loop address.
The unit shall be powered directly from the addressable loop.
The addressable relay interface module shall provide an LED indication when the FACP is polling it.
5.5
Addressable switch monitoring module
The addressable switch monitoring module shall be capable of monitoring two independent voltage
free contacts, each either normally open or normally closed, using a single loop address.
The unit shall be powered directly from the addressable loop.
The addressable switch-monitoring module shall provide a red LED indication when the FACP is
polling it. The LED shall be continuously lit when either input is active.
5.6
Short Circuit Isolator Module
The short circuit isolator module shall provide protection on the addressable loop by automatically
disconnecting the section of wiring between two modules where a short circuit has occurred.
The short circuit isolator module shall derive power directly from the addressable loop and shall
provide an LED indication that the module has tripped. A base mounted version is available.
5.7
Loop powered sounders
Addressable electronic sounders shall be connected directly to the detection loops where required.
These shall be incorporated in a suitable mounting base so that an analogue smoke or heat sensor
may also be connected to the base, if required. Loop powered sounders shall be ceiling or wall
mountable. A cover plate shall be fitted when a sensor is not to be fitted on the sounder.
5.8
Photoelectric beam smoke detectors
The photoelectric beam smoke detectors shall be capable of detecting visible combustion gases
emanating from fires and shall utilise the light obscuration principle. The emitter shall project a near
infra-red beam to the receiver.
Two types are acceptable:
Page 18 of 19
Issue 06
FIRE ALARM SYSTEM
CONSULTANT SPECIFICATIONS
1. The photoelectric beam smoke detectors shall consist of an emitter and a receiver pair. The
detectors shall operate over a 5 – 100 metre range.
2. A Photoelectric reflective beam smoke detector consisting of a combined control unit and a
separate reflector. The detector shall operate over a 5-30 metre range.
The photoelectric beam smoke detectors shall have automatic recalibration in order to adjust for
contamination.
The photoelectric beam smoke detectors shall be designed to have high resistance to corrosion and
shall include RFI screening to minimise the effect of radiated and conducted electrical interference.
The photoelectric beam smoke detectors shall incorporate two LED’s, clearly visible from the outside
and below, to provide indication of alarm actuation and fault.
5.9
Ultra-violet flame detectors
The flame detector shall be of a point-type. It shall be mounted on its base using a simple twist
action for ease of installation and removal.
The flame detector shall be able to detect weak ultra-violet rays in a 120° cone of vision, in a direct
line of sight.
5.10 Remote Indicator Unit
The remote indicator unit shall provide a remote indication for any detector that may be located in
an enclosed or locked compartment.
The remote indicator unit shall be driven directly from its associated local detector. It shall be either
flush or surface mountable.
5.11 Sounders
Two types of Electronic sounders shall be acceptable: loop-powered addressable sounders (see
above) and stand-alone versions. Stand-alone versions shall powered by 24 Volts DC from the FACP.
Non loop-powered versions shall be flush or surface mountable, red in colour. They shall have a
minimum sound output of 95 dB (A) at 1 meter distance and shall have a maximum current
consumption at 24V DC of 100 mA.
5.12 Alarm Bells
Fire alarm bells shall be under dome type with a high resonance pressed alloy-steel gong to ensure a
load clear-tone ring. They shall be fully suppressed and polarised.
The operating mechanism shall be fully enclosed and the gong shall be red stove enamelled for long
life.
Alarm bells shall have a minimum sound output of 95 dB (A) at 1 metre distance, and shall have a
maximum current consumption at 24V DC of 30 mA.
Page 19 of 19
Issue 06