Part-03 Analogue Addressable Fire Alarm Systems

3 ANALOGUE ADDRESSABLE FIRE ALARM SYSTEM ....................................... 2
3.1 INTRODUCTION ................................................................................................ 2
3.1.1 Scope 2
3.1.2 References and Compliance 2
3.1.3 General 2
3.1.4 Quality Assurance 4
3.2 AUTOMATIC FIRE DETECTORS....................................................................... 4
3.2.1 General 4
3.2.2 Optical Smoke Detectors 6
3.2.3 High Performance Optical Smoke Detectors 7
3.2.4 Beam Smoke Detectors 7
3.2.5 Aspirating Smoke Detectors 8
3.2.6 Heat Detectors 8
3.2.7 Linear heat detectors 9
3.2.8 Infra-Red flame detectors 9
3.3 ENGINEERING ................................................................................................. 10
3.3.1 System Management Facilities 10
3.3.2 Technical specification 11
3.3.3 Cabling 12
3.3.4 Addressable Manual Call Points 12
3.3.5 Manual Pull Stations 13
3.4 MODULES ........................................................................................................ 13
3.4.1 Remote Indicator Module 13
3.4.2 Conventional Detector Interface Module 13
3.4.3 Addressable Relay Output Module 13
3.4.4 Addressable Contact Monitoring Module 14
3.4.5 Addressable Sounder Driver Module 14
3.4.6 Sounder Booster Module 14
3.4.7 Addressable Power Supply Module 14
3.4.8 Smoke Damper Module 15
3.4.9 Plant Interface Module 15
3.5 MONITORING .................................................................................................. 16
3.5.1 Fire monitoring 16
3.5.2 Fault and Warning Monitoring 17
3.5.3 Supervision and Fault Reporting 18
3.5.4 Alarm Output Functions 18
3.5.5 Voice Evacuation Systems 19
3.6 INSTALLATION ................................................................................................ 20
3.6.1 General 20
3.6.2 Installation of Detectors 20
3.6.3 Installation of Control Devices 20
3.6.4 Installation of Fire Controller Equipment 21

3 ANALOGUE ADDRESSABLE FIRE ALARM SYSTEM
3.1 INTRODUCTION

3.1.1 Scope
1 This part specifies the requirements for the material, installation, testing and commissioning of services for analogue addressable fire alarm systems for use within buildings.

2 Fire alarm panels, repeater panels, detection components, alarm components, cables, other materials and their installation shall be approved by Civil Defence Department.

3 The fire alarm system contractor shall be registered with, and on the approved contractors list of, the Civil Defence Department.

3.1.2 References and Compliance
1 The following standards are referred to in this Part:

BS 5839 ...................... Fire detection and alarm systems for buildings:
BS 5445 ..................... Components of automatic fire detection systems: detectors
BS 5501 ...................... Electrical apparatus for potentially explosive atmospheres
BS 7671 ...................... IEE Wiring regulations
2 Where applicable, the fire detection and alarm system and its installation shall comply with the relevant standards, regulations, rules and recommendations of the following:

British Standards BS

National Fire Prevention Association NFPA

Underwriters Laboratory, Inc. UL

Loss Prevention Council Board LPCB

3 Where applicable, the fire detection and alarm system and its installation shall comply with the relevant standards, regulations, rules and recommendations of the Civil Defence Department, Ministry of the Interior, State of Qatar.

3.1.3 General
1 The control and indicating equipment shall form the central processing unit of the system. It shall receive and analyse signals from fire sensors, providing audible and visual information to the user. It shall also initiate automatic alarm response sequences and providing the means by which the user interacts with the system. The housing enclosure shall be constructed to IP22 unless otherwise stated elsewhere in the Project Documentation.

2 The control and indicating equipment shall be modular in construction to allow for future extension of the system.

3 The control and indicating equipment shall be easily configurable so as to meet the exact detection zone and output mapping requirements of the building.

4 The control and indicating equipment shall be microprocessor based and operate under multitasking software program. Operating programs and configuration data must be contained in easily up-datable non-volatile memory (EPROM).

5 The control and indicating equipment shall incorporate a real-time clock to enable events to be referenced against item and date. This clock shall be accurate to within 1 minute per year under normal operating conditions.

6 It shall be possible for an engineer to perform configuration updates on site by plugging a portable personal computer in to the control and indicating equipment. Configuration data shall be retained in an electronic (disk) format.

7 The company responsible for the installation shall operate an approved document control system for the retention of configuration data.

8 The control and indicating equipment shall meet the requirements of BS 5839 Part 4 and shall be approved, together with associated ancillary equipment, by the Loss Prevention Council Board (LPCB).

9 The control and indicating equipment shall comprise separate processors, cross-monitoring each other.s correct operation, for the major functions of the system. In particular, different processors must be used for the main control function, the detection input and alarm output functions, and the display and control function.

10 No more than 200 addressable input or output points shall be controlled by a single processor.

11 To ensure continuous stability of the system, the setting of the address code in each addressable device shall be by either a DIL switch in the detector base or small card technology in addition to the adjustment provision in the central control panel.

12 In the case of plug-in analogue addressable detectors, the address code shall be set in the base to prevent unauthorised and potentially dangerous reconfiguration of the system.

13 The control and indicating equipment shall incorporate a key-switch with three positions “Normal”, “Trapped Normal” and “Enable” to prevent unauthorised use of the manual controls.

14 The control and indicating equipment shall be capable of operating with any of the following types of automatic detection equipment:

(a) conventional detectors

(b) two-state addressable detectors

15 The control and indicating equipment shall be capable of operating with intrinsically safe conventional detectors and intrinsically safe analogue addressable detectors suitable for installation in hazardous areas.

16 Addressable input and output devices shall be connected to addressable loops capable of accepting up to 99 devices for cable lengths not exceeding 1 km.

17 The control and indicating equipment shall have a minimum capacity for operating 1 fully loaded addressable loop. This shall be extendible up to a maximum capacity of 10 addressable loops.

18 Provision shall be made for each addressable loop to be sub-divided into different geographical zones. The section of wiring corresponding to each zone circuit shall be protected from faults in other sections by line isolator modules. It shall be possible to allocate all 99 addressable devices on the loop to a single zone.

19 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.

20 The control and indicating equipment shall have provision to drive and monitor up to 20 repeater panels providing a repeat of the indications on the control and indicating equipment display and up to a further three (3) repeater panels also incorporating the full set of system manual user controls.

21 The control and indicating equipment shall have provision to house the main power supply unit and the batteries required to power a systems of up to sixteen (16) zones.

22 The control and indicating equipment shall have provision for the connection of external power supplies, either local to the control and indicating equipment or distributed throughout the system, to supply power in excess of that stated as above.

23 The control and indicating equipment shall have provision for the connection of an 80 character line printer, either locally via a parallel port or remotely via a serial port. The fire alarm control panel shall be provided with a built-in printer, if specified in the Project Documentation.

24 The control and indicating equipment shall be capable of interfacing directly to an electronic radio paging system.

25 The control and indicating equipment shall be capable of being interfaced with the similar control and indicating equipment without locking up or being affected by feedback signals.

26 It shall be possible to connect a VDU monitor to the control and indicating equipment to display the information that would otherwise appear on the printer referred to in Clause 3.1.3-24.

27 The control and indicating equipment shall have the facility to enable an on board communications module to be added to allow local area networking to other controllers.

3.1.4 Quality Assurance
1 Items and equipment specified in this part shall be provided by experienced and approved manufacturers and contractors as designated in the Project Documentation or to the written approval of the Engineer.

3.2 AUTOMATIC FIRE DETECTORS

3.2.1 General
1 The system may include, but not be limited to, the following types of automatic detectors, manual call points and line modules for direct connection to the system addressable loops:

(a) ionisation smoke detectors

(b) optical smoke detectors

(d) infra-red flame detectors

(e) heat detectors

(f) manual call points for indoor use

(g) (manual call points for outdoor use

(h) ionisation smoke detectors for hazardous areas

(i) optical smoke detector for hazardous areas

(j) infra-red flame detectors for hazardous areas

(k) conventional detector interface module

(l) addressable relay interface module

(m) addressable contact monitoring module

(n) addressable sounder driver module

(o) addressable voice alarm module

(p) addressable power supply module

(q) line isolator module

(r) special detector interface module

2 The system may include, but not be limited to, both an analogue addressable and a two state addressable version of the following type of automatic fire detectors:

(a) ionisation smoke detectors

(b) optical smoke detectors

(d) infrared flame detectors

(e) manual call points for indoor use

(f) manual call point for outdoor use

(g) sounder booster module

(h) remote indicator module

3 The automatic fire detectors shall be fixed to the installation by means of plug-in detector bases.

4 The addressable base must incorporate all the circuitry required for communicating detector status to the control and indicating equipment, including the address setting switch.

5 Addressable detectors and modules must be able to transmit to the control and indicating equipment a pre-set and unique identifier to detect unauthorised changes in the system configuration.

6 It shall be possible to program and adjust the sensitivity of any of the detectors in the system from the central panel in addition to the local setting facilities. Removal of any detector shall not affect the performance of other detectors in the system

7 It shall be possible to program for automatic adjustment of sensitivity settings of the detectors on time-zone features, if required, for different hours of the day, for different days of the week, or for different months of the year.

8 The Contractor shall provide standard accessories for installing detectors in air ducts. This equipment shall be designed to accommodate the manufacturer.s standard smoke detectors and bases, both conventional and addressable. All such detectors to be installed in the air duct system shall be approved by the Air Conditioning Section of QGEWC, Qatar.

9 It must be possible to connect and mix automatic detectors, manual call points and addressable modules within the same zone sub-division of an addressable loop.

10 All types of automatic detectors, the plug-in bases and the line isolator shall be intrinsically safe

11 The addressable contact monitoring module for connection of „simple apparatus. such as conventional manual call points shall be intrinsically safe.

12 The intrinsically safe devices shall be designed to comply with the relevant provisions of BS 5501: Pt 7 and be certified by BASEEFA (British Approval Service for Electrical Equipment in Flammable Atmosphere) to EEx i IIC T5.

13 It shall be possible to connect several circuits of intrinsically safe addressable devices to a standard addressable loop via standard BASEEFA approved safety barriers from the loop as spurs.

14 All equipment connected to the system addressable loops, either directly or via interfaces, shall be proofed against electrical noise, high frequency pulses and electromagnetic influences from other equipment.

15 Both the conventional and addressable detector base shall be capable of driving a separate alarm LED indicator module.

3.2.2 Optical Smoke Detectors
1 The optical smoke detectors shall be capable of detecting visible combustion gases emanating from fires.

2 The optical smoke detectors shall comply with the relevant provisions of BS 5445: Pt.7 (EN 54: Pt.7).

3 The optical smoke detector shall have a sensitivity sufficient to be classified as „A. in BS 5445: Pt.9 (EN 54: Pt.9) test fires for TF2 and TF3.

4 The optical smoke detectors shall be approved and listed by the Loss Prevention Council Board (LPCB).

5 The optical smoke detectors shall employ the forward light scatter principle, using optical components operating at a wavelength of approximately 4.35 nm.

6 The design of the optical smoke detector sensing chamber shall be optimised to minimise the effect of dust deposits during a long period of operation.

7 The optical smoke detectors shall incorporate screens designed to prevent insects from entering the sensing chamber.

8 The optical smoke detectors shall incorporate a fin structure designed to totally eliminate the effect of very small insects such as thunder flies.

9 The optical smoke detectors shall be designed to have high resistance to contamination and corrosion.

10 The optical smoke detectors shall include RF1 screening and feed through connecting components to minimise the effect of radiated and conducted electrical interference.

11 The system may include, but not be limited to, the following versions of optical smoke detectors as required to meet different applications:

(a) analogue addressable

(b) analogue addressable intrinsically safe

(d) conventional high sensitivity

(e) conventional normal sensitivity

(f) conventional normal sensitivity delayed response

(g) conventional low sensitivity

(h) conventional normal sensitivity intrinsically safe

12 The optical smoke detector shall incorporate an LED, clearly visible from the outside, to provide indication of alarm actuation.

3.2.3 High Performance Optical Smoke Detectors
1 In addition to the above :

2 The high performance optical smoke detectors shall have a sensitivity sufficient to be classified as „B. or better in accordance with BS 5445: Part 9 (EN 54: Part 9) test fires TF2 to TF5 inclusive and as „C. in test fire TF1.

3 The high performance optical detectors shall monitor and use rapid changes in temperature to increase the normal sensitivity of the light scatter optical sensor to obtain an improved response to fast burning fires.

4 The high performance optical detectors shall not generate an alarm condition from a rate of rise of temperature or absolute temperature alone.

3.2.4 Beam Smoke Detectors
1 The beam smoke detectors shall be capable of detecting the presence of smoke in large open type interiors.

2 The beam smoke detectors shall project a modulated infrared light beam from a transmitter unit to a receiver unit. The received signal shall be analysed and, in the event of smoke being present for a predetermined period an alarm condition be activated.

3 The detectors shall be capable of providing cover in open areas up to 100 m in length and up to 14 m wide, giving an effective protection area of up to 1400 m2.

4 The fire alarm output of the detectors shall be activated in the event of smoke reducing the signal strength between 40% and 90% for a period of approximately 5 seconds.

5 In the event of a power failure at the transmitter unit or if the transmitted signal is reduced by more than 90% for a period in excess of 1 second, then a fault alarm condition shall be indicated. This condition shall inhibit the fire alarm until the signal is restored.

6 The receiver unit of the detectors shall be capable of performing an automatic reset, approximately 5 seconds after a fault is indicated, if the fault is no longer present.

7 The detectors shall include Automatic Gain Control (AGC) circuitry capable of providing compensation for long-term degradation of signal strength caused by component ageing or build-up of dirt on the optical surfaces of the transmitter and receiver unit lenses.

8 The beam smoke detectors shall comply with the relevant provisions of either BS 5445: Part 5 (EN 54: Part 5) for detectors suitable for use in normal environments or BS 5445: Part 8 (EN 54: Part 8) for detectors designed for use in high ambient temperatures.

9 The beam smoke detectors shall be approved and listed by the Loss Presentation Council Board (LPCB).

10 The receiver unit of the detectors shall incorporate an alarm/fault lamp, clearly visible from the outside, to provide indication of both alarm and fault conditions.

3.2.5 Aspirating Smoke Detectors
1 The aspirating smoke detectors shall be capable of detecting the presence of smoke particles in air samples drawn from several different locations.

2 The aspirating smoke detectors shall provide a continuous analogue profile of ambient air conditions.

3 The detectors shall be capable of responding to a developing fire situation with multiple staged alarms.

4 The fire alarm output of the detectors shall be programmable to allow sufficient time for action to be taken, from a detailed investigation of the cause of the alarm to a full scale evacuation.

5 The design of the detectors shall be such that they can be integrated with a fire alarm system and guard against specific pieces of equipment, such as computers, equipment racks, power boards and telecommunications switching racks, as well as entire rooms or floors.

6 The detectors shall include a facility to allow sensitivity threshold adjustments to suit the needs of particular environments.

7 Each detector system shall be capable of monitoring an area up to 2,000 m2, using easy to install PVC conduit.

9 The aspirating smoke detectors shall be approved and listed by the Loss Prevention Council Board.

10 The detectors shall incorporate an LED indicator, clearly visible from the outside, to provide indication of alarm or fault condition.

3.2.6 Heat Detectors
1 The heat detectors shall be capable of detecting both rapid rise in temperature and fixed absolute temperatures.

2 The beam smoke detectors shall comply with the relevant provisions of either BS 5445: Part 5 (EN 54: Part 5) for detectors suitable for use in normal environments or BS 5445: Part 8 (EN54: Part 8) for detectors designed for use in high ambient temperatures.

3 The heat detectors shall be approved and listed by the Loss Prevention Council Board (LPCB).

4 The heat detector shall employ two heat sensing elements with different thermal characteristics to provide a rate of rise dependent response.

5 The temperature sensing elements and circuitry of the heat detectors shall be coated with epoxy resin to provide environmental protection.

6 The heat detectors shall include RF1 screening and feed through connecting components to minimise the effect of radiated and conducted electrical interference.

7 The system may include, but not be limited to, the following versions of the heat detector as required to meet different applications:

(a) analogue addressable

(b) analogue addressable intrinsically safe

(d) conventional grade 1

(e) conventional grade 1 intrinsically safe

(f) conventional grade 3

(g) conventional grade 3 intrinsically safe

(h) conventional range 2 (98oC)

(i) conventional range 2 intrinsically safe

(j) conventional static 60oC (grade 2)

(k) conventional static 90oC

8 The heat detectors shall incorporate an LED, clearly visible from the outside, to provide indication of alarm actuation.

3.2.7 Linear heat detectors
1 The linear heat detectors shall be capable of detecting fire (or overheat) conditions in confined or polluted areas.

2 The sensor capable of the linear heat detectors shall be unaffected by dust, moisture or vibration and require little maintenance.

3 The detectors shall have a calibration switch mounted internally to set the alarm sensitivity threshold.

4 The detectors shall generate an alarm condition if the pre-determined alarm threshold is exceeded.

5 The detectors shall initiate a fault condition if the sensor cable has an open or short circuit condition present.

6 The detectors, upon detecting a cable open or short circuit or fault, shall be capable of signalling the condition to the main fire controller.

7 The linear heat detectors shall meet the requirements of either BS 5445: Part 5 (EN 54: Part 5) for detectors suitable for normal environment or BS 5445: Part 8 (EN 54: Part 8) for detectors designed for high ambient temperatures.

8 The linear heat detectors shall be approved and listed by the Loss Prevention Council Board (LPCB).

9 The detectors shall be suitable for use in hazardous areas and have mechanical protection for cables in areas where damage may occur.

10 The detectors shall incorporate red (fire) LED and yellow (fault) LED, clearly visible from the outside, to provide indication of alarm and fault condition.

3.2.8 Infra-Red flame detectors
1 The infra-red flame detectors shall be capable of detecting infra-red radiation produced by flaming fires involving carbonaceous materials.

2 The infra-red flame detectors shall be approved and listed by the Loss Prevention Council Board (LPCB) and manufactured under the appropriate category by the Underwriters Laboratories, Inc. (UL), and shall bear the “UL.” label.

3 The infra-red flame shall be able to detect a fuel fire of 0.1 m2 area from a distance of 30 m for the following fuels:

(a) petrol

(b) N-heptane

(d) diesel Oil

(e) alcohol

(f) ethylene glycol

4 The infra-red flame detectors shall employ narrow band optical filters that block unwanted radiation such as that emanating from the sun or tungsten filament lamps.

5 The infra-red flame detectors shall be designed to be sensitive to modulation of the received radiation in a small range of frequencies corresponding to the flicker of flames.

6 The infra-red flame detectors shall be designed to have high resistance to contamination and corrosion.

7 The electronic assembly of the infra-red flame detectors shall be encapsulated in high resistivity epoxy resin.

8 The infra-red flame smoke detectors shall include RFI screening and feed through connecting components to minimise the effect of radiated and conducted electrical interference.

9 The system may include, but not be limited to, the following version of infra-red flame detectors to meet different applications:

(a) analogue addressable -intrinsically safe

(b) conventional -intrinsically safe

10 The intrinsically safe versions of the infra-red flame detectors shall be suitable for use with safe area circuits.

11 The infra-red flame detector shall incorporate an LED, clearly visible from the outside, to provide indication of alarm actuation.

3.3 ENGINEERING

3.3.1 System Management Facilities
1 The control and indicating equipment shall incorporate the following system management facilities:

(a) isolate/reconnect a particular addressable point

(b) isolate/reconnect a particular detector zone

(d) walk test of a selected zone to verify detectors and sounders

(e) view the number of alarms since power up

(f) view the number of software initialisation since power up

(g) view common alarm status

(h) view common fault status

(i) view common disabled status

(j) view zonal alarm status

(k) view zonal fault status

(l) view zonal isolated status

(m) view point address status

(n) print event log

(o) print points isolated

(p) print points in detector condition monitoring fault

(q) print point statuses

2 Access to the facilities described in clause above shall be restricted to authorised personnel using coded password.

3 The control and indicating equipment shall have an event log capable of storing up to the last 500 events that have occurred. It shall be possible to view the content of the log via an alphanumeric display. Events shall be displayed in chronological order in any of the following three options:

(a) newest event first

(b) oldest event first

4 The control and indicating equipment shall be capable of isolating a group of selected detectors in areas of the building where maintenance work is carried out via a suitable timer unit. The detectors shall be automatically reinstated after a predetermined time.

5 The control and indicating equipment shall have a facility to enable the user to easily change the time and date settings of the system real-time clock.

3.3.2 Technical specification
1 The enclosure used to house the control and indicating equipment, standard system power supply and standard repeater panel shall not exceed the following overall dimensions unless otherwise stated in the Project Documentation:

Height: 400 mm

Width: 550 mm

Depth: 200 mm

2 The control and indicating equipment shall be light in weight. The complete unit including standard power supply unit and standard repeater unit shall not exceed 7 kg excluding the weight of batteries unless otherwise stated in the Project Documentation.

3 The control and indicating equipment shall operate on a mains power supply rated for 240 V AC .10% @ 50Hz .4%

4 The control and indicating equipment, standard power supply unit and standard repeater unit shall comply with the following environmental conditions unless otherwise stated elsewhere in the Project Documentation:

(a) operating temperature range 0o C to 55oC

(b) storage temperature 0o C to 65oC

(d) IEC protection category IP22 minimum

5 The control and indicating equipment, standard power supply unit and standard repeater unit shall comply with the EMC test requirements described in BS 5839 Pt.4 and the EEC requirements of the EMC Directive 89/336/EU and subsequent amendment 92/31/EU.

6 All equipment, including the fire alarm components and the control panel, shall be UL listed and shall be supplied from the same manufacturer. The manufacturer shall have a minimum of 10 (ten) years active experience in the manufacturing of fire alarm systems.

3.3.3 Cabling
1 Unless specified elsewhere in the Project Documentation, the cabling and wiring used in the fire alarm system shall comply with the provisions this Clause.

2 The cabling and wiring to be used in the system shall be fire resistant and approved to British Standard and LPCB specifications for use in fire detection and alarm systems.

3 Wiring used for driving devices requiring high currents (e.g. bells) shall limit the voltage drop to less than 10% of the nominal operating voltage.

4 Cables used for the transmission of system data and alarm signals shall be in accordance with the types recommended by the manufacturer of the fire alarm system.

5 The ends of all cables shall be sealed by means of proprietary seals and associated glands. No heat shall be applied to any seal or termination. Cable tails shall be insulated by means of gland PVC sleeving anchored and sealed into the seal.

6 Where protection of the cable glands is required or terminations are on display, the glands shall be enclosed in red coloured shrouds of the appropriate British Standard colour.

7 All cables to brick/concrete shall be securely fixed by means of copper saddles sheathed with red PVC. These saddles shall be provided near bends and on strength runs at intervals no greater than recommended in the British Standards or by the manufacturer.

8 Where multiple cables are to be attached to a wall or soffit, copper saddles shall enclose all cables and shall be secured by means of suitable masonry plugs and two round head plated wood screws.

9 Where multiple cables are to be attached to the top of horizontal trays they shall be neatly run and securely fixed at suitable intervals. Copper or plastic cable fixings shall be used.

3.3.4 Addressable Manual Call Points
1 The addressable manual call points shall monitor and signal to the control and indicating equipment the status of a switch operated by a „break glass. assembly.

2 The addressable call points shall comply with the relevant provisions of BS 5839: Part 2.

3 The addressable call points shall be capable of operating by means of thumb pressure and not require a hammer.

4 The addressable call points shall be capable of being mounted in weather-proof affording protection to IP65.

5 The addressable call points shall incorporate a mechanism to interrupt the normal addressable loop scan to provide an alarm response within less than 1 second.

6 The addressable call points shall be field programmable to trigger either an alert or an evacuate response from the control and indicating equipment.

7 The addressable call points shall be capable of being tested using a special „key. without the need for shattering the glass.

8 The addressable call points shall provide an integral red LED to indicate activation.

3.3.5 Manual Pull Stations
1 The manual fire alarm pull stations shall monitor and signal to the control and indicating equipment the status of a switch operated by manual pulling down of a handle or lever.

2 The stations shall be capable of operating by hand pull and does not require special instrument.

3 The stations shall be capable of being mounted in weather-proof affording protection to IP65.

4 The pull station shall incorporate a mechanism to interrupt the normal addressable loop scan to provide an alarm response within less than 1 second.

5 The points shall be capable of being tested using a special „key. without actually initiating the alarm signal.

6 A glass cover shall be provided to deter the accidental or malicious activation of the manual call stations. After actuation, the cover can be replaced, and the system reset by use of a key only.

3.4 MODULES

3.4.1 Remote Indicator Module
1 The remote indicator module shall provide a remote indication for any conventional or analogue addressable detector that may be located in an enclosed or locked compartment.

2 The remote indicator module shall be driven directly from its associated local detector.

3 The connection to the remote indicator module shall be monitored for open and short-circuit.

3.4.2 Conventional Detector Interface Module
1 The conventional detector interface module shall monitor and signal to the control and indicating equipment the status of up to 20 conventional detectors and manual call points.

2 The conventional detector interface module shall be capable of monitoring automatic detector and manual call points from existing conventional systems.

3 The conventional detector interface module shall operate from a monitored 24 V AC power supply.

4 The conventional detector interface module shall operate integral red LED indication when in the alarm state.

3.4.3 Addressable Relay Output Module
1 The addressable relay output module shall provide a volt free changeover relay contact operated by command from the control and indicating equipment.

2 The contacts of the addressable relay output module shall be rated for minimum of 1 Amp at 24 V DC.

3 The addressable relay output module shall monitor the relay coil open-circuit and transmit the fault signal to the control and indicating equipment.

4 The addressable relay output module shall derive its operating power from the addressable loop.

5 The addressable relay output module shall provide a red LED indication that the relay has operated.

3.4.4 Addressable Contact Monitoring Module
1 The addressable contact monitoring module shall provide monitoring of the status of switched input signals from either normally open or normally closed contacts.

2 The addressable contact monitoring module shall provide a red LED indication when the contact has operated.

3 The addressable contact monitor module shall derive its power directly from the addressable loop.

3.4.5 Addressable Sounder Driver Module
1 The addressable sounder driver module shall be capable of monitoring and driving a circuit of alarm sounders.

2 The output of the addressable sounder driver module shall be rated at 500 mA.

3 The addressable sounder driver module shall be capable of operating the sounders in a pulsing or continuous mode as determined by the control and indicating equipment.

4 The addressable sounder driver module shall provide the facility to monitor for failure of the power supply for the sounders and transmit the necessary fault signal to the control and indicating equipment.

5 The addressable sounder driver module shall provide a red LED indication that the sounder circuit has been actuated.

3.4.6 Sounder Booster Module
1 The sounder booster module shall be capable of monitoring and driving a heavy duty circuit of sounders up to 15 Amps.

2 The sounder booster module shall be capable of interfacing either to the common sounder outputs of the control and indicating equipment or to the output of the addressable sounder driver module.

3 The sounder booster module shall be designed to maintain the monitoring of the sounder circuit and transmit a fault signal either via the addressable sounder driver module or directly to the control and indicating equipment.

3.4.7 Addressable Power Supply Module
1 The addressable power supply module shall be capable of supplying up to 24 V DC. 3 Amps of power to local sounder circuits and ancillary equipment.

2 The addressable power supply module shall derive its power from the 240 V AC mains supply.

3 The addressable power supply module shall be able to contain and maintain in a charged state a 24 V battery set of up to 15 Ah capacity.

4 The addressable module shall monitor the mains power supply and the battery and transmit a fault signal as appropriate to the control and indicating equipment.

3.4.8 Smoke Damper Module
1 The smoke damper module shall provide the inputs and outputs required to monitor and control a smoke damper.

2 The smoke damper module shall be fully addressable and provide one volt-free changeover relay contact rated for 240 V AC @ 5 Amps.

3 A separate 24V DC supply shall be provided to operate the changeover relay.

4 The changeover relay contact of the smoke damper module shall be monitored and controlled by commands signalled from the fire alarm system control panel via the addressable loop.

5 The smoke damper module shall be capable of monitoring up to two external relay contacts.

6 The module shall derive its power directly from the addressable loop.

7 The outputs of the smoke damper module shall be capable of being controlled using a keypad via the addressable loop.

8 The keypad shall be capable of forcing the relay outputs LOW, HIGH or AUTO. It shall also be capable of reading the status of the relay outputs.

9 The smoke damper module shall have a red LED, clearly visible on the fascia panel of the unit, to provide an indication of relay operation.

3.4.9 Plant Interface Module
1 The plant interface module shall provide inputs and outputs required to monitor and control any plant and machinery.

2 The plant interface module shall be fully addressable and provide multiple volt-free DPDT changeover relay contacts rated for 240 V AC @ 5 Amps.

3 A separate 24 V dc supply shall be provided to operate the changeover relays.

4 The changeover relay contacts of the plant interface module shall be monitored and controlled by commands signalled from the fire alarm system control panel via the addressable loop.

5 The module shall be capable of monitoring multiple external relay contacts.

6 The plant interface module shall derive its power directly from the addressable loop

7 The plant interface module shall be capable of being link-configured to provide 2 inputs/2 outputs, 4 inputs/4 outputs or 6 inputs/6 outputs as required and specified in the Project Documentation.

8 The plant interface module shall have six consecutive addresses provided for configuration.

3.5 MONITORING

3.5.1 Fire monitoring
1 The control and indicating equipment 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.

2 The control and indicating equipment shall monitor the status of all internal connection and interfaces, including charger, battery and remote signalling functions.

3 The control and indicating equipment shall provide the following discrete visual indications:

(a) power on green LED indicator

(b) fire alarm dual red LED indicator

(d) disabled/isolated yellow LED indicator

(e) fire zones red LED indicator per zone

4 In addition to the indications provided in Clause 3.5.1-3, the control and indicating equipment shall also have an integral LCD alphanumeric back-lit display unit. In order that an easy identification of different information is provided, the LCD display shall be arranged in the following categories:

(a) event type

(b) zone message

(d) circuit identifier point number/zone number of events in the system

5 The control and indicating equipment shall provide a set of push button controls to enable an authorised operator to perform the following:

(a) evacuate - actuates ALL alarm sounders in the system

(b) silence - stop all currently actuated alarm sounders

6 The control and indicating equipment shall provide a facility to manually check all the discrete LED indicators. This shall be clearly marked LAMP TEST and be accessible at all time.

7 The control and indicating equipment shall provide a simple to operate keypad to enable the user to access the various built-in functions, and interact with the information displayed on the LCD. For security reasons, the control and indicating equipment shall provide a customer configurable password code facility in accordance with the relevant provisions of BS 5839 for the following levels of access:

(a) user operator Access Level 3

(b) user engineer Access Level 1

(d) civil defence engineer Access Level 3

(e) alarm company engineer Access Level 3

8 The control and indicating equipment shall provide facilities to drive visual indication LED mimic displays for each of the following zonal status:

(a) alarm

(b) fault

9 The control and indicating equipment shall provide facilities for signalling the following system conditions to a remote (Central Station) and/or an on-site monitoring centre:

(a) alarm

(b) pre-alarm

(d) zone isolated

10 The control and indicating equipment shall be capable of monitoring and controlling remote site devices, such as door release unit and relays for the control of plants and dampers, directly from the addressable loops.

11 The control and indicating equipment 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 fire door to close.

3.5.2 Fault and Warning Monitoring
1 The control and indicating equipment shall interrogate each addressable device at least once every 5 seconds.

2 The control and indicating equipment shall incorporate fire decision algorithms specifically adapted to the response characteristics of the analogue addressable detectors employed.

3 The algorithms shall perform a trend analysis of the signal received from the analogue addressable detectors in order that non-fire events may be differentiated.

4 The control and indicating equipment shall be designed so that, each type of analogue addressable detector, the overall responses time, including that for the sensor, the signal transmission system and the fire decision algorithm, meets the requirement of the relevant provisions of BS 5445 (EN 54).

5 The response time of the control and indicating equipment to two-state addressable detectors and conventional detectors shall not exceed 10 seconds.

6 The control and indicating equipment shall have a special scanning sequence so that designated manual call points provide alarm indication and warning within 1 second of operation.

7 The control and indicating equipment shall have a facility to automatically adjust the sensitivity of analogue detectors to a higher level for periods of time when the building is unoccupied.

8 The control and indicating equipment shall have, as an optional software enhancement, the ability to automatically adjust the alarm and pre-alarm threshold levels to compensate for changes in detector sensitivity due to contamination over a period of time.

9 The control and indicating equipment shall have, as an optional 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.

3.5.3 Supervision and Fault Reporting
1 The control and indicating equipment shall monitor all critical system components and interconnections (internal and external). In the event of a failure occurring which prevents correct operation of the alarm functions, a FAULT indicator will light and message shall be given on the alphanumeric display within 100 seconds of occurrence.

2 The following faults shall be reported.

(a) loop short circuit

(b) loop open circuit

(d) addressable device failure

(e) device not responding

(f) incorrectly configured device

(g) detector condition monitoring warning

(h) conventional call point wiring open circuit

(i) conventional call point wiring short circuit

(j) conventional detector circuit wiring fault

(k) repeater/repeater LCD, remote printer failure

(l) power supply unit (PSU) fault

(m) charger fault

(n) battery fault

(o) battery critical

(p) mains failure

(q) auxiliary power supply unit (PSU) failure

(r) relay output stuck

(s) signalling fault

(t) sounder wiring open circuit

(u) sounder wiring short circuit

3 To help rapid fault finding and repair, the control and indicating equipment shall provide text messages to indicate the precise location of where a fault has occurred in the system.

4 The control and indicating equipment shall be capable of monitoring and indicating the status of auxiliary units, such as a remote signalling transmitter. This shall be achieved using a suitable addressable contact monitor module.

5 The control and indicating equipment shall have the facility to delay the generation of an event to confirm operation of the monitored device. This shall be either 6 seconds for normal non-fluctuating contacts, or 40 seconds for fluctuating contacts, e.g. sprinkler flow valve switches.

3.5.4 Alarm Output Functions
1 The control and indicating equipment shall provide the necessary outputs to separately operate two monitored circuits of common system sounders. Each output shall be capable of driving a sounder load of up to 1 Amp.

2 The control and indicating equipment shall be able to monitor and control the integrity of zonal sounder circuits via a suitable addressable module.

(a) The control and indicating equipment 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. Three possible sound output signals shall be available as follows:

(b) alert pulsed tone (1 second ON, 1 second OFF)

(d) user definable tone for specialised events (e.g. boom alert).

3 The control and indicating equipment shall have the facility to change, on a per sounder zone basis, the sound output dependent upon whether the source of alarm is:

(a) an automatic detector (e.g. smoke or heat)

(b) a manual call point

(d) a non-fire event (e.g. plant alarm)

4 The control and indicating equipment shall be capable of generating customer definable time delay sequences to upgrade alarm sounder responses, without the need for external timers, as follows:

(a) silent to alert

(b) alert to evacuate

5 The control and indicating equipment shall have the ability to delay the transmission to the Civil Defence Department of fire alarm signals from automatic detectors in pre-determined detection zones. The time delay shall be configurable up to a maximum time of 2 minutes.

6 The control and indicating equipment shall provide the facility to automatically inhibit the delay function described in clause above when the building is unoccupied.

3.5.5 Voice Evacuation Systems
1 The control and indicating equipment shall be capable of operating addressable voice alarm units and monitoring the integrity of the wiring connection to individual loudspeakers.

2 The system shall include power supply unit, amplifier, tone generator, synthesisers, message player, loudspeakers, cable and wiring system and other accessories required for independent operation.

3 The control and indicating equipment shall provide, additionally when specified in the Project Documentation, an interface to drive the public address system of the building in accordance with the relevant provisions of BS 5839: Pt.1. The system shall be arranged such that, in the event of a failure of the public address system, back-up sounders are available to alert or evacuate the relevant areas of the protected premises.

4 The fire alarm signal shall automatically activate the voice evacuation system and shall broadcast a suitable evacuation call (either pre-recorded or synthesised) over the loudspeaker system, independent of operator.s action. At least one fire microphone should normally be sited near to the control panel for manual call for evacuation. To avoid confusion, the system should be so designed that both automatic call and operators call can not be broadcast simultaneously.

3.6 INSTALLATION

3.6.1 General
1 Correct installation, combined with the use of high quality equipment, components and cabling ensures that the fire detection and alarm system shall operate as designed and provide many years of trouble free service.

2 The Contractor shall install the alarm system in accordance with the manufacturer.s documented installation instructions.

3 The Contractor shall provide all relevant installation documentation required for each component of the system.

4 Installation of the system shall be in accordance with the relevant provisions of BS 5839: Part 1 and BS 7671.

5 The Contractor shall be responsible for the correct sitting of all equipment and components of the system in accordance with the Project Documentation.

6 All cabling and wiring shall be tested before they are connected to the fire controller and its associated devices. The Contractor shall note that if the tests are carried out after the cables and wires have been connected to the controller and its devices, components within the controller and devices will be damaged by high voltages used during testing.

7 At detector and sounder locations, cables shall be terminated in approved black enamelled/galvanized junction boxes. All other devices forming part of the system shall utilise dedicated/custom back boxes.

3.6.2 Installation of Detectors
1 All detectors (and bases) shall be installed in accordance with the relevant provisions of BS 5839: Part 1, BS 7671 and the installation instructions provided by the manufacturer.

2 The number and type of detectors required to be installed shall be as detailed on the Project Drawing. The location of each type of detector installed shall generally be as shown on the Project Drawings but their final position shall be determined on site.

3 All detector bases shall be securely fixed to boxes and allow for easy fitting and removal of detectors.

4 Cable and wire entries to detector bases shall be fitted with grommets to prevent possible damage to the insulation.

5 Cable and wire strain relief clamps shall be provided at all entries to detector bases.

6 Cable entries of detector bases used in environments with abnormal atmospheric or operating conditions shall be appropriately sealed to prevent ingress of dust, water moisture or other such contaminants.

3.6.3 Installation of Control Devices
1 All control devices (e.g. call points, sounders, interface modules, etc.) shall be installed in accordance with the relevant provisions of BS 5839: Part, BS 7671 and the installation instructions provided by the manufacturer.

2 The location of control devices and associated modules to be installed shall generally be as shown on the Project Drawings but their final position shall be determined on site.

3 The type of control device installed in each particular location shall be the type specified in the Project Documents.

4 All control devices and associated modules shall be securely fixed, and if required, marked with appropriate notices, warnings, signs as applicable.

5 Cable and wire entries to all control devices and associated modules shall be fitted with grommets or glands so as to prevent possible damage to the insulation.

6 Cable entries of control devices and associated modules used in environments with abnormal atmospheric or operating conditions shall be appropriately sealed to prevent ingress of dust, water, moisture or other such contaminants.

3.6.4 Installation of Fire Controller Equipment
1 The fire controller equipment shall be installed in accordance with the relevant provisions of BS 5839: Part 1, BS 7671 and the installation instructions provided by the manufacturer.

2 The installation location of the fire controller and its associated component parts shall generally be as shown on the Project Drawings but their final position shall be determined on site.

3 The type of fire controller and its associated component parts installed shall be the type specified in the Project Documentation.

4 The fire controller equipment shall be securely fixed, and if required, marked with appropriate notices, warnings, signs as applicable.

5 Cable and wire entries to the fire controller and associated devices shall be fitted with grommets or glands to prevent possible damage to the insulation.

6 The fire alarm system mains power connections to the fire controller equipment shall be accordance with the guidelines set out in the relevant British Standards and the installation instructions provided by the manufacturer.

7 The fire alarm system mains power isolating switch shall be coloured red and clearly labelled “FIRE ALARM: DO NOT SWITCH OFF”.

8 Each circuit of the system shall be connected to the fire controller via associated fuse or circuit breaker devices located within the fire controller unit.

9 All cables from the fire controller equipment to the detection and alarm devices shall be clearly labelled as part of the fire detection and alarm system.

END OF PART