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1、BRITISH STANDARD This Standard is confirmed. See the BSI Catalogue for details. June 1998 BS 7566-4:1992 Incorporating Corrigendum No. 1 Installation of factory-made chimneys to BS 4543 for domestic appliances Part 4: Recommendations for installation design and installation Licensed Copy: London Sou
2、th Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 This British Standard, having been prepared under the direction of Technical Committee B/506, was published under the authority of the Standards Board and comes into effect
3、 on 15 July 1992 BSI 18 March 2003 The following BSI references relate to the work on this standard: Committee reference B/506/5 Draft for comment 89/13385 DC ISBN 0 580 20583 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Commi
4、ttee B/506, Chimneys, to Subcommittee B/506/5, Chimneys and their components having inner linings of metal, upon which the following bodies were represented: Association of British Solid Fuel Appliances Manufacturers British Coal Corporation British Combustion Equipment Manufacturers Association Bri
5、tish Flue and Chimney Manufacturers Association British Gas plc British Precast Concrete Federation Ltd. British Steel Industry Building Services Research and Information Association Clay Pipe Development Association Limited Department of the Environment Department of the Environment (Construction D
6、irectorate) Health and Safety Executive Institute of Domestic Heating and Environmental Engineers National Association of Plumbing, Heating and Mechanical Services Contractors National Federation of Master Steeplejacks and Lightning Conductor Engineers National House-building Council The following b
7、odies were also represented in the drafting of the standard, through subcommittees and panels: Department of the Environment (Building Research Establishment) Institute of Vitreous Enamellers Real Fire Association Society of British Gas Industries Vitreous Enamel Development Council Amendments issue
8、d since publication Amd. No.DateComments 14210 Corr. No. 1 18 March 2003Change to 9.1 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 BSI 18 March 2003 i Contents Page Committees responsibleInsid
9、e front cover Forewordii 1Scope1 2Definitions1 3Openings into chimney flue1 4Distance from combustible matter2 5Stability of exposed sections4 6Weatherproofing4 7Chimney flue outlets4 8Flue pipe materials4 9Cleaning and maintenance5 10Lightning protection5 Appendix A Chimney design for fireplaces ha
10、ving non-standard openings6 Figure 1 Typical installations showing standard items3 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 ii BSI 18 March 2003
11、 Foreword This British Standard has been prepared under the direction of Technical Committee B/506 Chimneys, and together with Parts 1 to 3 of BS 7566 supersede BS 6461-2:1984 which is withdrawn. This Part of BS 7566 covers the installation of factory-made chimneys complying with the requirements of
12、 BS 4543. Masonry chimneys are covered by BS 6461-1:1984. BS 7566 is published in separate Parts in an attempt to highlight the interfaces involved in the successful specification, design and installation of factory-made chimneys. Part 1 of BS 7566 gives a method of specifying the information which
13、should be supplied by the purchaser to the installation designer. Part 2 of BS 7566 specifies design instructions to be followed by the installation designer to take account of the purchasers requirements and relevant standards, when developing an acceptable chimney design for the particular applica
14、tion. Part 3 of BS 7566 specifies installation practices which are to be followed in order to ensure that the designers intentions are satisfactorily realized and which reflect good site supervision and working practices. This Part of BS 7566 gives guidance to the purchaser, designer and installer o
15、n the options which have to be identified and the methods of achieving specified requirements in a manner that will ensure a safe and satisfactory installation. It also gives important guidance on matters such as maintenance and cleaning. This publication does not purport to include all the necessar
16、y provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover. T
17、he BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 BSI 18 March 2003 1 1 Scope This Part of BS 7566 gi
18、ves guidance on the installation design and installation of factory-made chimneys complying with BS 4543. It also gives information on cleaning and maintenance of the chimney following installation. 2 Definitions For the purposes of this Part of BS 7566 the definitions given in BS 4543-1 apply. 3 Op
19、enings into chimney flue 3.1 General Where it is not possible to clean or inspect the chimney through the appliance it will be necessary to provide an opening into the chimney. This may be achieved by the use of an inspection length or a tee piece, from the chimney manufacturers standard range (eith
20、er 90? or 135? angle) (see Figure 1). It may also be necessary to provide openings for: a) access for cleaning and maintenance; b) control of draught and the installation of a draught stabilizer; c) use of instrumentation in the assessment of the appliance performance. 3.2 Locations 3.2.1 Open fire
21、For open fire installations access for cleaning and inspection is readily available through the fireplace opening. It is desirable where a chimney serving an open fireplace installation includes an offset that a means of access for cleaning and inspection is provided above the offset. 3.2.2 Debris t
22、rap An opening for removal of debris or drainage should be through the base of a tee-piece section. This may also be needed as access for cleaning and inspection of any vertical section of chimney. It is important that this specially manufactured opening from the manufacturers standard range is fitt
23、ed with a lockable, sealable closure which may be in the form of a plug or cap (see Figure 1, item K or A). 3.2.3 Tee-piece Any tee-piece, with its associated opening, should be sited so as to allow for the introduction of a sweeps brush and to provide easy access for inspection (see Figure 1, item
24、H). 3.2.4 Inspection sections Where monitoring is needed an inspection section incorporating the necessary probe holes on the closure plate should be incorporated in the chimney design. Insulated chimney sections should not be drilled or modified to provide access for monitoring equipment necessary
25、to check the performance of any appliance. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 2 BSI 18 March 2003 4 Distance from combustible matter A chimney complying with BS 4543 will include som
26、e form of insulation in its design and manufacture. However, when used in a confined space the outside surface of the chimney may become hot. BS 4543 requires the chimney manufacturer to specify a separation distance from the outside surface of the chimney to any combustible matter. This distance is
27、 referred to in BS 4543-1 as the manufacturers specified distance X mm. NOTEThe specified distance X mm is usually 50 mm. The chimney system manufacturers standard components include items such as fire-stops/spacers, which maintain this specified distance when the chimney passes through a floor or r
28、oof construction. Where the chimney passes through a room or roof space, the chimney should be protected to prevent the accidental placing of combustible material within the specified distance X mm. This requirement is equally applicable where the chimney passes through an enclosure used as a storag
29、e cupboard. A typical enclosure construction is wood studding with a 12 mm thick plasterboard and 3 mm plaster skim. It is important to maintain the specified distance X mm between the wood studding and the chimney. This enclosure should incorporate a removable panel to permit access for inspection.
30、 In a loft space a wire mesh enclosure may be sufficient to prevent accidental contact from stored materials or the encroachment of loft insulation materials within the specified distance X mm. The mesh size should be small enough to prevent the passage of loft insulation. It is essential that the s
31、pecified distance X mm be maintained as an air gap and no attempt should be made to introduce insulating materials around the surface of the chimney. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:19
32、92 BSI 18 March 2003 3 Notes to Figure 1 The items shown in the figure are as follows. Item A. Inspection length from manufacturers standard range This inspection opening may be used for cleaning and inspection when sited above an offset or above an appliance where there is no provision for flue cle
33、aning through the appliance. Positioned above an appliance this section would permit the installation of a draft, stabilizer, if required. Item B. Chimney enclosure (solid) Plasterboard on studding set to maintain the manufacturers specified distance X mm, as established in BS 4543-1. Item C. Chimne
34、y enclosure (open) Wire mesh on a rigid frame set to maintain the manufacturers specified distance X mm and prevent accidental contact from stored materials or loft insulations, etc. Item D. Chimney support/load bearing plate from manufacturers standard range Chimney support is used to prevent the c
35、himney weight being supported by the appliance. Item E. Tee-piece 90?C insulated chimney tee-piece section from manufacturers standard range used to connect flue pipe from back outlet appliance where access is available to debris trap. Item F. Flue pipe connector Flue pipe connector from back outlet
36、 appliance, not greater than 150 mm in length. Only suitable where there is adequate access for cleaning and maintenance. Item G. Flue pipe connector Flue pipe connector from top outlet appliance incorporating a cleaning eye. Where a draft stabilizer is required, it should be fitted on the flue pipe
37、 connector Item H. Tee-piece 135? insulated chimney tee-piece section from manufacturers standard range, used as change of direction piece. Item I. Short section Insulated chimney short section from manufacturers standard range used to take chimney route through internal wall. Item J. Sleeving Sleev
38、ing supplied by the chimney manufacturer to give uninterrupted clearance around the chimney for expansion. Item K. Debris trap Insulated chimney section fitted with inspection cleaning plate or opening, for removal of debris and other cleaning purposes. This section may be fitted with a drainage poi
39、nt. Figure 1 Typical installations showing standard items Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:48:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7566-4:1992 4 BSI 18 March 2003 5 Stability of exposed sections Where the chimney projects above the
40、point of intersection with the roof, external lateral supports may be required. These supports should be fixed in accordance with the manufacturers instructions. In the absence of manufacturers recommendations where the chimney projects more than 1.8 m, external lateral supports should be provided.
41、Additional external lateral support may also be necessary for chimneys in areas prone to high winds (e.g. coastal areas and exposed high ground) as well as installations with a square shaped weathering/cladding which will have higher wind resistance than a round shape. TV and radio aerials should no
42、t be attached to the chimney system. 6 Weatherproofing Where the chimney manufacturers preformed weatherproofing is provided the angle of the roof slope should be determined and only the correct manufacturers component used for such purpose. Where plumbers weatherproofing is manufactured on site, th
43、e roof slate and upstand should be designed and formed to suit the particular slope and application by agreement with the chimney manufacturer. The weatherproofing, or roof slate and upstand, should be made of any non-combustible material and of a slate size to match the roof slates or tiles. NOTEPr
44、oprietary flexible and adjustable roof slates commonly used on vent pipes are not considered suitable for use with solid fuel burning appliances. 7 Chimney flue outlets 7.1 General Rain caps are not recommended for use on solid fuel installations. Their presence will. increase flow resistance and th
45、eir upper surfaces, exposed to ambient conditions, provide chilled surfaces that encourage the formation of aggressive condensates. An unimpeded exhaust encourages good plume rise. In some instances, a terminal incorporating a spark guard may be demanded to reduce fire hazard. In such cases, regular
46、 cleaning is essential to prevent accumulation of material which could ignite and create a greater hazard than would be realized if no such device were used. For oil burning installations, a rain cap may be included; again there is a considerable corrosion risk and regular inspection is recommended.
47、 For gas burning installations, a flue terminal is required and this should comply with section 5 of BS 715:1989. Flue terminal devices can be used to provide noise attenuation, generally where wind aspiration effects are causing annoyance. Where a flue terminal is used, consideration should be give
48、n to the need for ease of removal to allow for cleaning and inspection. 7.2 Anti-downdraught terminals The use of so-called anti-downdraught terminals is not recommended. 8 Flue pipe materials All materials and components used have to comply with the relevant British Standard given in Appendix A of
49、BS 7566-2:1992. The types of flue pipe materials listed have either been shown to be satisfactory in use over a long period of time or have been subjected to a programme of tests for performance given in the relevant British Standards. Where materials, systems or components other than those listed are recommended as suitable, the designer should establish the ability to maintain the long-term integrity of the flue pipe, the resistance to acid attack and the ability to withstand temperatures up to 1 100?C. Licensed Copy: London South Ba