One to Two Loop Fire Alarm Control Panel Overvie · Web view1 Single Loop Fire Alarm Control Panel 2 2 One to Two Loop Fire Alarm Control Panel 7 3 One to Five Loop Fire Alarm Control

Ventcroft Ltd Sample SpecificationsFor Electrical Consultants, Local Authority’s and University’s etc.

Contents:

Item Description Page No.1 Single Loop Fire Alarm Control Panel 22 One to Two Loop Fire Alarm Control Panel 73 One to Five Loop Fire Alarm Control Panel 124 Fire Alarm Control Panel Networking 175 Analogue Addressable Devices 216 Conventional Devices 26

Sample Specification

ANALOGUE ADDRESSABLE FIRE ALARM CONTROL PANEL SINGLE LOOP

OverviewThe design of the control equipment shall offer a simple, cost effective & reliable product. The system shall be easily configured using ‘plug-in’ addressable loop driver and communication modules. Further ‘plug-in’ modules shall be available to allow the expansion of programmable inputs and outputs.

Analogue Addressable Detection LoopThe control panel shall provide a single analogue addressable detection loop, using one loop driver module.

Supported Detection ProtocolsIn accordance with the more common types of detection equipment available the supported protocols must include the following as a minimum:

Nittan AS PROTOCOL

The control panel shall support a single analogue loop with the capability to control up to 126 addresses.

Specification – July 2002 2

Electrical SupplyThe Power Supply shall operate on 230 VAC, 50 Hz, and shall provide all necessary power for the control panel. In the event of a mains electrical failure, the fire alarm control panel shall have the capability of being supported in its intended state by standby batteries. The fire alarm control panel shall be fitted with an integral 0.7 Amp battery charger, current limited with DDP for 24 V lead acid batteries. The battery charger must be capable of being up-graded in capacity to facilitate larger systems.

Sounder OutputA minimum of two on-board sounder circuits shall be provided. The sounder outputs shall be fully programmable, monitored and short circuit protected. Each circuit shall support a load of 1 Amp. with a total panel loading of 1.3 Amps.

In the event that further sounder circuits are required it shall be possible to add further outputs to the panel via the detection loop and the dedicated RS485 peripheral bus. The peripheral bus shall support up to 15 additional 4 way sounder output cards if required.

Auxiliary RelayThe panel shall incorporate as standard 1 x failsafe fault output and 1 x fully programmable fire output each with volt-free changeover contacts rated at 24 V AC/DC, 1 Amp maximum. It shall be possible to add further programmable changeover relay contacts to the panel via the detection loop and the dedicated RS485 peripheral bus. It shall be possible to connect up to 400 fully programmable outputs to the fire alarm control panel in this manner.

Display, Indication and OperationThe panel shall have 14 general panel status LED’s. An alphanumeric liquid crystal display shall give 80 characters of information on a 2-line display. The display will be illuminated to aid viewing under dim ambient light conditions.

20 number zonal fire indicators (LED’s) and 20 number zonal fault/test/disabled (LED’s) shall be provided.

An on-board alphanumeric keypad with 17 keys shall allow the complete control and configuration of the system. Alternatively the panel shall be programmed using PC based upload/download software.Four separate pushbuttons shall provide control of Sound Alarms (Evacuate), Silence/Resound, Mute/Accept and Reset, and shall be located adjacent to the main LED indication via entry level enable code.


CommunicationA communications port with connections for an optional plug-in RS485 module shall be available for connection with peripheral devices. The peripheral bus shall support a further 126 addresses in addition to the detection loop. Peripheral devices shall include; display only and active repeater panels, remote printers, 8-way input cards and 4-way sounder & relay cards.

A dedicated RS232 port shall be available for both connections to a local printer and upload/download of configuration data via the manufacturer’s standard PC programming tool.

User Control LevelsThe fire alarm control panel shall have three user control levels.

At all three levels, the LED displays shall indicate the condition of the installation, the zone LED’s shall indicate the location of any fire alarm or fault and the alphanumeric display shall provided detailed fire alarm or fault information.

Level 1 - All displays shall be functional, but the front panel controls shall be inhibited.

Level 2 - All displays and all front panel controls shall be functional. Changes to the system configuration shall not be accessible at this level. User Level 2 shall be reached by entering a unique 4 digit password from level 1.

Level 3 - All front panel controls shall be functional and full system configuration and programming shall be possible. User level 3 shall be reached by entering a unique 4 digit password from either level 1 or level 2. User level 3 shall be for use by the system installer / maintenance contractor.

A level 2 password shall not allow access to level 3 functions.

Up to 10 level 2 passwords shall be definable from level 3.


Commissioning Of Control PanelsOn completion of the installation, the system shall be commissioned in accordance with the relevant standards, manufacturer guidelines and requirements of the system design. The fire alarm control panel shall have an auto learn facility that will allow the system to learn the number and type of devices that been installed on the detection loop.

A walk test option shall be provided for convenient testing of detectors and alarm initiating devices without continually having to reset the panel. This facility shall allow selected zones only to be tested without the need to have the entire system in walk test. During the period in which the fire alarm control panel is in the walk test mode, an active scrolling message shall remain on the LCD display at all times, indicating the zones in test mode.

Program IntegrityA program integrity option shall display the panel software version along with ROM and RAM checksums. The RAM checksum shall alter whenever the configuration is changed. For example, the checksum figure shall change when either adding or removing devices or changing text assignments. After the final configuration has been entered the program integrity shall be checked and the RAM checksum figure recorded.

Day ModesThe fire alarm control panel shall have the ability to automatically invoke different operating modes according to the time of day. Each mode shall have adjustable start and finish times. Outside of the designated start and finishing times, the panel shall revert to normal operation. The operating modes will consist of:

Delayed mode - During the day or night the alarm signal from the detection points shall be immediately recognised and identified on the panel display, but no outputs switched on until staged timers have expired. Manual call points shall always override this mode.

Sensitivity mode - Shall allow smoke and temperature detectors to use different pre-alarm and fire alarm thresholds during day and night mode.

Verification mode – Shall allow smoke detectors to tolerate transient alarms according to the programmed verification delay time during either day or night.

Event LogThe fire alarm control panel shall store the last 500 events. It shall be possible to set the event log to either "diagnostic" or "normal" mode. Normal is the default mode.

When in diagnostic mode the log shall record every event including single response failures from a device. The diagnostic mode shall aid the engineer to determine spurious or transient fault conditions including loop wiring and detector problems, particularly if these are intermittent.


Displayed IdentificationDuring normal panel operation, when the fire alarm control panel is operating correctly, the LCD display shall display a message that identifies the system installer / maintenance company, this display shall feature up to 20 characters

If a fault occurs on the fire alarm control panel the LCD display shall automatically show a telephone number to call for assistance, this display shall feature up to 20 characters.

Cause-and-effect programmingThe panel shall provide a flexible way of performing complex cause-and-effect programming. This shall include mapping individual detectors and call points to outputs as well as mapping outputs relative to zones in alarm.



ANALOGUE ADDRESSABLE FIRE ALARM CONTROL PANELONE TO TWO LOOP

OverviewThe design of the control equipment shall offer a simple, cost effective & reliable product. The system shall be easily configured using ‘plug-in’ addressable loop drivers and communication modules. Further ‘plug-in’ modules shall be available to allow the expansion of programmable inputs and outputs.

Analogue Addressable Detection LoopThe control panel shall be capable of expansion in order to provide up to two analogue addressable detection loops, using ‘plug-in’ loop driver modules.


Nittan AS PROTOCOL

The control panel shall support a single analogue loop with the capability to control up to 126 addresses.







20 number zonal fire indicators (LED’s) and 20 number zonal fault/test/disabled (LED’s) shall be provided.

An on-board alphanumeric keypad with 17 keys shall allow the complete control and configuration of the system. Alternatively the panel shall be programmed using PC based upload/download software.

Four separate pushbuttons shall provide control of Sound Alarms (Evacuate), Silence/Resound, Mute/Accept and Reset, and shall be located adjacent to the main LED indication via entry level enable code.

Networking and CommunicationThe panel shall have two serial communication ports. An optional “plug-in” RS485 or RS232 card will support a PC front-end graphics package or panel network connection. An RS485 peripheral bus shall support a further 126 addresses in addition to the detection loops. Peripheral devices shall include; display only and active repeater panels, remote printers, 8-way input cards and 4-way sounder & relay cards.

A dedicated RS232 port shall also be provided for both connection to a local printer and upload/download of configuration data via the manufacturer’s standard PC programming tool.











A walk test option shall be provided for convenient testing of detectors and alarm initiating devices without continually having to reset the panel. This facility shall allow selected zones only to be tested without the need to have the entire system in walk test. During the period in which the fire alarm control panel is in the walk test mode, an active scrolling message shall remain on the LCD display at all times, indicating the zones, which are in test mode.



Delayed mode - During the day or night the alarm signal from the detection points shall be immediately recognised and identified on the panel display, but no outputs switched on until staged timers have expired. Manual call points shall always override this mode.











ANALOGUE ADDRESSABLE FIRE ALARM CONTROL PANELONE TO FIVE LOOP

OverviewThe design of the control equipment shall offer a simple, cost effective & reliable product. The system shall be easily configured using ‘plug-in’ addressable loop drivers and communication modules. Further ‘plug-in’ modules shall be available to allow the expansion of programmable inputs and outputs.

Analogue Addressable Detection LoopsThe control panel shall be capable of expansion. Capacity of up to five analogue addressable detection loops, using five plug-in loop driver modules shall be available.


Nittan AS PROTOCOLThe control panel shall support a single analogue loop with the capability to control up to 126 addresses.







20 number zonal fire indicators (LED’s) and 20 number zonal fault/test/disabled (LED’s) shall be provided. It shall be possible to increase the number of zonal fire and fault/test/disabled LED’s to a maximum of 80 simply by “plug in” extender cards.

An on-board alphanumeric keypad with 17 keys shall allow the complete control and configuration of the system. Alternatively the panel shall be programmed using PC based upload/download software.

Four separate pushbuttons shall provide control of Sound Alarms (Evacuate), Silence/Resound, Mute/Accept and Reset, and shall be located adjacent to the main LED indication via entry level enable code.


Networking and CommunicationThe panel shall have two serial communication ports. An optional “plug-in” RS485 or RS232 card will support a PC front-end graphics package or panel network connection. An RS485 peripheral bus shall support a further 126 addresses in addition to the detection loops. Peripheral devices shall include; display only and active repeater panels, remote printers, 8-way input cards and 4-way sounder & relay cards.

A dedicated RS232 port shall also be provided for both connection to a local printer and upload/download of configuration data via the manufacturer’s standard PC programming tool.









A walk test option shall be provided for convenient testing of detectors and alarm initiating devices without continually having to reset the panel. This facility shall allow selected zones only to be tested without the need to have the entire system in walk test. During the period in which the fire alarm control panel is in the walk test mode, an active scrolling message shall remain on the LCD display at all times, indicating the zones in test mode.




Delayed mode - During the day or night the alarm signal from the detection points shall be immediately recognized and identified on the panel display, but no outputs switched on until staged timers have expired. Manual call points shall always override this mode.











ANALOGUE ADDRESSABLE FIRE ALARM CONTROL PANEL NETWORK

OverviewThe connection between networked panels shall be a daisy-chain type RS485 communications link. An RS485 interface module shall be provided at each panel for each network link to which it is connected.

The total length for each daisy-chain network link shall not exceed 1.2km.

The network cabling shall be screened, twisted pair or equivalent and shall be routed so that it does not run alongside other cables.

In case of a fault on the network wiring, the network master panel shall warn of the problem. Individual panels shall continue to operate as stand-alone units.

Where it is necessary to exceed 1.2km on an individual network link, or where a fault tolerant loop is required for enhanced system integrity. It shall be possible to include a Hi485 interface at each panel location.

ArchitectureIt shall be possible to network together, up to twenty panels of up to 5 loops each, with one panel designated to act as the master panel.

It shall be possible to connect sub-master panels as well as slave panels to a master control panel. It shall be possible to network up to 99 panels together using dedicated master and sub-master control panels.

It shall be possible to use master or sub-master panels for fire detection by fitting the appropriate loop driver modules.

The master panel shall have the facility to be connected to a graphics PC.

ConfigurationIt shall be possible to configure all networks to operate on a shared zone basis, with common zone architecture for up to 200 zones, or as a report and control type system.

Shared Zone Network.This type of network configuration shall be used for a single site / building installation requiring a number of panels networked together with common zone architecture.

The panels shall act as one large system sharing from 20 to 200 common zones.

In the event of a fire alarm, the indications shall be as follows:

The location text message of the first alarm on the system shall be shown on the master panel and on all slave / sub-master panels.

The text message from subsequent alarms shall only be shown on the master panel and on the panel of origin. (NOTE: On the panel of origin, the local message shall override and replace any global message shown).

All panels, excluding the master panel, shall automatically scroll between the first four local alarm, text messages.


The master panel shall automatically scroll between the first four global alarm, text messages, regardless of origin.

The zone alarm LED indicators on ALL panels shall illuminate to show the zones in alarm on the overall system.

In case of a fire alarm or fault, the outputs (relays and sounders) shall operate as follows:

The outputs shall follow the transparent programmed zonal settings in each of the panels.

All outputs programmed to a particular zone, irrespective of the panel to which they are connected or the panel that raised the alarm, shall perform as programmed when an alarm is detected in that zone.

The maximum number of outputs per panel shall be 400.

The system control functions shall operate as follows:

The standard system control functions (sound alarms, silence / resound, mute / accept and system reset) shall operate on a peer-to-peer basis. For example, a sound alarms (manual evacuation) raised at any panel, or active remote annunciator (fire system repeater), shall cause all of the panels to sound alarms and all sounder outputs shall activate.

It shall be possible for individual devices to be disabled or enabled either at the local panel or from the master panel.

It shall be possible to ‘configure’ or ‘inspect’ devices from the local panel only.

Ancillary Equipment shall operate as follows:

As the network operates on a shared zone basis, zonal specific outputs (relays and sounders) shall be attached to the peripheral channel or signaling loop circuit on any panel.

Remote annunciators (fire system repeater units) shall display the text messages as shown on the panel to which the annunicator is connected.

It shall be possible to connect a graphics PC to the network. If required, the graphics PC shall be connected to the master panel.

Report and Control NetworkThis type of network configuration shall be used for a multiple site / building installation requiring a number of individual panels or sub-systems networked together for reporting and control purposes only.

This type of network shall function in the same way as a shared zone network. However it shall not restrict the overall installation to shared zones.

In the event of a fire alarm, the indications shall be as follows:

The location text message of the first alarm on the system shall be shown on the master panel and the panel of origin of the alarm. Optionally, other panels may display the origin of the alarm.

The text messages from subsequent alarms shall only be shown on the master panel and the panel of origin of the alarm.

The zone LED indicators will only be illuminated on the panel of origin of the alarm.

In case of a fire alarm or fault, the outputs (relays and sounders) shall operate as follows:

The outputs shall follow the programmed zonal settings in the panel to which they are connected.


Other panels on the network, including the master panel(s), can be programmed so that in case of an alarm from another panel they can:

a) Activate their individual sounder circuits (on-board, peripheral link and signaling loop outputs).

b) Pulse their individual sounder circuits (on-board, peripheral link and signaling loop outputs).

c) Activate their individual relay circuits (on-board, peripheral link and signaling loop outputs).

The system control functions shall operate as follows:

The master panel shall control the entire network system with silence / resound, mute / accept and system reset. The system should ONLY be reset from the master panel.

Other panels shall be individually programmed to allow or prevent peer-to-peer control for silence / resound, mute / accept and system reset.

The master panel ‘sound alarms’ control function shall normally activate the sounders connected to the master panel only. Other panels shall be programmed to activate their sounders using the system events function, if required.

It shall be possible for individual devices to be disabled or enabled either at the local panel or from the master panel.

It shall be possible to ‘configure’ or ‘inspect’ devices from the local panel only.


Ancillary Equipment shall operate as follows:

If the network does not operate on a shared zone basis, zonal specific outputs (relays and sounders) shall be attached to the peripheral channel or signaling loop circuit of the panel to which the specific zone is assigned.

Remote annunciators (fire system repeater units) shall display the text messages as shown on the panel to which the annunicator is connected.

It shall be possible to connect a graphics PC to the network. If required, the graphics PC shall be connected to the master panel.



ANALOGUE ADDRESSABLE DEVICES

Addressable Manual Call PointsAddressable Manual Call Points shall be provided to connect to the Fire Alarm Control and Indicating Equipment (C.I.E.) loops.

The Manual Call Points shall, on command from the Control and Indicating Equipment (C.I.E.), send data to the C.I.E. representing the state of the manual switch.

Manual Fire Alarm Call Points shall use a key operated test without the need to break the glass, and shall be designed so that after Emergency operation, they cannot be restored to normal use except by the replacement of the glass element.

All operated Manual Call Points shall have a positive, visual indication of operation by means of an LED indicator.

Manual Call Points shall be constructed of flame retardant plastic with clearly visible operating instructions provided on the glass. The word FIRE shall appear on the front of the Call Points.

Manual Call Points shall be suitable for surface mounting, or semi-flush mounting as required.

Manual Call Points shall provide address-setting by means of decimal (Dil) switches only. Other methods are not acceptable.

Intelligent Photoelectric Smoke SensorsSmoke Sensors shall be intelligent and addressable devices and shall connect to one of the C.I.E. loops. The Sensors shall use the photoelectric (light-scattering) principal to measure smoke density and shall, on command from the C.I.E., send data to the C.I.E. representing the analogue level of smoke density.

Intelligent Ionisation Type Smoke SensorsSmoke Sensors shall be intelligent and addressable devices and shall connect to one of the control panel loops.

The Sensors shall use the dual-chamber ionisation principal to measure products of combustion and shall, on command from the C.I.E., send data to the C.I.E. representing the analogue level of products of combustion.

The sensors shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.7


Intelligent Grade 2 Heat SensorsHeat Sensors shall be intelligent and addressable devices and shall connect to one of the C.I.E. loops.

The Sensors shall use an electronic sensor to measure thermal conditions caused by a fire and shall, on command from the C.I.E., send data to the C.I.E. representing the analogue level the temperature at the sensor.

The detectors shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.5

Intelligent Smoke and Heat Sensors – General RequirementsAll the Intelligent Sensors detailed above shall incorporate the following facilities:-

Up to 126 intelligent Sensors may be connected to each loop.

The Sensors shall be ceiling-mount and shall include a twist-lock lockable base.

The Sensors shall provide address setting on the Sensor head using decimal switches only. Other methods of addressing are not acceptable.

The Sensors shall provide a single LED. The LED shall flash under normal conditions, indicating that the Sensor is operational and in regular communication with the C.I.E. The LED may be placed into steady illumination by the C.I.E., indicating that an alarm condition has been detected.

If required, the flashing mode operation of the Sensor LED shall be controlled through the system field program. An output connection shall also be provided in the base to connect an external remote alarm LED.

The sensors shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.5 and Pt.7 where applicable.

Operating Temperature: -10Deg.C to +50Deg.C.


Intelligent In-duct Smoke Sensor HousingIn-Duct Smoke Sensor Housing shall accommodate either an intelligent Ionisation Sensor or an Intelligent Photoelectric Sensor, to provide continuous analogue monitoring and alarm verification from the C.I.E.

When sufficient smoke is present within the sensor detection chamber, an alarm signal is initiated at the C.I.E., and appropriate action taken to change over air handling systems to help prevent the rapid distribution of toxic smoke and fire gases throughout the areas served by the duct system.

The In-Duct smoke unit shall incorporate a 'one pipe system', therefore achieving the ‘Venturi Principle’ by the use of a single pipe with two built-in channels which directs the airflow smoothly through the detector's chamber and return's the air back into the duct.

The photoelectric sensor used in the above In-Duct unit shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.7

The ionisation sensor used in the above In-Duct unit shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.7

Zone Monitor Module/Control ModuleAddressable Zone Monitor Modules shall be provided to connect one supervised zone of conventional Alarm Initiating devices. The unit also includes a relay output consisting of one set of volt free change over contacts.

The Monitor Module shall mount in a purpose made surface mount box.

The Monitor Modules shall provide address setting on the Module using decimal switches only. Other methods of addressing are not acceptable.

On board LED indications shall be provided for FIRE, PSU On, Short Circuit Monitoring and Polling/Transmission confirmation.

Sounder Control ModuleAddressable Sounder Control Modules shall be provided to supervise and control the operation of one conventional circuit of compatible, 24 VDC powered, polarised audio/visual indicating devices.

The Control Module shall mount in a purpose made surface mount box.

The indicating circuit may be wired for a maximum of 0.5 Amp (Inductive).

Audio/visual power shall be provided by a separate supervised remote power supply.

The Control Modules shall provide address setting on the module using decimal switches only. Other methods of address setting are not permitted.


Output ModuleAddressable Output Modules shall be provided to connect directly to the loop.

The Addressable Output Module shall have two output control functions which operate simultaneously, a relay output and an open collector output.

The relay output is a single pole, double throw type with normally open, normally closed and common contacts. The open collector user output is a transistor switch output, which switches to -S.

The Addressable Output Module shall mount in a purpose made surfacemount box.

The Output Modules shall provide address setting on the Module using decimal switches only. Other methods of addressing are not acceptable.

On board red LED indication shall be provided for FIRE.

Input ModuleAddressable Input Modules shall be provided to connect directly to the loop.

The Addressable Input Module is designed to collect a fire signal from a normally open clean contact device such as a sprinkler flow switch or similar.

The Addressable Input Module shall mount in a purpose made surface mountbox.

The Addressable Input Modules shall provide address setting on the Module using decimal switches only. Other methods of addressing are not acceptable.

On board red LED indication shall be provided for FIRE, switch-able on or off via on board adjustable link.


Isolator Modules (Boxed and Base Mounted)Isolator Modules shall be provided to automatically isolate wire-to-wire short circuits on a loop. The Isolator Module shall limit the number of modules or detectors that may be rendered inoperative by a short circuit fault on the loop. At least one isolator module shall be provided at either side of each zone of the building.

If a wire-to-wire short occurs, the Isolator Module shall automatically open-circuit (disconnect) the affected segment of the loop. When the short circuit condition is corrected, the Isolator Module shall automatically reconnect the isolated section of the loop.

The Isolator Module shall not require any address setting, and its operations shall be totally automatic. It shall not be necessary to replace or reset an Isolator Module after its normal operation.

The Isolator Module shall be available to mount in a standard purpose made surface mounted back box or as a ‘base-mounted’ version. Both versions shall provide a single LED that shall flash to indicate that the Isolator is operational and shall illuminate steadily to indicate that a short circuit condition has been detected and isolated.



CONVENTIONAL DEVICES

Photoelectric Area Smoke DetectorsPhotoelectric smoke detectors shall be 24 V D.C., two-wire, light scattering type using a LED light source.

Each detector shall contain a remote LED output and a built-in test switch.

The detector shall fit on to a twist-lock base with the facility to lock the detector in place.

The detector shall not alarm when exposed to air velocities of up to 15 Metres per second.

The detector screen and cover assembly shall be easily removable for field cleaning of the detector chamber.

All field wire connections shall be made to the base through the use of a clamping plate and screw.

The Detectors shall be listed by LPCB as meeting the calibrated sensitivity test requirements as detailed by (EN) BS 5445:Pt.7.

Ionisation Type Area Smoke Detectors Ionisation type smoke detectors shall be two-wire, 24 V D.C. type using a dual chamber principle.

Each detector shall contain a remote LED output and a built-in test switch.

The detector shall fit on to a twist-lock base and include the facility to lock the detector in place.

The detector shall not alarm when exposed to air velocities of up to 6 Metres per second. The detector screen and cover assembly shall be easily removable for field cleaning of the detector chamber.

All field wire connections shall be made to the base through the use of a clamping plate and screw.

The Detectors shall be listed by LPCB as meeting the calibrated sensitivity test requirements as detailed by (EN) BS 5445:Pt.7.


Heat Detectors (Grades 1,2,3 and Range 1)The heat detectors shall be 24 V D.C., two-wire, fast response type heat detectors.

The heat detectors shall be ceiling-mount and shall fit in to a twist-lock base having the facility to lock the detector in place.

An output connection shall also be provided in the base to connect an external remote alarm LED.

The Detectors shall be listed by LPCB as meeting the calibrated sensitivity test requirements of grades 1, 2, 3, and Range 1 response as detailed by (EN) BS 5445:Pt.5.

In-duct Smoke Detector HousingIn-Duct Smoke Detector Housing shall accommodate either an Ionisation Detector or a Photoelectric Detector, both of which shall provide continuous monitoring.

When sufficient smoke is sensed, an alarm signal is initiated at the fire alarm control and indicating equipment and appropriate action taken to change over air handling systems to help prevent the rapid distribution and isolation of smoke and fire gases throughout the areas served by the duct system.

The photoelectric sensor used in the above In-Duct unit shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.7

The ionisation sensor used in the above In-Duct unit shall be listed by LPCB as meeting the calibrated sensitivity test requirements of (EN) BS 5445:Pt.7

Manual Call PointsManual Call Points shall be provided to connect to the fire alarm control and indicating equipment-initiating circuits.

Manual Fire Alarm Call Points shall use a key operated test without the need to break the glass, and shall be designed so that after Emergency Operation, they cannot be restored to normal use except by the replacement of a glass element.

Manual Call Points shall be constructed of flame retardant plastic with clearly visible operating instructions provided on the glass. The word FIRE shall appear on the front of the Call Points.

Call Points shall be suitable for surface mounting, or semi-flush mounting as shown on the plans.


Documents

One to Two Loop Fire Alarm Control Panel Overvie · Web view1 Single Loop Fire Alarm Control Panel 2 2 One to Two Loop Fire Alarm Control Panel 7 3 One to Five Loop Fire Alarm Control