BS 5990-2006 Specification for direct gas-fired forced convection air heaters with rated heat inputs greater than 330 kW but not exceeding 2 MW for industrial and commercial space .pdf

1、BS 5990:2006Specification for direct gas-fired forced convection air heaters with rated heat inputs greater than 330 kW but not exceeding 2 MW for industrial and commercial space heating Safety and performance requirements (excluding electrical requirements) (2nd family gases)ICS 97.100.20NO COPYING

2、 WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2006ISBN 0 580 48077 1The following BSI references relate to the work on this standard:

3、Committee reference GSE/20/4Publication historyFirst published, March 1981Second edition, January 1990Third edition, July 2006Amendments issued since publicationAmd. no. Date Text affectedBS 5990:2006 BSI 2006 iBS 5990:2006ContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 3

4、4 Classification of appliances 55 General requirements 56 General conditions of test 57 Design and construction 68 Soundness 139 Heat input 1410 Combustion 1411 Ignition 1712 Flame stability 2013 External temperatures 2014 Manual gas valves 2115 Automatic controls 2116 Motors and fans 2717 Electrici

5、ty supply 2818 Manufacturers instructions 2919 Facilities for commissioning and testing 3020 Identification and marking 3121 Air handling 3322 Surface heat dissipation 3423 Air delivery volume 3424 Weather resistance 37Bibliography 40List of figuresFigure 1 Paint scratch test apparatus 11Figure 2 Te

6、st duct for air flow measurement 35Figure 3 Anti-swirl device 36Figure 4 Air flow regulation device 36Figure 5 Connecting bend 36Figure 6 Arrangement of spray heads and associated piping for rain test 38Figure 7 Details of spray head assembly and construction 39List of tablesTable 1 Limiting concent

7、rations 15Table 2 Heat input conditions 16Table 3 Test gas conditions 18Table 4 Surface temperature rise 20Table 5 Main gas safety shut-off valve system requirements 22Table 6 Flame supervision device drop-out times 24Table 7 Fan motor windings: permissible temperature rises 28Summary of pagesThis d

8、ocument comprises a front cover, an inside front cover, pages i and ii, pages 1 to 40, an inside back cover and a back cover.ii BSI 2006BS 5990:2006ForewordPublishing informationThis British Standard was published by BSI and came into effect on 20 July 2006. It was prepared by Subcommittee GSE/20/4,

9、 Air heaters (gas), under the authority of Technical Committee GSE/20, Non-domestic space heaters (gas). A list of organizations represented on this committee can be obtained on request to its secretary.SupersessionThis British Standard supersedes BS 5990:1990 (including Amendment 1:1990), which is

10、withdrawn.Relationship with other publicationsRequirements for appliances with rated heat inputs up to 300 kW based on the net calorific value are given in BS EN 525:1998.Corresponding requirements for indirect gas fired forced convection air heaters are specified in BS 5991.Electrical requirements,

11、 applicable for both direct and indirect gas-fired forced convection air heaters, are specified in BS 5986.Information about this documentThis new edition of BS 5990 incorporates changes made necessary by the publication of BS EN 525:1998. It does not represent a full review or revision of the stand

12、ard, which will be undertaken in due course.This edition has been prepared in order to fulfil the obligation to withdraw conflicting national standards. As a consequence, it no longer applies to appliances with rated heat inputs up to 330 kW based on the gross calorific (300 kW based on the net calo

13、rific value).Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type

14、, and does not constitute a normative element.Contractual and legal considerationsThis 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 cannot confer immunity from legal obligation

15、s. BSI 2006 1BS 5990:20061 ScopeThis British Standard gives detailed requirements, including safety and performance requirements and methods of test, for direct gas fired forced convection air heaters having heat inputs greater than 330 kW but not exceeding 2 MW, intended for industrial and commerci

16、al applications. Appliances covered by this standard are not intended for installation in domestic dwellings.The scope of this standard includes direct gas fired forced convection air heaters for use both with and without ducting, and intended primarily for space heating applications. It therefore i

17、ncludes air heaters designed to provide make-up air, door curtain heaters, spray booth heaters, portable air heaters and direct fired air heaters capable of providing full space heating.This standard specifies the requirements for direct gas fired forced convection air heaters designed for permanent

18、 outdoor installation. It also specifies the requirements for transportable direct gas fired forced convection air heaters.This standard applies to appliances designed to operate on normal low pressure district supplies of 2nd family gas.For appliances fitted with gas boosters, additional requiremen

19、ts may apply.2 Normative referencesThe 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 referenced document (including any amendments) applies.BS 10, Specific

20、ation for flanges and bolting for pipes, valves and fittingsBS 476-4, Fire test on building materials and structures Part 4: Non-combustibility test for materialsBS 476-7, Fire test on building materials and structures Part 7: Method for classification of the surface spread of flame of productsBS 47

21、6-12, Fire test on building materials and structures Part 12: Methods of test for ignitability of products by direct flame impingementBS 1042-2.1 (ISO 3966), Measurement of fluid flow in closed conduits Part 2.1: Method using Pitot static tubesBS 1179-6, Glossary of terms used in the gas industry Pa

22、rt 6: Combustion and utilization including installation at consumers premisesBS 4921, Specification for sherardized coating on iron or steelBS 5000-11, Specification for rotating electrical machines of particular types or for particular application Part 11: Small power electric motors and generators

23、BS 5990:20062 BSI 2006BS 5986, Specification for electrical safety and performance of gas fired space heating appliances with inputs 60 kW to 2MWBS 6230, Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating (2nd and 3rd family gases)BS

24、 6501-1, Metal hose assemblies Guidance on the construction and use of corrugated hose assembliesBS EN 88, Pressure governors for gas appliances for inlet pressures up to 200 mbarBS EN 161, Automatic shut-off valves for gas burners and gas burning appliancesBS EN 257, Mechanical thermostats for gas

25、burning appliancesBS EN 298, Automatic gas burner control systems for gas burners and gas burning appliances with or without fansBS EN 437, Test gases Test pressures Appliance categoriesBS EN 525:1998, Non-domestic direct gas-fired forced convection air heaters for space heating not exceeding a net

26、heat input of 300 kWBS EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flangesBS EN 1092-3, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 3: Steel flangesBS EN 15

27、15-1, Flanges and their joints Bolting Part 1: Selection of boltingBS EN 10143, Continuously hot-dip metal coated steel sheet and strip Tolerances on dimensions and shapesBS EN 10226-1, Pipe threads where pressure tight joints are made on the threads. Taper external threads and parallel internal thr

28、eads Part 1: Dimensions, tolerances and designationBS EN 10226-2, Pipe threads where pressure tight joints are made on the threads. Taper external threads and taper internal threads Part 2: Dimensions, tolerances and designationBS EN 12329, Corrosion protection of metals Electrodeposited coatings of

29、 zinc with supplementary treatment on iron or steelBS EN 12540, Corrosion protection of metals Electrodeposited coatings of nickel, nickel plus chromium, copper plus nickel and copper plus nickel plus chromiumBS EN 55014-1, Electromagnetic compatibility Requirements for household appliances, electri

30、c tools and similar apparatus Part 1: EmissionBS EN 60730-2-9, Automatic electrical controls for household and similar use Part 2-9: Particular requirements for temperature sensing controlsBS EN 61032, Protection of persons and equipment by enclosures Probes for verification.BS EN ISO 1461, Hot dip

31、galvanized coatings on fabricated iron and steel articles Specifications and test methods BSI 2006 3BS 5990:20063 Terms and definitionsFor the purposes of this British Standard, the terms and definitions given in BS 1179-6, BS 6230 and the following apply.3.1 air-gas ratio controlsystem that automat

32、ically controls gas and air flow rates so as to maintain the desired air-gas ratio throughout the heat input range of the appliance3.2 air temperature controltemperature-actuated control intended to maintain the temperature of the discharged air between specified limits; this is the normal means of

33、air temperature control3.3 automatic recyclingautomatic repetition of the starting up sequence without manual intervention3.4 burnercombustion system under the control of a single system of safety shut-off valvesNOTE 1 An appliance may have more than one burner and a burner may comprise a number of

34、separate nozzles or bars.NOTE 2 This definition differs from that given in BS 1179-6.3.5 direct fired forced convection air heaterforced convection air heater in which the products of combustion mix with the heated air being supplied to the space3.6 forced convection air heaterappliance designed to

35、provide space heating from a central source by distributing heated air, by means of an air-moving device, either through ducting or directly into the heated space3.7 hazardous conditioncondition that could result in damage external to the appliance and/or injury to personnel3.8 high temperature dire

36、ct fired forced convection air heaterdirect fired forced convection air heater designed to operate with an air temperature rise through the appliance greater than 55 K3.9 lock-outsafety shut-down condition of a control system such that restart cannot be accomplished without manual interventionBS 599

37、0:20064 BSI 20063.10 low temperature direct fired forced convection air heaterdirect fired forced convection air heater designed to operate with a maximum air temperature rise through the appliance of 55 K or less3.11 overheat (limit) controloverheat control is a temperature-actuated device preset a

38、nd sealed by the manufacturer and designed to protect the appliance and its surroundings in the event of failure of the normal means of temperature controlNOTE This definition differs from that given in BS 1179-6.3.12 profile platesadjustable plates fitted for the purpose of setting the air flow vel

39、ocity across the burner3.13 proved air flowminimum air flow at which the air proving device indicates the presence of air flow3.14 rated heat inputappliance manufacturers declared heat input for the appropriate reference test gas3.15 safety shut-downaction of shutting off all gas and ignition energy

40、 by means of a safety control such that restart takes place only after manual intervention or automatic recycling3.16 setting pressurepressure, measured at the pressure test point, that is specified by the manufacturer for the purpose of adjusting the appliance heat input3.17 start-gas flameflame es

41、tablished at the start-gas rateNOTE This may either be a pilot flame or the main burner flame at reduced rate.3.18 transportable direct fired forced convection air heatertrolley or skid-mounted direct fired forced convection air heater designed to operate with a maximum air temperature rise through

42、the appliance of 55 K or less BSI 2006 5BS 5990:20064 Classification of appliances4.1 By categoryBS EN 437 describes the category system of appliance classification in which an appliance is denoted by a category number I, II or III according to the number of gas families that it is designed to burn,

43、 these families being identified by subscript numbers 1, 2 and 3 for the 1st, 2nd and 3rd families respectively, and subscript letters identifying specific gas groups.This standard is concerned with appliances of category I2Honly.4.2 By flue typeAppliances are also classified according to the flue s

44、ystem for which they are designed and the source of combustion air.Type A: flueles appliances.Type B: open-flued appliances.Type C: room-sealed appliances.Type C1: balanced flue appliances.Type C2: se-duct appliances.This standard is concerned with appliances of type A only.5 General requirementsThe

45、 appliance shall conform to the requirements of this standard when tested using the test gases specified in BS EN 437 for group H 2nd family gas.Appliances submitted for test shall be supplied complete with all ancillary equipment, e.g. air filter, bird screens, etc. necessary for normal installatio

46、n and operation.Any new features incorporated in an appliance for which no provision for testing is made in this standard shall not adversely affect the safe and correct operation of the appliance. The new features shall be examined in the light of the manufacturers claims and instructions. The clai

47、ms shall be checked against the instructions and shall be valid.Notwithstanding the requirements in this standard, any new designs, materials and methods of assembly are permissible provided that at least equivalent results are achieved.6 General conditions of test6.1 Test roomThe test room shall be

48、 adequately ventilated but free from draughts that are likely to affect the performance of the appliance.The temperature in the test room shall be maintained at (20 5) C.BS 5990:20066 BSI 2006The air in the test room, and any external air supply, shall contain not more than 1 000 parts per million (

49、0.1% (V/V) of carbon dioxide, 10 parts per million (0.001% (V/V) of carbon monoxide, 0.5 parts per million (0.000 05% (V/V) of nitric oxide or 0.5 parts per million (0.000 05% (V/V) of nitrogen dioxide.6.2 Preparation of appliance for testThe appliance shall be set up in accordance with the manufacturers instructions, with particular reference to minimum declared clearances round the appliance. It shall then be adjusted in accordance with the manufacturers instructions using the test g