《BS-EN-625-1996.pdf》由会员分享,可在线阅读,更多相关《BS-EN-625-1996.pdf(22页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 625:1996 Gas-fired central heating boilers Specific requirements for the domestic hot water operation of combination boilers of nominal heat input not exceeding 70 kw The European Standard EN 625:1995 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun,
2、 na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 625:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1996 BSI 08-1999 The followin
3、g BSI references relate to the work on this standard: Committee reference GSE/29 Draft for comment 92/71976 DC ISBN 0 580 25367 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GSE/29, Domestic gas-fired central heating
4、boilers, upon which the following bodies were represented: Association of Manufacturers of Domestic Unvented Supply Systems Equipment (MODUSSE) Boilers and Radiator Manufacturers Association Limited British Gas plc Department of the Environment (Building Research Establishment) Department of the Env
5、ironment (Property and Buildings Directorate) Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Society of British Gas Industries Co-opted members Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 1
6、3 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 625:1996 BSI 08-1999i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 625 5 List of references Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 20
7、06, Uncontrolled Copy, (c) BSI BS EN 625:1996 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction of the Engineering Sector Board and is the English language version of EN 625:1995 Gas-fired central heating boilers Specific requirements for the domestic hot w
8、ater operation of combination boilers of nominal heat input not exceeding 70 kW, published by the European Committee for Standardization (CEN). EN 625 was produced as the result of international discussion in which the UK took an active part. There has previously been no direct British Standard equi
9、valent to this standard. It is assumed that the execution of the provisions of this document is entrusted to suitably qualified and experienced persons. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their cor
10、rect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard EN 297:1994BS EN 297:1994 Gas-fired central heating boilers Type B11 and B11BS boilers fitted with atmospheric burner
11、s of nominal heat input not exceeding 70 kW. EN 437:1994BS EN 437:1994 Specification for test gases, test pressures and categories of appliance, for gas appliances Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 16, an insi
12、de 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 amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c
13、) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 625 September 1995 ICS 27.060.30; 91.140.10; 91.140.60 Descriptors: Heaters, gas appliances, central heating, water production, boilers, burners, definitions, equipment specifications, performance evaluation, tests, safety, energy, consumpti
14、on, operating requirements, marking, name plates, classifications English version Gas-fired central heating boilers Specific requirements for the domestic hot water operation of combination boilers of nominal heat input not exceeding 70 kW Chaudires de chauffage central utilisant les combustible gaz
15、eux Exigences spcifiques la fonction eau chaude sanitaire des chaudires deux services dont le dbit calorifique nominal est infrieur ou gal 70 kW Heizkessel fr gasfrmige Brennstoffe Spezielle Anforderungen an die Trinkwasserseitige Funktion von Kombi-Kesseln mit einer Nennwrmebelastung kleiner als od
16、er gleich 70 kW This European Standard was approved by CEN on 1995-03-06. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliogr
17、aphical references concerning such national standards may be obtained on application 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 translation under the responsibility of a
18、CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spa
19、in, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all
20、 countries to CEN and its members. Ref. No. EN 625:1995 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 625:1995 BSI 08-1999 2 Foreword This European Standard was prepared by Technical Committee CEN/TC 109, Central heating boilers using
21、 gaseous fuels, of which the secretariat is held by NNI. Other types of boiler including boilers of higher nominal heat input which are excluded from this European Standard are dealt with in separate standards. This European Standard has been prepared under a mandate granted to CEN by the European C
22、ommission and the European Free Trade Association, and supports the essential requirements of the EU Directive. In particular, matters which relate to quality assurance systems, production tests and the certification of auxiliary controls are not dealt with in this standard. In respect of potential
23、adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: 1) This standard provides no information as to whether the product may be used without restriction in any of the member states of the EU or EFTA. 2) It should be noted that, while
24、awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. In compliance with the common rules of CEN/CENELEC, the following countries are bound to apply this European Standard: Austria, Belgium,
25、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. For relationship with EU Directives, see informative Annex ZA, which is an integral part of this standard. This European Standard shall be gi
26、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1996, and conflicting national standards shall be withdrawn at the latest by March 1996. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontr
27、olled Copy, (c) BSI EN 625:1995 BSI 08-19993 Contents Page Foreword 2 1Scope5 2Normative references5 3Definitions5 3.1Combination boiler5 3.2“Summer” operating mode5 3.3Specific rate5 3.4Nominal domestic hot water heat input5 3.5Maximum water service pressure5 3.6Tank5 3.7Thermal store5 3.8Temperatu
28、re relief valve6 3.9Proportional control of the domestic hot water operation6 3.10Thermostatic control of the domestic hot water operation6 3.11Temperature holding thermostat6 4Constructional requirements6 4.1Materials and method of construction of components of the domestic water circuit6 4.2Domest
29、ic water connections6 4.3Soundness of the domestic water circuit6 4.4Adjusting, control and safety devices for the domestic hot water circuit6 5Operational requirements6 5.1General6 5.2Safety of the domestic hot water circuit7 5.2.1Instantaneous and storage types7 5.2.2Instantaneous type7 5.2.3Stora
30、ge type7 5.3Rational use of energy7 5.3.1Useful efficiency7 5.3.2Losses7 5.4Fitness for purpose7 5.4.1Instantaneous and storage types Specific rate7 5.4.2Instantaneous type7 6Test methods8 6.1General8 6.1.1Adjustment of the domestic water pressure8 Page 6.1.2Operation of the boiler8 6.2Safety of the
31、 domestic hot water circuit8 6.2.1Instantaneous and storage types8 6.2.2Instantaneous type8 6.2.3Storage type9 6.3Rational use of energy9 6.3.1Useful efficiency9 6.3.2Losses9 6.4Fitness for purpose11 6.4.1Instantaneous and storage types Specific water rate11 6.4.2Instantaneous type11 7Marking and in
32、structions12 7.1Data plate of the boiler and/or the tank12 7.2Instructions12 7.2.1Technical instructions for the installer12 7.2.2Operating instructions for the user12 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives14 Fi
33、gure 1 Illustration of the test tank rig see 6.3.2.1.3 a) 13 Table ZA.115 Table ZA.216 Table ZA.316 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncon
34、trolled Copy, (c) BSI EN 625:1995 BSI 08-19995 1 Scope This standard supplements standards EN 297, prEN 483 and prEN 677, hereafter called “boiler standards”. It specifies the supplementary requirements and tests for the construction, safety, rational use of energy, fitness for purpose, classificati
35、on and marking related to the domestic hot water operation of combination boilers. The domestic hot water is produced by either the instantaneous or storage principle. The domestic hot water production is integrated or coupled, and the whole being marketed as a single unit. This standard does not ap
36、ply to two appliances included in the same case which operate independently of each other, a boiler and a water heater, even if they have a common flue. This standard only covers type testing. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from o
37、ther publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For the dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or re
38、vision. For undated references, the latest edition of the publication referred to applies. EN 297:1994, Gas-fired central heating boilers Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW. EN 297/prA2, Gas-fired central heating boilers Type B11 and
39、B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW (determination of efficiency). EN 437, Test gases Test pressures Appliance categories. prEN 483, Gas-fired central heating boilers with atmospheric burners Type C boilers of nominal heat input not exceeding 70 kW
40、. prEN 677, Gas-fired central heating boilers Specific requirements for condensing boilers with nominal heat input not exceeding 70 kW. ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Designation, dimensions and tolerances. ISO 228-1, Pipe threads where pressure-tig
41、ht joints are not made on the threads Part 1: Designation, dimensions and tolerances. ISO 274, Copper tubes of circular section Dimensions. 3 Definitions For the purposes of this standard the following definitions apply. 3.1 combination boiler boiler designed both for central heating and for the pro
42、duction of domestic hot water. Depending on its type of domestic hot water production, the combination boiler is classed as follows, in accordance with the manufacturers declaration instantaneous type Combination boilers which can continuously supply the specific domestic hot water rate D stated by
43、the manufacturer. storage type Combination boilers which can intermittently supply the specific domestic hot water rate D stated by the manufacturer. 3.2 “summer” operating mode operating mode in which the boiler only provides heating of the domestic water 3.3 specific rate the domestic hot water ra
44、te declared by the manufacturer, corresponding to a mean temperature rise of 30 K, that the boiler can supply in two successive delivery periods Symbol: D; Unit: litres per minute (l/min). 3.4 nominal domestic hot water heat input the value of the heat input in the domestic hot water mode indicated
45、by the manufacturer Symbol: Qnw; Unit: kilowatt (kW). 3.5 maximum water service pressure the maximum pressure permitted in the domestic water circuit, as declared by the manufacturer Symbol: PMW; Unit: bar. 3.6 tank reservoir of domestic water 3.7 thermal store heat reservoir sited mainly in heating
46、 water, as opposed to the domestic hot water storage in the tank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 16:13:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 625:1995 6 BSI 08-1999 3.8 temperature relief valve a valve that opens automatically at a given temperature of maximum 100 C
47、to discharge the domestic hot water 3.9 proportional control of the domestic hot water operation means of control in which the gas rate is subordinated proportionally to the domestic hot water rate; the proportioning factor may be adjustable 3.10 thermostatic control of the domestic hot water operat
48、ion means of control in which the gas rate is subordinated to a thermostatic device controlling the domestic hot water temperature, the set point of the device may be adjustable 3.11 temperature holding thermostat a device which maintains the water in the tank or the thermal store at a given tempera
49、ture 4 Constructional requirements It is checked that the assembly meets constructional requirements by visual examination of the boiler and possibly the tank, and also by inspection of the technical file. 4.1 Materials and method of construction of components of the domestic water circuit Materials shall be appropriate for their use, under intended application and at the maximum water pressure stated by the manufacturer. The requirements relating to thermal insulation and its use specified in the “boiler standar
链接地址:https://www.31doc.com/p-3748945.html