AS NZS 2293 2 1995 emergency evacuation lighting for buildin

Title AS/NZS 2293.2:1995 Emergency evacuation lighting for buildings - Inspection and maintenance Licensee Licensed to LUU MINH LUAN on 25 Feb 2002 Conditions of use This is a licensed electronic copy of a document where copyright is owned or managed by Standards Australia International Your licence is a single user licence and the document may not be stored, transferred or otherwise distributed on a network You may also make one paper copy of this document if required Web Check-up AS/NZS 2293.2:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian/New Zealand Standard Emergency evacuation lighting for buildings Part 2: Inspection and maintenance AS/NZS 2293.2:1995 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee LG/7, Emergency Lighting in Buildings It was approved on behalf of the Council of Standards Australia on 31 May 1995 and on behalf of the Council of Standards New Zealand on 29 May 1995 It was published on September 1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The following interests are represented on Committee LG/7: Administrative Services Department, Queensland Association of Consulting Engineers Australia Australian Building Codes Board Australian Construction Services — Department of Administrative Services Australian Electrical and Electronic Manufacturers Association Australian Institute of Building Surveyors Building Industry Authority, New Zealand Building Management Authority of Western Australia Building Owners and Managers Association of Australia Department of Housing and Urban Development, South Australia Department of Planning and Development, Victoria Electricity Supply Association of Australia Illuminating Engineering Society of Australia and New Zealand National Electrical Contractors Association of Australia New South Wales Fire Brigades New South Wales Public Works New Zealand Electrical Regulatory Authorities New Zealand Manufacturers Federation WorkCover Authority of New South Wales Review of Standards To keep abreast of progress in industry, Joint Australian/ New Zealand 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 edition, and any amendments thereto Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines ‘The Australian Standard’ and ‘Standards New Zealand’, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed Notification of any inaccuracy or ambiguity found in a Joint Australian/New Zealand 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 92201 AS/NZS 2293.2:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian/New Zealand Standard Emergency evacuation lighting for buildings Part 2: Inspection and maintenance PUBLISHED JOINTLY BY: STANDARDS AUSTRALIA The Crescent, Homebush NSW 2140 Australia STANDARDS NEW ZEALAND Level 10, Radio New Zealand House, 155 The Terrace, Wellington 6001 New Zealand ISBN 7262 9887 AS / NZS 2293.2:1995 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee LG/7, Emergency Lighting in Buildings, to supersede AS 2293.2 — 1987* and, in part, NZS 6742:1971† The Standard sets out requirements for the periodic inspection and maintenance procedures which should be instituted for emergency evacuation lighting systems The objective of these requirements is to ensure that such lighting systems will be in a state of readiness for operation at all times Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The changes in this edition are primarily a consequence of alterations made in AS/NZS 2293.1—1995‡ The following changes of significance have been introduced: (a) New procedures are specified for the monitoring of emergency lighting systems which are provided with automatic discharge test facilities (see Clauses 2.2.7.2, 2.3.7.2 and 3.2.2.2) (b) A requirement has been added for a visual check on an annual basis to ensure that emergency luminaires and exit signs operate in correct relationship to the normal lighting in the designated area (see Clauses 2.3.6(c) and 3.3(c)) (c) For indirect emergency lighting systems, a check is required of the aiming of emergency luminaires of the directional beam type (see Clauses 2.2.6 and 3.2.3) (d) For central systems which reticulate d.c., a new requirement is specified for measurement of the maximum voltage during boost charging, where applicable (see Clause 2.3.7.1) Attention is drawn to the guidance given in AS 2676.1§ and AS 2676.2§ the maintenance of batteries used in central systems Provision has been maintenance of battery systems which is carried out in accordance with AS 2676.2 to be accepted in lieu of the comparable requirements of this Clause 2.1) in relation to made for the AS 2676.1 or Standard (see The term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies An ‘informative’ appendix is only for information and guidance * AS 2293.2 — 1987 Emergency evacuation lighting in buildings Part 2: Inspection and maintenance † NZS 6742:1971 Code of practice for emergency lighting in buildings ‡ AS/NZS 2293.1 — 1995 Emergency evacuation lighting for buildings Part 1: System design, installation and operation § AS 2676 Guide to the installation, maintenance, testing and replacement of secondary batteries in buildings AS 2676.1 Part 1: Vented cells AS 2672.2 Part 2: Sealed cells AS / NZS 2293.2:1995 CONTENTS Page SECTION SCOPE AND GENERAL 1.1 SCOPE 1.2 REFERENCED DOCUMENTS 1.3 DEFINITIONS 1.4 GENERAL REQUIREMENTS 4 4 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited SECTION INSPECTION AND MAINTENANCE PROCEDURES FOR CENTRAL SYSTEMS 2.1 REQUIRED PROCEDURES 2.2 SIX-MONTHLY PROCEDURES 2.3 TWELVE-MONTHLY PROCEDURES SECTION INSPECTION AND MAINTENANCE PROCEDURES FOR SINGLE-POINT SYSTEMS 3.1 REQUIRED PROCEDURES 3.2 SIX-MONTHLY PROCEDURES 3.3 TWELVE-MONTHLY PROCEDURES 3.4 BATTERY REPLACEMENT 10 10 11 11 APPENDICES A INFORMATION TO FACILITATE THE MAINTENANCE OF BATTERIES AND BATTERY CHARGERS 12 B CLEANING OF EMERGENCY LUMINAIRES AND EXIT SIGNS 13 Originated in Australia as AS 2293.2 — 1979 Previous edition 1987 Originated in New Zealand as part of NZS 6742:1971 AS 2293.2 — 1987 and part of NZS 6742:1971 jointly revised and designated AS/NZS 2293.2:1995 Incorporating: Amdt 1—1998 © Copyright STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND Users of Standards are reminded that copyright subsists in all Standards Australia and Standards New Zealand publications and software Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia or Standards New Zealand may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia or Standards New Zealand Permission may be conditional on an appropriate royalty payment Australian requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia New Zealand requests should be directed to Standards New Zealand Up to 10 percent of the technical content pages of a Standard may be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia or Standards New Zealand Inclusion of copyright material in computer software programs is also permitted without royalty payment provided such programs are used exclusively in-house by the creators of the programs Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised The number and date of the Standard should therefore be clearly identified The use of material in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty This policy may be varied by Standards Australia or Standards New Zealand at any time AS / NZS 2293.2:1995 STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND Australian / New Zealand Standard Emergency evacuation lighting for buildings Part 2: Inspection and maintenance S E C T I O N S C O P E A N D G E N E R A L 1.1 SCOPE This Standard sets out the periodic inspection and maintenance procedures which are necessary to ensure that emergency evacuation lighting systems will be in a state of readiness for operation at all times It applies to central and single-point emergency lighting systems, as defined in AS/NZS 2293.1 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 1.2 REFERENCED DOCUMENTS Standard: The following documents are referred to in this AS 1042 Direct-acting indicating electrical measuring instruments and their accessories 1680 1680.1 Interior lighting Part 1: General principles and recommendations 2668 Water for use in secondary batteries 2676 Guide to the installation, maintenance, testing and replacement of secondary batteries in buildings Part 1: Vented cells Part 2: Sealed cells 2676.1 2676.2 AS/NZS 2293 Emergency evacuation lighting for buildings 2293.1 Part 1: System design, installation and operation 1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS/NZS 2293.1 apply 1.4 GENERAL REQUIREMENTS 1.4.1 Maintenance of the installation Emergency evacuation lighting systems shall be inspected and maintained in accordance with the relevant procedures specified in this Standard The inspection and maintenance procedures shall be carried out only by persons having qualifications and experience suitable for the work on which they are engaged NOTE: Section of AS/NZS 2293.1 specifies the provision of an operating and maintenance manual to assist in conducting the inspection and maintenance checks required by this Standard It requires that the information listed in Appendix A of this Standard be included in the manual for the guidance of maintenance personnel 1.4.2 Maintenance records A logbook in a durable hard-bound cover, or an alternative system approved by the regulatory authority, shall be provided for the recording of maintenance information The following details shall be entered: (a) All details which are required to be logged in accordance with Section or Section 3, as appropriate (b) Any corrective action taken COPYRIGHT (c) AS / NZS 2293.2:1995 The names of persons responsible for carrying out the maintenance work and the date the work was completed Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The logbook or alternative records system shall be kept on the premises at all times, or at such other location as may be approved by the regulatory authority COPYRIGHT AS / NZS 2293.2:1995 S E C T I O N I N S P E C T I O N A N D M A I N T E N A N C E P R O C E D U R E S F O R C E N T R A L S Y S T E M S 2.1 REQUIRED PROCEDURES The inspection and maintenance procedures specified in Clauses 2.2 and 2.3 shall be carried out at the intervals specified Corrective action shall be undertaken, as necessary, to ensure that the emergency lighting system will continue to function effectively Details of such actions shall be recorded in the logbook Whenever data are recorded for individual cells of the battery, cell numbers shall be designated in sequence, commencing from the positive end Maintenance of battery systems that is carried out in accordance with the procedures of AS 2676.1 or AS 2676.2, as applicable, shall be deemed to comply with the appropriate clauses in this Section 2.2 SIX-MONTHLY PROCEDURES Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 2.2.1 General The procedures specified in Clauses 2.2.2 to 2.2.7 inclusive shall be carried out at intervals of not greater than six months 2.2.2 Batteries The following checks shall be made on batteries of the type which require maintenance of the electrolyte above a specified level: (a) Check the electrolyte level in each cell and, with water complying with AS 2668, top up those cells that are markedly lower than the general level The electrolyte level shall be checked and topped up, if necessary, before the battery is boost-charged (if this is required) NOTE: During boost-charging, the electrolyte level rises owing to the release of gas and increase in temperature Consequently, a false level will be indicated if the check is made within a period of h following a boost charge (b) Inspect all cell containers for electrolyte leakage Neutralize and mop up any spilt liquid as necessary (see Paragraph A4 of Appendix A) For all types of batteries, inspect cell connections for signs of corrosion and tighten any loose joints Treat all exposed metal surfaces with a coating of petroleum jelly or other suitable battery terminal preservative 2.2.3 Battery chargers The following checks shall be made on battery chargers: (a) Visually inspect all components for any condition which could cause a malfunction Pay particular attention to indicating lamps, relays and contactors (b) Remove any dust or dirt that may have accumulated within the cubicle (c) Note the battery voltage and check the reading against data in the operating and maintenance manual to ensure that, when corrected for temperature, the reading lies within the normal float voltage limits (d) Check all connections for tightness 2.2.4 Central inverters The following checks shall be made on central inverters: (a) Visually inspect components for any condition which could cause a malfunction (b) Note d.c input voltage and current, and record in the logbook Check the readings against data in the operating and maintenance manual to ensure that they are within the tolerance limits of the inverter COPYRIGHT (c) AS / NZS 2293.2:1995 Note a.c output voltage and current, and record in the logbook Check the readings against data in the operating and maintenance manual to ensure that they are within the output tolerances given for the inverter NOTE: This procedure may be carried out in conjunction with the system check of Clause 2.2.7 2.2.5 Distribution and control equipment distribution and control equipment: The following checks shall be made on (a) Visually inspect relays, contactors, circuit-breakers and fuses for any condition that could cause a malfunction (b) Check all connections for tightness (c) Remove any dust or dirt that may have accumulated within distribution and control equipment enclosures (d) Isolate the coil circuits of all sensing relays or contactors from the a.c supply and observe correct operation to bring on the emergency lighting NOTE: This procedure may be carried out in conjunction with the system check of Clause 2.2.7 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 2.2.6 Emergency luminaires and exit signs All emergency luminaires and exit signs shall be checked to ensure that they function satisfactorily Any defective lamps shall be replaced NOTES: This procedure may be carried out in conjunction with the system check of Clause 2.2.7 For emergency luminaires and exit signs with tubular fluorescent lamps, it is recommended that the lamps be replaced if they exhibit excessive end-blackening, even when the lamps still operate For indirect lighting systems, carry out the following checks: (a) Check that the finish of the major reflecting surfaces (e.g walls, ceilings) have reflectances of not less than those on which the design of the system was based (b) Check that emergency luminaires of the directional beam type, if used, are aimed in such a manner that the beam will not be directed into the eyes of persons moving through the designated area 2.2.7 System check 2.2.7.1 Manual discharge test facilities Where manual discharge test facilities are provided, the following procedure shall be carried out to check the operation of the emergency lighting system: (a) Turn the battery charger off, simulate a mains failure and carry out a partial discharge test at 100 percent of the installed emergency lighting load Allow the test to continue until the operation of all emergency luminaires and exit signs has been checked, as required by Clause 2.2.6 During the discharge test, check that the charger-failure alarm operates satisfactorily (b) Restore the system to normal operation, turn the battery charger on and recharge the battery 2.2.7.2 Automatic discharge test facilities Where automatic discharge test facilities are provided, a visual check shall be made of the operational status of all emergency luminaires and exit signs by means of the indications given at the controller or associated indicator panel Those units which failed the previous discharge test shall be either repaired and restored to normal condition or replaced NOTE: A system check may also be carried out at any time using the manual initiation facility, where provided in accordance with Section of AS/NZS 2293.1 COPYRIGHT AS / NZS 2293.2:1995 2.3 TWELVE-MONTHLY PROCEDURES 2.3.1 General The procedures specified in Clauses 2.3.2 to 2.3.7 inclusive shall be carried out at intervals of not greater than 12 months NOTES: With reference to the discharge test of Clause 2.3.7, it should be noted that for part of the test period the building may be without emergency lighting This risk is considered acceptable, except where the regulatory authority deems otherwise When selecting a time for the discharge test, consideration should be given to the nature of the occupancy of the building in order to minimize the risk, e.g conducting the test discharge at a time that will permit recharging of the battery when the building is unoccupied A check should be made to ensure that no interruption to the normal supply has taken place for a period of 16 h prior to conducting the discharge test of Clause 2.3.7 2.3.2 Batteries Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 2.3.2.1 General The checks specified in Clauses 2.3.2.2 and 2.3.2.3, as applicable, shall be carried out on batteries Procedures that involve inspection and topping up of electrolyte apply only to batteries of the type which require maintenance of the electrolyte above a specified level The battery/cell data obtained shall be compared to the limits given in the operating and maintenance manual Where departures from the given limits are observed, appropriate corrective action shall be taken NOTE: See Appendix A for information to facilitate the maintenance of batteries 2.3.2.2 Lead-acid batteries For lead-acid batteries only, the following data shall be obtained for each cell in the battery: (a) Electrolyte density (b) State of charge determined from the measured electrolyte density and the data provided in the operating and maintenance manual 2.3.2.3 All types of batteries (including lead-acid batteries) For all types of batteries, including lead-acid batteries, carry out the procedures specified in Clause 2.2.2 and the following additional check: With the battery on float-charge, measure the overall battery voltage and individual cell voltages with an instrument having an accuracy of Class 1.5 or better in accordance with AS 1042 Check the readings to the second decimal place 2.3.3 Battery charger assembly charger assembly: The following checks shall be made on the battery (a) Carry out all the checks listed in Clause 2.2.3 (b) Check the calibration of voltmeters with an instrument having an accuracy of Class 1.5 or better, in accordance with AS 1042 (c) Check that the battery earth-fault detection system, if provided, operates satisfactorily NOTE: Section of AS/NZS 2293.1 specifies that an earth-fault detection system be provided and includes requirements for such systems (d) Check that the battery low-voltage alarm, if provided, operates satisfactorily This may be carried out either by extending the discharge test specified in Clause 2.3.7.1(a) or by simulating a low-voltage condition NOTE: Section of AS/NZS 2293.1 specifies that a low-voltage alarm system be provided and includes requirements for such systems COPYRIGHT AS / NZS 2293.2:1995 2.3.4 Inverters The following checks shall be made on inverters: (a) Carry out all the checks listed in Clause 2.2.4 (b) Check the calibration of voltmeters with an instrument having an accuracy of Class 1.5 or better in accordance with AS 1042 2.3.5 Distribution and control equipment Carry out all the checks listed in Clause 2.2.5 2.3.6 Emergency luminaires and exit signs The following checks shall be made on emergency luminaires and exit signs: (a) Carry out all the checks listed in Clause 2.2.6 (b) Clean all light-emitting and reflecting surfaces NOTE: Appendix B gives guidance on appropriate cleaning materials and their use (c) Visually check to ensure that emergency luminaires and exit signs operate in correct relationship to the normal lighting in the designated area (see requirements for the arrangement and control of central systems in Section of AS/NZS 2293.1.) Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited NOTE: This procedure may be carried out in conjunction with the discharge test of Clause 2.3.7 2.3.7 Discharge test 2.3.7.1 Manual discharge test facilities Where manual discharge test facilities are provided, the following procedure shall be carried out to check the operation of the emergency lighting system (see Notes to Clause 2.3.1): (a) Turn the battery charger off, simulate mains failure, and carry out a discharge test using 100 percent of the installed emergency lighting load Allow the test to continue for the required in-service duration On completion of the discharge test, measure the battery voltage If the battery voltage is below acceptable limits, the battery shall be either reserviced or replaced NOTES: Provision may be made for continuance of the discharge test beyond the required in-service duration Acceptable limits for the battery voltage are specified in Section of AS/NZS 2293.1 (b) Restore the system to normal operation, turn the battery charger on, and manually select the boost-charge mode, if provided Carry out the following: (i) Check that, after the batteries have been recharged, the battery charger has changed over automatically to the float-charge mode (ii) For d.c reticulated systems, measure the maximum voltage at the origin of the emergency lighting distribution system during boost charging NOTE: This check may require the connection of a suitable peak-reading voltage measuring instrument during boost charging The voltage measured as required by Item (ii) shall be not more than 116% of the nominal system voltage When it is necessary for the battery to be replaced, the emergency lighting system shall be recommissioned in accordance with the above procedure, except that the discharge test shall be continued for 1.33 times the required in-service duration 2.3.7.2 Automatic discharge test facilities Where automatic discharge test facilities are provided, a visual check shall be made of the operational status of all emergency luminaires and exit signs by means of the indications given at the controller or associated indicator panel Those units which failed the previous discharge test shall be either repaired and restored to normal condition, or replaced NOTE: A discharge test may also be carried out at any time using the manual initiation facility, where provided in accordance with Section of AS/NZS 2293.1 COPYRIGHT AS / NZS 2293.2:1995 10 S E C T I O N I N S P E C T I O N A N D M A I N T E N A N C E P R O C E D U R E S F O R S I N G L E - P O I N T S Y S T E M S 3.1 REQUIRED PROCEDURES The procedures described in Clauses 3.2 and 3.3 shall be carried out at intervals of not greater than those specified Groups of self-contained emergency luminaires and exit signs may be tested on a rotational basis, provided that the maintenance intervals for the individual luminaires or exit signs not exceed those specified Any emergency luminaire or exit sign which fails to operate satisfactorily shall be either repaired or replaced Where battery replacement is necessary, the requirements of Clause 3.4 shall apply Details of any corrective actions taken shall be recorded in accordance with Clause 1.4.2 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited NOTE: With reference to the discharge test of Clause 3.2, it should be noted that for part of the test period the building may be without emergency lighting This risk is considered acceptable, except where the regulatory authority deems otherwise When selecting a time for the discharge test, consideration should be given to the nature of the occupancy of the building in order to minimize the risk, e.g conducting the test discharge at a time that will permit recharging of the battery when the building is unoccupied 3.2 SIX-MONTHLY PROCEDURES 3.2.1 General The procedures specified in Clauses 3.2.2 and 3.2.3 shall be carried out at intervals of not more than six months NOTES: A check should be made to ensure that no interruption to the normal supply has taken place for a period of at least 16 h prior to conducting a discharge test For emergency luminaires and exit signs with tubular fluorescent lamps, it is recommended that the lamps be replaced if they exhibit excessive end-blackening, even when the lamps still operate 3.2.2 Discharge test 3.2.2.1 Where manual discharge test facilities are provided Where manual discharge test facilities are provided, the following procedures shall be carried out: (a) Operate the emergency luminaires and exit signs from their battery supply by simulating failure of the monitored supply The luminaires and exit signs shall remain illuminated for not less than the required in-service duration NOTE: Provision may be made for continuance of the discharge test beyond the required duration, e.g until operation is terminated by the automatic battery cut-off device (b) Restore the emergency luminaires and exit signs to normal condition and check that the battery charger operation indicator functions correctly 3.2.2.2 Automatic discharge test facilities Where the emergency luminaires or exit signs are provided with facilities for automatic discharge testing, a visual check shall be made of the operational status of each unit either by means of the indicator at each unit, where self-contained facilities are provided, or by means of the relevant controller or indicator panel where centralized testing facilities are provided Those units which failed the previous discharge test shall be either repaired and restored to normal condition, or replaced NOTE: A discharge test may also be carried out at any time using the manual initiation facility, where provided in accordance with Section of AS/NZS 2293.1 COPYRIGHT 11 AS / NZS 2293.2:1995 3.2.3 Additional check for indirect lighting systems For indirect lighting systems, carry out the following: (a) Check that the finish of the major reflecting surfaces (e.g walls, ceilings) have reflectances of not less than those on which the design of the system was based (b) Check that emergency luminaires of the directional beam type, if used, are aimed in such a manner that the beam will not be directed into the eyes of persons moving through the designated area 3.3 TWELVE-MONTHLY PROCEDURES out at intervals of not more than 12 months: The following procedures shall be carried (a) Carry out all the checks listed in Clause 3.2 (b) Clean all light-emitting and reflecting surfaces of emergency luminaires and exit signs NOTE: Appendix B gives guidance on appropriate cleaning materials and their use Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited (c) A visual check shall be made to ensure that the emergency luminaires and exit signs operate in correct relationship to the normal lighting in the designated area (see requirements for the arrangement and control of single-point systems in Section of AS/NZS 2293.1.) NOTE: This procedure may be carried out in conjunction with the discharge test of Clause 3.2.2 3.4 BATTERY REPLACEMENT Whenever the batteries of emergency luminaires and exit signs are replaced for any reason, such replacements shall be made in accordance with the following: (a) Where more than one cell is utilized, the complete battery pack shall be replaced (b) Replacement batteries shall be of the same type and ampere-hour capacity (c) A discharge test shall be conducted in accordance with Clause 3.2.2 except that the test shall be continued for 1.33 times the required in-service duration COPYRIGHT AS / NZS 2293.2:1995 12 APPENDIX A INFORMATION TO FACILITATE THE MAINTENANCE OF BATTERIES AND BATTERY CHARGERS (Informative) A1 CHECKING OF ELECTROLYTE LEVEL It is to be expected that the electrolyte level will gradually decrease owing to loss of water by gassing and evaporation The rate of decrease varies for each installation depending on frequency of discharge/charge cycles; no general guidance can therefore be given on the decrease to be expected However, on float-charging, negligible water consumption indicates undercharging and excessive water consumption indicates overcharging Experience will determine the normal pattern, and instances of marked departure from this pattern should be investigated to determine the cause and appropriate corrective action taken Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Individual cells of a battery which display these abnormalities should be inspected for— (a) internal short-circuits; and (b) loose or corroded intercell connections A2 BATTERY FLOAT-VOLTAGE LIMITS During a routine test, if the battery float-voltage is discovered to be outside the limits determined from data in the operating and maintenance manual, the cause may be one of the following: (a) Faulty voltage regulation of the battery charger (b) Mains voltage variation outside the input voltage tolerances specified for the battery charger in Section of AS/NZS 2293.1 (c) Battery charger overloaded This may occur where an emergency lighting load is connected permanently across the battery and the load exceeds that for which the battery charger is designed (d) Inaccurate d.c voltmeter A3 CELL FLOAT-VOLTAGES / ELECTROLYTE DENSITY During routine tests of cells, individual cells displaying abnormal cell voltages or electrolyte density should be checked for— (a) internal short-circuits; and (b) loose or corroded intercell connections NOTE: Electrolyte density refers to lead-acid batteries When the cause is identified, appropriate corrective action should be taken The importance of this lies in the fact that early cell failure or loss of reserve capacity may result from a float-voltage outside the specified limits A4 NEUTRALIZING SPILT BATTERY LIQUID Spilt battery liquid can be neutralized by application of the following solutions: (a) Liquid from lead-acid batteries — washing soda (b) Liquid from nickel-cadmium batteries — 3% boric acid solution COPYRIGHT 13 AS / NZS 2293.2:1995 APPENDIX B CLEANING OF EMERGENCY LUMINAIRES AND EXIT SIGNS (Informative) Emergency luminaires and exit signs should be cleaned at regular intervals to remove accumulated dust or other deposits from the light transmitting and reflecting surfaces To maintain the overall efficiency of the luminaire or exit sign, it is essential that the correct cleaning compound be used for the particular materials involved Table B1 provides guidance on appropriate cleaning materials and their use NOTE: The information in Table B1 has been based on recommendations for the maintenance of interior lighting systems in Section 12 of AS 1680.1 TABLE B1 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited CLEANING SOLUTIONS AND THEIR USE Material to be cleaned Most suitable cleaner Alternative cleaners Remarks — Acidic or alkaline cleaners may cause chalking of the oxide surfaces Aluminium should be rinsed thoroughly after cleaning Aluminium Soap and water Glass Detergents and water Proprietary glazing cleaners Polishing pastes and fluids are not recommended as these may leave a film on the glass surface which affects its characteristics in relation to moisture and dirt adhesion Kerosene should not be used Plastic Non-ionic detergents and water Ordinary detergents and water Dust accumulates from a static charge developing on the plastic It should not, therefore, be wiped but allowed to drip-dry after cleaning Anti-static treatments are commercially available either as a polish, spray or solution in the rinse bath Petroleum-based solvents should not be used Vitreous enamel Detergents and water Proprietary glazing cleaners See above remarks for ‘Glass’ Stoved enamel Detergents and water — COPYRIGHT Abrasive cleaners should not be used as they will damage the finish  ... * AS 2293.2 — 1987 Emergency evacuation lighting in buildings Part 2: Inspection and maintenance † NZS 6742:1971 Code of practice for emergency lighting in buildings ‡ AS/ NZS 2293.1 — 1995 Emergency. .. that emergency evacuation lighting systems will be in a state of readiness for operation at all times It applies to central and single-point emergency lighting systems, as defined in AS/ NZS 2293.1... lighting for buildings Part 2: Inspection and maintenance AS/ NZS 2293.2:1995 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee LG/7, Emergency Lighting in Buildings