1、BRITISH STANDARD BS5258-9: 1989 Safety of domestic gas appliances Part 9: Specification for combined appliances: fanned-circulation ducted-air heaters/circulators UDC64.0662+644.11:697.362+697.4362:614.8BS5258-9:1989 This British Standard, having been prepared under the directionof the Gas Standards
2、 Policy Committee, was publishedunder the authority ofthe Board ofBSI and comes into effect on 31 October1989 BSI08-1999 The following BSI references relate to the work on this standard: Committee referenceGSE/17 Draft for comment87/72542 DC ISBN 0 580 17564 2 Committees responsible for this British
3、 Standard The preparation of this British Standard was entrusted by the Gas Standards Policy Committee (GSE/-) to Technical CommitteeGSE/17, upon which the following bodies were represented: Association for Consumer Research (ACRE) British Gas plc British Non-ferrous Metals Federation Consumer Polic
4、y Committee of BSI Department of Energy (Energy Efficiency Office) Department of the Environment (Building Research Establishment) Department of Trade and Industry (Consumer Market Division) Department of Trade and Industry (Consumer Safety Unit, CA Division) Gas Consumers Council Institution of Gas
5、 Engineers Liquefied Petroleum Gas Industry Technical Association (UK) National Caravan Council Ltd. Royal Society for the Prevention of Accidents Society of British Gas Industries The following was also represented in the drafting of the standard, through subcommittees and panels: Coopted member Am
6、endments issued since publication Amd. No. Date of issue CommentsBS5258-9:1989 BSI 08-1999 i 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 3 5 General conditions of test 3 Secti
7、on 2. Safety requirements and associated methods of test 6 General design and construction 6 7 Soundness 8 8 Heat input 10 9 Combustion 11 10 Ignition 13 11 Ignition system 14 12 Flame stability 15 13 Sooting 16 14 Flue system 16 15 Fire hazard and limiting temperatures 17 16 Prolonged performance t
8、est 19 17 Manual controls 21 18 Automatic controls 21 19 Electrical safety 24 20 Users instructions 24 21 Installation and servicing 25 Appendix A Method of test for resistance to airborne lint 28 Appendix B Apparatus and conditions for combustion tests on type C 1appliances 34 Appendix C Apparatus
9、and conditions for combustion tests on type C 2appliances 34 Figure 1 Test rig: water side 5 Figure 2 Pressure differential criteria to be applied according to the height of the appliance air inlet 8 Figure 3 Bubble leak indicator 9 Figure 4 Apparatus for measuring floor and wall temperatures 18 Fig
10、ure 5 Position of baffle with respect to lint generator outlet duct 28 Figure 6 Lint generator 31 Figure 7 Lint filter 32 Figure 8 Typical test apparatus for type C 1appliances 33 Figure 9 Test apparatus for type C 2appliances 35 Publications referred to 36BS5258-9:1989 ii BSI 08-1999 Foreword This
11、Part of BS5258 has been prepared under the direction of the Gas Standards Policy Committee to meet the need for a standard specifying the safety requirements and associated methods of test for combined gas-fired fanned-circulation ducted-air heaters and circulators burning1st,2nd and3rd family gases
12、. In common with other Parts of BS5258 currently being revised and prepared, this Part can be applied to all production appliances through a recognized scheme of quality assurance, whereas earlier Parts were written with type approval in mind. The intention is that all appliances manufactured in acc
13、ordance with this standard will be safe in normal use when installed and maintained in accordance with the relevant British Standard codes of practice and with the manufacturers instructions. Furthermore, it should be possible for such servicing as may be necessary to maintain the appliance in a saf
14、e condition to be carried out by a competent fitter without difficulty. This Part of BS5258 has been prepared for this type of combined appliance by taking into account the requirements of Parts1 and4 (see the list below), as appropriate, for the individual units, and adding those requirements relev
15、ant to the combined appliance. While the requirements and methods of test follow existing UK practice, they are in no way intended to prejudice any future negotiations of a European Standard. The codes of practice relevant to this Part of BS5258 are BS5440-1 and BS5440-2, BS5482-1, BS5482-2 and BS54
16、82-3, BS5546 and BS5864. Attention is drawn to the requirements of the Gas Safety (Installation and Use) Regulations, Electrical Equipment Safety Regulations, the Model Water Byelaws and of the various Building Regulations. The following Parts of BS5258 are already published or are, as indicated by
17、an asterisk, in preparation: Part 1: Central heating boilers and circulators; Part 2: Cooking appliances; Part 4: Fanned-circulation ducted-air heaters; Part 5: Gas fires; Part 6: Refrigerators and food freezers; Part 7: Storage water heaters; Part 8: Combined appliances: gas fire/back boiler; Part
18、10: Flueless space heaters (excluding catalytic combustion heaters)(3rd family gases); Part 11: Flueless catalytic combustion heaters(3rd family gases); Part 12: Decorative gas log and other fuel effect appliances; Part 13: Specification for convector heaters; Part 14: Specification for barbecues(3r
19、d family gas); Part 15: Specification for combination boilers*. 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 confer immunity f
20、rom legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to36, 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 amendm
21、ent table on the inside front cover.BS5258-9:1989 BSI 08-1999 1 Section 1. General 1 Scope This Part of BS5258 specifies safety requirements and describes associated methods of test for gas-fired combined appliances consisting of a fanned-circulation ducted-air heater together with a circulator. The
22、 combined appliance is usually of integral construction, the circulator being fitted inside the air heater casing. It also covers fanned-circulation ducted-air heaters which are designed to be fitted with circulators, as a purchasers option. This Part of this standard only applies to circulators int
23、ended for use as an integral part of the combined appliance. Circulators intended for independent use are covered by BS5258-1. It covers appliances in which the rated heat input of the air heater does not exceed60kW 1)and that of the circulator does not exceed8kW 1) . This Part of BS5258 is not appl
24、icable to: a) flueless appliances; b) type C appliances burning3rd family gas; c) appliances incorporating full sequence automatic control systems; d) appliances with premixed gas and air burners; e) appliances designed to make use of the latent heat of condensation of the water vapour in the combus
25、tion products. It does not include the special requirements for appliances for outdoor installation or for appliances with fan-powered combustion circuits or fan-assisted flues. In specifying requirements for appliances burning2nd family gases it is assumed that a meter governor will be fitted and f
26、or appliances burning3rd family gases it is assumed that the gas supply from the container will be governed by a pressure regulator complying with the requirements of BS3016. There are circumstances, particularly in regard to central heating, where means of control may be provided either on the heat
27、ing appliance or as part of the installation; where this option exists it is stated. Where the control forms part of the installation and its application conforms with established practice, no reference to the installation procedure is deemed necessary in this Part of BS5258. The requirements for co
28、ntrols 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. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For
29、 the purposes of this Part of BS5258 the definitions given in BS1179:1967, in BS1179-6 and in the relevant British Standard codes of practice apply, together with the following. 2.1 adjustment pressure the pressure, measured at the test point, that is required to obtain the rated heat input using th
30、e reference test gas 2.2 fan control a temperature activated control that causes the fan to operate when the minimum circulation air temperature is achieved and that stops the operation of the fan when the circulation air temperature is below this minimum 2.3 fanned-circulation ducted-air heater a d
31、ucted-air heater incorporating a fan to move the heated air through the ducting 1) Based on gross calorific value.BS5258-9:1989 2 BSI 08-1999 2.4 circulator an appliance with a rated input not exceeding8kW designed primarily for the supply of domestic hot water in conjunction with a separate storage
32、 vessel and for operation by gravity circulation 2.5 limit control a temperature-actuated control intended to prevent the air discharge temperature from exceeding a specified limit 2.6 limit thermostat the temperature sensing device which actuates a limit control 2.7 minimum operational rate 70% of
33、the minimum rate of the control system 2.8 overheat cut-off device a temperature-actuated, pre-set, non-adjustable device designed to protect an appliance and its surroundings in the event of failure of the limit thermostat 2.9 rated heat input the appliance manufacturers declared heat input for the
34、 appropriate reference test gas 2.10 setting pressure the pressure, measured at the pressure test point, that is specified by the manufacturer for the purpose of adjusting the appliance heat input 2.11 water control thermostat a thermostat intended to control the water flow temperature of a water he
35、ating appliance when in normal operation. The temperature setting is usually, but not necessarily, adjustable by the user 2.12 range-rated appliance an appliance whose rated heat input is adjustable within a specified range 3 Classification of appliances 3.1 Classification by category The category s
36、ystem of appliance classification is described in A.1.3 of BS4947:1984 by which an appliance is denoted by a category numberI,II orIII, according to the number of gas families that it is designed to burn. The families are identified by subscripts T, N and L for the1st,2nd and3rd gas families respect
37、ively. For the purposes of this Part of BS5258, the following categories of appliances are permitted: Categories I T , I N , I L , I L/B , I L/P Categories II TN , II NL , II NL/B , II NL/P Categories III, III TNL/B , III TNL/P 3.2 Classification by flue type For the purposes of this Part of BS5258,
38、 appliances are also classified into the following types according to the flue system for which they are designed and the source of the combustion air. a) Type A: flueless appliances. b) Type B: open-flued appliances.BS5258-9:1989 BSI 08-1999 3 c) Type C: room-sealed appliances. These comprise the f
39、ollowing: 1) Type C 1 : balanced-flue appliances. 2) Type C 2 : Se-duct appliances. NOTE 1This Part of BS5258 does not cover type A appliances or type C appliances burning3rd family gases. NOTE 2The relevant definitions of these types of appliances are given in BS1179-6. 4 General requirements The a
40、ppliance shall comply with this Part of BS5258 when tested using the specified test gases of the appropriate gas family. Full details of the test gases are given in BS4947. NOTEFor purposes of quality assurance, line gas may be used instead of reference test gas but the latter has to be used in case
41、s of dispute. Appliances designed to burn1st family gases shall be suitable for gas groupsG4 andG5 with or without a change of injectors or jets. 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 applian
42、ce. If the test results are influenced by the temperature of the ambient air, the room temperature shall be maintained at20 5 C. 5.2 Preparation of the appliance 5.2.1 All appliances. The appliance shall be set up taking due account of the manufacturers instructions, with particular reference to min
43、imum clearances around the appliance. It shall then be adjusted in accordance with the manufacturers instructions, using the appropriate reference test gas at the following inlet pressure. Except where otherwise specified in section 2, an appliance requiring an electrical supply shall be connected t
44、o a240V50Hz electrical supply. Before any tests are made, the appliance shall be operated at its full working temperature for a period sufficient to dry any insulation and remove any temporary finish that might interfere with observations. 5.2.2 Type B appliances. Except where otherwise specified in
45、 section2, an appliance with a vertical flue outlet shall be tested with1m vertical secondary flue of the same nominal diameter as the flue outlet. The vertical flue shall be made from uninsulated aluminium having a metal thickness less than1mm. An appliance with a horizontal flue outlet shall be fi
46、tted in accordance with the manufacturers instructions; thereafter the vertical flue shall be fitted. The manufacturers instructions shall include the maximum length of horizontal run and the method of adaptation to a vertical flue. 5.2.3 Type C 1appliances. Except where otherwise specified in secti
47、on2, the appliance shall be tested in still air conditions with the flue/air ducts and terminal assembled in accordance with the manufacturers instructions. Due account shall be taken of variations in duct and/or terminal lengths. 5.2.4 Type C 2appliances. Except where otherwise specified in section
48、2, the appliance shall be tested in still air conditions with the connecting ducts assembled in accordance with the manufacturers instructions, but not connected to a test duct. Due account shall be taken of variations in length of the ducts between the appliance and the Se-duct. Family Test gas Inl
49、et pressure mbar a 1st TGA 17.5 2nd NGA 20 3rd LPGA LPGC 28 37 a 1mbar=100N/m 2 =100Pa.BS5258-9:1989 4 BSI 08-1999 5.3 Test rig: water side For the tests specified in clauses10 and16 and for other tests, if desired, the circulator shall be connected to a test rig capable of allowing it to be operated at the rated heat input(s) and at the flow and return temperatures specified in section2. Means shall be provided for measuring the flow and return temperatures and the inlet water temperature to within0.5 C. NOTEA sui
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