Gent by Honeywell- A6 Installers Guide

8/10/2019 Gent by Honeywell- A6 Installers Guide

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The Gent 24 nationwide network of approved system integrators consists of 60specialist companies who can supply Gent by Honeywell equipment and carry outdesign, installation, commissioning and maintenance operations to the higheststandards of workmanship.



4 Introduction

4 Legal elements

3 Regulatory Reform Fire Safety Order 2005

3Di bilit Di i i ti A t 1995 t III (O t 2004)

This Pocket Design & Installation booklet provides a simple guide for the provision of a fire

detection and alarm system in accordance with the recommendations detailed within the British

Standard Code of Practice BS 5839-1:2002

The handbook is designed to act as an aide-memoire and there is no substitute for reading the

full standard, copies of which can be obtained from:

British Standards Institute 389 Chiswick High Road, Chiswick, London W4 4AL

Tel: 020 8996 9001 Web: www.bsi-global .com Email: [email protected]

F I R E D E T E C T I O N S Y S T E M S

Contents

1




3

Any design should be prepared by a competent individual/organisation, who has consulted all interested

parties and created a set of drawings, a specification, a cause & effect or fire plan, a list of Variations andcompleted a G1 Design certificate, detailed within BS 5839-1:2002.

If designs are undertaken without this research being carried out, the fire detection system is unlikely tocomply with the legal requirements. This could result in prosecution of the parties involved, particularlythose within the supply chain as well as the Owner/Occupier.

WARNING: Anyone who takes on the responsibility for design will do so at their own risk and designliability insurance is advisable.

The Designer’s responsibilities:

3 Agree the level of protection or category with Owner/Occupier

3 Justify any Variations and document reasons

3 Detail the detection & alarm zones

3 Prepare specification and drawings including;

3 Siti f l ll i t

System Design




5

Determine the System Categoryor level of protection

Systems designed for Protectionof Property only, fall into two

classifications P1 or P2.

The objective of a Category P1 is to

provide the earliest possible warning

of a fire to minimise the time

between ignition and the arrival of

the fire fighters.

P1 is designed to protect the whole

building whilst P2 is installed in

defined parts of the building only,

hi h h t di

L5

M




7

Detection and Alarm Zones

Generally a building is broken down into smaller compartments to enable the fire fighters tolocate the fire as quickly as possible.

Even if the system is addressable it is still considered beneficial to have a separate ‘at a glance’indication of the location of the fire.

These compartments of a building are called detection zones, which need to comply with thefollowing criteria.

Detection Zones

3 A detection zone should cover no more than 1 storey, unless total floor area is less than

300m2. Voids in the same fire compartment should be included in the same floor zone.

The maximum floor area of a zone should not be greater than 2,000m2, except for some large

open plan areas that incorporate manual call points only, which can be extended to 10,000m2.

Th i h di f

Design Stage 2




9

Manual Call Point

Route of travel 45m max(defined)

Route of travel 30m max(undefined)




11

Smoke sensors complying to BS EN54-7

Traditionally, ‘point’ type smoke sensors have fallen into two main categories, optical or ionisation.

Due to new European Directives for the storage and transport of radioactive sources, ionisationsensors are becoming less favourable and are being replaced by multi-sensors that utilise single or dualoptical chambers that are also combined with heat and/or carbon monoxide sensing elements.

This creates a whole range of sensors that are suitable for detecting different types of fires and yetignore signals that previously have led to false alarms such as white dust or steam particles.

The table below shows the various ‘states’ of these smoke sensor options. This should be readin conjunction with the attached application/risk charts to ensure the correct sensor is used fora particular location.

S-QUAD SINGLE AND DUAL OPTICAL HEAT MULTI-SENSOR RANGE

SENSOR STATE Description of State set up

OHeat & O2

Heat 0 Medium Optical + A1 Heat*2

l




13

SMOKE detector under pitched roofs

FOR LESS THAN 600mm TREAT AS FLAT CEILING

UP TO600mm

DEEPERTHAN

600mm




15

Ceilings with multiple joists

PERMITTED SPACINGDETAILED IN TABLEBELOW

RATIO BETWEENCEILING HEIGHTSvs BEAM DEPTH &

MAXIMUM SPACING‘M’

M




17

Ceilings with other obstructions or Air Handling units etc

AT LEAST1m FROM

AN AIRHANDLING

UNIT

FREE500mmSPACEBELOW

DETECTOR

STORAGERACKS



Siting of BEAM detectors

ONE BEAM DETECTOR COVERS 17.5m USING EXTRA %ALLOWED DUE TO ANGLE OF ROOF


19

m

1.25m

600mm25º




21

Audible alarm levels within buildings are generally accepted as 65dB(A) throughout. However,the new standard does accept that in certain locations this can be as low as 60dB(A). This allowssome degree of flexibility, although in general the majority of a site must achieve 65dB(A) or

greater to be compliant.

The drawing below illustrates the areas where 60dB(A)is permitted

656565

65

6565

65

6560

60

60

60

65

65

ENCLOSURE OFLESS THAN 60sqm

MINIMUM OF60dB(A)

AREAS OF LESS THAN1m2 OF HABITABLESPACENO MINIMUM

SPECIFIC POINT OFLIMITED EXTENT MAY

BE 60dB(A)

SHADED AREA 500mmFROM BOUNDARY




23

Control equipment & power supplies

The Control panel itself should comply to EN54-2 and any power supply used should complyto EN54-4. Today the majority of Gent fire control panels incorporate their own battery andcharger and as long as the guidelines for loading these systems are complied with, the batteryshould be sufficient to maintain the system for a period of 24 hours with half an hour alarmload thereafter.

It is however recommended that a battery load calculation is carried out to verify the standbyperiod provided by the capacity of the battery supplied.

Irrespective of the size or type of system the control panel should be sited with the followingpoints in mind;

3 In an area of relatively low fire risk

3 On the ground floor entrance which the fire fighters will use

3 In buildings of multiple occupancy, the panel should be sited within a communal area or if

Design Stage 6




25

STANDARD FIRE

RESISTING CABLE

GROUND

FLOOR

SIXTH

FLOOR

FIFTH

FLOOR

FOURTH

FLOOR

THIRD

FLOOR

SECOND

FLOOR

FIRST

FLOOR

Example of a networkedfire alarm in amulti-storey building,

ENHANCED FIRE

Example of a networkedfire alarm in amulti-storey building,

STANDARD FIRE

RESISTING CABLE




27

Inspection and testing of wiring

Prior to any equipment being connected, all installed cables should be subject to a 500V dc

insulation test.These tests should show an insulation value of at least 2Mohm between conductors and

between each conductor and screen or earth.

Earth continuity tests should be carried out on all mains supply circuits as well as an earth loop

impedance in accordance with BS 7671. It is important with the Vigilon system that all earth

leads or screen cables are terminated and connected through each device.

The maximum impedance of each loop or radial circuit should be recorded to ensure it meets the

manufacturers recommendations. In the case of Vigilon this is determined by not exceeding the

recommended maximum cable lengths which for loop circuits should not be greater than 1Km

and a maximum of 100metres for any radial circuit connected on a loop powered interface.



GENERAL APPLICATION FOR SENSOR PREFERREDOPTION OPTION 2 OPTION 3 Air extraction ducts Duct detectors Aspiration

Airport terminals Beams** state 0 O2H* state 0 Video Animal houses, stables, zoo’s etc EP heat state 0

Areas of High risk like Historic Houses Aspiration O2HCO* state 1 Radio detection Suggest ti Atria Beams** state 0 AspirationVertically Note use ‘

Battery re-charge rooms O2H* state 0 Flame

Bedroom O2H* state 0 O2H* state 8Bedroom with adjacent Bathroom O2H* state 8 O2HCO* state 0 O2HCO* state 9 Options d

see table

Bedroom with bath & or kitchen attached O2H* state 8 O2HCO* state 0 O2HCO* state 9 Options dinto bedro

Boiler room with coal or coke H* state 5 O2HCO* state 11 Boiler room clean with Gas/Oil/El ectrical source O2H* state 5 O2HCO* state 11

Cable duct ways Linear Heat Beams** state 0 Watch out Car park (enclosed) H* state 0 O2H* state 2 O2H* state 8

Changing rooms alongside showers etc O2HCO* state 9 H* state 0 Clean data processing room O2HCO* state 1 O2H* state 1 Aspiration Watch for

Cold rooms Aspiration Use heat state 0 but avoid fitting near open do

Corridors, stairwells or internal passageways O2H* state 0 Electrical switch or plant rooms O2HCO* state 0 O2H* state 0

Enclosures open to air EP Heat EP Flame

Flour Mills O2HCO* state 9 Flame detector Garage work areas H* state 0 O2HCO* state 9 O2H* state 2 Suggest t Kitchen large commercial H* state 6 O2HCO* state 11 Suggesttim

Kitchen small domestic O2H* state 2 H* state 13 Laundry room large, high ceiling Beams** state 0 O2HCO* state 9 Flame Consider l

Laundry room small, low ceiling O2HCO* state 9 H* state 13

Laundry Storage room O2HCO* state 9 H* state 0 Libraries O2HCO* state 0 Aspiration O2H* state 0

Normal office or working area O2H* state 0 Open high ceilings in Church’s or Cathedrals Beams** state 0 Flames Watch nu

Prison / secure accommodation O2HCO* state 2 O2HCO* state 9 Restaurant area O2H* state 0 H* state 0 Suggest ti

Retail shop High ceilings (e.g. B&Q) Beam state 0 Retail shop Normal ceiling height O2H* state 0 O2HCO* state 0

Room with gas fire O2H* state 0 O2HCO* state 0

Room with Open wood/coal fire O2H* state 2 H* state 0 Scientific Laboratories O2HCO* state 0 Wide varia

Spray booths - spray shops Flame H* state 0 Linear Heat Watch out Steam rooms, sauna or shower areas EP heat O2HCO* state 9

Store rooms O2HCO* state 0 Subject to Tunnels Flame Linear Heat

Warehouse Beams** state 0 O2H* state 0 Option 1 w Warehouse loading bay H* state 0 Flame O2H* state 0

X-ray or other high EMC areas Aspiration O2HCO* state 0 Ignore use


29

Documentation

On completion of commissioning and usertraining all documentation will have to becollected and handed to the client or theirrepresentative. This will include;

3 Design,InstallationandCommissioningcertificates G1, G2, & G3*

3 Cable and insulation resistance test records

3 “As fitted” drawings of the final installation,including cable run details

3 Product manuals and user instructions

3 System log book

3 A copy of the fire plan documentationagainst which the commissioning engineerprogrammed the system

3 The designer’s specification and a written listof agreed Variations

* For existing systems the G5 Verification Certificate couldreplace G1, G2 & G3.

Note* Versions may include Speech, Sound and strobe or mixture of all features. ** Beams state dependa

SENSOR APPLICATION GUIDE This guide is aimed at providing advice on the most suitable type of sensor fodepending on the particular application and if there are any doubts we suggest you consult one of our field sales a

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Documents

Gent by Honeywell- A6 Installers Guide