AS 2220 1 1989 emergency warning and intercommunication

AS 1851, Maintenance of fire protection equipment, Part 10: Emergency warning and intercommunication systems, specifies the periodic inspection and maintenance requirements to ensure con

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AS 2220.11989 Emergency warning and intercommunication systems in buildings

-Equipment design and manufacture

Licensed to LUU MINH LUAN on 25 Feb 2002

Australian Standard 

Emergency warning and intercommunication systems in buildings

Part 1: Equipment design and manufacture

of Standards Australia on 4 May 1989 and published on 11 September 1989.

The following interests are represented on Committee BD/56:

Association of Consulting Engineers, AustraliaAustralian Assembly of Fire AuthoritiesAustralian Fire Protection AssociationAustralian Uniform Building Regulations Coordinating CouncilBuilding Owners and Managers Association of AustraliaCommonwealth Fire Board

Department of Administrative Services—Construction GroupDepartment of Defence

Electrical Contractors Associations of AustraliaFire Protection Industry Association of AustraliaInsurance Council of Australia

Public Works Department, New South WalesPublic Works Department, Victoria

Safety Institute of AustraliaTelecom Australia

Review of Australian Standards To keep abreast of progress in industry, Australian Standards are subject

to periodic review and are kept up to date by the issue of amendments or new editions as necessary It is important therefore that Standards users ensure that they are in possession of the latest ed ition, and any amendments thereto.

Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian Standard’, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards.

Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed Notification of any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 85304.

Australian Standard 

Emergency warning and intercommunication systems in buildings

Part 1: Equipment design and manufacture

First published as part of AS 2220—1978.

AS 2220—1978 (in part) revised and redesignated

PREFACEThis Standard was prepared by the Standards Australia Committee BD/56, EmergencyWarning and Intercommunication Systems in Buildings It is Part 1 of a two-partStandard, the parts of which are as follows:

AS

2220 Emergency warning and intercommunication systems in buildings

Part 1: Equipment design and manufacture (this Standard) Part 2: System design, installation and commissioning

This Standard together with AS 2220.2 superseded AS 2220—1978, Emergency

warning and intercommunication systems for buildings.

This Standard provides more detailed requirements than AS 2220—1978 but it doesnot differ in the overall intent of that Standard

AS 1851, Maintenance of fire protection equipment, Part 10: Emergency warning and

intercommunication systems, specifies the periodic inspection and maintenance

requirements to ensure continued effective functioning of the emergency warning andintercommunication systems designed and installed in accordance with AS 2220

This Standard does not seek to define the buildings in which these systems are to beused as it is considered that this is the responsibility of the Building Authority in thearea concerned

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Page

FOREWORD 4

SECTION 1 SCOPE AND GENERAL 1.1 SCOPE 5

1.2 APPLICATION 5

1.3 REFERENCED DOCUMENTS 5

1.4 DEFINITIONS 5

SECTION 2 EMERGENCY WARNING SYSTEM 2.1 GENERAL 7

2.2 SYSTEM FUNCTIONS 7

2.3 SYSTEM COMPONENTS 7

2.4 EMERGENCY CONTROL PANELS (ECPs) 7

2.5 MAIN EQUIPMENT 9

2.6 ACTUATION DEVICES 12

SECTION 3 EMERGENCY INTERCOMMUNICATION SYSTEM 3.1 GENERAL 13

3.2 SYSTEM FUNCTIONS 13

3.3 ADDITIONAL EQUIPMENT AT THE ECPs 13

3.4 EQUIPMENT FOR WARDEN INTERCOMMUNICATION POINT (WIP) 13

3.5 PERFORMANCE 13

3.6 FUNCTIONAL REQUIREMENTS 14

3.7 POWER SUPPLY 14

SECTION 4 EQUIPMENT DESIGN AND CONSTRUCTION 4.1 GENERAL 15

4.2 ELECTRICAL 15

4.3 MECHANICAL 15

4.4 MARKING AND IDENTIFICATION OF EQUIPMENT 16

SECTION 5 PERFORMANCE TESTING 5.1 GENERAL 17

5.2 FUNCTIONAL ASSESSMENT 17

5.3 ENDURANCE TEST 17

SECTION 6 DOCUMENTATION 6.1 GENERAL 21

6.2 OPERATOR’S MANUAL 21

6.3 TECHNICAL MANUAL 21

6.4 LOGBOOK 22

APPENDICES A TYPICAL BLOCK SCHEMATIC OF BASIC EWIS 23

B IN FO RM AT IO N T O BE S UP PL IE D WH EN S PE CI FY IN G AN EM ER GE NC Y WA RN IN G A ND IN TE RC OM MU NI CA TI ON SY ST EM 24

C TYPICAL EMERGENCY CONTROL PANELS 25

D PREPARATION FOR TESTING 27

E OPERATIONAL TEST 28

F TRANSIENT VOLTAGE TEST PROCEDURES 29

G ELECTROMAGNETIC COMPATIBILITY TEST PROCEDURES 31

An emergency warning and intercommunication system is installed in a building forthe purpose of enabling the orderly evacuation of the building in the event of anemergency To achieve this aim, it is essential that the emergency warning andintercommunication system has the following capabilities as appropriate:

(a) Provision for manual and automatic activation

(b) On activation, the ability to alert wardens with an audible alarm (A visual alarmmay also be required.)

(c) Where both an emergency warning system and an emergency intercommunicationsystem are required to comply with AS 2220, these systems are integrated toprovide a positive means of intercommunication between the House Warden andthe various floors or Zone Wardens to enable the orderly evacuation of thebuilding

(d) Emission of audible or visible signals, or both, that will either (i) alert the occupants; or

-(ii) order the occupants to vacate the building

(e) Ease of operation

(f) Continuously operable under the conditions of the hazard

STANDARDS AUSTRALIA

Australian Standard Emergency warning and intercommunication systems in buildings

Part 1: Equipment design and manufacture

SECTION 1 SCOPE AND GENERAL

requirements for the design and manufacture of the

intercommunication systems, which are installed in

buildings to ensure warning in the event of an

emergency, and assist in the subsequent orderly

evacuation of the building

warning and intercommunication systems in buildings

shall comply with Sections 2, 3 and 4 of this Standard

NOTE: Information which should be supplied when specifying an

EWIS is shown in Appendix B.

documents are referred to in this Standard:

AS STANDARDS

1044 Limits of electromagnetic interference for

electrical appliances and equipment

1076 Code of practice for selection, installation

and maintenance of electrical apparatus andassociated equipment for use in explosiveatmospheres (other than mining applications)1076.1 Part 1: Basic requirements

1099 Basic environmental testing procedures for

electrotechnology

1102 Graphical symbols for electrotechnical

documentation1102.101 Part 101: General information and general

index1102.105 Part 105: Semiconductor and electron tubes

1560 Recommendations for the design and use of

components intended for mounting on printedcircuit boards

1603 Automatic fire detection and alarm systems

1603.4 Part 4: Control and indicating equipment

1931 High voltage testing techniques

1931.1 Part 1: General definitions, test requirements

test procedures and measuringdevices

1939 Classification of degrees of protection

provided by enclosures of electricalequipment

2036 Manually operating fire-alarm call points

2220 Emergency warning and intercommunication

systems in buildings2220.2 Part 2: System design, installation and

commissioning

2481 All-or-nothing electrical relays (instantaneous

and timing relays)

2546 Printed boards

2546.1 Part 1: General requirements and test

methods2546.3 Part 3: Design and use

2547 Semiconductor devices2547.2.1 Part 2.1: Integrated circuits—General2547.2.2 Part 2.2: Integrated circuits—Digital

AUSTELREG 2 Int erwo rkin g and non- interfer ence

requirements for customer premisesequipment attached to the public switchedtelephone network

REG 3 General requirements for customer switching

systems attached to the public switchedtelephone network

IEC

249 Base materials for printed circuits249-2 Part 2: Specifications

801 Electromagnetic compatibility for industrial

process measurement and control equipment801-3 Part 3: Radiated electromagnetic field

requirementsUL

94 Tests for flammability of plastic materials for

parts in devices and appliances

APPROVAL AND TEST SPECIFICATIONS

AS

3100 Approval and test specification for definitions

and general requirements for electricalmaterials and equipment

3108 Isolating transformers and safety isolating

transformers3108.1 Part 1: General requirements3108.2 Part 2: Supplementary requirements—

Isolating transformers3108.3 Part 3: Supplementary requirements—

Safety isolating transformers

3126 Extra-low voltage transformers

3159 Electronic sound and vision equipment

3250 Mains operated electronic and related

equipment for household and similar generaluse

1.4 DEFINITIONS For the purpose of this Standard,

the definitions below apply

1.4.1 Alarm system—facility provided in a building to

give an alarm in the event of fire, civil commotion,bomb threat, leakage of toxic or noxious fumes,structural damage, or other emergency

1.4.2 Alarm signal—a signal given by fire alarm, or

other alarm system, at the fire indicator panel (FIP) orother point at the building, and to places outside thebuilding, e.g to a fire brigade

1.4.3 Alert signal—an audible signal, or combination of

audible and visible signals, from the emergency warning

system to alert wardens and other nominated personnel

as necessary to commence prescribed actions

1.4.4 Approved and approval—approved by, or the

approval of, the Regulatory Authority concerned

1.4.5 Emergency-alarm-initiating device—a manually

operated device by which an alarm is given to indicate

an emergency

1.4.6 Emergency control panel (ECP)—a panel by

means of which the emergency warning system and the

emergency intercommunication system (if any) in the

building may be operated

NOTE: See also definition of master emergency control panel

(MECP).

1.4.7 Emergency warning and intercommunication

system (EWIS) In this Standard the acronym EWIS is

used to refer to a system which may be either an

emergency warning system or a combined emergency

warning and intercommunication system

1.4.8 Emergency warning system (EWS)—a system to

provide a distinctive audible signal, verbal address, and

visible signals as required, for emergency alarm

purposes

communication between the controlling emergency

control panel (ECP) and the warden intercommunication

points (WIPS)

1.4.10 Evacuation signal—an audible signal, or

combination of audible and visible signals, from the

emergency warning system to indicate to wardens and

building occupants generally that evacuation or other

prescribed actions are necessary

1.4.11 Evacuation zone—a specific portion of a

building or complex, in which the evacuation procedures

are managed by one zone warden

NOTE: This term should not be confused with the concept of ‘fire

alarm zone’ as defined in AS 1603.4 Fire alarm zone may or may

not cover the same area as an evacuation zone.

1.4.12 Fire indicator panel (FIP)—a panel on which

is mounted an indicator or indicators together with

associated equipment for the fire alarm or sprinkler

system

1.4.13 House warden—a person who, during an

emergency, assumes control over the building andits occupants and is the prime contact with theappropriate emergency service(s)

control panel (ECP) that on manual operation of itskey switch, takes full control of the emergency

w a r n i n g s y s t e m a n d t h e e m e r g e n c yintercommunication system, and overrides all otherECPs in the building

administering Acts of Parliament or Regulationsunder such Acts

NOTE: Where adoption of this Standard is not a requirement

of a Regulatory Authority but is a requirement of a body such

as a relevant company or association, then that body, or their nominee such as the Insurance Council of Australia, may perform the functions of the Regulatory Authority for the purposes of this Standard.

If the EWIS is one provided by virtue of Statutory Regulations, the relevant department will have authority If

it is a matter of insurance, the relevant insurance company or association may have authority.

1.4.16 Repeater panel (RP)—an indicator panel

which visually repeats alarm signals from all alarmzone facilities

whereby verbal instruction is given from thecontrolling emergency control panel (ECP) to thebuilding occupants via the loud speaker systems

(WIP)—the location on a floor or evacuation zone,

instructions can be received from the controllingemergency control panel (ECP) via the emergencyintercommunication system

during an emergency, assumes control over aparticular floor or evacuation zone under thedirection of the house warden

SECTION 2 EMERGENCY WARNING SYSTEM

(EWS) shall provide a totally independent emergency

warning system to alert occupants of a building to a

potential emergency situation and to initiate orderly

evacuation of the building, if required

2.2 SYSTEM FUNCTIONS The emergency warning

system shall perform the following functions:

(a) Generate alert and evacuation signals in individual

evacuation zones within a building

(b) Facilitate verbal address to individual evacuation

zones and throughout the building

(c) Indicate system status and faults

(d) Operate from a dedicated battery power supply in

the event of power failure

Where both an emergency warning system and an

emergency intercommunication system are provided,

these system shall be integrated The operation of EIS

shall not be inhibited when the EWS is in use

The system may be used for non-emergency functions,

such as paging and background music, during times of

normal occupancy All non-emergency functions shall be

disabled during an emergency or power failure

components form parts of a system (see Appendix A for

a typical block schematic):

(a) Emergency control panels (ECPs) including verbal

address microphone

(b) Main equipment which includes amplifier and

evacuation tone generators, automatic level

controller, sound system power amplifiers, fault

monitoring equipment, and power supply (batteries

and charger)

(c) Devices including loud speaker, visible alarm

devices, and emergency alarm initiating devices

(d) Wiring (as specified in AS 2220.2)

NOTE: This Standard recognizes and is appropriate to the following

system configurations:

(a) A system operating from a single cabinet containing all

control, signalling and amplification equipment.

(b) As for (a) but with a single or multiple remote ECPs.

(c) As for (a) and (b) but with distributed amplification

equipment located in evacuation zones.

2.4 EMERGENCY CONTROL PANELS (ECPs).

2.4.1 General The emergency warning system may

incorporate one or more ECPs to provide a control and

indication interface with the system The ECP may be

co-located with the main equipment or at one or a

number of strategically located control positions

indicators and controls shall be provided at each ECP:

ISOLATE switch as follows:

(i) Automatic position. In the AUTOMATIC

position, the actuation of the alarm systemshall activate the relevant warning system inthe alert mode The key shall be removableonly in the AUTOMATIC position A greenlight shall indicate the AUTOMATIC position

NOTE: The system should remain in the AUTOMATIC position

at all times unless the house warden is attending to the emergency.

(ii) Manual position In the MANUAL position,

the automatic initiation of the emergencywarning system shall be inhibited

The purpose of the MANUAL position shall

be to permit normal control of the warningsystem irrespective of the state of the alarmsystem and also to negate the actuation of thewarning system during routine testing ormaintenance of the warning system or alarmsystems

Any ECP shall be able to take control of theemergency warning system by turning the keyswitch to the MANUAL position and, once incontrol, it shall inhibit control of the systemfrom other ECPs Only the master emergencycontrol panel (MECP) key switch being placed

in its MANUAL position shall override anyECP in its MANUAL position

(iii) Isolate position In the ISOLATE position,

the ECP shall be disabled from distributingaudible and visible signals throughout thebuilding by key panel operation All otherfunctions shall remain operative

NOTE: In this mode, the ECP may be used for training purposes without disturbing the building occupants.

(iv) Keys. All EWIS keys shall be keyed alikewith the fire indicator panel (FIP)

(b) Control switches, to cause individual orsimultaneous actuation of warning signal and publicaddress announcement at selected floors orevacuation zones These controls can also be usedfor test periods, trial evacuation practices, etc

NOTE: Different evacuation zones should be able to receive different signals simultaneously or individually, e.g.

Evacuation zones 9 and 10 alert Evacuation zone 8 public address Evacuation zone 7 evacuate Evacuation zone 6 public address Evacuation zones 1 to 5 alert.

(c) A microphone, to permit transmission ofinstructions to selected floors over the warningsystem This microphone may normally be that

intercommunication (see Section 3) connectedthrough a press-to-talk switch on the ECP.Alternatively the microphone may be a hand-held,noise-cancelling device complete with press-to-talkswitch, with coiled flexible cord permanentlyconnected to the control panel, and shall have aretaining clip

NOTE: High energy radio frequency fields may be present due

to close proximity of the police or fire brigade using radio transceivers during an emergency (See Clause 4.2.6.)

(d) An audible indicator, capable of drawing immediateattention to either of the following:

(i) An external alarm condition

(ii) A system fault

The sound level of the audible indicator shall be at

least 80 dB(A) measured at a distance of 1 m from

the ECP with the cabinet door (if any) closed

The audible indicator shall be provided with an

acknowledgment switch which mutes the audible

indicator and changes the associated display from

flashing to steady Subsequent alarm conditions or

system faults shall reactivate the indicator

2.4.3 Discrete-switch type panel ECPs which use

individual switches to control the operation of the

EWIS on each evacuation zone shall comply with the

following:

(a) Switches shall provide visual and tactile or

audible feedback to the operator

(b) Visible indicators, in accordance with

Clause 2.4.5.5 shall be mounted in or adjacent to

the switches and shall operate within 500 ms of

switch actuation

(c) Selection of any function shall automatically

cancel any previous function for the same

evacuation zone

(d) Two types of manual operation as follows:

(i) All zone mode Operation of the warning

system on all evacuation zones of the

building in a common mode In this mode

of operation, the selected signal, e.g., Alert,Evacuation, Public Address shall betransmitted to all zones simultaneously The

‘All Alert’, ‘All Evacuate’ and ‘All PublicAddress’ switches shall be latched

Individual functions shall be overriddenwhenever an ‘All’ function is in operation

The ‘Cancel’ switch shall reset theselected function

(ii) Individual zone mode. Operation of the

warning system on selected evacuationzones of the building In this mode ofoperation, selected signals, e.g Alert,Evacuation, Public Address, shall betransmitted to different evacuation zones

The ‘Alert’, ‘Evacuation’ and ‘PublicAddress’ functions shall be latched The

‘Cancel’ switch shall reset the evacuationzone

key-pad and associated microprocessor to control the

operation of the EWS shall comply with the

following:

(a) The key-pad shall be arranged to provide visual

and tactile or audible feedback

(b) Visible indicators including alphanumeric

displays shall comply with Clause 2.4.5.5

Alphanumeric displays shall incorporate

sufficient characters to permit a complete

message to be displayed without scrolling Seven

segment displays shall not be used

Where liquid crystal displays are used they shall

i nco r po r at e b ack l i gh t i ng I ncan des cen t

backlighting is not acceptable

(c) The sequence of a key-pad entry shall be the

evacuation zone followed by the function (e.g

45-evacuate) On completion of a key-pad entry, the

alphanumeric display within 500 ms and request thatthe ‘OK’ key be pressed to activate the function Theclearing of a ‘non-keyed’ entry shall be achieved bypressing the ‘CANCEL’ key

(d) Any incorrect command shall bring up on thedisplay an ‘error’ message, in plain English,without abbreviations

(e) Operation shall be in an ‘ALL ZONE MODE’,and ‘INDIVIDUAL ZONE MODE’ basis, asfollows:

(i) All zone mode Selection of the ‘ALL’ area

key shall cause the selected signal to bedistributed to all evacuation zones of thebuilding

(ii) Individual zone mode. Selection of anindividual evacuation zone shall distributethe selected signal to the requiredevacuation zone

NOTE: Pre-selected groups of zones may be pre-programmed to allow activation by a single key.

(f) Cancellation of an existing function shall beachieved by rekeying the relevant zone(s)followed by the required function, and pressingthe ‘OK’ key when prompted

(g) A repeater panel shall be incorporated into thekey-pad type panel to indicate the functions thatare active for each evacuation zone

2.4.5 Arrangement of indicators and controls.

2.4.5.1 General The indicators and controls at the

ECP shall be arranged ergonomically

The indicators shall be arranged in a pattern that willgive an easily interpreted layout of the evacuationzones in a building for which it is intended Theyshall be arranged per evacuation zone and they shallprovide the operator with information on the progress

of the operation

discrete-switch type panel is specified, this shallhave, for each zone, individual function switchestogether with their respective indications, arranged in

a pattern that will give an easily interpreted layout ofthe evacuation zones in a building for which it isintended (See Figure C1, Appendix C, for a typicalexample.) They shall be arranged per evacuation zoneand they shall provide the operator with information

on the progress of the operation

2.4.5.3 Key-pad type panel Where a key-pad type

panel is specified, this shall incorporate a dedicatedkey for each of the functions, namely alert,evacuation, public address and cancellation, plus aseparate numerical keyboard which shall allow forfloor or evacuation zone selection The keyboard shallprovide formation of groups by using a ‘to’ key, e.g

‘7-to-10-Evacuate’ would initiate evacuation in zones7,8,9 and 10 (See Figure C1, Appendix C, for atypical example.)

2.4.5.4 Functions and colours The functions and

the associated colours shall be in accordance withTable 2.1

2.4.5.5 Visible indicators Visible indicators shall be

readily distinguishable when viewed from a distance

of 1 m and at all angles of up to 30 degrees from the

indicator’s axis when the panel in which the indicator

is located, is illuminated at a level of 600 lx The

flashing frequency shall be between 1 Hz and 2 Hz

Incandescent lamps are not acceptable

TABLE 2.1 CONTROL AND INDICATOR COLOURS

Actuate alert tone Amber, steady

Actuate evacuation tone Red, steady

Actuate public address systems Amber, steady

A combined fire and local alarm

indication for each evacuation zone

Red, flashing, steady

on acknowledgment Fault/audible indicator Amber, flashing, steady

on acknowledgment

2.4.5.6 Labelling of indicators and controls. All

EWIS indicators and controls shall be indelibly

labelled with their actual function name or a readily

recognizable abbreviation

2.4.6 ECP circuit protection The integrity of the

circuit connections between the ECPs located

continuously monitored Loss of communications due

to a fault shall be raised as an alarm at the MECP

2.5 MAIN EQUIPMENT.

emergency warning system comprises all necessary

automatic control, signalling, amplification and power

supplies to provide system operation in conjunction

with an ECP and remote actuation devices

2.5.2 System operation.

2.5.2.1 General The system shall provide for—

(a) automatic initiation of the EWS by the activation

of any alarm initiating device or alarm system,

connected to the EWS; and

(b) manual operation by key switch at the ECP

buildings with 6 or more evacuation zones, automatic

execution of the evacuation shall be arranged so that

the affected evacuation zones have first priority and

the other evacuation zones are evacuated in a logical

sequence

NOTE: As an example for a multistorey building, this order of

priority could be as follows:

(a) Emergency—affected level.

(b) Two levels above.

(c) Level below.

(d) Other levels in priority order.

2.5.2.3 Interconnection of alarm systems The main

equipment shall be interconnected with the FIP,

where provided An isolation facility shall be

incorporated to prevent automatic actuation of the

emergency warning system under test conditions Any

other alarm system connected to the emergency

warning system shall have a similar facility

Isolation of alarm initiating signalling lines shall raise

a fault indication (see Clause 2.5.7.2)

2.5.2.4 Automatic overriding of ancillary functions.

Where the emergency warning system is intended to beused as a paging-background music system undernon-emergency conditions, priority shall be given to theemergency warning functions when manually orautomatically activated Where local volume controlsare incorporated, these shall be by-passed when theemergency warning system is activated The by-passshall be wired in a fail-safe mode

2.5.2.5 Circuit integrity The system shall be designed

so that failure of any component within any evacuationzone, including conductors, amplifiers, and faultdetection systems, does not affect the normal operation

of other evacuation zones

2.5.2.6 Actuation of warning signals. Any alarmcondition initiated via alarm initiating signal lines from—(a) alarm systems;

(b) emergency alarm initiating devices; and(c) any selected warning signal function keyed in at acontrolling ECP;

shall cause the distribution of warning signals to theappropriate evacuation zones within 5 s

2.5.2.7 System program Where a programmed system

is incorporated, it shall be non-volatile, i.e a failure ofelectrical power shall not require re-programming

2.5.3 Warning signal generation.

2.5.3.1 Audible signals Alert and evacuation signals

shall be provided in accordance with the followingrequirements:

(a) Alert signal The audible alert signal shall be a

repetitive interrupted square wave of 420 Hzhaving equal on-off duration of 0.625 s each.Upon assignment of an alert signal to anevacuation zone, the first tone burst shall be 50 dB

AS 2220.2; each successive tone burst shall have

an amplitude of 10 dB above that of the previousone until the maximum is reached at the sixth toneburst All subsequent tone bursts after the sixthshall have the maximum output specified in

AS 2220.2

A graphical representation of the alert signal isgiven in Figure 2.1

(b) Evacuation signal-automatic mode The evacuation

signal shall be emitted in cycles of 24 s duration.Each cycle shall consist of four identical bursts

of a frequency-modulated square wave increasingfrom 500 Hz to 1200 Hz, followed by twoidentical verbal messages, in accordance withFigure 2.2 except that for special applications thetotal length of the verbal message may beextended up to 20 s per cycle, but the four tonebursts per cycle shall remain

(c) Evacuation signal-manual mode The evacuation

signal shall be a frequency-modulated squarewave uniformly increasing from 500 Hz to

1200 Hz at a repetition rate of 15 cycles perminute The signal should have an ON duration

of 3.75 s and an OFF duration of 0.25 s giving atotal of ON-OFF duration of 4.0 s

(d) Stored verbal message The verbal message shall

be either digitally stored or utilize voice synthesized

techniques The verbal message derived from either

method should be clear, intelligible and without

accent The signal shall have a minimal operational

band width of 300 Hz to 4 kHz

Each message, in a form that is applicable to the

particular building, shall instruct occupants to

evacuate the building as directed

(e) Tolerances The frequencies and durations given

for audible signals specified herein may vary within

±5 percent, within the full operating temperature

range, including anticipated long-term ageing

effects Digitally generated, frequency stepped

increments shall not exceed 4 percent

2.5.3.2 Visible signals. Where required, the visible

signal for alert and evacuation shall be flashing lights,

having not less than 60 and not more than 120 flashes

per minute The colours of these lights shall be amber

for alert and red for evacuation

2.5.3.3 Duration of alert signal The alert signal shall

continue on until manual control of the system is taken

and, if not responded to within a prescribed time from

initiation, the automatic evacuation sequence shallcommence The prescribed time shall be established tosuit the particular building, but it shall not exceed

10 min

2.5.4 Automatic level controller The main equipment

shall incorporate an automatic level controller with adynamic range of at least 30 dB, to ensure voicemessages from ECPs are distributed to amplifiers at alevel which ensures compliance with sound performancerequirements

2.5.5 Sound system amplifiers.

2.5.5.1 Design and output Pre-amplifiers and power

amplifiers shall be of solid state design The output level

of amplifiers shall be adjustable Adjustments shall bepreset on the circuit card

2.5.5.2 Performance. Each amplifier shall have theperformance characteristics shown in Table 2.3

2.5.5.3 Power rating and regulation. The nominalaverage power rating of each amplifier shall be not lessthan 3 dB above the average power required to producethe prescribed sound levels in the respective evacuationzone

The line output shall be floating above ground potential

FIGURE 2.1 GRAPHICAL REPRESENTATION OF THE ALERT SIGNAL

FIGURE 2.2 AUTOMATIC EVACUATION-SIGNAL CYCLE

Line output voltage regulation shall be within 1 dB

between full load and no load

TABLE 2.3 PERFORMANCE CHARACTERISTICS OF

Signal-to-noise ratio ≥ 60 dB

Distortion when operated at any point

within its power rating within the specified

bandwidth

≤ 2 percent

2.5.5.4 Short-circuit and open-circuit protection In the

event of a short-circuit or open-circuit speaker line, the

respective evacuation zone amplifier shall draw not more

than 20 percent current in excess of the existing speaker

load

NOTE: This will prevent the amplifier drawing excessive power

from the time-limited emergency battery power.

Amplifier output shall be capable of operating into an

open-circuit or short-circuit without damage Protection

circuits shall be self-restoring

2.5.6 Battery charger.

2.5.6.1 General The battery charger shall be of a type

appropriate to the battery characteristics and shall be

capable of charging the batteries within 24 h from the

discharged condition to full capacity, while providing the

quiescent load of the system, including any ancillary

functions connected to the system for use in

non-emergency conditions The float charge voltage shall

be capable of being set to the battery manufacturer’s

specification for power source variations within the limits

specified in Clause 2.5.6.5 and for operation within the

temperature limits specified for the equipment

NOTE: For certain types of batteries, temperature compensation of

charging voltage may be required to minimize electrolyte loss.

Reference to manufacturer’s technical data is recommended.

Where the battery charger is located remotely from the

batteries, remote battery voltage-sensing facilities shall

be provided to ensure the correct charging voltage at the

batteries

2.5.6.2 Charger failure alarm Failure of the battery

charger or its supply shall bring up a flashing visual and

audible alarm at the ECPs The audible alarm shall be

provided with a ‘mute’ switch having a reset capability

which, after resetting, will accept subsequent fault alarms

and will change the flashing visible indicator to a steady

visual alarm The visible indicator shall be such that it

can be cleared only by repairing the fault

2.5.6.3 Mains-isolating switch. A multiple isolating

switch, appropriately labelled and within the equipment

enclosure, shall be provided to isolate all active and

neutral conductors of the a.c mains supply from the

permanently connected equipment power supply and

battery charger Operation of this switch shall not

disconnect the battery circuit from the equipment

2.5.6.4 Battery protection. A suitable overload

protection device, such as a circuit-breaker, shall be

installed as close as possible to the battery An audible

and visual alarm at the ECPs shall be provided Thisalarm will signal or indicate the breaking of the circuit.The alarm supply line shall be protected againstoverload

Voltages shall be individually generated within theequipment No tapping of the battery is permitted toderive intermediate voltages

2.5.6.5 Voltage and current regulation. Outputparameters of the battery charger shall remain within thespecified limits under normal input power sourcevariations from +6 percent to -10 percent

Voltage regulation and current limiting circuit shall beprovided so that the battery manufacturer’s ratings arenot exceeded

2.5.7 Fault monitoring.

2.5.7.1 General Continuous automatic monitoring of

the tone generator, evacuation zone amplifiers, theoutgoing loudspeaker lines and the visual alarm lines forshort-circuit and open-circuit conditions shall beprovided The failed circuit shall indicate the faultassociated with the appropriate evacuation zone Anyfault condition shall be announced within 2 s in allmodes at the ECP

2.5.7.2 Alarm-initiating signal lines Alarm-initiating

signal lines shall comply with the following:

(a) Fault monitoring (supervision) is required for signallines between alarm systems and main equipmentwhen automatic evacuation sequencing is required(see Clause 2.5.2.2)

(b) Supervision is required for master alarm-initiatingsignal lines from alarm systems located within thebuilding

alarm-initiating lines

2.5.7.3 Lamp test facility A common lamp test facility

shall be provided, to monitor lamp operation by means

of a non-latching switch

2.5.8 Serial interface for monitoring and control

communications port to facilitate computer-based remotemonitoring and control of the system Where provided,the port shall comply with the following:

(a) Control functions through this port shall only beoperable when an automatic/manual/isolate switchprovided in accordance with Clause 2.4.2 in theremote equipment is in the ‘MANUAL’ position.(b) It shall not be possible to re-program any automaticevacuation sequences contained in the EWIS usingthis communications port

(c) Any fault in equipment connected to this port shallnot affect the correct operation of the EWIS whenoperating under automatic control or when anMECP is in manual control of the system

(d) Computer systems connected to the datacommunications port shall not utilize any automaticevacuation sequencing programs when controllingthe evacuation of a building in its manual switchedposition

NOTE: The command structure and screen display of the remote equipment is not specified in this Standard.

2.6 ACTUATION DEVICES. Actuation devices

shall be connected to the emergency warning system

to provide audible and visible indication in

evacuation zones and to provide manual activation of

the system

2.6.1 Loudspeakers. Loudspeakers shall have a

minimum frequency response within ±6 dB in the

frequency range from 0.3 kHz to 10 kHz The line

transformer shall not have insertion losses exceeding

1 dB at 100 Hz and at full rated loudspeaker power

NOTE: It is recommended to use variable tap transformers to

accommodate future changes in sound-pressure levels.

2.6.2 Visual alarm devices Visual alarm devices

shall be zenon discharge type with a minimum flash

energy of 2.5 J They shall be installed in areas with

high ambient noise levels or in areas where audible

signals are inappropriate

Devices shall be powered from the EWS power supply

Emergency-alarm- initiating devices shall be of the

‘break-the-glass’ type and shall comply with AS 2036except where otherwise specified in this Standard.The operation of an emergency-alarm-initiating deviceshall raise an alarm on the ECP together with anindication of the zone initiating activation

The device shall be coloured white and shall be labelled

‘Emergency alarm’ in black letters not less than 5 mmhigh on a white background

NOTE: It is not intended that these emergency-alarm-initiating devices automatically call external emergency services (e.g Fire brigade, police, etc).

SECTION 3 EMERGENCY INTERCOMMUNICATION SYSTEM

system shall be independent of all other communication

systems within the building This shall be integrated with

the emergency warning system and it shall comply with

this Section The operation of the EWS shall not be

inhibited when the EIS is in use

The emergency intercommunication system shall remain

active when the key switch is in the AUTOMATIC and

MANUAL positions

intercommunication system shall comply with the

following:

(a) At each ECP, it shall provide facilities for the house

warden to—

(i) call individual warden intercommunication

simultaneously, with group connection at hisdiscretion; and

(ii) converse with each WIP on a full duplex

basis Voice-switch systems are notacceptable

When using all call address, communicationshould be mono-directional from the ECP

NOTE: In addition, there may be specified facilities provided for the house warden to converse with up to five WIPs on a conference basis (see Clause 3.5.7).

(b) It shall provide facilities for any WIP to call the

controlling ECP

(c) It shall provide equipment to enable controlling

ECP to accept calls at the house warden’s

discretion

(d) It shall provide distinctive call signals at the ECPs

and WIPs as follows:

(i) Audible and visible signal at the ECPs

(ii) Audible signal at each WIP

(e) Direct calling between WIPs is not permitted

3.3 ADDITIONAL EQUIPMENT AT THE ECPs.

3.3.1 Controls and indicators. In addition to the

indicators required for the emergency warning systems,

those listed in Table 3.1 shall be provided at the ECPs

TABLE 3.1 CONTROL AND INDICATOR COLOURS

Zone warden calling ECP or

ECP calling zone warden

Red, flashing on call initiated, steady on connection Fault indication Amber, flashing, steady

on acknowledgment Evacuation zone cleared

indication (memory button)

Green, steady

Call initiations to WIPs shall be accomplished by

pressing a push button with a latching function This

shall initiate a call signal at the selected WIP, which

shall continue, until the call is answered or cancelled

The arrangement of the displays and controls shall besimilar to that of the emergency warning system

3.3.2 Handset A handset shall be provided at the

ECP with mouthpiece and earpiece permanentlyconnected to the rest of the apparatus by means of aflexible cord

When the handset is lifted, calls can be initiated fromthe ECP and any incoming intercommunicationaudible call signals shall be muted

The handset shall be made of a high-impact material

each WIP, wall-mounted equipment shall be providedfor the purpose of communicating with the controllingECP The apparatus shall be made of red high-impactmaterial

3.5 PERFORMANCE.

3.5.1 Quality of transmission Voice transmission

and reception quality shall be not less than thatcurrently used by Telecom Australia

NOTE: Performance requirements are contained in the relevant clauses of Austel Regulations REG2 and REG3.

3.5.2 Audible call signal The distinctive audible

signal shall be at least 80 dB(A) when measured at

1 m from the apparatus and shall continue until thecalled party lifts the handset unless cancelled

At the ECP, the audible call signal shall bedistinguishable from fault alarm audible indicatoroperation

Removal of a WIP handset from its cradle shallautomatically call the controlling ECP The audiblecall signal shall be at least 80 dB(A) when measured

at 1 m from the ECP

3.5.4 Confidence tone When a handset is removed

from its cradle, a tone shall be heard in the earpiece.This tone shall be generated in the main equipment

At the WIP, the tone shall continue until the call isanswered

At the ECP, the tone shall continue until a call to aWIP is initiated, at which time, the tone shall becomeperiodic at the same rate as the flashing indicator, andcontinue until the call is answered or cancelled.The confidence tone shall be reinstated whenconnections are terminated

3.5.5 WIP circuit independence An open-circuit or

short-circuit fault on the connection to one WIP shallnot affect the operation of the remainder of thesystem

3.5.6 All-call address. For the all-call addressfacility, the speech and call signal level shall be equal

to that of a single call

3.5.7 Group conversation. Where facilities forgroup conversation are provided, this shall be limited

to five WIPs and the signal clarity and level shall beequal to that of a single call

3.5.8 Fault monitoring. Continual automatic

monitoring of the call signal lines and speech lines for

open-circuit and short-circuit conditions shall be

provided The fault condition shall be announced within

2 s via an audible and visual fault indication

3.5.9 System program Where a programmed system

is incorporated, it shall be non-volatile i.e failure of

electrical power shall not require reprogramming

3.6 FUNCTIONAL REQUIREMENTS Emergency

intercommunication systems shall comply with theequipment design and construction requirements ofSection 4, as appropriate

intercommunication system shall obtain its powerfrom the emergency warning system power supply

SECTION 4 EQUIPMENT DESIGN AND CONSTRUCTION

4.1 GENERAL All materials and components shall

comply with the relevant Australian Standards The

equipment shall be suitable for an operating

environment within the temperature range -5°C to

(non-condensing), and shall be designed to comply

with the performance requirements specified in

Section 5

4.1.1 Installation height. All ECP zone facility

indicators and controls shall be designed for

installation heights between 750 mm and 1850 mm

from floor level

4.1.2 Hazardous locations. Where parts of the

EWIS are used in hazardous locations, they shall be

approved for use in such locations

equipment is required it should be included in the

ECP enclosure

Telecom lines shall comply with the relevant Austel

regulations

4.2 ELECTRICAL.

4.2.1 General The equipment shall be designed to

operate in a voltage transient, electromagnetic

interference environment specified in Clause 4.2.5

and Section 5 without degradation or malfunction

Components and conductors of the equipment shall be

adequately sized, insulated, or supported with

sufficient clearance being provided to ensure that no

live part can make contact with any exposed metal or

other component or conductor, such as will cause any

accessible part or terminal to become a live part, and

so that no fire hazard shall occur

electronic components shall be suitably rated to

withstand the conditions that will occur inside an

electronics enclosure when subjected to the tests

specified in this Standard Equipment design shall

ensure that the components used shall not exceed the

limits specified by the component manufacturer

4.2.3 Voltage. Voltages in excess of extra-low

voltage shall be physically separated and electrically

isolated from extra-low voltage operated equipment

in accordance with AS 3100

4.2.4 Printed boards. All printed boards shall

comply with AS 2546.1 The material used for

fabrication shall be flame-resistant, and equal in

quality to that specified in IEC 249 Part 2,

Specification 5 (249-2-5-IEC-EP-GC-CU)

NOTES:

1 Conductor width and thickness specifications should be in

accordance with AS 2546.3 and spaced in accordance with

AS 3250.

2 Epoxide woven glass fabric, copper clad laminate sheet

complying with the requirements of UL 94 for grades V0 and

V1 is an acceptable material.

4.2.5 Electomagnetic compatibility All circuitry

of the EWIS shall be designed to provide immunity

to high energy radio frequency fields in its proximity

(See Clause 5.3.2.7 for performance testing)

NOTE: High energy radio frequency fields may be present due

to close proximity of the police or fire brigade using radio transmitters during an emergency.

4.2.6 Transformers. Power supply transformersshall comply with AS 3126 Power transformeroverload protection shall be provided on all secondarywindings, with an appropriately rated fuse orcircuit-breaker

4.3 MECHANICAL.

4.3.1 Modular construction The equipment shall

be of modular construction with plug-in electronicsub-assemblies

strength of all equipment panels and subassembliesshall be adequate to support the weight ofcomponents mounted thereon, and the panels andsubassemblies shall be sufficiently rigid to preventany detrimental effects due to bending or handlingthroughout the life of the equipment

4.3.3 Accessibility The equipment shall be easily

accessible for maintenance purposes Subassembliesshall be capable of removal by use of ordinary handtools without the removal of components on thesubassembly A minimum space of 50 mm fromterminal blocks shall be provided to permit easyaccess for incoming external wiring

4.3.4 Equipment enclosures and subassemblies.

Equipment enclosures and subassemblies shall complywith the following, as appropriate:

(a) Equipment enclosures shall comply with

AS 3000

(b) The creation, in equipment, of moisture traps orcrevices which would tend to impair insulationresistance or set up conditions assisting corrosionshall be avoided

(c) Equipment, as would be installed, shall withstandwithout failure the impact test specified in

AS 1099

(d) The equipment enclosures shall have a protectivesurface finish suitable for normal operation andenvironment Treated surfaces such as paint,coatings, platings, or etching shall be completed,uniform and free from scratches or voids.(e) Cable entry in the form of knockouts or glandplates shall be provided These entry points shall

be sufficient to accommodate the incomingcabling to the equipment enclosures and shall beprocessed at the manufacturing stage of theenclosure

(f) The equipment enclosure, including cable entrypoints, shall be adequately dust sealed, inaccordance with AS 1939, IP51 (Category 2).(g) The equipment enclosure shall have adequatespace to contain the system logbook specified in

AS 2220.2

(h) Where an ECP is located in a position accessible

to the public or subject to unauthorizedtampering, an equipment enclosure door with

l o c k a n d k e y i n ac c o r d a n ce w i t hClause 2.4.2(a)(iv) shall be provided

(i) Where equipment enclosure doors cover controls

and indicators, a rigid transparent viewing panel

shall be provided in the door so that the status of

the indicators and their associated zone labelling

may be seen without opening the door

(j) Screws used for manufacture and installation

shall not be threaded directly into sheet metal

panels unless the threaded length of the tapped

hole is at least equal to the diameter of the

screw Where this is not possible, backing blocks

or formed holes shall be employed Screw

threads and fixings shall comply with AS 3100

Where components are usually removed for

servicing, self-tapping screws shall not be used

(k) Tapped holes in non-metallic materials shall not

be used Metal inserts arranged so that they will

not rotate or loosen are permitted

4.3.5 Battery enclosures Batteries shall be secured

from unauthorized persons

Non-sealed batteries shall be located in a separate

enclosure sealed from other parts of the electronic

equipment The enclosure shall be protected against

corrosion and shall be well ventilated and be of such

a size as will permit easy access for battery

inspection and maintenance without need to

disconnect individual cells or batteries

EQUIPMENT.

4.4.1 Enclosure marking. Each enclosure shall

comply with the marking requirements of AS 3100

and have a prominent and permanently attached name

plate with the following information:

(a) Name of manufacturer

4.4.2.1 Printed circuit board (PCB) component

references Each PCB component shall have a circuit

reference designation indelibly marked on the PCB

adjacent to the component so that it can be seen

without removing any component and the removal or

replacement of components does not destroy the

identification Where this is not practicable, the

component designation shall be shown pictorially inthe EWIS technical manual (See Section 6.)

Operational function and test points for checkingvoltages and wave shapes shall also be markedindelibly on each circuit board or in the EWIStechnical manual

4.4.2.2 Transformers and terminals. Marking oftransformers and terminals shall be in accordancewith AS 3000, AS 3100, and AS 3108.1, AS 3108.2and AS 3108.3 The minimum requirements are asfollows:

(a) Transformers.

(i) Name of manufacturer

(ii) Type and approval numbers

(iii) P ri mary an d s econ d ary v o l tag es,frequencies and currents

(b) Terminals. These shall be clearly labelled toshow the input and output voltages and the type

of circuit connected, e.g mains connection

‘active’, ‘neutral’ and the earthing lug ‘earth’

4.4.2.3 Fuses Fuses shall be indelibly marked as

near as practicable to the fuse-holder with thefollowing information:

(a) Circuit reference

(b) Current rating and fuse type

NOTE: Manufacturers making a statement of compliance with this Australian Standard on a product, or on packaging or promotional material related to that product, are advised to ensure that such compliance is capable of being verified Independent certification is available from Standards Australia under the StandardsMark Product Certification Scheme The StandardsMark, shown below, is a (registered) certification trade mark owned by Standards Australia and granted under licence to manufacturers whose products comply with the requirements of suitable Australian Standards and who operate sound quality assurance programs to ensure consistent product quality Further information on product certification and the suitability

of this Standard for certification is available from Standards Australia’s Quality Assurance Services, 1 The Crescent, Homebush, N.S.W., 2140.

SECTION 5 PERFORMANCE TESTING

intercommunication system (EWIS) tests shall be carried

out in the order set out in Figures 5.1 and 5.2 which

includes the electrical and mechanical construction

requirements in Section 4

Where failure occurs during testing, the manufacturer

may rectify the fault However the sequence of tests shall

recommence from the beginning of the particular test in

which the equipment failed Where changes to the

equipment are made that would affect the previous test

results, then those previous tests shall be repeated

5.2 FUNCTIONAL ASSESSMENT.

5.2.1 Operational state. The EWIS shall be tested

under full load conditions in accordance with Appendix

E

5.2.2 Operational test The EWIS shall be tested in

accordance with Appendix E

The equipment shall comply with the following:

(a) There shall be no operational malfunction

(b) There shall be no mechanical deterioration

(c) There shall be no obvious performance degradation

5.3 ENDURANCE TEST.

5.3.1 Impact test A free-fall test shall be performed

in which the bottom of the EWIS enclosure or

sub-assembly racks shall fall flat onto concrete floor from a

height of 100 mm After the fall, EWIS shall—

(a) be inspected, and any loose or faulty components

shall be recorded and rectified by the manufacturer

before retesting; and

(b) remain in good serviceable condition, and be

checked in accordance with Clause 5.2.2

Equipment connected externally to the enclosure

and the battery shall not be included in this test

5.3.2 Environmental tests.

5.3.2.1 General Environmental tests shall be conducted

in the following sequence:

(a) Cold test (see Clause 5.3.2.4)

(b) Dry heat test (see Clause 5.3.2.5)

(c) Damp heat test (see Clause 5.3.2.6)

All evacuation zone equipment shall undergo

environmental tests

5.3.2.2 Abnormal environmental considerations Where

equipment is installed outside the environment conditions

of -5°C to +45°C, any tests that apply shall ensure that

the equipment performs satisfactorily under the most

onerous environmental conditions required for the

particular project in which it will be installed

5.3.2.3 Forced air ventilation Where the test chamber

has forced air ventilation, the EWIS shall be subjected to

the additional test conditions in accordance with

AS 1099.2Ad and AS 1099.2Bd

5.3.2.4 Cold test. The EWIS shall be tested in

accordance with AS 1099.2Ad and the following

(d) The EWIS shall be switched on and operated in itsfully loaded condition in accordance withParagraph D3 of Appendix D If the EWIS isprovided with artificial heating and/or cooling, thefacility shall be allowed to operate in a mannerwhich would simulate the normal service situation.(e) Decrease the ambient temperature of the testchamber to -10°C and maintain for 16 h The rate

of change of temperature shall not exceed 1°C/min

to avoid temperature shock

(f) Where practicable carry out the operational test (seeClause 5.2.2) and note results

(g) Increase the ambient temperature of the testchamber to room temperature and maintain for arecovery period of not less than 2 h

(h) Check that temperature and humidity limits for therecovery period are as follows:

(i) Temperature: between 15°C and 25°C.(ii) Relative humidity: between 45% and 75%.(i) Conduct the operational test (see Clause 5.2.2)

5.3.2.5 Dry heat test. The EWIS shall be tested inaccordance with AS 1099.2Bd and the followingprocedure:

Paragraph D3 of Appendix D

(b) Conduct the operational test (see Clause 5.2.2)

NOTE: Where conditions (a) and (b) have been complied with from the previous test, it is not necessary for them to be repeated.

(c) The EWIS shall be installed in the test environment

in its normal service orientation A free flow of airaround the specimen shall be maintained throughoutthe test Battery supplies shall be removed andsimulated for the duration of the test

(d) The EWIS shall be switched on and operated in itsfully loaded condition in accordance withParagraph D3 of Appendix D If the EWIS isprovided with artificial cooling, the cooling facilityshall be allowed to operate in a manner whichwould simulate the normal service situation.(e) Increase the ambient temperature of the testchamber to 55°C±2°C and maintain for 16 h Therate of change of temperature shall not exceed

1°C/min to avoid temperature shock

(f) Where practicable carry out the operational test (seeClause 5.2.2) and note results

(g) Decrease the ambient temperature of the testchamber to room temperature and maintain for arecovery period of not less than 2 h