Installer s Handbook

8/20/2019 Installer s Handbook

1/32

Caradon Gent Limited

Waterside Road, Hamilton Industrial Park,

Leicester LE5 1TN.

INHB/2M/4/99


2/32

installer’sHANDBOOK

FIRE DETECTION SYSTEMS


3/32

Fire alarm systemsContents

I N T R O D U C T I O N

1

BS 5839 is a standard for Fire Detectionand Alarm Systems in Buildings. Part 1

of this standard is the code of practice for

installation and services.

It is important that any contractor or

installation engineer undertaking this

type of work is fully conversant with this

standard which covers systems from

simple manual installations to fullyautomatic fire detection systems. Whilst

the standard does make some reference

to fixed extinguishing systems the

protection of electronic data processing

installations is more fully covered by

BS 6266, 1982

This booklet, published by Caradon Gent

Limited - the UK’s largest manufacturerof fire alarm equipment - is intended to

be an installer’s guide which will offer

practical assistance. It is not intended to

replace BS 5839 Part 1.

Since the circumstances of installation of

a fire alarm system can vary, we recommend

that in cases of difficulty assistance is

sought by calling Caradon Gent Limited.Copies of British Standard BS 5839

Part 1, can be obtained from:-

The British Standards Institution,

Linford Wood, Milton Keynes,

MK14 6LE.

Page

System Design 2

Examples 13

False Alarms 15

Installation of Cables 16

Panel Installation 18

Check List 21

System Schematic 22

Fire Detection Circuits 23

Auxiliary Contacts 25

Commissioning 27

Installed System Tests 29

Trouble Shooting 30


4/32

S Y S T E M D E S I G N

2

The importance of pre-design planning cannot be overstated. Many parties are

likely to have an interest in a fire

detection and alarm system. Those who

should be consulted before the design is

finalised may include:

The System Installer

The Health & Safety Executive

The Building Control Officer

The Fire Insurer

The Local Fire Authority

Consultants (including architects andengineers) and perhaps:

The Communication Link Supplierand Central Alarm Receiving Station.

The considerations prior to design

which should also be detailed within the

specifications may include:

The purpose of the system

Occupant escape times

Fire Service attendance time

Other actions to be taken in theevent of a fire

Other occupants (particularly formultiple-occupancy)

Service and maintenancerequirements

System operation requirements andresponsibilities.

The two principal reasons for installing

a fire detection and alarm system are for

the protection of life and for the

protection of property. Each needs a

different approach to a system design

and equipment selection.Most buildings will need both life and

property protection to differing degrees.

There is a classification of systems in BS5839: Part 1: 1988 which is used in this

guide.

System for Protecting Property (P)

A satisfactory fire alarm system for the

protection of property will automatically

detect a fire at an early stage, indicate its

location and raise an effective alarm in

time to summon the fire-fighting forces

(both resident staff and the fire brigade).

Type P1 - A system covering all

parts of the premises.

Type P2 - A system covering only

those parts of a building

having a high fire risk.

Systems for Protecting Life (L, M)

A satisfactory fire alarm system for the

protection of life can be relied upon tosound a fire alarm while sufficient time

remains for the occupants to escape.

As a guide, an escape route may be

considered blocked once visibility drops

below 10 metres.

Type L1 - A system covering all parts

of the premises

Type L2 - A system covering only thoseparts of a building where

there is a high risk to life if

there is fire any where in the

building

Type L3 - A system covering only areas

critical to free passage along

escape routes.

Type M - A system that provides only

for manual initiation of analarm and therefore depends

on the presence of people.

Stage 1. Talk to interested parties


5/32


3

All manual call points whatever thesystem type should be sited:

On all escape routes and exits to the

open air.

So that nobody has to travel more

than 30 metres to reach one.

On floor landings and staircases.

In conspicuous and well-lit positions

against a contrasting background.

So that they can be seen easily. 1.4 metres above the floor.

Fixed Temperature Heat Detector

For protection of property, particularly

where temperature can fluctuate for

natural reasons:

Near large windows

Industrial heat producing processesBeam Detector

Although traditionally restricted to

specialist applications, beam detection

may provide more cost effective solutions

to point detection over long distances.

Corridors

Warehouses

Ceiling voids

Hangars Open shopping areas

Do not use in the direct line of sight of

an infra-red source such as tungsten or

high intensity arc lights.

Duct Detector

The duct housing unit is designed to

detect smoke in air conditioning

systems. It is fitted to the outside of theduct and has 2 probes that protrude

inside the duct to monitor the air.

Stage 2. Site Manual Call Points

It is important to have an adequate

number of detectors to fully cover the

areas requiring protection. Additionally

the type of detection must be matched to

the environment and the potential fire

hazards likely to be present.Optical Smoke Detectors

For slow smouldering fires.

Corridors or Escape Routes

Wood or paper stores

Do not use in steamy, dusty or smoky

areas such as kitchens, bathrooms etc

Ionisation Smoke Detectors

For fast burning, high energy fires.

Solvent stores

Switch rooms

A mixture of optical and ionisation

sensors can be used to ensure coverage in

areas of high value, like computer rooms.

Heat Detectors

Heat detectors are used where the

environment is subject to constant levels

of smoke or dirt. Boiler rooms

Busy kitchens and laundries

Stage 3. Select and site fire detectors


6/32

Under flat horizontal ceilings Diagram 1. Maximum dimensions:

Area covered by 1 detector:

Smoke 100m2 Heat 50m2

Distance between any part of the

wall and the nearest detector:

Smoke 7.5m Heat 5.3m

Distance between detector:

Smoke 15.0m Heat 10.6m

Diagram 2. Minimum dimensions: Distance between detector and

wall: 0.5m.

Maximum spacings between

detectors are reduced when

obstructions are present.

Spacing for Smoke Detectors


4

Stage 3. Site fire detectors (cont.)

End View

If less than150mm ignore

If greater than10% of ceilingheight treat aswall

0.5mMin

0.5mMin

Obstacle

Diagram 2.

MID POINT

OF AREA

MID POINT

OF AREA

7.5m 7.5m

7.5m

7.5m7.5m

5.3m 5.3m

5.3m

5.3m5.3m

Spacing for Heat Detectors


7/32

CorridorsDetectors in corridors may

generally be spaced more widely.

This is NOT applicable to

life safety applications unless all

adjoining rooms have smoke

detection.

This is NOT applicable to

corridors greater than 5 metres

wide (treat as for flat horizontal

ceilings)

Detectors may be placed at

horizontal distances extended

up to 50% of the difference

between the actual corridor

width and 5 metres (see table).

E.g. (5-2) x 0.5=1.5m.

Stage 3. Fire Detectors (cont).


5

Corridor Spacing between Detectors (max) width

(m) Smoke (m) Heat (m)

1.2 18.8 14.4

1.6 18.3 14.02.0 17.9 13.5

2.4 17.4 13.0

2.8 17.0 12.5

3.2 16.5 12.0

3.6 16.0 11.5

4.0 15.5 10.9

4.4 15.0 10.3

4.8 14.4 9.7

S S

H H

Plan View

SmokeDetector

SmokeDetector

HeatDetector

HeatDetector

7 . 5 + 1 . 5 m

7 . 5 + 1 . 5 m

7 . 5 + 1 . 5 m

7. 5 +

1. 5 m

7. 5 +

1. 5 m

7. 5 +

1. 5 m

17.9 m

5 . 3 + 1 . 5 m

5 . 3 + 1 . 5 m

5 . 3 + 1 . 5 m 5. 3 +

1. 5 m

5. 3 +

1. 5 m

5. 3 +

1. 5 m

13.5 m

2 m

2 m

Wall

Wall

Detector spacing along corridors.


8/32


6

Siting limits for Smoke Beam Detectors

Detector/ General applications Automatic link to a mannedSensor type centre. Fire brigade response is

normally within 5 minutes.

(m) (m)

Smoke 10.5 15.0

Heat grade 1 9.0 13.5

Heat grade 2 7.5 12.0

Heat high temp. 6.0 10.5

Beam 25 40

Minimum (m) Maximum (m)

Height of optical beam above floor 2.7 25*Optical beam length 1 100

Distance of optical beam from a flat ceiling or apex 0.3 0.6

Horizontal distance between optical beams measured at - 14right angles to a beam

Horizontal distance between optical beam and an adjacent See Notes 8 wall or partition

* The height may be increased to 40m provided that the general height to which combustibles are stored in thebuilding does not exceed 5m and that the fire brigade can attend within 5 minutes.

NOTE: Generally the beam should not pass closer, to a wall or partition, than 500mm and not closer to an obstruction,than 600mm. However, up to 3m of the beam may be closer than this. Always consult Gent if in doubt.

Where the beam detec tor is mounted in the apex of a pitched or ‘north-light’ roof the horizontal distance can be increasedby 1% for each degree of slope up to a maximum of 25% (eg 20º slope of roof 20% of 7.5m = 1.5m).

Pitched roofs

A row of sensors should be installed

along the apex of any pitched roof or

‘north-light’ roof. Smoke sensors should

be not more than 600mm from the apex

of the roof. Horizontal spacing between

sensors may be extended when used

under pitched roofs.

The horizontal distance may be extended

by up to 1% for each degree of slope of

the roof (relative to horizontal) up to a

maximum of 25%.

Wall

Roof Roof

600mmMax

20º pitch allows spacingto be extended 20% forexample from 7.5m to9.0m

20º

Heights

Maximum heights of detectors are dependant on the fire brigade response available:


9/32

Further considerations (checklist) For a Type P1 system every part of

the building should be suitably

protected. For this purpose each

effectively enclosed space should be

considered separately.

Areas covered by a Type P2 system

should be separated from unprotected

areas by a fire resisting construction.

Voids not more than 800mm deep

need not be protected unless fire can

spread through them from one to

the other.

Where rooms are divided by

partitions or storage racks reaching to

within 300mm of the ceiling each

section should be protected separately.

Shafts for elevators, lifts, hoists,

escalators and enclosed chutes

through floors and stairways should

be protected by detectors at the top

of the shaft and within 1.5m of

openings on to each floor.

Where an escalator or staircase has a

sloping ceiling a detector may need

to be sited on that ceiling. Enclosed staircases should be

protected by detectors on each main

landing within the staircase.

Lantern lights should be protected

by a detector unless they are less

than 800mm in height above the

ceiling and are not used as ventilation.

Extra detectors may be needed tocope with structural features within a

room. Consideration must be given

to possible adverse air flows when airconditioning and ventilation systems

are in use.

If a detector is concealed, it may be

desirable to provide a remote visible

indication of its operation.

Care should be taken when siting to

ensure that adverse conditions such

as high levels of shock or vibration

are not encountered.

Stage 3. Fire Detectors (cont).


7

Design Tip! It is good practice to site

detectors in toilets, however they

need not haveindependent coverage if cover is

provided in a common lobby.


10/32


8

Life ProtectingThe minimum sound levels must be

produced in all occupiable parts of the

building. Occupiable parts include

restricted areas such as service ducts

where people could be working on

occasion. As audible alarms are essential

for the protection of life, a minimum of

two independent sounders must always

be provided to guard against the failureof one. A minimum of

one sounder should be

provided in each fire

compartment.

Property Protection

In Type P systems the

minimum sound levels

must be produced in

the areas required tosummon fire fighting

assistance. A sounder

should also be provided

close to the control and

indicating equipment

and there should be

one outside to direct

services to the correct

entrance.In practice most fire

detection and alarm

systems involve

elements of both

property and life

protection.

Most systems should

therefore meet all the

above requirements.In general fire alarm sounders must not

be used for any other purpose, with the

established exception of class changes inschools where coded signals of not more

than five seconds duration can be used.

Public address equipment can be used to

give warning of fire subject to certain

conditions. Visual alarm signals should

be considered to complement alarm

sounders where there is a high level of

noise or the occupants may be hearing-

impaired.

Stage 4. Site Alarm Sounders

Conversationat 1m

Thresholdof Pain

Hammeringon Steel

HeavyMachine

Noise

BoilerFactory Noise

Punch Press

Room Noise

LightMachine

Noise

Heavy AssemblyRoom Noise

Heavy StreetNoise

Dispatch RoomNoise

Light AssemblyRoom Noise

Stock RoomNoise

Average OfficeNoise

Light StreetNoise

Typical ambient noise levels dB (A)

Whisper at1m

40 50 60 70 80 90 100 110 120 130 14030

dB(A)


11/32

Sound output All sounders in a building should be of a

similar type, do not mix electronic

sounders and bells.

The sound level will reduce by 6dB every

time the distance from the sounder is

doubled. Sound levels are normally

quoted on-axis, ie. directly in-line with

the middle of the sounder.

This is normally the loudest position.

In order to assess the sound level at any

particular point it is necessary to allow

for the distance from the sounder AND

the angle off-axis.

Sounders should produce:

Minimum sound level of 65 dB or

at least 5 dB greater than any

background noise that is likely to

persist for more than 30 seconds 75 dB is required at the bedhead

of a sleeping person

Note: The sound level near the control

panel should not be so high that a

telephone cannot be used to summon

help from the fire brigade.

Attenuation

Fire alarm sounders may often be heard

in adjacent rooms but the sound level will be attenuated by any door.

Typical attenuation figures are:

20 dB by an internal door

30 dB by a fire door

It is also important to consider the

room’s use. Are there any obstacles

(including furniture) to the sound, and

how many people will be present in theroom? Both people and furnishings will

attenuate the sound level.

Stage 4. Site Alarm Sounders (cont).


9

Design Tips!1. Use sensor sounders in small rooms

where the sound level has been

attenuated by door partitioning

(32000/Vigilon systems only).

2. Always site sounders in

toilets and bedrooms.

3. “Back-to-back” sounders wherever

possible to reduce wiring costs.

Sensor Sounder in a small office.

100dB(1m)

85dB(1m)


12/32


10

It is now possible to obtain bothconventional and analogue addressable

control panels to suit a wide variety of

building sizes and types.

There should be a plan of the building,

showing at very least the entrances, to be

placed on or near the control equipment.

If there are several entrances,

consideration should be given to the

provision of a repeat panel at eachentrance.

When selecting the control equipment

the current consumption of both

detection circuits and alarm circuits must

be considered, this will be found in the

relevant product literature.

Many control and indicating panels

include an integral power supply unit but

in the larger systems it may be

necessary to provide an external unit

either in place of or in addition to the

internal unit. The need for extra

standby power can be determined from

the total current consumption of the

system and the specification of the

supply.

Standby PeriodIn the event of a mains failure, the

minimum standby period is 24 hours in

normal conditions followed by 30

minutes at full alarm load. In special

circumstances, such as the availability of

a standby generator, these periods can be

reduced.

When a building is unoccupied for

significant periods, the normalcondition standby period should be

extended to 24 hours longer than the

period of non-occupation. For example,if a building is unoccupied from 6.00 p.m.

Friday to 8.00 a.m. Monday, the fire

system should have a standby period of

86 hours normal condition, followed by

an alarm period of 30 minutes.

Siting control and indicating equip-

ment

Control and indicating equipment should

be sited:

In an area of low fire risk.

On the ground floor in the vicinity of

an entrance used by the fire brigade.

In an area common to all building

users.

Where automatic detectors are in use,

the control equipment area must be

protected.

Where ambient light levels are such

that visual indications can be clearly

seen.

With a first alarm sounder sited

adjacent.

Stage 5. Select Control & Indicating Equipment

Design Tip! For minimum standby period it is

important to consider the worst case.

For instance, is there cover for

weekends and bank holidays?

Most reputable manufacturers design

control panels with 48 hour standby,

however 72 hours or longer may be

required.


13/32

Door Retainers and RelaysDoor retainers will hold doors open

during normal conditions but allow them

to close in the event of fire.

A manually operated switch may also be

included if required.

The mechanism comprises a powerful

electromagnet and a door plate.

The electromagnet may be wall or floor

mounted.Batteries

Most internal and external power supply

units will normally be supplied with (or

have provision for) sealed lead-acid cells

as they need a minimum of

maintenance.

System Interfaces

While a fire detection and alarm systemmust be capable of operating in isolation,

other building systems may need to

receive a signal when a fire alarm is

activated - or may need to activate the

fire alarm system when they are operated.

For example, a fire detection system may

need to shut down the normal ventilation

system or to activate a fixed extinguishing

system.Conversely, if a fixed extinguishing

system is manually operated or a gas

detection system is activated, the fire

alarms may need to be sounded.

In such cases, a system interface is

needed, which may be a simple relay for

a conventional system or a number of

addressable inputs and outputs for an

addressable system.

Power Supply UnitsGent control and indicating panels

include a stand-by power supply unit

complete with batteries. However, in

larger systems the current requirements

are often very different and therefore a

separate power supply unit, external to

the control panel, may be needed.

Manned Centre Links

Where the system includes the need forrapid fire service attendance an automatic

link to a permanently staffed centre can

be provided. There are several methods

available and before selecting one it is

recommended that the matter be

discussed with the Gent Technical

Hotline on 0800 064 3344

Fixed Extinguishing Systems Where the protection of property is

important and a rapid attendance cannot

be guaranteed, the provision of a fixed

extinguishing system should be considered.

Gent can supply a range of gaseous

extinguishing systems which are ideal

when a liquid extinguishant, such as

water, might itself cause extensive damage.

Stage 5. Select Control & Indicating Equipment (cont.)


11


14/32


12

ZoningFor several reasons a building must be

split into a number of fire detection and

alarm zones.

The prime purpose of zoning is to

identify the location of a fire or fault:

The following criteria govern the

number and size of zones:

The floor area of a single zone should

not exceed 2000m2.

No person in a zone should have to

travel more than 30m to visually

determine the position of a fire.

The zone should not cover more

than one storey unless the total

building area is less than 300m2.

Stairwells, lift shafts and flue-like

openings should be treated asseparate zones.

It is permissible for a zone to cover a

whole number of fire compartments,

or for a fire compartment to contain a

whole number of zones, but a zone

cannot extend over parts of two or

more fire compartments.

For multiple-occupancy buildings the

occupancy boundaries shouldcoincide with zone boundaries.

If there is an area of special fire risk,

consideration should be given to

setting up a separate zone for rapid

identification of a fire in that risk

area.

Notes:1. A fire compartment is an area

bordered by a fire-resisting structure

usually at least 30 minutes resistance.

2. Zone limits can be relaxed only in

certain Type M systems.

3. To avoid misleading indication of the

position of a fire, consideration

should be given to the separate

zoning of manual call points,particularly those on staircase

landings. This can be achieved by

indicating automatic detectors and

manual call points separately.

Stage 6. Zoning

Design Tip! Remote indicator lamps can be used

to reduce the need for small complex

zones.

They are also useful for voids and

locked cupboards.


15/32

Stage 2. Site Manual Call Points

Stage 3. Site Fire Detectors

E X A M P L E S

13

S

SS

S S

S

S

S S S

SSS

S

H

H

H

H

BB

S

H

On escape routes and exits tothe open air.

So that no one has to travelmore than 30m to reach one.

On floor landings and staircases.

Area covered by smoke detector= 100m2 max.

Area covered by heat detector= 50m2 max.

Distance between smokedetectors = 15m max.

Distance between heat detectors= 10.6m max.

Check special rules for corridorsless than 5m wide.

Maximum beam length =100m.

Cover toilets and stairways.

Optical smoke detector

Heat detector

Beam detector

S

H

> 1 7 .5 m

approx 550m2

Stores

Assembly Area

Warehouse

BoilerRoom

Office

Reception

Canteen

OfficeWC WC WC

WC

Stores

Assembly Area

Warehouse

BoilerRoom

Office

Reception

Canteen

OfficeWC WC WC

WC

Manual Call Point

B

Travel distances >30m require a call point.


16/32

E X A M P L E S

14

Stage 4. Site Alarm Sounders

Stage 6. Zoning

Minimum 65 dB required or 5dBgreater than background noise.

75 dB required at bedheads.

Sound level reduces by 6 dB forevery time the distance fromthe sounder is doubled ie.100 dB - 1m94 dB - 2m88 dB - 4m82 dB - 8m76 dB - 16m

Sound level is attenuated by30dB for fire doors and 20 dBfor internal doors.

Stage 5. Site ControlEquipment

For ease of access by fire brigade.

Floor areas should not exceed2000m2.

Stores

Assembly Area

Warehouse

BoilerRoom

Office

Reception

Canteen

OfficeWC WC WC

WC

Stores

Assembly Area

Warehouse

BoilerRoom

Office

Reception

Canteen

Office

WC WC WC

WC

Remote LEDs.

Zone 1

Zone 2

Zone 3

Zone 4

Fire panel.


17/32

Many false alarms result from causes that were not considered at design or

installation stages and could otherwise

have been avoided. Common causes of

false alarms include:

Electrical or mechanical faults,

perhaps caused by vibration,

impact or corrosion.

Heat, flames or smoke

generated from industrialprocesses or cooking.

Fumes from engine or

machine exhausts.

High air velocities caused

by strong draughts or air

conditioning.

Work being carried out in

the protected area withoutthe necessary precautions

being taken.

Servicing or testing

equipment without prior

notification to those likely

to receive indication.

Electrical transients or radio

interference.

Inadequate servicing.

The build-up of dust or dirt or the

presence of insects within a detector.

Changes, including change of use

within the building.

Accidental or malicious operation.

Fire detection and alarm equipment isdesigned to minimise false alarms,

particularly with the introduction of

advanced, analogue systems. However,

even very sophisticated equipment

cannot compensate for a badly designed

system or a poor installation.

It is therefore vital that potential causes

of false alarms are considered and the

risks minimised at the design stage.

F A L S E A L A R M S

15


18/32

I N S T A L L A T I O N O F C A B L E S

16

Since every site is different, it is only possible to give general guidance, refer to

BS 5839 for more details.

A fire alarm system depends on its

wiring. There are 2 group classes of

cable:

Cables NOT required to operate

after a fire has been detected e.g.

detectors and manual call points

(group 1). Cables required to operate during a

fire, e.g. power supplies and sounders

(group 2).

While mineral insulated cables are

preferable for all fire alarm applications

the following cables can be used for the

two groups:

Group 11. MICC to BS 6207: Part 1 (with or

without sheath)

2. Cables complying with BS 6387categories AWX, SWX, A or S.

3. PVC - insulated to BS 6004 sheathedor non-sheathed with mechanicalprotection.

4. Rubber insulated to BS 6007

5. PVC single type BK, BR and BU toBS 6231

6. PVC insulated SWA to BS 6346

7. Cross-linked polyethylene or hardethylene-propylene rubber insulatedSWA to BS 5467

8. Polyethylene insulated PVC sheathedcoaxial cable to the dimensional

requirements of BS 2316: Part 3 but with a minimum of 16 strands /0.2mm diameter central conductor.

9. Cables designed for the detection ofheat must be configured to initiatethe alarm system should a fire occuralong the cable.

Group 2

Cables 1 or 2 from group 1.

Cables 3 to 9 from group 1, providing

that they are protected either by burying

them in a wall and covering them with

12mm of plaster or equivalent, orprotecting them from a significant fire

risk by shielding them with a wall,

partition or floor having a minimum

demonstrable 30 minutes fire resistance.

These requirements may in some cases

be reduced when included in areas of low

fire risk or when covered by an automatic

extinguishing system.

Certain cables may also need mechanical

protection against impact, abrasion or

rodent attack. As a guide, cables 1, 6 and

7 will not need further protection but all

others may in risk circumstances.

BS 5839: Part 1 gives full details.

Other types of cables can be used

provided that their suitability can be

demonstrated.Conductors carrying fire alarm power or

signals should be separated from

conductors used for other systems.

Wiring


19/32

Cables should be installed in accordance

with the good practices recommended in

the 16th Edition of the IEE Wiring

Regulations (BS 7671).

Other than the segregation of cables the

regulations exclude fire alarms if they are

fed from a safety source. In effect this

applies to extra low voltage systems,

which include systems in general use for

fire alarm circuits. All cables and apparatus directly

connected to a public supply 240V a.c.

(low voltage) such as supplies to

indicators, power supplies and mains

operated door holders must comply with

the 16th Edition in respect of the

installation of cables and the provision of

isolation and switching.

Connection to mains supply should be via an isolating switch fuse reserved

solely for the purpose. Its cover must be

painted red and labelled FIRE ALARM -

DO NOT SWITCH OFF.

If required a separate RCCB should be

used for fire alarm systems. Fire alarm

cables are defined as ‘Category 3 Circuit’.

Cables of Category 1 Circuits (low voltage and connected directly to a mains

supply) must not be drawn into the same

conduit, duct or ducting as Category 3

(fire alarm circuits).

Where Category 3 Circuits are installed

in a channel of trunking containing

circuits of any other category, these

circuits must be segregated from the

latter by continuous partitions, such thatthe integrity of the Category 3 (fire alarm

circuits) is not reduced.

In effect these regulations mean that

unless MICC is used, fire alarm cable

circuits must never be mixed with any

other circuits; neither should they be

mixed with any other circuits in a multi-

core cable.

Conductor size should take voltage drop

into account. In any case conductors

should have a cross-sectional area of not

less than 1mm2

or if stranded of not lessthan 0.5mm2.

Where possible cables should be routed

through areas of low fire risk.

Cables installed in damp, corrosive or

underground locations should be PVC

sheathed. Where there is a risk of

mechanical damage, cables should be

protected accordingly.

Cables in cavities or voids should be

separated from other cables by 300mm

unless enclosed in a conduit, ducting or

trunking.

I N S T A L L A T I O N O F C A B L E S

17


20/32

P A N E L I N S T A L L A T I O N

18

Dedicatedmains

cableentry points

Panel size395mm wide x 274mm high x 87mm deep

89mm 89mm

1 9 m m

1 9 7 m m

111mm4-off earth points

How to knock-ina cable entry point

Knock here to openthe entry point

Red

Battery connectionsBlack

Fixing pointsfor theelectronicassembly

Electronic assembly

Panel Backbox

Transformercables

to electronicassembly

Earth connectionto the electronic

assembly

NB: The following installation method

is based on the Xenex panel.

Panel Fixing

a) Remove panel from its packing, but

retain the carton for storage of spare

parts and loose items.

b) Remove the top and bottom inner plates.

c) Check the spares parts supplied with

those listed in installation manual. If

replacement parts are required at anytime, only spares that are of the same

specification should be used.

d) Remove the transformer and earth

connections from the electronic

assembly, and then remove the

electronic assembly from the panel.Store the electronic assembly in a safeplace until required.

e) Remove the appropriate knock-in onthe panel case for cable entry.

f) Hold the panel on the wall in thedesired mounting position and markthe positions of the fixing holes.

g) Secure the panel to the wall using

suitable fixing such that adequatesupport is provided to the controlpanel assembly. A top centre keyholefixing is provided on the case to allow the panel to be hooked whilst thebottom two fixing points are located.

Panel fixing


21/32


19

h) Connect the mains supply cable to

the panel .The cable:

must be through one of the dedicated

cable entry into the panel.

via an unswitched fused spur unit,

rated 5A for the 1 & 2 Zone Control

and Repeat panels and 7A for 4 & 8

Zone panels.

The fused spur isolator cover should be

red and marked:

FIRE ALARM - DO NOT SWITCH

OFF

The fused spur units must be fed from a

dedicated switch or protective device at

the local mains supply distribution

board.

i) Wire the system. With the exception

of the mains cable, all cables should

remain unconnected at the panel

leaving 300mm tail. Mark each core

identifying its final point of connection.

4-off earth points

13-back13-topcable entry points

Gland

Earth

drain

Cable

Cable termination

Panel backboxElectronic assembly

Panel Fixing (Wiring)

Cable entry &earth points

CAUTION: DO NOT undertake high

voltage insulation tests WITH THE

CABLES CONNECTED to their

terminals. Such a test may damage the

electronic circuitry in the system equipment.

j) Refit the electronic assembly into the

panel and connect the transformer and

earth cables previously removed.

Note: Each terminal in a panel will accept a

maximum conductor size of 2.5mm

square.

Note: The installation of all out standing

parts are usually carried out during

Commissioning of the System.

Store all spare parts and loose components

including the batteries inside the panel

carton and keep in a safe place until

required.


22/32


20

For the wiring of:

Length per circuit Type of circuit Recommended cables, alsosee BS5839:Part 1 guidance

2m Mains power supply cord see power supply cord

1Km Zone circuit

1km Sounders circuit

100m Auxiliary circuit

l00m Common fire and fault circuit

l00m Class change circuit

500m Repeat panel link Belden type screened 2-coretwisted pair

The guidance of BS5839: Part 1:1988

should be followed. The use of cables

such as (MICC or Belden) are

recommended.

Generally available electrical installationcable may be used, providing the cable is:

to BS6387

with no more than 2 - cores

each core having no less than 1.5mm2

cross section area

with an inherent or through metal

conduit screen for earth continuity in

order to produce electrical productionand screening

having protection from heat and

mechanical damage

Power supply cord

This should be a 3-core cord having a

rated current of:

5A with a nominal core cross sectional

area of 0.75mm2

provided the lengthof the cord does not exceed 2m

Cables

Power Supply

See BS5839: Part 1 guidance

Standby Supply

With the recommended battery and zone

loading the control panel will provide a

standby supply under mains failureconditions, for a period of 72 hours

followed by 30 minutes of alarm load.

24V Supply

The power supply terminals ‘24 + and 0’

may drive external ancillary equipment

and is designed to be used in conjunction

with auxiliary contacts and common fire

and fault outputs.

Note: The use of the 24V supply will

affect the panel standby capability.


23/32

C H E C K L I S T

21

Notes to the Installer - Checks

The power-up and commissioning isdone by the servicing organisation.

The wires between the termination

point and terminals should be short

and straight as possible.

The cables of the fire detection and

alarm system and other systems

should usually be separated by at least

160mm, unless dedicated conduit or

ducting is used.

Do not use any part of building

structure for earthing.

The cable length between the Repeat

LED unit and respective fire detector

where used, should not exceed l0m

Cable Glands should be used on the

equipment for the mains supply cable.

Unused knockouts on productenclosure that have been removed,

should not be left open.

Requirements

It is recommended that the installer

follow the general requirements of:

BS5839:Part 1:1988, which is the code

of practice relating to the fire

detection and alarm Systems forbuildings.

the relevant parts of the BS 7671

Requirements for Electrical

Installation Institute of Electrical

Engineers Wiring Regulations l6th

edition

Second fix installation

To prevent the possibility of damage or

dirt.degrading the performance orappearance of the System Products,

the installation of second fix items should

be delayed until all major building work

in the area is complete.

Fixtures and fittings

It is the installers responsibility to

provide:

adequate fixtures and fittings for the

type of construction surface onto

which a product is to be installed.

as an aid to this decision, the weightand overall size of each full assembly

together with implications on cable

entries and routing should be taken

into consideration.

Note: All these procedures assume that

the cable, gland, steel box (BESA box)

and other related accessories are provided

by the installer

As Fitted wiring drawings

The installer should acquire:

site specific information from the

interested parties, for details on the

location of products for installation

the acquired information together

with the relevant standards should be

used to assist the work.

Earth continuity

To maintain earth continuity, the cable

screen must be continued through each

system device, whether the earth is

connected to a device or not.


24/32

S Y S T E M S C H E M A T I C

22

E N

D O F

L I N

E

R E S I S T O R

1 0 K

O h m s

A L A R M

S O U N D E R C I R C U I T

I n i t i a t i n g c o n t a c t s t o

a u x i l i a r y e q u i p m

e n t ,

s u c h a s m a n n e d

c e n t r e l i n k

a n d m a g e n e t i c

d o o r h o l d e r s

T o

d e d i c a t e d

m

a i n s i s o l a t i n g

p r o t e c t i o n u n i t

N

E

L

M A I N S

T E R M I N A L

N C

T A

T B

E

N C N 0 N 0

A u x i l i a r y

c o n t a c t s

T o

T r a n s f o r m e r ( s )

B

o a r d

Z o n e

S o u n d e r

Z o n e

S o u n d e r

T h e r e c a n b e u p t o 8

F i r e d e t e c t i o n ( z o n e ) c i r c u i t

a n d s o u n d e r c i r c u i t d e p e n d i n g

o

n t h e p a n e l s i z e

C l a s s

c h a n g e

R e p e a t

p a n e l

P u s h b u t t o n s w i t c h

f o r c l a s s c h a n g e a p p l i c a t i o n

E N D O F

L I N E

C A P A C I T O R

U N I T

R E D

B L A C K

F I R E D E T E C T I O N

( Z O N E ) C I R C U I T

F I R E

D E T E C T O R

M A N U A L

C A L L

P O

I N T

A l a r m s o u n d e r s

b e p o l a r i s e d

.

m u s t

: S p u r w i r i n g i s n o t p e r m i t t e d o f f f i r e d e t e c t i o n

c i r c u i t s .

N O T E

a n d a l a r m s

o u n d e r

F i r e a l a r m c o n t r o l p a n e l

C C 1

C C 1

2 4 +

2 4 V + s u p p l y

0 V s u p p l y

C o m m o n f a u l t

C o m m o n f i r e

C F T

C F R

R +

R -

0

Z 1 +

Z n +

Z 1 -

Z n -

S 1 +

S n +

S 1 -

S n -


25/32

F I R E D E T E C T I O N C I R C U I T S

23

Each zone circuit can have up to 2mA

load. An end-of-line

capacitor unit is required for zone

circuit monitoring, which must be fitted

after the last detector or manual call

point on the circuit.

All manual call points used must

have a 470 ohms series resistor.

Note: If a Beam detector is used, then it

must be powered from an independentsupply.

Zone circuit connections

END OF

LINE

CAPACITOR

UNIT Unused Zone circuits mustbe terminated with anend-of-line Capacitor unitor bipolar capacitor

RED

BLACK

FIRE DETECTION (ZONE) CIRCUIT

FIREDETECT OR

A fire detector headmay be fitted

to a diode-base forcontinuity when a detector

head is removedand there can be

a maximum of up to20 diode-basesper zone circuit

MANUALCALLPOINT

NOTE: Spur wiring is not permittedoff zone circuits.

ZoneCircuit

ZoneCircuit

Contol panel

Z1+ Z2+Z1- Z2-

BLACK RED

Where a zone circuit is not being used,

the end-of-line capacitor unit must be

fitted across its terminals

in the panel.

24


26/32

F I R E D E T E C T I O N C I R C U I T S

24

Sounder circuit that isnot used is terminatedwith an end-of line resistor

END OF

LINERESISTOR

ALARM SOUNDER CIRCUIT

Sounder Sounder

Control panel

Alarm sounders must bepolarised and suppressed.

NOTE: Spur wiring is not permittedoff alarm sounder circuits.

S1+ Sn+S1- Sn-

Alarm sounder connections

Note: All sounder circuits (sectors) will

always operate together in the event of a

fire condition.

To comply with the requirements of BS

5839: Part 1:1988, a minimum of two

alarm sounder circuits should be used on

all installations.

1 & 2 Zone 4 & 8 Zone

Panel Panel

1A maximum 1.5A maximum Alarm sounder Alarm sounder

load per panel load per panel

The load must be shared between the

sounder circuits.

The alarm sounder circuits are regularly

pulse monitored for failure. It is important

that the last alarm sounder is fitted with

an end-of-line resistor.

Where a sounder circuit is not being used,the end-of-line resistor must be fitted

across its terminals in the control panel.

25


27/32

A U X I L I A R Y C O N T A C T S

25

These are normally

open (NO) and

normally closed (NC)

contacts that switch

over when the panel

goes into a fire

condition.

The contacts are rated

at 24V d.c. 1A for a

resistive load and

should not be used

to switch voltages in

excess of 50V.

The auxiliary circuits

should be powered

from an independent

power supply.

Class Change A pair of unmonitored

terminals allow only

the system alarm

sounders to be actuated

from a remote position.

It is considered that

the major use for

these will be for class

change functions inschools and colleges.

Note:There is no

indication at the panel

of class change push

button operation.

Initiating contacts toauxiliary equipment such as:Manned centre linkMagnetic door holders

Contacts change over occurwith a fire condition

N C

N C

N 0

N 0

Auxiliarycontacts

Control panel

100m maximumcable distance

Class change

100m maximumCable distance

Push button switch or relay pulsedat 1 second interval (maximum)for class change application

CC1 Cc2

Control panel

Auxiliary contact circuit

Class change circuit

26


28/32

A U X I L I A R Y C O N T A C T S

26

Common Fire and

Fault

The common fault

output is a normally

closed electronic

switch, which opens

with a fault condition,

this is for a fail safe

operation.

The common fireoutput is normally

open electronic switch

that closes with a fire

condition.

Note: Each electronic

switch has an in-line

1K ohms resistor.

The +24V & 0V is a

power supply for use with auxiliary contacts,

common fire and

common fault circuits.

Repeat Panel

There can be up to 6

repeat panels series

connected from the

control panel.

A repeat panelduplicates fire and

fault indications

together with system

controls.

CommonFire

Relay

CommonFaultRelay

CFT

CFR

Fire fault relay unit Panel outputs

24V + Supply

Common Fault

Common Fire

24+

CFR

CFT

R+R-

Control panel Repeat panel 1

Screen must beconnected to panel

Screen linked

R+R-

Fire fault & 24V outputs

Control to repeat panel connections

27


29/32

C O M M I S S I O N I N G

27

The total system should be tested in

accordance with the commissioning

requirements of BS5839:Part 1:1988 or

other standard specified by the system

purchaser.

Note: The commissioning procedures

assume that the system has been installed

as per manufacturers instructions.

System checks

Acquire as fitted drawings

Check the system has been installed

to the project requirements.

If appropriate, action the installer to

carry out changes to the system.

+

-

Control panel

Connection for 12V 2.1Ah BatteriesFor 1, 2 and 4 zone panels + repeat panel

a) Open thelower outer cover

b) Remove thelower inner plate

Instructions + Zone designation

c) Fit the batteries andconnect the battery cables

+ -

Connection for 12V 2.8Ah BatteriesFor 8 zone panels

+

-

+-

Zones

FIRE

Faults

System

Power

Earth

Sounder

DisabledSoundAlarms

SilenceAlarms

1 2 3

4 5 6

7 8 9

0 v

Test

Access/Function

1 2 3 4 5 6 7 8

CancelBuzzer

ResetSystem

Power

ShiftDisplay

Day/Night

Initial power up

a) Disconnect cables to terminals of zone,

sounder, class change, auxiliary,

common fire and fault circuits. Ensure

each cable is marked for reconnection

to respective terminals later.

b) Connect end-of-line units to zones and

sounder circuits for initial power up.

c) Check mains connection and switch on

the mains power to the control panel.d) Now connect the battery supply, see

below.

e) Check the panel provides a normal

healthy indication, with the green light

lit.

Battery installation

28


30/32

C O M M I S S I O N I N G

28

Panel terminals

Zones

FIRE

Faults

System

Power

Earth

Sounder

DisabledSoundAlarms

SilenceAlarms

1 2 3

4 5 6

7 8 9

0 v

Test

Access /Function

1 2 3 4 5 6 7 8

CancelBuzzer

ResetSystem

C N5 C N6 C N7 C N8 C N9 C N1 0 C N 11 C N1 2 C N 13 C N14 C N1 5 C N1 6 C N 17 C N18 C N1 9 C N2 0 C N2 1 C N2 2 C N2 3 C N2 4 C N2 5 C N26 C N27 C N 2 8CN 29 C N3 0

F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11SEC TOR 1 S EC TOR 2 S ECTOR 3 SEC TO R 4 S EC TO R5 S EC TOR6 SECTO R7 SECTO R 8BATTERIES

T1 A T1 B T 2BT2AE NC N C NO NO Z 1+ Z 1- S1-S 1+ Z 2+ Z 2 - S 2-S2+ Z3+ Z 3 - S 3-S3+ Z4-Z 4+ S 4+ S 4- Z 5 + Z 5- S5-S 5+ Z 6+ Z 6 - S 6-S 6+ Z 7+ Z 7- S7-S 7+ Z 8-Z8+ S8+ S 8- C C 1 CC 2 24 + 0C FT C F R R + R -

PO WER 1 PO WER2

Fuses

T1AT1B

E

CFR24+CFT

0CC1CC2

R+ R-

NCNC NO

NO

Zn+Zn-

To Zone and SounderCircuits, where `n' signifies

circuit number 1 to 8Sn-

Sn+Auxiliary contacts1A at 24Vdc resistive

To transformer

Softwareversion

label

P1

P3 to P6

P7

Class change,Common fault,

Common FireRepeat panel

Panel

Power

ShiftDisplay

N E L

The terminal blocksare not fitted on the

shadedRepeat panel.

Day/Night

Zone circuit tests

a) Transfer the end-of-line capacitor unit

to the last device (detector or manual

call point) on a zone circuit.

b) Connect the zone cable to the zone

circuit terminals.

c) Carry out zone open circuit and short

circuit tests and check appropriate

indications are given.

d) Repeat the above for other zonecircuits.

Sounder circuit tests

a) Transfer the end-of-line resistor unit to

the last device on a sounder circuit.

b) Connect the sounder circuit cable to

the sounder circuit terminals.

c) Carry out sounder open and short

circuit tests and check appropriate

indications are given.

d) Repeat the above for other sounder

circuits.

29


31/32

The fire detection and alarm system should

be tested to ensure it operates to meet thestandards and project requirements.

Configuration

The control and repeat panels are factory

set to requirements of EN54 Parts 2 and 4.

The operation of the control and repeat

panels and the system may be

re-configured to site specific needs.

CAUTION: Any special configurationsmay cause the system and equipment to

operate outside the requirements of

European standards.

Test mode A or B operation

To facilitate tests on the fire detection

and alarm system the control panel can

be set to operate in a test mode.

With Test mode A or B active: a triggered

manual call point or fire detector in thetest zone will give:

Test A Test B

Fire indication System alarmfor 10 seconds sounds for the firstduration 2 seconds and at thefollowed by a same time a Firesystem reset indication is

given for l0 seconds

duration followedby a system reset

Note: A detector that is still full of

smoke or heat will retrigger into a fire

condition until the smoke or heat in the

area is cleared.

Repeat panel configuration

Each repeat panel connected to the

system is required to be given an address

at both the control and repeat panels, seePanel configuration section.

I N S T A L L E D S Y S T E M T E S T S

29

Sound level test

Sound level tests should be conducted to

standard requirements and to customer

satisfaction.

Other equipment tests

Where external equipment is connected to

the control panel using auxiliary, common

fire and fault terminals, then these must

be tested to project requirements.

Log book Fill in system details on the first three

pages of the log book.

On completion

Ensure the persons responsible for the

system are made aware of:

system operation

access codes to controls

basic controls

their responsibility

and the need to log system events in

the log book.

30


32/32

T R O U B L E S H O O T I N G

30

1 Zone fault light on panel, check:

a) incorrect wiring polarity.

b) open circuit on wiring.

c) end of line device not fitted on

open circuit.

If fault does not clear, remove end of line

devices from end of each circuit in turn,

and fit across terminals of panel. If fault

then clears this proves fault is external to

panel. If fault persists, call Gent Service

Engineer.

2. Bell(s) (or Sounders) do not

operate, check:

a) Incorrect polarity.

b) faulty sounder.

If a) rectify - if b) call Engineer.

3. Sounder fault on panel, check:

1a and 1b as above and also for existence

of unpolarised bell on alarm circuit. Also

transfer end of line device to terminals

on panel to determine whether fault

internal or external as 1.

4. Supply lamps (green) not

illuminated, check:

Mains supply to control or charger unit,

if batteries are connected, buzzer shouldbe sounding.

5. Power fault on panel, check:

If green lights are on, buzzer should be

sounding.

a) Battery connections.

b) Panel fuses.

c) 24V Output.

If fault persists after these checks, call

Service Engineer.

Alarm condition on panel when

powered up, check:

for broken glass on call points.

for short circuit on trigger circuits. for

detector in alarm state (LED on).

If control unit can still not be reset call

Gent Engineer

SERVICE HOTLINE

0500 334455

Documents

Installer s Handbook