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1、BRITISH STANDARD BS 3376:1994 Specification for Open fires burning solid mineral fuels with convection, with or without boilers Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 This British Standard, having been prepared under th
2、e direction of the Refrigeration, Heating and Air Conditioning Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1994 BSI 05-1999 First published May 1962 Second edition September 1982 Third edition June 1991 Fourth edition June 199
3、4 The following BSI references relate to the work on this standard: Committee reference RHE/28 Draft for comment 89/75667 DC ISBN 0 580 22802 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Refrigeration, Heating and Air Conditioning S
4、tandards Policy Committee (RHE/-) to Technical Committee RHE/28, upon which the following bodies were represented: Association of British Solid Fuel Appliance Manufacturers Association of Building Engineers British Coal Corporation British Fuel and Chimney Manufacturers Association Consumer Policy C
5、ommittee of BSI Department of the Environment HETAS Ltd. Low Temperature Coal Distillers Association of Great Britain Ltd. METCOM National Fireplace Council Manufacturers Association Waterheater Manufacturers Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffie
6、ldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 BSI 05-1999i Contents Page Committees responsibleInside front cover Forewordiii Section 1. General 1.1Scope1 1.2References1 1.3Definitions1 1.4Classification2 Section 2. Construction 2.1General4 2.2Mini
7、mum dimensions for category b) appliances4 2.3Firefront4 2.4Bottomgrate4 2.5Combustion air control4 2.6Ashpan5 2.7Ashpit and ashpit cover5 2.8Front firebars and fallplate5 2.9Deepening bar6 2.10 Deepening plate6 2.11 Gas ignition burner6 2.12 Boiler8 2.13 Boiler flue8 2.14 Throat restrictor8 2.15 Co
8、nvection chamber and airways9 2.16 Tools10 2.17 Electrical10 Section 3. Performance 3.1Thermal performance11 3.2Banking performance11 3.3Condition of appliance after test11 3.4Throat restrictor11 Section 4. Instructions and marking 4.1Instructions14 4.2Marking14 Annex A (normative) Test methods and
9、conditions15 Annex B (normative) Test fuels19 Figure 1 Typical inset open fire showing ash shedding area3 Figure 2 Example of a suitable aeration device for a natural gas ignition burner7 Figure 3 Gas connection elbows8 Figure 4 Schematic diagram of boiler flue mouth entry9 Figure A.1 Datum level fo
10、r various types of open fire16 Table 1 Materials for construction of appliance components5 Table 2 Minimum dimensions for category b) appliances5 Table 3 Minimum ashpan capacity5 Table 4 Relationship between gas ports and air ports6 Table 5 Range of adjustment of throat restrictor9 Licensed Copy: sh
11、effieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 ii BSI 05-1999 Page Table 6 Materials and minimum thickness of convection chamber and airways for appliances without fan assisted convection air10 Table 7 Materials and minimum thickness of convect
12、ion chamber and airways for appliances with fan assisted convection air10 Table 8 Performance of category a) appliances burning test fuel A or B12 Table 9 Performance of category b) appliances burning test fuel A or B13 Table 10 Performance of category b) appliances burning test fuel C and designate
13、d as suitable for burning bituminous coal at enhanced efficiency13 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 BSI 05-1999iii Foreword This British Standard has been prepared under the dir
14、ection of the Refrigeration, Heating and Air Conditioning Standards Policy Committee and supersedes BS 3376:1991 which is withdrawn. This standard has been revised as a result of revisions to other standards referred to in the text, to prevent duplication and to reflect the latest information. A Bri
15、tish 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 confer immunity from legal obligations. Summary of pages This document comprises a fro
16、nt cover, an inside front cover, pages i to iv, pages 1 to 20, 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 in the amendment table on the inside front cover. Licensed Copy: sheffieldun shef
17、fieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 BSI 05-19991 Section 1. General 1.1 Scope This British Standard specifies constructional, dimen
18、sional and performance requirements for inset or freestanding open fires giving space heating by convection in addition to radiation and designed to burn solid mineral fuels (i.e. bituminous coal, Welsh dry steam coal, anthracite or manufactured fuels derived from these coals). NOTEThis standard doe
19、s not apply to inset open fires without convection (see BS 4834). The standard covers appliances of nominal widths 350 mm, 400 mm, 450 mm, 500 mm and 550 mm designed for use either with fireplace components specified in BS 1251 or with special fireplace components or boilers supplied with the applia
20、nce. The essential components of appliances covered by this standard are the firefront, bottomgrate, ashpit cover, ashpan, means of primary air control and a convection chamber. Specified optional features may comprise a deepening bar, deepening plate, front firebars, undergrate gas igniter, boiler
21、and throat restrictor. Fan(s) may be incorporated for supplying combustion air and/or convection air. Appliances are designated as either intermittent or overnight. 1.2 References 1.2.1 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publ
22、ications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard
23、only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1.2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions
24、of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 1.3 Definitions For the purposes of this British Standard, the definitions given in BS 1846-1, BS 6100-1.5.1, BS 3250-1 and BS 3323 apply toge
25、ther with the following. 1.3.1 effective grate area the area Y in the plane of the bottomgrate, enclosed by the back and sides of the firebox and by the firefront, when the appliance is installed in accordance with the manufacturers instructions (see A.4.5) 1.3.2 rectangular bottomgrate a bottomgrat
26、e, the sides of which form a rectangle 1.3.3 tapered bottomgrate a bottomgrate, the sides of which form a trapezium 1.3.4 normal output boiler a boiler designed to give a water heating output level of at least 2.3 kW but less than 3.5 kW at the target burning rate 1.3.5 high output boiler a boiler d
27、esigned to give a water heating output level of at least 3.5 kW at the target burning rate 1.3.6 target burning rate a designated rate of fuel consumption (on a dry basis), depending upon the nominal width and category of the appliance under specified test conditions 1.3.7 ash shedding area the area
28、 Z within the frame of the bottomgrate, as shown in Figure 1 a) or Figure 1 b), comprising the projected area of the firebars and the spaces between the firebars in the plane of the bottomgrate (see A.4.5) 1.3.8 firefront the structure that forms the front of the appliance and which may also be deco
29、rative Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 2 BSI 05-1999 1.3.9 ash collection area the maximum area X of the ashpan capable of collecting ash, unless ash deflectors or similar design features are fitted. In this case
30、, the ash collection area X includes the projected area of those parts of the deflectors, etc., that do not overlap the ashpan when it is in place (see A.4.5) 1.4 Classification For the purposes of this standard, appliances are categorized as follows. a) Appliances with a tapered bottomgrate see Fig
31、ure 1 a): 1) without a boiler; 2) with a boiler designed for normal output; 3) with a boiler designed for high output (see note). b) Appliances of minimum nominal width 400 mm (see note), with a rectangular bottomgrate see Figure 1 b), with a boiler designed for high output. This category includes a
32、ppliances designated as capable of burning bituminous coal at enhanced efficiency. This category excludes intermittent appliances. NOTEAppliances with a rectangular bottomgrate which do not conform the dimensions given in Table 2 and Table 3 are treated as category a) 3) appliances. Licensed Copy: s
33、heffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 BSI 05-19993 Figure 1 Typical inset open fire showing ash shedding area Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3376:1994 4 BS
34、I 05-1999 Section 2. Construction 2.1 General The components of the appliance shall be made from the material indicated in Table 1. Component parts which require periodic replacement shall be either designed or marked to ensure correct fitting (see section 4). NOTESuch parts should be easily replace
35、able. 2.2 Minimum dimensions for category b) appliances Category b) appliances shall conform to the minimum dimensions given in Table 2, determined in accordance with A.4.3 and A.4.5.2. NOTEAppliances with a rectangular bottomgrate that do not conform to Table 2 are considered to be category a) 3) a
36、ppliances (see 1.4). 2.3 Firefront Means shall be provided for rigidly fixing the firefront either directly or indirectly to either the back hearth or the boiler. The width of that part of the firefront designed to fit within the tiled surround (dimension D in Figure 1) shall be the nominal width of
37、 the appliance mm. 2.4 Bottomgrate 2.4.1 General The bottomgrate shall be designed to fit either a fireback conforming to BS 1251 or a purpose-made fireback or boiler. It shall be capable of being removed and shall be either designed or marked to ensure correct fitting. The bottomgrate shall consist
38、 of a series of firebars and the width of the space between the bars shall be 13 mm 2 mm. NOTEThe bottomgrate should be supported in such a way as to offer minimum obstruction to the removal of ash. 2.4.2 Assembly If the appliance is supplied with its own fireback or boiler, it shall be assembled in
39、 accordance with the manufacturers instructions. Otherwise it shall be assembled and installed in a model fireback (e.g. constructed from wood) conforming to the mean dimensions specified in BS 1251 with a tolerance of 1 mm. NOTEIf adjustable, the bottomgrate may be trimmed to the most appropriate d
40、imensions, in accordance with the manufacturers instructions. 2.4.3 Appliances without underfloor air supply When assembled as described in 2.4.2, the appliance shall conform to the following. a) The side-to-side movement of the bottomgrate within its support shall not exceed 5 mm. b) It shall not b
41、e possible to pass a 20mm diameter sphere from above the bottomgrate into the ashpit at any point other than a corner. c) It shall not be possible to pass a 30mm diameter sphere from above the bottomgrate into the ashpit at a corner. d) There shall be a clearance of not less than 6 mm in the plane o
42、f the bottomgrate at all points between the bottomgrate and adjacent components. 2.4.4 Appliances with underfloor air supply When assembled as described in 2.4.2, the appliance shall conform to the following. a) It shall not be possible to pass a 20mm diameter sphere from the bottomgrate into the as
43、hpit at any point other than a corner. b) It shall not be possible to pass a 30mm diameter sphere from above the bottomgrate into the ashpit at a corner. c) There shall be a clearance of not less than 3 mm in the plane of the bottomgrate surface at all points between the bottomgrate and adjacent com
44、ponents. 2.5 Combustion air control The appliance shall be designed so that, when it is installed according to the manufacturers instructions, the primary air shall enter the ashpit only through the designated air inlet(s). NOTE 1The primary air may be fan assisted. If for an overnight burning appli
45、ance the hearth forms the base of the ashpit, a means of sealing the firefront to the hearth and to either the fireback or boiler shall be provided and be detailed in the manufacturers instructions. The air control shall be capable of maintaining any position in which it is intended to be set. It sh
46、all be capable of adjustment to at least three intermediate positions between the fully closed and fully open positions. Two of these positions shall be between the fully closed position and 30 % of the fully open position, measured in terms of the area of the primary air opening. NOTE 2A further me
47、ans of fine air control in the nearly closed position should be provided. NOTE 3The design of the fire should be such that spillage of fuel or ash should not prevent complete closure of the air control. 0 3 0 1 0 1 0 1 0 1 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 05:31:49 GMT+00:00 200
48、6, Uncontrolled Copy, (c) BSI BS 3376:1994 BSI 05-19995 Table 1 Materials for construction of appliance components Table 2 Minimum dimensions for category b) appliances 2.6 Ashpan An ashpan shall be provided, constructed of low carbon steel or stainless steel (see Table 1) of minimum thickness 0.91
49、mm. The minimum ashpan capacity shall be not less than the value given in Table 3. The capacity shall be determined geometrically. If the ashpan is open at the rear, an angle of repose for the ash of 45 shall be assumed at the rear end. The ashpan shall be so designed that the ash collection area X shall be not less than the ash shedding area Z when calculated in accordance with A.4.5. NOTEThe ashpan should be designed and constructed to ensure the following: a) that it locates in the ashpit in such a way that it allo