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1、BRITISH STANDARD BS 5258-12: 1990 Incorporating Amendment No. 1 Safety of domestic gas appliances Part 12: Specification for decorative fuel effect gas appliances (2nd and 3rd family gases) Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、5258-12:1990 This British Standard, having been prepared under the direction of the Gas Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1990 BSI 03-1999 First published January 1980 Second edition November 1990 The following BSI
3、references relate to the work on this standard: Committee reference GSE/17 Draft for comment 88/73893 DC ISBN 0 580 18930 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Gas Standards Policy Committee (GSE/-) to Technical Committee GSE
4、/17, upon which the following bodies were represented: Association for Consumer Research (ACRE) British Gas plc British Non-ferrous Metals Federation Consumer Policy Committee of BSI Department of Energy (Energy Efficiency Office) Department of the Environment (Construction Directorate) Department o
5、f Trade and Industry (Consumer Safety Unit, CA Division) Gas Consumers Council Institution of Gas Engineers Liquefied Petroleum Gas Industry Technical Association (UK) National Caravan Council Limited Royal Society for the Prevention of Accidents Society of British Gas Industries The following bodie
6、s were also represented in the drafting of the standard, through subcommittees and panels: Coopted member Decorative Gas Fire Manufacturers Association Amendments issued since publication Amd. No.DateComments 7507January 1993Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldu
7、n, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 BSI 03-1999i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1 Scope 1 2 Definitions 1 3 Classification of appliances 2 4 General requirements 2 5 General conditions of test 2
8、 Section 2. Safety requirements and associated methods of test 6 General design and construction 4 7 Gas soundness 5 8 Heat input5 9 Combustion 6 10 Ignition 7 11Ignition system 8 12 Flame stability 9 13 Sooting 10 14 Flue systems 11 15 Fire hazard and limiting temperatures 14 16 Cyclic use test 16
9、17 Manual controls 17 18 Automatic controls 18 19 Electrical safety 19 20 Users instructions 19 21 Installation and servicing 19 Appendix A Construction of test box and flue 23 Appendix B Calculation of reference gas heat input 28 Appendix C Determination of clearance flue flow 28 Figure 1 Illustrat
10、ions of fuel effect appliances 2 Figure 2 Bubble leak indicator 5 Figure 3 Basic test box 12 Figure 4 Apparatus for the assessment of resistance to debris accumulation13 Figure 5 Collecting hood 15 Figure 6 Collecting hood positioning 17 Figure 7 Apparatus for measuring floor temperatures 20 Figure
11、8 Removable inserts 23 Figure 9 Test box assembly 25 Figure 10 Test flue 26 Figure 11 Sampling probe 27 Publication(s) referred to 30 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 ii BSI 03-1999 Foreword This revision of BS
12、 5258-12 has been prepared under the direction of the Gas Standards Policy Committee and supersedes BS 5258-12:1980 which is withdrawn. In both format and requirements it follows closely the first edition but whereas that was written with type approval in mind, this revision will apply to all produc
13、tion appliances through a recognized scheme of quality assurance. Important technical changes introduced in this revision include an extension of the location requirements to ensure adequate safety in the absence of a fireguard, an improved test for the clearance of combustion products and a new tes
14、t to take account of the accumulation of chimney debris. Controls requirements have been extended and now make reference to appropriate British Standards. Unlike BS 5258-12:1980 this revision makes no provision for the acceptance of new designs, materials or methods of assembly as equivalent to thos
15、e specified nor does it provide for new features to be checked against manufacturers claims. This omission is not intended to inhibit innovation; such provisions are considered more appropriate to the conditions of a certification scheme. Since 1980, many relevant codes of practice have been revised
16、 and published as new British Standards, some having been revised as installation specifications. At present the appropriate British Standards covering the installation of decorative fuel effect gas appliances are BS 5440-1 and BS 5440-2, BS 5482-1 and BS 5482-2 and BS 67141). Attention is drawn to
17、the requirements of the Gas Safety (Installation and Use) Regulations, Low Voltage Electrical Equipment (Safety) Regulations 1989, Heating Appliances (Fireguard) Regulations and various Building Regulations. The following Parts of BS 5258 are already published or, as indicated by footnote 2, in prep
18、aration: Part 1: Central heating boilers and circulators; Part 2: Cooking appliances (obsolescent); Part 4: Fanned-circulation ducted-air heaters; Part 5: Specification for gas fires; Part 6: Refrigerators and food freezers; Part 7: Storage water heaters; Part 8: Combined appliances: gas fire/back b
19、oiler; Part 9: Combined appliances: air heater/circulator; Part 10: Flueless space heaters (excluding catalytic combustion heaters) (3rd family gases); Part 11: Flueless catalytic combustion heaters (3rd family gases); Part 13: Specification for convector heaters; Part 14: Specification for barbecue
20、s (3rd family gas); Part 15: Specification for combination boilers; Part 16: Specification for inset live fuel effect gas fires (2nd and 3rd family gases)2). 1) It is envisaged that BS 6714 will be revised as BS 5871-3. 2) In preparation. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:
21、34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 BSI 03-1999iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself conf
22、er immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 30, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
23、 in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 BSI 03-199
24、91 Section 1. General 1 Scope This Part of BS 5258 specifies safety requirements and describes associated methods of test for 2nd and 3rd family decorative fuel effect gas appliances that are designed to visually simulate solid fuels and are designed to be installed within a builders opening and/or
25、fireplace recess. In specifying requirements for appliances burning 2nd family gases, it is assumed a meter governor will be fitted and for appliances burning 3rd family gases it is assumed that the gas supply from the container will be governed by a pressure regulator complying with BS 3016. The re
26、quirements for controls relate to controls fitted as part of, or supplied with, particular appliances; they do not necessarily provide a complete specification for controls intended for general use. This Part of BS 5258 is not applicable to: a) decorative fuel effect gas appliances having a rated he
27、at input exceeding 15 kW; b) inset live fuel effect gas fires which are the subject of BS 5258-16. NOTE 1This specification contains requirements relating to the guarding of the appliance but it should be noted that the Heating Appliances (Fireguards) Regulations (Statutory Instrument 2106:1973) are
28、 subject to government review. NOTE 2The titles of the publications referred to in this standard are listed on the page 30. 2 Definitions For the purposes of this Part of BS 5258 the definitions given in BS 1179:1967, BS 1179-6 and in the relevant British Standard codes of practice apply, together w
29、ith the following. 2.1 adjustment pressure the pressure in the hot condition, measured at the appliance test point (see 21.4), that is required to obtain the rated heat input using the reference test gas 2.2 builders opening the enclosure constructed by the builder to accommodate fireplace component
30、s 2.3 cold condition a condition of the appliance required for some tests and obtained by allowing the unlit appliance to attain equilibrium at room temperature 2.4 decorative fuel effect gas appliance an appliance designed to simulate a solid fuel appliance primarily for decorative purposes and int
31、ended to be installed so that the products of combustion pass unrestricted from the firebed to the chimney or flue see Figure 1(a) 2.5 fireplace opening the aperture formed in the face of the builders opening, the fireplace recess or fire surround, if fitted 2.6 fireplace recess the recess formed by
32、 the inclusion of fireplace components in the builders opening 2.7 hot condition a condition of the appliance required for some tests and obtained by heating the appliance for 1 h at the adjustment pressure, any thermostat remaining fully open 2.8 inset live fuel effect gas fire an appliance designe
33、d to simulate a solid fuel appliance and intended to be installed so that the passage of the products of combustion from the firebed to the chimney or flue is restricted by the appliance such that air enters the fireplace only through purpose-designed openings see Figure 1(b) 2.9 manufacturers recom
34、mended setting pressure the pressure, measured at the appliance test point (see 21.4), that is specified by the manufacturer for the purpose of adjusting the appliance heat input 2.10 pan burner a burner which utilizes a particulate medium (e.g. sand) for the distribution of gas over a defind area 2
35、.11 rated heat input the manufacturers declared heat input for the appropriate reference test gas Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 2 BSI 03-1999 3 Classification of appliances 3.1 Classification by category The
36、 category system of appliance classification is described in A.1.3 of BS 4947:1984 by which an appliance is denoted by a category number, 1, 2, or 3, according to the number of gas families that it is designed to burn. The gas families are identified by subscripts T, N and L for 1st, 2nd and 3rd gas
37、 families respectively; subscripts P and B refer to propane and butane respectively. For the purposes of this Part of BS 5258 the following categories of appliance are permitted: Category 1N, 1L, 1L/B, 1L/P Category 2NL, 2NL/B, 2NL/P Within a given category the changes that are allowed in adapting a
38、n appliance from operation on one gas or gas family to operation on another are limited as follows. a) Change of gas family 1) Adjustment of governor setting or exchange of governor springs or immobilization of the governor (when fitted). 2) Exchange of injectors or non-aerated burner assemblies. 3)
39、 Adjustment of aeration. 4) Exchange or adjustment of auxiliary components (e.g. pilots, igniters, restrictors). b) Change of gases within 3rd family. 1) Adjustment of aeration. 3.2 Classification by flue type Appliances are also classified according to the flue system for which they are designed an
40、d the source of the combustion air. This Part of BS 5258 covers type B, i.e. open-flued appliances only. NOTEThe relevant definition of this type of appliance is given in BS 1179-6. 4 General requirements The appliance shall comply with this Part of BS 5258 when tested using the specified test gases
41、 of the appropriate gas family. NOTE 1Full details of the test gases are given in BS 4947. NOTE 2Appliances designed to burn 3rd family gases may be designed for use with either commercial butane or commercial propane, or both. When submitted for type testing an appliance shall be supplied with all
42、decorative trims and fire fronts. 5 General conditions of test 5.1 Test room The room shall be adequately ventilated, but free from draughts likely to affect the performance of the appliance. If the test results are influenced by the temperature of the ambient air, the room temperatures shall be mai
43、ntained at 20 5 C. Figure 1 Illustrations of fuel effect appliances Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:30:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-12:1990 BSI 03-19993 5.2 Preparation of appliance The appliance shall be installed and adjusted in accordance with th
44、e manufacturers instructions, using the appropriate reference test gas at the following inlet pressure. Before any tests are made the appliance shall be operated at its full working temperature for a period sufficient to dry the insulation and remove any temporary finish that might interfere with ob
45、servations. 5.3 Test conditions 5.3.1 The test conditions given in 5.3.2 to 5.3.8 shall apply except where otherwise specified in Section 2. 5.3.2 The appliance shall be installed on a test box and flue as described in Appendix A. The chimney shall terminate inside the test room. 5.3.3 Where the app
46、liance is to be used with a surround, specific to the appliance, this surround shall be non-combustible and shall be supplied by the manufacturer for the purposes of testing the appliance. This surround shall be of the minimum thickness specified in the manufacturers instructions. 5.3.4 The gas conn
47、ections and systems up to and including the burner shall be examined for soundness both before and after test. The test results are deemed invalid unless the system is sound (see 7.1). 5.3.5 The appliance shall be at room temperature at the start of each test. 5.3.6 During testing the initial adjust
48、ment of the appliance shall not be altered. 5.3.7 Precautions shall be taken to prevent thermostats or other variable controls from acting to interfere with the gas flow, except as necessitated by the test. 5.3.8 Test pressures shall be measured correct to 0.2 mbar and controlled so that the variati
49、on does not exceed 0.2 mbar. NOTE 1The test gases (and, where appropriate, their conditions of application) to be used are specified in the relevant clauses of Section 2. For 3rd family gas appliances, test gases LPGA and LPGB are used with the appliance adjusted for butane and test gases LPGC and LPGE with the appliance adjusted for propane. NOTE 2In general, except for tests involving governor performance, the appliance governor, if any, may be put out of operation and the specified test pressure obtaine