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1、AS/NZS 3666.2:2002 Australian/New Zealand Standard Air-handling and water systems of buildingsMicrobial control Part 2: Operation and maintenance AS/NZS 3666.2 Building Code of Australia Primary referenced Standard Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only
2、. Storage, distribution or use on network prohibited. AS/NZS 3666.2:2002 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee ME-062, Ventilation and Airconditioning. It was approved on behalf of the Council of Standards Australia on 8 March 2002 and on behalf of the
3、Council of Standards New Zealand on 21 March 2002. It was published on 2 May 2002. The following interests are represented on Committee ME-062: Air-Conditioning and Refrigeration Equipment Manufacturers Association of Australia Australasian Fire Authorities Council Australian Building Codes Board Au
4、stralian Chamber of Commerce and Industry Australian Industry Group Australian Institute of Building Surveyors Australian Institute of Refrigeration Air Conditioning and Heating Chartered Institution of Building Services Engineers Department of Contract and Management Services, W.A. FPA Australia In
5、stitute of Refrigeration Heating and Air Conditioning Engineers of New Zealand Institute of Engineers Australia Plastics and Chemicals Industries Association Property Council of Australia Additional interests participating in the preparation of this Standard: Department of Human Services (Vic) Depar
6、tment of Human Services (Tas) Institute of Plant Engineers Australasia National Health and Medical Research Council NSW Health Department Queensland Health Telstra Corporation Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To ma
7、intain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may
8、 have been published since the Standard was purchased. Detailed information about joint Australian/New Zealand Standards can be found by visiting the Standards Australia web site at .au or Standards New Zealand web site at www.standards.co.nz and looking up the relevant Standard in the on-line catal
9、ogue. Alternatively, both organizations publish an annual printed Catalogue with full details of all current Standards. For more frequent listings or notification of revisions, amendments and withdrawals, Standards Australia and Standards New Zealand offer a number of update options. For information
10、 about these services, users should contact their respective national Standards organization. We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Please address your comments to the Chief
11、 Executive of either Standards Australia International or Standards New Zealand at the address shown on the back cover. This Standard was issued in draft form for comment as DR 00269. Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use
12、on network prohibited. AS/NZS 3666.2:2002 Australian/New Zealand Standard Air-handling and water systems of buildingsMicrobial control Part 2: Operation and maintenance Originated as part of AS 36661989. Previous edition AS/NZS 3666.2:1995. Second edition 2002. COPYRIGHT Standards Australia/Standard
13、s New Zealand All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Jointly published by Standards Australia International Ltd, GPO Box 5420, Sydney, NS
14、W 2001 and Standards New Zealand, Private Bag 2439, Wellington 6020 ISBN 0 7337 4453 2 Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS/NZS 3666.2:20022 PREFACE This Standard was prepared by the Joint Standa
15、rds Australia/Standards New Zealand Committee ME-062, Ventilation and Airconditioning, to supersede AS/NZS 3666.2:1995. This Standard forms Part 2 of a series of Standards for the microbial control of air-handling and water systems, as follows: AS/NZS 3666Air-handling and water systems of buildings
16、Microbial control 3666.1Part 1:Design, installation and commissioning 3666.2Part 2:Operation and maintenance 3666.3Part 3:Performance-based maintenance of cooling water systems The term informative has been used in this Standard to define the application of the appendix to which it applies. An infor
17、mative appendix is only for information and guidance. Notes to clauses in the Standard are informative only. Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS/NZS 3666.2:20023 CONTENTS Page SECTION 1SCOPE AND
18、 GENERAL 1.1SCOPE.4 1.2OBJECTIVE4 1.3APPLICATION .4 1.4REFERENCED DOCUMENTS.4 1.5DEFINITIONS.5 SECTION 2OPERATION AND MAINTENANCE 2.1SCOPE.6 2.2GENERAL.6 2.3MAINTENANCE OF AIR-HANDLING SYSTEMS 7 2.4MAINTENANCE OF HEATED WATER SYSTEMS.8 2.5MAINTENANCE OF COOLING WATER SYSTEMS.8 2.6OPERATING AND MAINT
19、ENANCE MANUALS AND MAINTENANCE RECORDS.9 APPENDIX AGUIDELINES FOR THE USE OF PERSONAL PROTECTIVE EQUIPMENT DURING INSPECTION AND MAINTENANCE OF AIR-HANDLING AND WATER SYSTEMS 10 Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use on net
20、work prohibited. AS/NZS 3666.2:2002 COPYRIGHT 4 STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND Australian/New Zealand Standard Air-handling and water systems of buildingsMicrobial control Part 2: Operation and maintenance S E C T I O N 1 S C O P E A N D G E N E R A L 1.1 SCOPE This Standard specifies min
21、imum requirements for the operation and maintenance of air- handling and water systems of buildings for the purposes of microbial control. It does not include requirements for refrigerated room airconditioners and non-ducted split systems. NOTES: 1 In the event of an outbreak of legionnaires disease
22、, special action will be necessary. This will be advised by the health authorities. 2 Further information on the control of microbial growth in air-handling and water systems of buildings is given in HB 32. 3 Design, installation and commissioning requirements are given in AS/NZS 3666.1. 4 AS/NZS 36
23、66.3 provides a performance-based alternative to the prescriptive cleaning requirements of Clause 2.5 of this Standard. 5 Refer to regulatory authority for application of the criteria to buildings. 1.2 OBJECTIVE The objective of this Standard is to assist users in the control of microorganisms in bu
24、ilding systems, particularly those associated with legionnaires disease, Pontiac fever, hypersensitivity pneumonitis and humidifier fever. 1.3 APPLICATION This Standard is intended for use by regulatory authorities, building services designers, architects, equipment manufacturers and suppliers, inst
25、allers, maintenance personnel, managers, owners, and operating staff responsible for designing, installing, commissioning, operating, and maintaining the air-handling and water systems of a building. It provides minimum requirements. The Standard shall be read in conjunction with any additional reco
26、mmendations given by suppliers of the equipment and with the requirements of any relevant specification or applicable regulation. NOTE: This Standard has been developed for commercial building services systems. The technical content may be applied by the regulatory authority to other commercial or i
27、ndustrial systems and to domestic systems incorporating a cooling water system. 1.4 REFERENCED DOCUMENTS The following documents are referred to in this Standard: AS 1470Heath and safety at workPrinciples and practices Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence
28、only. Storage, distribution or use on network prohibited. AS/NZS 3666.2:2002 COPYRIGHT 5 AS 1657Fixed platforms, walkways, stairways and laddersDesign, construction and installation 1851Maintenance of fire protection equipment 1851.6Part 6:Management procedures for maintaining the fire precaution fe
29、atures of air-handling systems AS/NZS 1892Portable ladders 1982.1Part 1:Metal 1715Selection, use and maintenance of respiratory protective devices 1716Respiratory protective devices 2865Safe working in a confined space 3500National plumbing and drainage 3500.1.2Part 1.2: Water supplyAcceptable solut
30、ions 3500.4.2Part 4.2: Hot water supply systems Acceptable solutions 3666Air-handling and water systems of buildingsMicrobial control 3666.1Part 1:Design, installation and commissioning 3666.3Part 3:Performance-based maintenance of cooling water systems SAI/SNZ HB 32Control of microbial growth in ai
31、r-handling and water systems of buildings NZS 4302Code of practice for the control of hygiene in air and water systems in buildings ANSI NFPA 90AInstallation of air conditioning and ventilating systems in buildings 1.5 DEFINITIONS For the purpose of this Standard, the definitions given in AS/NZS 366
32、6.1 and those below apply. 1.5.1 Disinfection The preventive maintenance action of applying a shock treatment to a system, in conjunction with system cleaning, in order to reduce the general concentration of infectious agents. 1.5.2 Emergency decontamination The reduction, to negligible or low conce
33、ntrations, of known high concentrations of a specific contaminant such as Legionella in response to an emergency. 1.5.3 Maintenance That regular routine activity aimed at preserving the operational standard and cleanliness of equipment, which includes inspection, repair, preventive service and clean
34、ing. 1.5.4 Maintenance program The assembly of relevant data and the setting out of a formal strategy and recording system for the effective management of a series of maintenance procedures. 1.5.5 Maintenance report A written communication, giving details of the physical and operational state of a p
35、iece of equipment when maintenance is carried out, which is sent to the building owner or agent. Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS/NZS 3666.2:2002 COPYRIGHT 6 S E C T I O N 2 O P E R A T I O N
36、 A N D M A I N T E N A N C E 2.1 SCOPE This Section sets out minimum requirements for regular routine maintenance. It does not deal with emergency procedures applicable during outbreaks of legionnaires disease. NOTE: Further information on the maintenance of building systems is given in SAA/SNZ HB 3
37、2 and NZS 4302. 2.2 GENERAL 2.2.1 Servicing All plant, equipment and components shall, unless otherwise stated in this Standard, be serviced and maintained in accordance with the suppliers published requirements and best practice. Maintenance shall be carried out by competent personnel as described
38、in Clause 2.6. Maintenance personnel shall follow the site safety and security procedures. Maintenance shall be implemented by the building owner or nominee in accordance with the requirements of this Section, except that alternative maintenance measures may be approved by the regulatory authority.
39、The equipment to be maintained shall be shut down while maintenance is being carried out to prevent particulate matter being passed through the system. Appropriate protective gear complying with the requirements of regulatory authorities shall be worn. Where relevant, the requirements of AS 1470, AS
40、/NZS 1715, AS/NZS 1716 and AS/NZS 2865 shall be complied with. NOTES: 1 Regular cleaning and suitable water treatment are considered to be effective measures as part of a maintenance program for the control of the proliferation of Legionella in cooling water systems. Passivation and water treatment
41、should be fully restored after system flushing, cleaning, disinfection or decontamination. 2 Guidelines for the use of personal protective gear are given in Appendix A. 2.2.2 Precautions when using and storing chemicals All chemical products used, and their labelling, packaging, storage conditions,
42、user instructions, hazardous signage and material safety data sheets shall comply with the requirements of the regulatory authority. NOTE: Care should be taken in the use of biocides, cleaning agents and any other chemicals in equipment such as humidifiers, spray coils and evaporative air cooling eq
43、uipment. Chemicals, when entrained in the airstream, may be hazardous to public health. Suppliers recommendations, including material safety data sheets and other information should be obtained to ensure the proper use of chemicals. 2.2.3 Access for maintenance Easy and safe access for cleaning, ins
44、pection and maintenance shall be available to and about all plant, equipment and components covered in this Section. Relevant requirements of AS 1470, AS 1657, AS/NZS 1892.1 and AS/NZS 2865 shall be complied with. 2.2.4 Provision for maintenance Provision shall be made within the system to facilitat
45、e service and maintenance. Licensed to Marley Temcel Australia on 11 Sep 2003. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS/NZS 3666.2:2002 COPYRIGHT 7 2.3 MAINTENANCE OF AIR-HANDLING SYSTEMS 2.3.1 Air intakes and exhaust outlets Air intakes and exhaust o
46、utlets shall be inspected at least monthly and cleaned, where necessary. 2.3.2 Air filters Where installed, air filters shall be inspected monthly and cleaned or replaced, where necessary, in accordance with Clause 2.6.1. 2.3.3 Humidifiers 2.3.3.1 Steam and spray humidifiers Line strainers, valves,
47、sparge pipes, spray nozzles and components discharging moisture into the airstream shall be inspected monthly and cleaned, where necessary. Associated sensors and controls shall be maintained and calibrated by qualified personnel and operated in accordance with the suppliers requirements. 2.3.3.2 Bo
48、iling and pan-type humidifiers Tanks, trays and discharge devices shall be inspected monthly and cleaned, where necessary. 2.3.4 Evaporative air-cooling equipment The following components shall be inspected at least every three months while the system is in use and maintained as indicated: (a) Sump.
49、 drained and cleaned. (b) Wetted pads . cleaned and replaced when necessary. (c) Water strainer . cleaned when necessary. (d) Air filter, where fittedreplaced. (e) Drainage system .flushed with clean fresh water. Evaporative airconditioning equipment, when not in use for periods greater than one month, shall be drained. NOTES: 1 The bleed-off and the distribution of water over the wetted pads should be checked to ensure effective operation. The water level in the storage sump should be maintained during operation above the ind