BS 5871-2-2005 Specification for the ninstallation and nmaintenance of gas nfires convector nheaters fire back nboilers and decorative nfuel effect gas nappliances — nPart 2 Inset .pdf

1、BRITISH STANDARD BS 5871-2:2005Specification for the installation and maintenance of gas fires, convector heaters, fire/back boilers and decorative fuel effect gas appliances Part 2: Inset live fuel effect gas fires of heat input not exceeding 15 kW,and fire/back boilers (2nd and 3rd family gases)IC

2、S 97.100.20nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnullnullIncorporating Amendment No. 1 BS 5871-2

3、:2005This BritishStandard was published under theAuthorityofthe Standards Policyand Strategy Committee on13April2005 First published July 1980Second edition September1991Third edition July2001Fourth edition April 2005The following BSI referencesrelate to thework onthis British Standard:Committee ref

4、erenceGSE/30Draft forDevelopment03/320605DCCommittees responsible for this BritishStandardThe preparation of this British Standard was entrusted to TechnicalCommitteeGSE/30, Gas installations (1st, 2nd and 3rd family gases), uponwhich the following bodies were represented:Boiler and Radiator Manufac

5、turersAssociation Ltd.BritishFlue and Chimney Manufacturers AssociationBSI ConsumerPolicy CommitteeCatering Equipment Suppliers AssociationCentrica plcCouncil for RegisteredGas InstallersDepartment ofTrade and IndustryHealth and SafetyExecutiveHeating and Ventilating Contractors AssociationICOM Ener

6、gy AssociationInstitute of Domestic Heating and Environmental EngineersInstitutionof Gas Engineers and ManagersL P Gas AssociationSociety of British Gas IndustriesCo-opted membersAmendments issued since publicationAmd. No. Date CommentsISBN 978 0 580 50957 5 Amendment No. 1See foreword 30 November 2

7、007 BSI 2007 BS 5871-2:2005iContentsPageCommittees responsible Inside front coverForeword iii1Scope 12Normative references 13Terms and definitions 24Exchange of information and planning 45Appliances56Materials and components 87Location88Appliance sizing9Ventilatio1011 Appliance fixing12 Fire precaut

8、ions1314 Electricity supplies andw15 Ventilation(Fire/back boilers and fire/back circulators 16 Appliancefixing (Fire/back boilersand fire/back circulators 17 Fire precautions (Fire/back boilers and fire/back circulators only)18 Water connections (Fire/back boilers and fire/back circulators only)19

9、Commissioning20 Instructions and use of fireguards21 Advice to be given to theAnnex A (informative)Calculation ofrequired heatoutput of aAnnex B (informative)Calculation ofclearance flueBibliographyFigure1 Types of fuel effect appliances covered by BS5Figure2 General layout live fueleffect gas fire,

10、 with or without abackboilerFigure3 Methods of using a flue liner in a masonrychimney insta llationserving a gas appliance, other than a backFigure 4 GeneralFigure 5 Installationof a fire within the inner leaf ofa cavitywall usingafanned draught fluesystemFigure6 Inset live fuel effect gas fire with

11、 direct flue Figure 7 Examples ofan inset live fuel effect gas fire installed to a masonryFigure 8 Installation ofa live fuel effectgas fire and combined back boilerwhere a chimney breast is extended to form a duct for pipeworkFigure 9 Installationof a gas fire and combined back boiler usingabackboi

12、lerenclosure and prefabricated chimney/fluesysteFigure B.1 Bubble leak indicatoFigureB.2 Basic test Figure B.3 Test box and flue for appliances that can be installed inametalflue boxFigure B.4 Collecting hoodFigure B.5 Collecting hood positioning BSI 2007only)only)13 14 15 21 25 27 28 28 29 33 33 33

13、 34 34 36 37 11 12 19 20 23 31 32 42 43 44 45 46 7 9 boilerboxFlueingnGas supplyiring fireflow installation chimney and wiringm r user 871 connection BS 5871-2:2005iiPageTable 1A Temperaturesand ventilationTable 1B Air change rates forrooms with open firesand flues up to40000mm2 (200mm 200mm)Table 2

14、 Designation system for metal chimneys for use with gasTable 3 Minimum voidvolumes andd e pths below gas fire flue Table A.1 Fabricand ventilationheat losses for exampl e Table B.1 Test internal air pressuresTable B.2 Wobbe number for test gasesTable B.3 Inlet pressurefor tolerancesTable B.4 K value

15、sfor reference gases BSI 200713 13 15 24 37 38 38 38 41 rates fires spigots A or the lowest point of the outlets of a debris deflector in a flue kit BS 5871-2:2005iiiForewordThis part ofBS5871 has been prepared under the directionof the Gas Standards Policy Committee and is a revision ofBS5871-2:200

16、1, which is withdrawn.This new edition ofBS5871-2 comes into effect on11July2005.This revision providesan update ofthe previous standard and has beenexten dedtocover both the new development of inset live fueleffect gas fires combined withback boilers, fires with a direct flueconnection, and include

17、s requirements for firesinstalledin raisedbuilders openings (hole-in-the-wallfireplaces). In order toimprove the layout of the standard, additional requirements for theinstallation of fire/back boilers and fire/back circulatorsarenow specified in Clauses 15, 16, 17 and18. BS5871continues tocover the

18、 different types offueleffect appliancesin a single seriesof British Standards, as follows: BS5871-1: Gas fires, convector heaters, fire/ back boilers and heating stoves (2nd and 3rdfamily gases). BS5871-2: Inset live fuel effect gas fires of heat input not exceeding 15 kW and fire/ back boilers (2n

19、d and 3rd family gases). BS5871-3: Decorative fuel effect gas appliances of heat input not exceeding 20 kW (2nd and 3rd family gases). BS 5871-4: Independent gas-fired flueless space heaters for nominal heat input not exceeding 6kW (2nd and3rd family gases) (in the course ofpreparation).To identifyw

20、hichpart of BS5871 to use when fitting an appliance whichsimulatesa solid fuel fire, reference should be madetoFigu re 1 whichserves toillustrate appliance types and link them tothe appropriate part ofBS5871. It shouldbe noted that the only fuel effect appliances covered by this partofBS5871 are gas

21、 fires detailed ind) of the commentary and recommendationsonClause 5 of this standard.Themanufacturers instructions supplied with fanned draught appl iances inwhich the fan is either integral with theappliance or with the flue system willmake reference to the appropriate part ofBS5871.It should be n

22、oted that the onlyappliancescovered by this part ofBS5871 arethosethat are“CE” marked. However, BS5871-2 mayalso be referred to f or theinstallation ofused appliances, where appropriate, providing the manufacturers instructions are available. In such circumstances, the installer should satisfy himse

23、lf that the appliance issafe inconstruction and condition, and can be used without constituting a danger. Attention is drawn toClause 5 concerning thisparticular aspect.Arising from European standards harmonization, some BritishStandards appliance specifications are now being replaced by European St

24、andards. Oneconsequenceof this process is that the reference clearance flue flowtest,currently included in some of the British Standards covering the safety ofappliances dealt with byBS5871, will not be given in European appliancestandards. This test has hitherto been used to determine the flue flow

25、, under laboratory conditions, that an appliance will just clear its combustion products. The test has been used as a key factor in determining whether or not certain appliances of 7kW1)heat input or less require purpose provided ventilation for their installation.1) Due to tolerances,this applies t

26、o a heat input of 7kW onboth net and gross calorificvalue.SeeClause 1 , Scope,Note 3.Amendment No. 1 provides advice on the installation of the types of direct flue connection fires known in the trade as “cassette fires”, which may be available with an optional flue kit that allows them to be instal

27、led to an unlined chimney under special conditions. The start and finish of text introduced or altered by Amendment No. 1 is indicated in the text by tags !“. Minor editorial changes are not tagged. BSI 2007BS 5871-2:2005ivAlthough BS5871 is anappliance installation standard, the drafting committeeh

28、as decided to include the clearance flue te st as an informative annex. It is hopedthat this arrangement will provide Notified Test Houses under the Gas ApplianceDirective with a continuing m eans to evaluateappliancesfor installation withinthe UKwhichclaim that no purpose provided ventilation is ne

29、cessary for their installation. This standard allows manufacturers instructions to spec ify a method ofinstallation, testing,commissioning or maintenancewhichdiffers in points ofdetail from this standard. This reference tomanufacturers in structions isallowedonlywhere it will resultin at least anequ

30、ivalent level of safety. Insuchcircumstances, it is important that the manufacturers instructions are followed.NOTE1In the preparation of this standard, theopportunityhas been taken topresent it inthe format of a practice specification as defined inPD 6501-1. This format allows the requirements of t

31、he specification to be supported by recommendations.Tocomply with this specification, the userhas to comply with all its requirements.He may departfromrecommendations but this would be his ownresponsibility and he would be expected to have good reasons for doingso.This publication doesnot purportto

32、include all necessary provisionsofa contract. Usersareresponsible for its correct application.Compliance with a British Standard does not of itself confer immunityfrom legal obligations. In particular, attention is drawn to the followingstatutory regulations. The Gas Safety(Installation andUse)Regul

33、ations1998 1The Gas Safety(Installation andUse)(Northern Ireland) Regulations20042The Gas Appliances (Safety) Regulations1995 3The BuildingRegulations 2000, as amended 4The Building(Scotland) Regulations 2004 5The BuildingRegulations (Northern Ireland) Statutory Rules2000, asamended 6The Gas Safety(

34、Application) Order (Isle of Man)19967Summary of pagesThe BSIcopyright notice displayed in this document indicateswhen the document was last issued. BSI 2007This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 48, an inside back cover and a back cover BS 5871-2:2005

35、1 ScopeThis partof BS5871specifies installation and maintenance requirements for inset live fuel effect gasfiresof heat inputnotexceeding15kW (16.6kW based on gross calorific value)burning2nd and3rd family gases for the purpose of heating rooms or spaces i n domestic (seeNote5) or commercial premise

36、s .Combined appliances ofthetype where a fire is used in conjunction with a boiler or circulator are alsocovered in so far asthe installation of the combinedappli ance is concerned.The standard is applicable to appliances intended for installation either:a)within a builders openingand/or fireplace r

37、ecess and which may, additionally, be suitable for installation in a purpose designed metalflue box conforming toBS715 and flue conforming to the constructional and temperature requirements ofBSEN1856-1 andBSEN1856-2; orb)using a direct flueconnection, if specified in the manufacturers instructions;

38、 orc)in the case of a room sealed appliance, using a flue terminal/air duct assemb ly supplied by theappliance manufacturer.This standard covers the selection ofa suitable appliance, the ventilation and flueing requirements, andother measures necessary to ensure a safe installation.The central heati

39、ng and/or hot water system connectedto a combined appliance isnot within thescope of this standard and reference should be made toBS5449 (seeNote6) andBS5546 for thispart of such aninstallation.This standard is not applicable tomobile and portable appliances conforming toBSEN449 or to appliancesin t

40、ouring caravans.Additional requirements for the installationof fire/back boilers and fire/back circulators are specifiedinClauses 15, 16, 17 and 18.NOTE1Inset live fuel effect gas fires differ from decorative fuel effect gas appliances, which burn gasso as to simulate a solid fuel fire orproduce oth

41、erdecorative effects,inthat they incorporate a heat exchangerand restrictthe passageofthe products ofcombustion between the appliance firebed and the chimney or flue. The only decorative fueleffect gas appliancescovered by this partofBS5871 arethose shown inFigure 1b) and detailed in1d) of the comme

42、ntary and recommendations onClause5 of this standard.NOTE2Unless the contextrequires otherwise, insetlive fuel effect gas fires are hereinafter referred toas fires.NOTE3Heat inputs in this documentare based onnetcalorificvalue. Figures based on grosscalorificvalue are given in parenthesiswhere deeme

43、d necessary. SeealsoClause 5 , commentaryand recommendationsg).NOTE4Attention is drawn to theforeword concerning th einstallationofused appliances.NOTE5As well as normally constructeddwellings, domestic premises include any permanentlysitedcaravanholidayhomes,residential park homes andpermanently mo

44、ored boats.SeeIGE/UP/8 8.NOTE6BS5449 has been partly replaced byBSEN12828 andBSEN 12831, and is to be withdrawn onceBSEN14336 andBSEN14337 are published.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constituteprovisionsofthis Britis

45、h Standard.For datedreferences, subsequentamendments to, or revisions of, any of these publications do not apply.For undated references, the latest edition of the publication referred toapplies.BS 1289-1 , Flue blocks and masonry terminals for gas appliances Part1:Specification for precastconcrete f

46、lue blocks and terminals.BS 4543-2 , Factory-made insulated chimneys Part2: Specification for chimneys with stainless steel flue linings for use with solid fuel fixed appliances.BS 4543-3 , Factory-made insulated chimneys Part 3: Specification for chimneyswith stainless steel fluelining for use with

47、 oil fired appliances.BS 5440-1 , Installation and maintenance of flues and ventilation for gas appliances of rated input notexceeding70kW (1st, 2nd and 3rd family gases) Part1:Specification for installation of flues.BS 715 to Specification for metal flue !boxes for gas-fired appliances not exceedin

48、g 20 kW.“ BSI 2007 1BS 5871-2:2005BS5440-2 , Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding70kW (1st, 2ndand 3rd family gases P art 2: Specification for installationand maintenance of ventilation for gas appliances.BS5449 , Specification for for

49、ced circulation hot water central 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 dwellings.BS 5546 , Specification for installation of gas hot water supplies for domestic purposes (1st, 2ndand 3rdfamily gases).BS 6700 , Specification for design, installati