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1、BRITISH STANDARD BS 5258-17: 1992 Safety of domestic gas appliances Part 17: Specification for direct gas-fired tumble dryers (2nd and 3rd family gases) Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 This British Standard, h
2、aving been prepared under the direction of the Gas Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 1 April 1992 BSI 06-1999 The following BSI references relate to the work on this standard: Committee reference GSE/37 Draft for comment 90/
3、81259 DC ISBN 0 580 20339 5 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/37, upon which the following bodies were represented: Association for Consumer Research (ACRE)
4、British Gas plc Calor Appliances Testing Laboratories Consumer Policy Committee of BSI Department of Trade and Industry (Consumer Safety Unit, CA Division) Gas Consumers Council Society of British Gas Industries Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun shef
5、fieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 BSI 06-1999i Contents Page Committees responsibleInside front cover Forewordii Section 1. General 1Scope1 2Definitions1 3Classification of appliances2 4General requirements2 5General conditions of test2 Secti
6、on 2. Safety requirements and associated methods of test 6General design and construction4 7Soundness7 8Heat input7 9Combustion9 10Ignition10 11Ignition system11 12Flame stability11 13Sooting12 14Duct system13 15Fire hazard and limiting temperatures13 16Cyclic operation test15 17Manual controls16 18
7、Automatic controls16 19Full sequence automatic control systems18 20Associated electrical, constructional and design requirements18 21Users instructions19 22Installation and servicing19 Appendix A Method of test for resistance to airborne lint22 Appendix B Calculation of reference gas heat input25 Fi
8、gure 1 Pressure differentials for lint resistance test6 Figure 2 Standard test finger8 Figure 3 Bubble leak indicator8 Figure 4 Apparatus for measuring floor and wall temperatures14 Figure 5 Test board for measuring temperatures above an appliance14 Figure 6 Position of baffle with respect to lint g
9、enerator outlet duct23 Figure 7 Lint generator24 Figure 8 Lint filter25 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 ii BSI 06-1999 Foreword This Part of BS 5258 has been prepare
10、d 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 direct gas-fired tumble dryers for burning 2nd and 3rd family gases. In common with other Parts of BS 5258 currently being revised and pre
11、pared, this Part can be applied to all production appliances through a recognized scheme of quality assurance, whereas originally the Parts were written with type approval in mind. The intention is that all appliances manufactured in accordance with this standard will be safe in normal use when inst
12、alled and maintained in accordance with the relevant British Standard codes of practice and with the manufacturers instructions. Attention is also drawn to the requirements of the Gas Safety (Installation and Use) Regulations, the Low Voltage Electrical Equipment (Safety) Regulations and the various
13、 Building Regulations. The following Parts of BS 5258 are already published: Part 1: Specification for central heating boilers and circulators; Part 2: Cooking appliances (obsolescent); Part 4: Specification for fanned-circulation ducted-air heaters; Part 5: Specification for gas fires; Part 6: Spec
14、ification for refrigerators and food freezers; Part 7: Storage water heaters; Part 8: Combined appliances: gas fire/back boiler; Part 9: Specification for combined appliances: fanned-circulation ducted-air heaters/circulators; Part 10: Flueless space heaters (excluding catalytic combustion heaters)
15、(3rd family gases); Part 11: Flueless catalytic combustion heaters (3rd family gases); Part 12: Specification for decorative fuel effect gas appliances (2nd and 3rd family gases); Part 13: Specification for convector heaters; Part 14: Specification for barbecues (3rd family gases); Part 15: Specific
16、ation for combination boilers; Part 16: Specification for inset live fuel effect gas fires (2nd and 3rd family gases). 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
17、a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 26, an inside back cover and back cover. This standard has been updated (see copyright date) and may have had amendm
18、ents incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 BSI 06-19991 Section 1. General 1 Scope This Part of BS 5258 specifies safety require
19、ments and describes associated methods of test for direct gas-fired tumble dryers for domestic purposes having an input rating not exceeding 3 kW and burning 2nd or 3rd family gases. The requirements apply only to appliances in which the burner operation is under control of a full sequence automatic
20、 control system. This Part of BS 5258 applies to type A (flueless appliances), including such appliances so designed that ducting may be connected to the outlet to enable combustion products and moisture to be exhausted outside the room housing the appliance. An appliance intended to be fitted with
21、such a duct is regarded as a flueless appliance. In specifying requirements for appliances burning 2nd or 3rd family gases, it is assumed that 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 pressu
22、re regulator complying with BS 3016. This Part of BS 5258 is not applicable to: a) type B (open flued appliances); b) type C (room sealed appliances); c) tumble dryers designed exclusively for industrial or commercial purposes; d) tumble dryers intended to be used in locations where special conditio
23、ns prevail, such as the presence of a corrosive or explosive atmosphere (dust vapour or gas); e) condensation type tumble dryers wherein the heated air and products of combustion used for the drying process are dehumidified by cooling with water or air; f) tumble dryers intended to be used in vehicl
24、es or on board ships or aircraft, as additional requirements may be necessary. NOTE 1For tumble dryers intended to be used in tropical countries, special requirements may be necessary. NOTE 2The titles of publications referred to in this standard are listed on the inside back cover. 2 Definitions Fo
25、r the purposes of this Part of BS 5258, the definitions given in BS 1179:1967, BS 1179-6 and 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 the
26、 reference test gas 2.2 rated heat input the manufacturers declared heat input for the appropriate reference test gas 2.3 setting pressure the pressure, measured at the test point, that is specified by the manufacturer for the purpose of adjusting the appliance heat input 2.4 cold condition a condit
27、ion of the appliance required for some tests and obtained by allowing the unlit appliance to attain equilibrium at room temperature 2.5 equivalent resistance the resistance to flow in mbar, measured at the outlet of the appliance, which is equivalent to that of the actual flue 2.6 limits of toleranc
28、e of supply voltage 0.90 times the minimum rated voltage and 1.10 times the maximum rated voltage of the appliance 2.7 direct gas-fired tumble dryer an appliance in which textile material is dried by tumbling in a rotating drum through which heated air and products of combustion are forced or induce
29、d by mechanical means 2.8 full sequence automatic control systems a control system which brings the burner into operation from a completely shut-down condition in response to an external demand without manual intervention 2.9 minimum operational rate 80 % of the lowest heat input at which the applia
30、nce is intended to be operated 2.10 volatile lock out a safety shut-down condition of the control system such that restart takes place only after either manual intervention or an interruption of the electrical supply to the control of at least 50 ms duration and its subsequent restoration 2.11 exhau
31、st duct a means of evacuating the moist air produced by the drying process to the outside of the building Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 2 BSI 06-1999 2.12 aerated burner a burner in which the gas flowing thr
32、ough a gas injector induces the primary air for subsequent combustion 2.13 non-aerated burner a burner in which the gas is burned without previous mixture with air 2.14 air inlet any openings in the appliance casing for the supply of combustion air 3 Classification of appliances 3.1 Classification b
33、y category The 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, I, II or III, according to the number of gas families that it is designed to burn. The families are identified by subscripts T, N and L for the 1st,
34、 2nd and 3rd gas families respectively. Subscripts P and B refer to propane and butane respectively. For the purpose of this Part of BS 5258 the following categories of appliance are permitted: Categories IN, IL, IL/B, IL/P Categories IINL, IINL/B, IINL/P Within a given category the changes that are
35、 allowed in adapting an 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-aerate
36、d burner assemblies. 3) 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 whi
37、ch they are designed and the source of the combustion air. This Part of BS 5258 covers type A, i.e. flueless appliances only. NOTEThe relevant definition of this type of appliance is given in BS 1179-6. However, the standard also includes requirements for a duct leading outside, i.e. appliances fitt
38、ed with an exhaust duct. For the purposes of this Part of BS 5258 these appliances are covered by flueless appliances. 4 General requirements The appliance shall comply with this Part of BS 5258 when tested using the specified test gases of the appropriate gas family. NOTE 1Full details of the test
39、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. 5 General conditions of test 5.1 Test room The room shall be adequately ventilated but free from draughts likely to affect the performa
40、nce of the appliance. If the test results are influenced by the temperature of the ambient air, the room temperature shall be maintained at 20 5 C. 5.2 Preparation of appliance The appliance shall be installed and adjusted in accordance with the manufacturers instructions, with particular reference
41、to minimum clearances around the appliance and 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 to a supply at the rated voltage. Before any tests are made the appli
42、ance shall be operated at the maximum setting without a load in the drum for a period sufficient to dry out any insulation and remove any temporary finish that might interfere with observations. 5.3 Test conditions 5.3.1 The test conditions given in 5.3.2 to 5.3.7 shall apply except where otherwise
43、specified in section 2. 5.3.2 The appliance shall be examined for gas soundness both before and after the tests. The test results are deemed invalid unless the system is sound (see clause 7). 5.3.3 The appliance shall be at room temperature at the start of each test. FamilyTest gasInlet pressure 2nd
44、NGA mbara 20 3rdLPGA LPGC 28 37 a 1 mbar = 0.1 kPa = 102 N/m2. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:39:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5258-17:1992 BSI 06-19993 5.3.4 During testing the initial adjustment of the appliance shall not be altered. 5.3.5 Precautions
45、shall be taken to prevent thermostats or other variable controls from acting to interfere with the gas flow except as necessitated by the test. 5.3.6 Unless otherwise stated in section 2, the appliance shall be tested without exhaust ducting fitted. 5.3.7 Test pressure shall be measured correct to 0
46、.2 mbar and the variation in test pressure shall not exceed 0.2 mbar. NOTE 1In general, except for tests involving governor performance, the appliance governor, if any, may be put out of operation and the specified test pressure obtained by adjustment of the gas pressure at the inlet to the applianc
47、e. NOTE 2The test gases (and, where appropriate, their conditions of application) to be used are specified in the relevant clauses of section 2. 5.3.8 Where tests are specified which require the drum of the appliance to be filled with a load, this load shall consist of a quantity of textile material
48、 having a mass in the dry condition equal to the maximum mass specified by the manufacturer. The textile material shall be in the form of pre-washed double hemmed cotton sheets having dimensions of approximately 70 cm 70 cm and a mass between 140 g/m2 and 175 g/m2 in the dry condition. When the load
49、 is required to be wet, the textile material is saturated with a quantity of water having a temperature of 25 5 C and a mass equal to that of the textile material. NOTE 1For the purpose of this Part of BS 5258, cotton having a water content not exceeding 10 % is considered as being in the dry condition. If cotton is conditioned for 24 h in still air having a temperature of 20 2 C, a relative humidity between 60 % and 70 % and a pressure between 860 mbar and 1 060 mbar, cotton will contain approximately 7 % of water.
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