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1、BRITISH STANDARD BS 6798:2000 Incorporating Amendment No. 1 Specification for installation of gas-fired boilers of rated input not exceeding 70 kW net ICS 91.140.10 ? Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:52:21 GMT+00:00 2007, Uncontrolled Copy, (c)
2、 BSI BS 6798:2000 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 BSI 18 October 2005 First published, as CP 332.303 and subsequently renumbered C
3、P 332-2, June 1951 Second edition August 1964 Third edition, as BS 5376-2, July 1976 Fourth edition, as BS 6798, April 1987 Fifth edition August 2000 The following BSI references relate to the work on this British Standard: Committee reference GSE/30 Draft for comment 98/706151 DC ISBN 0 580 33208 X
4、 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GSE/30, Gas installations (1st, 2nd and 3rd family gases), upon which the following bodies were represented: BG plc British Flue and Chimney Manufacturers Association Centr
5、ica Combustion Engineers Association Consumer Policy Committee of BSI Council for Registered Gas Installers Department of Trade and Industry Gas Consumers Council Health and Safety Executive Institute of Domestic Heating and Environmental Engineers Institution of Gas Engineers Liquified Petroleum Ga
6、s Industry Technical Association Society of British Gas Industries Co-opted members Amendments issued since publication Amd. No.DateComments 1490818 October 2005 See foreword Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:52:21 GMT+00:00 2007, Uncontrolled C
7、opy, (c) BSI BS 6798:2000 BSI 18 October 2005 i Contents Page Committees responsibleInside front cover Forewordii 1Scope 1 2Normative references 1 3Terms and definitions 2 4Selection of equipment and pre-installation 3 4.1Exchange of information and planning 3 4.2Selection of boiler 4 4.3Condensing
8、boilers 5 4.4Materials and components 13 4.5Location 14 4.6Boiler rating 14 5Installation 14 5.1Air supply for combustion and ventilation 14 5.2Flue system 14 5.3Installation and location 15 5.4Protection 19 5.5Gas supplies and pipework 21 5.6Electricity supplies and wiring 22 5.7Water supplies and
9、pipework 22 6Post-installation 24 6.1Inspection 24 6.2Commissioning 24 6.3Advice to user 25 Annex A (informative) CORGI registration and competency 26 Bibliography 27 Figure 1 Connection of condensate drainage pipe to soil and vent stack 9 Figure 2a) Connection of a condensate drainage pipe downstre
10、am of a sink waste trap 10 Figure 2b) Connection of a condensate drainage pipe upstream of a sink waste trap 11 Figure 3 External termination of condensate drainage pipe 12 Figure 4 Example of a purpose-made soakaway 13 Figure 5 Flue pipe clearances 17 Licensed Copy: London South Bank University, Lo
11、ndon South Bank University, Fri Mar 02 00:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 6798:2000 ii BSI 18 October 2005 Foreword This British Standard has been prepared by Technical Committee GSE/30. It supersedes BS 6798:1987, which is withdrawn. The start and finish of text introduced or al
12、tered by Amendment No. 1 is indicated in the text by tags !“. The structure has been modified to follow the systematic approach used in other gas installation standards. Requirements, with corresponding commentary and recommendations, are organized under the main headings of equipment selection and
13、pre-installation, installation, and post-installation. The requirements of this specification are supported by recommendations. To comply with this specification, it is necessary to comply with all its requirements. The installer may depart from recommendations, but would be expected to have good re
14、asons for doing so. This standard allows manufacturers instructions to specify a method of installation, testing, commissioning or maintenance which differs in points of detail from this standard. This reference to manufacturers instructions is allowed only where it will result in at least an equiva
15、lent level of safety. In such circumstances, it is important that the manufacturers instructions are followed. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of it
16、self confer immunity from legal obligations. Attention is drawn to the following statutory regulations. The regulations may be amended from time to time, and whichever regulations are in force at the time an installation is carried out are to be complied with. The commentary in this British Standard
17、 reflects the state of the regulations in 2005. a) The Gas Safety (Installation and Use) Regulations 1. These control all aspects of the ways gas-fired systems are installed, maintained and used, mainly in domestic premises, and the classes of persons who may undertake gas work. b) Building regulati
18、ons (for the appropriate legislative region). These control work carried out in the construction of new buildings or the extension of existing buildings. Detailed advice for England and Wales is given in approved documents 2, and for Northern Ireland, in technical booklets 3. The Building (Scotland)
19、 Regulations 2004 4 are functional Regulations and detailed guidance on these Regulations, with regard to the environment, is given in the Technical Handbook for domestic application, section 3 4a. c) The Water Supply (Water fittings) Regulations 1999 (as amended) 5 or relevant Byelaws. d) The Healt
20、h and Safety at Work etc. Act 1974 (as amended) 6. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 27 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: London Sou
21、th Bank University, London South Bank University, Fri Mar 02 00:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 6798:2000 BSI 18 October 2005 1 1 Scope This British Standard specifies requirements for the selection, installation, inspection and commissioning of gas-fired boilers for central heat
22、ing and other purposes, which have a total rated heat input not exceeding 70 kW, based on net calorific value. This includes cookers with integral boilers used to provide central heating. It applies to boilers utilizing 1st, 2nd or 3rd family gases designed to operate in the condensing or non-conden
23、sing mode for the heating of domestic or commercial premises by the circulation of heated water in open or closed systems. This standard does not apply to boilers with a rated input of over 70 kW, nor to groups of boilers with individual ratings of 70 kW or less but with aggregate inputs of over 70
24、kW as specified in BS 6644. It does not cover the detailed design and installation of the whole heating system, which is specified in BS 5449. NOTE 1 The installation of boilers with a rated input greater than 70 kW is covered by BS 6644. Additional requirements for the installation of back boiler u
25、nits are described in BS 5871-1. This standard applies to boilers which carry a CE mark and also to used boilers which do not carry the CE mark (see 4.2.1). NOTE 2 In this standard, heat input is expressed in terms of net calorific values (CV), unless stated otherwise. The ratio of gross to net heat
26、 input is approximately 1.11 : 1 for natural gas, 1.09 : 1 for propane, and 1.08 : 1 for butane. NOTE 3 It is essential that persons carrying out the installation of any gas appliance be competent to do so. Annex A gives information about the legal requirements which relate to approved installers of
27、 gas appliances. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated ref
28、erences, the latest edition of the publication referred to applies. BS 476-22, Fire tests on building materials and structures Part 22: Methods for determination of the fire resistance of non-loadbearing elements of construction. BS 1179:1967, Glossary of terms used in the gas industry. BS 1179-6:19
29、80, Glossary of terms used in the gas industry Part 6: Combustion and utilization including installation at consumers premises. BS 4814, Specification for expansion vessels using an internal diaphragm, for sealed hot water heating systems. BS 5422:1990, Method for specifying thermal insulating mater
30、ials on pipes, ductwork and equipment (in the temperature range p40 C to +700 C). BS 5440-1, Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family gases) Part 1: Specification for installation and maintenance of flues
31、. BS 5440-2, Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW (1st, 2nd and 3rd family gases) Part 2: Specification for installation and maintenance of ventilation for gas appliances. BS 5449, Specification for forced circulation hot water c
32、entral heating systems for domestic premises. BS 5482-1, Domestic butane- and propane-gas-burning installations Part 1: Specification for installations at permanent dwellings. BS 5482-2, Domestic butane- and propane-gas-burning installations Part 2: Installations in caravans and non-permanent dwelli
33、ngs. BS 5482-3, Domestic butane- and propane-gas- burning installations Part 3: Installations in boats, yachts and other vessels. BS 5970, Code of practice for thermal insulation of pipework and equipment (in the temperature range p100 C to +870 C). BS 6283-1, Safety and control devices for use in h
34、ot water systems Part 1: Specification for expansion valves for pressures up to and including 10 bar. Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 6798:2000 2 BSI 18 October 2005 BS 6700, Specification fo
35、r design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages. BS 6759-1, Safety valves Part 1: Specification for safety valves for steam and hot water. BS 6891, Specification for installation of low pressure gas pipework of up to
36、28 mm (R1) in domestic premises (2nd family gas). BS 7671, Requirements for electrical installations. IEE Wiring Regulations. Sixteenth edition. IGE/UP2, Gas installation pipework, boosters and compressors in industrial and commercial premises.1) 3 Terms and definitions For the purposes of this Brit
37、ish Standard, the terms and definitions given in BS 1179:1967 and BS 1179-6:1980 apply, together with the following. 3.1 boiler compartment enclosure specifically designed or adapted to house one or more gas boilers, and which is not a habitable space 3.2 combination boiler boiler designed to provid
38、e domestic hot water and hot water for central heating without the need for additional secondary storage NOTE A combination boiler may include primary or secondary storage. 3.3 condensing boiler boiler designed to make use of the latent heat in the combustion products by condensing water vapour with
39、in the appliance 3.4 flue pipe pipe which conveys products of combustion from a boiler to a discharge terminal !3.4a greywater “water originating from the mains potable water supply that has been used for bathing or washing, washing dishes . . . or laundering clothes1a)“ 3.5 hot water storage combin
40、ation unit either: a) hot-water storage vessel with a cold water feed cistern immediately above it, the two being fabricated together as a compact unit; or b) hot-water storage vessel with a cold water feed cistern beside it or inside it. 3.6 installer person who installs, commissions, services or m
41、aintains a gas-fired central heating boiler 3.7 open-flued boiler boiler designed to be connected to an open-flue system, its combustion air being drawn from the room, space or enclosure in which it is installed NOTE This type of boiler is designated as “type B” in !PD CR 1749:2001.“ 1)!Footnote del
42、eted“ 1a) ! Definition from Water Regulations Advisory Scheme publication, Reclaimed Water Systems. Information about Installing, Modifying or Maintaining Reclaimed Water Systems (No 9-02-04) 6a.“ Licensed Copy: London South Bank University, London South Bank University, Fri Mar 02 00:52:21 GMT+00:0
43、0 2007, Uncontrolled Copy, (c) BSI BS 6798:2000 BSI 18 October 2005 3 3.8 open system central heating system incorporating a water circuit that is open to the atmosphere through a feed cistern and an open vent pipe or via a combined feed and vent pipe 3.9 rated output the useful output stated by the
44、 manufacturer 3.10 room-sealed boiler boiler whose combustion system is sealed from the room in which the boiler is located and which obtains air for combustion from a ventilated uninhabited space within the premises, or from the open air outside the premises, and which vents the products of combust
45、ion directly to open air outside the premises NOTE This type of boiler is designated as “type C” in !PD CR 1749:2001.“ 3.11 sealed system central heating system incorporating a water circuit that is not open to the atmosphere 4 Selection of equipment and pre-installation 4.1 Exchange of information
46、and planning Those concerned with the selection of the boiler and the design of the system shall collaborate with the installer, both at the planning stage and during the execution of the work. COMMENTARY AND RECOMMENDATIONS ON 4.1 General Liaison between the various trades carrying out the work is
47、essential for a safe and efficient gas boiler installation. New work Particular matters that should be considered when carrying out new installations are: a) the availability of gas, electrical and water supplies; b) the heat requirements (see 4.5); c) the physical size, design and position of the b
48、oiler, and its relationship to structural support and to combustible materials; NOTE Some installations will involve preliminary structural work which needs to be completed at the building carcass stage. Suitable bases will be required for floor-standing boilers. d) the type of building, form of con
49、struction (e.g. timber framed), and the probable position of fixtures, furniture and curtains; NOTE Information on gas installations in timber-framed housing is given in IGE/UP7 7. e) the size, height, type and route of the flue, and the position of termination, including the possible consequences of any pluming, together with the materials of construction; NOTE Suitable apertures or openings may be required for connection to a buil
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