1、BRITISH STANDARD BS 7624:2004 Installation and maintenance of domestic direct gas-fired tumble dryers of up to 6 kW heat input (2nd and 3rd family gases) Specification ICS 97.060 BS 7624:2004 This British Standard was published under the authority of Standards Policy and Strategy Committee on 17 Aug
2、ust 2004 BSI 17 August 2004 First published March 1993 Second edition 17 August 2004 The following BSI references relate to the work on this British Standard: Committee reference GSE/30 Draft for Development 01/707909 DC ISBN 0 580 44184 9 Committees responsible for this British Standard The prepara
3、tion 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: Boiler and Radiator Manufacturers Association Ltd British Flue and Chimney Manufacturers Association BSI Consumer Policy Com
4、mittee Catering Equipment Suppliers Association Centrica plc Council for Registered Gas Installers Department of Trade and Industry Health and Safety Executive Heating and Ventilating Contractors Association ICOM Energy Association Institute of Domestic Heating and Environmental Engineers Institutio
5、n of Gas Engineers and Managers LP Gas Association National Association of the Laundrette Industry Society of British Gas Industries Society of Laundry Engineers and Allied Trades Ltd Co-opted members The following body was also represented in the drafting of this standard, through subcommittees and
6、 panels: Kitchen Specialists Association Amendments issued since publication Amd. No. Date CommentsBS 7624:2004 BSI 17 August 2004 i Contents Page Committee responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative References 1 3T e r m s a n d d e f i n i t i o n s 1 4C o m p e t e n c e
7、2 5 Design and planning 2 6 Selection of tumble dryers 3 7 Location of tumble dryers 4 8 Siting and clearance 4 9 Ventilation (air supply) 5 10 Exhaust venting of tumble dryers 5 11 Gas connections 6 12 Restraining devices 7 13 Electrical wiring and connections 7 14 Commissioning 7 15 Information to
8、 be given to the user 8 Bibliography 12 Figure 1 Typical method of stacking a tumble dryer on another appliance using a stacking kit 9 Figure 2 Wall and window vent terminal installations 10 Figure 3 Installation using a typical restraining device 11BS 7624:2004 ii BSI 17 August 2004 Foreword This B
9、ritish Standard has been prepared by Technical Committee GSE/30. It supersedes BS 7624:1993, which is to be withdrawn in November 2004. A period of three months has been allowed for users of the old standard to convert to the new standard. This revision to BS 7624 reflects changes to the relevant le
10、gislation and the publication of BS EN 1458-1:2000, which covers the safety of gas fired tumble dryers and replaces BS 5258-17. The previously accepted use of a tumble dryer in a flueless mode is not recognised in BS EN 1458 and, accordingly, this standard only endorses the venting options detailed
11、in the scope. 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 itself confer immunity from legal obligations. In particular, attention is drawn to the following s
12、tatutory regulations: The Gas Safety (Installation and Use) Regulations 1998 1 The Gas Safety (Installation and Use) (Northern Ireland) Regulations 2004 2 The Gas Appliances (Safety) Regulations 1995 3 The Building Regulations 2000, as amended 4 The Building Standards (Scotland) Regulations 1990, as
13、 amended 5 The Building Regulations (Northern Ireland) 6 The Gas Safety (Application) (Isle of Man) Order 1996 7 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. The BSI copyright notice displayed in
14、this document indicates when the document was last issued.BS 7624:2004 BSI 17 August 2004 1 1 Scope This British Standard specifies the installation (see Note 1) of direct gas-fired tumble dryers of up to 6 kW net heat input burning 2nd and 3rd family gases for use in permanent domestic dwellings (s
15、ee Notes 2 and 3). It applies to any such tumble dryer used in conjunction with a flexible venting hose fitted to a wall or window vent terminal or, where the net heat input does not exceed 3kW, with a venting hose hung out of a window, so that combustion products and moisture are exhausted directly
16、 to the outside air. NOTE 1 For the purposes of this standard, installation includes design, inspection and commissioning. It is recognized that each of these tasks can be performed by the same person. NOTE 2 As well as normally constructed dwellings, domestic premises include any permanently sited
17、caravans, holiday homes, residential park homes and permanently moored boats. Additional requirements exist for these categories of premises and can be found in IGE/UP/8 8. Neither this standard nor IGE/UP/8 8 applies to gas installations in towed or motorised caravans. NOTE 3 Whilst this standard s
18、pecifies installations in domestic premises, it is recognized that it might also be referred to for similar installations in commercial and industrial premises. In such cases, additional legislation might be applicable. Attention is drawn to the hazards that exist in certain locations, e.g. hairdres
19、sing salons, where the atmosphere or drying load can contain flammable vapours. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the re
20、ferenced document (including any amendments) applies. BS 669-1, Flexible hoses, end fittings and sockets for gas burning appliances Part 1: Specification for strip-wound metallic flexible hoses, covers, end fittings and sockets for domestic appliances burning 1st and 2nd family gases. BS 5440-2:2000
21、, 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 5482-1, Domestic butane- and propane-gas burning installations Pa
22、rt 1: Specification for installations at permanent dwellings. BS 6891, Specification for installation of low pressure gas pipework of up to 28 mm (R1) in domestic premises (2nd family gas). BS 7671, Requirements for electrical installations The IEE Wiring Regulations. 3 Terms and definitions For the
23、 purposes of this British Standard, the following terms and definitions apply. 3.1 appliance flexible connector pipe with appropriate connector ends, designed to have a considerable degree of flexibility to facilitate the connection of a gas appliance to an installation pipe and allow the appliance
24、to be moved a short distance without the need for disconnection BS 669-1 3.2 direct gas-fired tumble dryer appliance in which textile material is dried by tumbling in a rotating drum through which heated air and products of combustion are forced or induced by mechanical means NOTE Hereafter referred
25、 to as tumble dryer. 3.3 exhaust venting process of removing moist air, including the products of combustion and lint, from a tumble dryer directly to the outside airBS 7624:2004 2 BSI 17 August 2004 3.4 heat input quantity of energy used in unit time corresponding to the volumetric or mass flow rat
26、es, the calorific value used being the net or gross calorific value BS EN 778:1998 and BS EN 1319:1999 NOTE Heat inputs in this document are based on net calorific value. 3.5 ventilation process of supplying fresh air to, and/or removing air from a room, internal space, compartment or garage 3.6 ven
27、tilation air air that may be used or intended to be used for purposes of combustion, cooling and/or exhaust venting of an appliance 4 Competence Persons who carry out the work shall be competent. The installation work shall be carried out by a business or self-employed person, who is a “member of a
28、class of persons” approved for the time being by the Health and Safety Executive (HSE), as required by the Gas Safety (Installation and Use) Regulations 1. Persons who design the installation shall have a knowledge and understanding of the standards and regulations that apply to ensure that the comp
29、leted plans will produce a safe and satisfactory installation. COMMENTARY AND RECOMMENDATIONS ON CLAUSE 4 At the time of publication, the body with HSE approval to operate and maintain a register of businesses who are members of a “class of persons” is the Council for Registered Gas Installers (CORG
30、I). Therefore, it is essential that all businesses or self-employed gas installers are registered with CORGI. Guidance on the individual competency required for gas work are those who, either hold a certificate of gas safety competence acceptable to CORGI which include (without limitation) the Accre
31、dited Certification Scheme (ACS) and/or the Gas Services S/NVQ that has been aligned to ACS. 5 Design and planning The following shall be ascertained before planning of the installation begins: a) the availability of gas supplies; b) the availability of adequate ventilation; c) the position of the p
32、roposed location of the tumble dryer in relation to doors, external walls (outside air) and to the probable position of fixtures, furniture and curtains; d) the electrical supplies available; e) the recommended method of installation given in the tumble dryer manufacturers literature; f) the availab
33、ility of a stable and rigid base for the tumble dryer; and g) the most appropriate method of exhaust venting. COMMENTARY AND RECOMMENDATIONS ON CLAUSE 5 Collaboration is essential between those concerned with the design of a tumble dryer installation and those responsible for installing the tumble d
34、ryer, both at the planning stage and during the execution of the work. BS 7624:2004 BSI 17 August 2004 3 6 Selection of tumble dryers Any new tumble dryer shall be one that has been marked by the manufacturer as being suitable for the gas with which it is to be supplied. It shall be suitable for its
35、 intended location (see Clause 7). Only used tumble dryers with which the manufacturers instructions are supplied or are otherwise available shall be selected for installation. COMMENTARY AND RECOMMENDATIONS ON CLAUSE 6 The drying load capacity of the tumbler dryer should be borne in mind during sel
36、ection together with the intended location and the method of ventilation (see Clause 9) and exhaust venting (see Clause 10). Tumble dryers covered by this standard are generally available with a range of accessories, e.g. exhaust venting hose, wall/window vent kit, stacking kit and restraining kit.
37、Some of these items, for example, a vent hose, can be included with the tumble dryer. Tumble dryers covered by this standard are available with rated heat inputs up to 6 kW. The input is quoted on the basis of net calorific value. The traditional UK system of using gross calorific value would give a
38、n equivalent rating of 6.6 kW input for natural gas. The installer should check the data given with a tumble dryer to establish the basis on which the heat input is quoted. It should be noted that the heat input of the dryer determines which exhaust venting options are available for installation (se
39、e Clause 9). For the purposes of this standard the ratio of gross:net heat input is 1:1.11. For example, to convert a 5kW input appliance, gross c.v. to the equivalent net c.v. heat input: 5/1.1 = 4.504 kW heat input. New tumble dryers Of the tumble dryers covered by this standard, new tumble dryers
40、 fall within the scope of the European Gas Appliances Directive 9, implemented in the UK by the Gas Appliances (Safety) Regulations 3, which require new tumble dryers to be CE marked. Accordingly, installers should check that the tumble dryer is CE marked. Normally, a tumble dryer is certified to BS
41、 EN 1458-1, which classifies flue types as B 22Dand B 23D . The installer should check that the packaging and the dryers data plate are marked with at least the following information. a) The letters “GB”. b) The type of gas and appliance inlet pressure as follows: 1) for a tumble dryer adjusted for
42、natural gas, “G20 and/or natural gas 20 mbar” plus the designation I 2H; 2) for a tumble dryer adjusted for butane, “G30 and/or butane 29 mbar” plus the designation I 3B; 3) for a tumble dryer adjusted for propane, “G31 and/or propane 37 mbar” plus the designation I 3P; 4) for a tumble dryer which w
43、ill burn butane or propane gas at the correct pressure, “G30/G31 and/or butane/propane 29/37 mbar” plus the designation I 3+ . Where a tumble dryers data plate carries the letters CAT I or CAT II followed by the gas type designations, (i.e. 2H, 2P, 2B ) then the tumble dryer may be used for differen
44、t types of gases when adjusted to do so. In such a case, the installer should ensure that the tumble dryer is correctly adjusted. Used tumble dryers In the case of a used tumble dryer, the original packaging is generally not available. Where the manufacturers instructions are not available, these sh
45、ould be obtained from the manufacturer or his agent before installation of the tumble dryer begins. Where a used tumble dryer carries the “CE” mark, its data plate is likely to carry the information on type of gas and appliance inlet pressure. In such a case, the installation should proceed in accor
46、dance with the manufacturers instructions, using the venting options specified in this standard.BS 7624:2004 4 BSI 17 August 2004 Where the tumble dryer does not carry a “CE” mark, it has to be borne in mind that other criteria could apply, such as surface temperatures, tumble dryer stability, venti
47、lation, etc., and these need to be taken into account in the method of installation. The installer should satisfy himself that the tumble dryer is safe in construction and condition, and can be used without constituting a danger. A tumble dryer conforming to BS 5258-17 may be considered safe when in
48、stalled in accordance with the venting options specified in this standard. All tumble dryers In all cases, the installer should refer to the data plate and/or take other steps to ensure that the tumble dryer is suitable for the pressure and type of gas to be burnt. Conversion to another gas, if nece
49、ssary, should be carried out strictly in accordance with the manufacturers instructions, using the manufacturers kit of parts. If there is any doubt as to the suitability of a tumble dryer for a particular gas, then the tumble dryer manufacturer should be consulted. Further information on the labelling of gas appliances is given in DD 221. 7 Location of tumble dryers 7.1 The tumble dryer shall be installed in accordance with the manufacturers instructions.
