1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58water heaters for beverageThe European Standard EN 203-2-6:2005 has the status of a British Standar
2、dICS 97.040.20Gas heated catering equipment Part 2-6: Specific requirements Hot BRITISH STANDARDBS EN 203-2-6:2005BS EN 203-2-6:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 November 2005 BSI 25 November 2005ISBN 0 580 46898 4A list
3、of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards C
4、orrespondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This 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 does n
5、ot of itself confer immunity from legal obligations.promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issue
6、d.Amendments issued since publicationAmd. No. Date CommentsThe UK participation in its preparation was entrusted to Technical Committee GSE/19, Catering equipment (gas), which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee
7、 any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and National forewordThis British Standard is the official English language version of EN 203-2-6:2005. Together with BS EN 203-2-1, BS EN 203-2-2, B
8、S EN 203-2-3, BS EN 203-2-4, BS EN 203-2-5, BS EN 203-2-7, BS EN 203-2-8, BS EN 203-2-9, BS EN 203-2-10 and BS EN 203-2-11 it will supersede BS EN 203-2:1995 which will be withdrawn on the publication of all the above mentioned sub-partsAt the time of publication of this British Standard, EN 203-2-2
9、, EN 203-2-7, EN 203-2-10 and EN 203-2-11 were still in development.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 203-2-6October 2005ICS 97.040.20 Supersedes EN 203-2:1995 English VersionGas heated catering equipment - Part 2-6: Specific requirements- Hot water heaters for beverageAppareils de c
10、uisson professionnelle utilisant lescombustibles gazeux - Partie 2-6: Exigences particulires -Gnrateurs deau chaude pour boissonGrokchengerte fr gasfrmige Brennstoffe - Teil 2-6:Spezifische Anforderungen - Wasserkocher frGetrnkezubereiterThis European Standard was approved by CEN on 22 July 2005.CEN
11、 members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on applic
12、ation to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the
13、same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Sl
14、ovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN na
15、tional Members.Ref. No. EN 203-2-6:2005: EEN 203-2-6:2005 (E) 2 Contents Foreword . 3 1 Scope. 4 2 Normative references. 4 6.3.2.2 Protection against burns . 5 6.3.2.2.1 Control knobs or other handles . 5 6.8.2 Pressurised parts . 5 6.10 Rational use of energy . 5 7.8.1 Stability and mechanical safe
16、ty 5 7.101 Rational use of energy . 6 7.101.1 Efficiency calculation 6 7.101.2 Water boiling appliances (continuous flow) 6 7.101.3 Expansion water boiling appliances 7 7.101.4 Pressure water boiling appliances. 7 7.101.5 Bulk water boiling appliances 7 9.2.1 Data plates and labels 8 9.3.3 Instructi
17、ons for installation and adjustment 8 Annex ZA. 9 EN 203-2-6:2005 (E) 3 Foreword This European Standard (EN 203-2-6:2005) has been prepared by Technical Committee CEN/TC 106 “Large kitchen appliances using gaseous fuels”, the secretariat of which is held by AFNOR. This European Standard shall be giv
18、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by December 2008. This European Standard has been prepared under a mandate given to CEN by the European
19、 Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. This European Standard supersedes EN 203-2:1995, together with EN 203-2-1
20、, EN 203-2-2, EN 203-2-3, EN 203-2-4, EN 203-2-5, EN 203-2-7, EN 203-2-8, EN 203-2-9, EN 203-2-10 and EN 203-2-11. This European Standard specifies the safety and rational use of energy requirements for hot water heaters for beverage. This European Standard has to be used in conjunction with EN 203-
21、1 Gas Heated Catering Equipment Part 1 General safety rules. This sub-part of part 2 supplements or modifies the corresponding clauses of EN 203-1, so as to convert it into the European Standard for gas heated hot water heaters for beverage. Where a particular sub-clause of EN 203-1 is not mentioned
22、 in this sub-part of part 2, that sub-clause applies as far as is reasonable. Where this standard states “addition“, “modification“ or “replacement“, the relevant text of EN 203-1 is to be adapted accordingly. Subclauses and figures which are additional to those in EN 203-1 are numbered starting wit
23、h 101. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat
24、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 203-2-6:2005 (E) 4 1 Scope Addition: This European Standard specifies the test methods and requirements for the construction and operating characteristics r
25、elating to the safety, rational use of energy and marking, of Commercial Gas Heated Water Boiling and Heating Appliances for Beverage Making. This European Standard only covers type testing. 2 Normative references Addition: EN 203-1:2005, Gas Heated Catering Equipment Part 1 General safety rules EN
26、1717, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow 3.3.101 pressure water boiler appliance in which water is boiled and pressurised, to provide a bulk supply and thereafter a continuous supply of boiling wat
27、er. Drawn off water is replaced automatically so that a constant supply of boiling water is available. It may also be provided with a steam injector 3.3.102 expansion boiler appliance which relies on the expansion of water when heated, to provide a supply of boiling water. Drawn off water is replace
28、d automatically so that a continuous supply of boiling water is available 3.3.103 bulk boiler appliance in which a bulk quantity of water is heated and boiled. When drawn off, the appliance is re-filled manually and the cycle is re-started 3.3.104 coffee machine appliance fitted with a steam or supe
29、rheated water generator to a coffee filtration system. It may also be provided with a steam injector 3.3.105 coffee percolator appliance which supplies boiling water to a coffee filtration system 3.3.106 jacketed urn appliance supplied with an inner container for the storage of pre-heated milk or pr
30、e- prepared beverages, surrounded by a heated water or steam jacket 3.3.107 indicated level permanent mark on the appliance to indicate the maximum level for correct operation 3.3.108 nominal volume Vnmanufacturers declared working volume (if applicable) when filled to the indicated level EN 203-2-6
31、:2005 (E) 5 6.3.2.2 Protection against burns Addition: The following are designated as working areas: internal and external surfaces of covers, draw off tap bodies, steam injector bodies and flue outlets. During the test of 7.101 no overflow of water shall be allowed. The outlet of draw off taps and
32、 steam injectors on pressurised appliances shall be designed to minimise turbulence and splashes. 6.3.2.2.1 Control knobs or other handles Addition: Handles for draw off taps, steam injectors and covers shall conform to this requirement. 6.8.2 Pressurised parts Addition: Pressurised appliances shall
33、 be fitted, in addition of pressure regulator(s), with relief valves of which the calibrated pressure and relief cannot be modified. The relief valve(s) shall be located in such a way to not be a risk in case of opening. The lockout mechanism(s) of the cover shall be design to prevent any unintended
34、 under pressure opening. It shall not be possible to open the lid or cover of a pressurised appliance until the pressure has been reduced to approximately atmospheric pressure. Pressurised appliances shall incorporate a vacuum release device to prevent a partial vacuum forming unless they are design
35、ed for vacuum operation. In every case pressurised appliances shall satisfy the pressure tests of 7.8.2 of EN 203-1:2005. Note The requirements of the pressure equipments directive 97/23/EEC are applicable to water boiling appliances of continuous flow of a capacity greater than 2 litres and working
36、 at a pressure greater than 0,5 bar. 6.10 Rational use of energy Jacketed urns and coffee machines are not subject to this requirement. When tested in accordance with 7.101 the efficiency shall not be less than: - Continuous flow water boiling appliances: 60 %; - Bulk water boiling appliances: 50 %.
37、 7.8.1 Stability and mechanical safety Addition: The requirements of 6.8.1 of EN 203-1:2005 shall be satisfied when the tests are carried out with the appliance empty and with the appliance filled with water to its indicated level. EN 203-2-6:2005 (E) 6 7.101 Rational use of energy 7.101.1 Efficienc
38、y calculation At the end of the tests in 7.101.2 to 7.101.5 after extinction of the burner, the maximum water temperature attained is measured. The efficiency is given by: RmC(t t )VH100=p21ciwhere R is the efficiency, in percent; m is the mass of water in kilograms; Cpis the specific heat of water
39、4,186 x 10-3MJ/(kg.K); t1is the initial water temperature in degrees Celsius; t2 is the final water temperature in degrees Celsius; Vc is the volume or mass of gas burned in cubic metres or kilograms; Hiis the net calorific value of the gas in megajoules per cubic metre or megajoules per kilogram. T
40、he volume of the gas consumed determined from the volume measured is given by: VVppptcmesasg1013,25288,15273,15=+where Vmesis the volume of gas measured in cubic metres; pais the atmospheric pressure in millibars; p is the supply pressure of the gas at the point of measurement of the heat input in m
41、illibars; psis the partial pressure of water vapour in millibars (as defined in 7.3.2.1 of EN 203-1:2005); tgis the temperature of gas at the point of measurement of heat input in degrees Celsius. 7.101.2 Water boiling appliances (continuous flow) The appliance shall be set up in accordance with the
42、 conditions specified in 7.1.4 of EN 203-1:2005, special precautions being taken to ensure the following factors are closely controlled: a) during the test, the cold water inlet temperature should not vary by more than 2 oC; b) appliance shall be levelled, and the ball valve in the cistern or within
43、 the boiler shall be adjusted, if necessary, so that the water is 3 mm of the indicated level. EN 203-2-6:2005 (E) 7 7.101.3 Expansion water boiling appliances If an adjustable by-pass is provided, it is set to a rate just sufficient to maintain water at not more than 95 oC. The bypass gas rate is m
44、easured. Insert thermometers, or equivalent, in the feed water system and into a T or other convenient pocket attached to the boiling water outlet, t1and t2are respectively measured at these points. Set the appliance in accordance with the manufacturers instructions to give continuous delivery of bo
45、iling water, with the minimum formation of water vapour, and allow it to run for at least 15 min before commencing testing. Collect and weigh not less than 15 kg of water in a covered vessel, and note the temperature of the water and the gas consumed. 7.101.4 Pressure water boiling appliances If an
46、adjustable bypass is provided, it is set to a rate just sufficient to maintain steam pressure. Insert thermometers, or equivalent, in the feed water system and in a T or other convenient pocket attachment to the boiling water outlet, t1and t2are respectively measured at these points. Set the applian
47、ce in accordance with the manufacturers instructions and allow the appliance to attain equilibrium condition, with the boiler filled with water. With the gas off (or at bypass rate when fitted) note the meter reading. Open the draw off tap and collect the boiling water in a weighed covered container
48、. Allow the water level to fall to the low level mark, turn off the draw off tap and weigh the water collected. Allow the boiler to refill and the gas to extinguish or reduce to bypass rate and note the gas consumed. 7.101.5 Bulk water boiling appliances The burner is adjusted to its nominal rate. T
49、he boiler is filled with water to its indicated level (stated by the manufacturer) the water being at a temperature of approximately 15 oC. If an automatic water level is fitted, it should be adjusted, if necessary, to 3 mm of the indicated level, and the interconnecting valve turned off when the boiler is filled. The water temperature is taken as near as possible to the centre of the container, 10 cm below the water surface. Tests are carried out with the cover closed. The burner is ignited and
