1、STD*BSI BS EM 303-b-ENGL 2000 H 3b24bb7 084bZUO 331 BRITISH STANDARD Heating boilers - Part 6: Heating boilers with forced draught burners - Specific requirements for the domestic hot water operation of combination boilers with atomizing oil burners of nominal heat input not exceeding 70 kW The Euro
2、pean Standard EN 303-6:2000 has the status of a British standard ICs 91.140.10; 91.140. NO COPYING WITHO BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGW LAW BS EN 303-62000 BS EN 303-6:2000 Amd. No. National foreword Date Comments This British Standard is the official English ianguage version of EN 3
3、03-6:2000. The UK participation in its preparation was entrused to Technical Committee RHE/lO, Heating boilers, which has the responsibility to: - aid enquirers to understand the tea - present to the responsible European committee any enquiries on the - monitor related international and European dev
4、elopments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK. A list of organizations represented on this commitke can be obtained on request to its secretary. Cross-references The British Stan- which implement international or European publica
5、tions referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ail the nece- provisions
6、 of a contract. Users of British Standards are responsible for their correct application. Compliance with 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, the EN title page, pages 2 to 17 and
7、back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 M
8、ay 2000 O BSI 062000 ISBN O 580 35803 8 Amendments issued since publication STD=BSI BS EN 303-b-ENGL 2000 111 Lb24bb7 OBLib202 TO4 EUROPEAN STANDARD NORME EUROPEENNE EUROPASCHE NORM EN 303-6 January 2000 _ ICs 91.140.10 English version Heating boilers - Part 6: Heating boilers with forced draught bu
9、rners - Specific requirements for the domestic hot water operation of combination boilers with atomizing oil burners of nominal heat input not exceeding 70 kW Chaudires de chauffage - Partie 6: Chaudires avec brleurs air souffl - Exigences spcifiques la fonction eau chaude sanitaire des chaudires de
10、ux services avec bruleurs fioul pulvrisation dont le dbit calorique nominal est infrieure ou gale 70 kW Heizkessel - Teil 6: Heizkessel mit Geblsebrenner - Spezielle Anforderungen an die trinkwasserseitige Funktion von Kombi-Kesseln mit Olzerstubungsbrennem mit einer Nenwrmeleistung kleiner als oder
11、 gleich 70 kW This European Standard was approved by CEN on 21 November 1999. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this Europan Standard the status of a national standard without any aiieration. Up-to-date lists and bibli
12、ographical references concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three oficial versions (English, French, German). A version in any other language made by traislation under the responsibility of
13、a CEN member into its own language ans notified to the Central Secretariat has the same status as he official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
14、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 B-1050 Brussels (B 2000 CEN All rights of exploitation in any form and by any means reserved worl
15、dwide for CEN national Members. Ref. No. EN 303-6:2000 E STDOBSI BS EN 303-b-ENGL 2000 = lb24bb9 084b203 940 I Page 2 EN 303-6:2000 Contents Page Foreword 3 i Scope . 4 2 Normative references . 4 3 Definitions . 4 4 Constructional requirements . 5 5 Operational requirements . 6 6 Test methods 7 7 Ma
16、rking and instructions . 13 Annex A (informative) A-deviations . 15 8 BSI 052000 STDOBSI BS EN 303-b-ENGL 2000 = Lb2Libb7 OA4b20Li 887 B Page 3 EN 303-612000 Foreword This European Standard has been prepared by Technical Committee CENITC 57, Central heating boilers, the Secretariat of which is held
17、by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2000, and conflicting national standards shall be withdrawn at the latest by July 2000. According to the CENICENELEC internal Regulatio
18、ns, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the Unite
19、d Kingdom. The following structure is intended for the European standards for heating boilers: EN 303-1 Heating boilers - Part 1 : Heating boilers with forced draught burners - Terminology, general requirements, testing and marking EN 303-2 Heating boilers - Part 2: Heating boilers with forced draug
20、ht burners - Special requirements for boilers with atomizing oil burners EN 303-3 Heating boilers - Part 3: Gas fired central heating boilers - Assembly comprising a boiler body and a forced draught burner EN 303-4 Heating boilers - Part 4: Heating boilers with forced draught burners - Special requi
21、rements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum operating pressure of 3 bar - Terminology, special requirements, testing and marking EN 303-5 Heating boilers - Part 5: Special heating boilers for solid fuels, hand and automatically stoked, nominal heat outp
22、ut of up to 300 kW - Terminology, requirements, testing and marking EN 304 Heating boilers - Test code for heating boilers for atomizing oil burners Annex A of this European Standard is informative. Q BSI 05-2000 Page 4 EN 303-6:2000 I Scope This standard supplements EN 303-1, EN 303-2, EN 3034 and
23、EN 304/Al hereafter called boiler standards. It specifies the supplementary requirements and tests for the construction, safety, rational use of energy, fitness for purpose, classification and marking related to the domestic hot water operation of oil-fired combination boilers of nominal heat output
24、 not exceeding 70 kW. The domestic hot water is produced on either the instantaneous or storage principle. The domestic hot water production is integrated or coupled, the whole being marketed as a single unit. This standard does not apply to appliances which operate independently of each other - a b
25、oiler and a water heater - even if they have a common flue. Neither does the standard apply to a boiler and water storage tank which are not included within the same casing. This standard only covers type testing. 2 Nonnative references This European Standard incorporates by dated or undated referen
26、ce, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporate
27、d in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 303-1:1999 Heating boilers - Part I: Heating boilers with forced draught burners - Terminology, general requirements, testing and marking EN 303-2 Heating boilers - Part 2: Heating
28、boilers with forced draught burners - Special requirements for boilers with atomizing oil burners EN 304/A1 Heating boilers - Test code for heating boilers for atomizing oil burners; Amendment Al IS0 7-1 Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerance
29、s and designation I ISO 228-1 Pipe threads where pressure-tight joints are not made on the threads - Patt I: Dimensions, tolerances and designation IS0 274 Copper tubes of circular section - Dimensions 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 combination
30、boiler: boiler designed both for central heating and for the production 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 A combination boiler which can c
31、ontinuously supply the specific domestic hot water rate “D“ stated by the manufacturer. Q BSI 05-2000 Page 5 EN 303-612000 - storage type A combination boiler which can intermittently supply the specific domestic hot water rate “D“ stated by the manufacturer. 3.2 summer operating mode: operating mod
32、e in which the boiler only provides heating of the domestic water. 3.3 specific rate: the domestic hot water rate declared by the manufacturer, corresponding to a mean temperature rise of 30 K, that the boiler can supply in two successive delivery periods. Symbol: ; Unit: litres per minute (Vmin). 3
33、.4 nominal domestic hot water heat input: the value of the heat input in the domestic hot water mode indicated by the manufacturer. Symbol: Q,; Unit: kilowatts (kW). 3.5 maximum water service pressure: the maximum pressure permitted in the domestic water circuit, as declared by the manufacturer. Sym
34、bol: PMS; Unit: bar. 3.6 tank: reservoir of domestic water. 3.7 thermal store: heat reservoir sited mainly in heating water, as opposed to the domestic hot water storage in the tank. 3.8 pressure relief valve: a valve that opens automatically at a given pressure to discharge hot water. 3.9 thermosta
35、tic control of the domestic hot water operation: means of control in which the fuel rate is subordinated to a thermostatic device controlling the domestic hot water temperature, the set point of the device may be adjustable. 3.10 temperature holding thermostat: a device which maintains the water in
36、the tank or the thermal store at a given temperature. 3.1 1 low inertia thermometer: means a measuring instrument with a response time such that 90 % of the final temperature rise, in the range 15 “C to 100 OC, is obtained within 5 s when the sensor is plunged into still water. 4 Constructional requ
37、irements It is checked that the assembly meets the 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
38、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 standards about boilers only apply to parts of the domestic water circuit likely to come into contact with flames or si
39、ted close to the combustion products outlet. The materials of the parts containing domestic water shall not affect the quality of the domestic water in respect of either health or taste. The whole of the domestic hot water circuit shall be made up of corrosion resistant materials or shall be protect
40、ed against corrosion. O BSI 052000 STDaBSI BS EN 303-b-ENGL 2000 I Lb24bb9 08qb207 57b 0 Page 6 EN 303-6:2000 4.2 Domestic water connections Threaded connections shall comply with IS0 2251 or IS0 7-1. If copper tubes are used for the connection, the end of the tube shall comply with IS0 274. In acco
41、rdance with the manufacturers instructions, the domestic water circuit shall be able to be drained, without the discharge of water compromising electrical safety. 4.3 Soundness of the domestic water circuit The domestic hot water circuit and the heating circuit shall be separate. If an actuator or a
42、 control has a sliding shaft or a link with the diaphragm separating the heating water circuit and the domestic water circuit there shall be an air vent between these circuits. The area of this aperture shall be at least 19 mm2 and it shall be possible to introduce a 33 mm pin gauge into it. 4.4 Adj
43、usting, control and safety devices for the domestic hot water circuit The domestic hot water circuit shall be fitted with control and safety devices necessary to comply with the requirements Thermostats and limiting devices of 4.1 515 of EN 303-1:1999. The tank shall be fitted with a device for cont
44、rolling the water temperature. This device shall allow a temperature to be attained which is sufficient to prevent the build up of bacteria (see 5.2.3.3). When local installations require a temperature relief valve operating at 100 OC, any device controlling the temperature of the domestic hot water
45、 shall act before this valve. 5 Operational requirements 5.1 General If the nominal heat input in domestic hot water mode exceeds the nominal heat input in the central heating mode, the combination boiler shall be tested according to the EN 303-2 at the nominal heat input in the domestic hot water m
46、ode. A combination boiler certified with an atomizing oil burner will also meet the requirements of this standard if the same boiler is fixed with a forced draught burner for gaseous fuels. 5.2 Safety of the domestic hot water circuit 5.2.1 Instantaneous and storage types 5.2.1.1 Soundness of parts
47、containing domestic water Under the test conditions of 6.2.1.1, the parts containing domestic water shall withstand the test pressure without permanent distortion or soundness defects, with respect to the outside or the heating circuit. 5.2.1.2 Overheating of the domestic hot water by the heating ci
48、rcuit Under the test conditions of 6.2.1.2, the domestic hot water temperature shall not exceed 95C. 5.2.1.3 Failure of the domestic hot water temperature control device Under the test conditions of 6.2.1.3, in the domestic water mode and in the event of failure of the normal control the requirement
49、s for safety limiter (see 4.1.5.15 of EN 303-1:1999) concerning the limit thermostat or the safety temperature limiter shall be met. 5.2.2 Instantaneous type 5.2.2.1 Maximum domestic hot water temperature Under the test conditions of 6.2.2.1, the domestic hot water temperature shall not exceed 95C. Q BSI 05-2000 STD-BSI BS EN 3U3-b-ENGL 2000 Lb2LibbS OBYb208 Li22 Page 7 EN 303-6:2000 5.2.2.2 Overheating of the domestic hot water Under the test conditions of 6.2.2.2, the domestic hot water temperature shall not exceed 95C. 5.2.3 Storage type 5.2.3.1 M
