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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 255-2 : 1997 The Eu
2、ropean Standard EN 255-2 : 1997 has the status of a British Standard ICS 27.080; 27.200 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors Heating mode Part 2. Testing and requirements
3、for marking for space heating units Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 255-2 : 1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the
4、Standards Board and comes into effect on 15 August 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference RHE/17 Draft for comment 88/73303 DC ISBN 0 580 27668 6 Amendments issued since publication Amd. No.DateText affected Committees responsible for this
5、 British Standard The preparation of this British Standard was entrusted to Technical Committee RHE/17, Testing of heat pumps and air conditioners, upon which the following bodies were represented: British Gas plc British Refrigeration Association Building Services Research and Information Associati
6、on Chartered Institution of Building Services Engineers Department of the Environment (Building Research Establishment) Electricity Association Heating and Ventilating Contractors Association Hevac Association Institute of Refrigeration Institution of Mechanical Engineers Licensed Copy: sheffieldun
7、sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1997i BS EN 255-2 : 1997 National foreword This Part of BS EN 255 has been prepared by Technical Committee RHE/17, and is the English language version of EN 255-2 : 1997 Air conditioners, liquid chilling packages and
8、 heat pumps with electrically driven compressors Heating mode Part 2 : Testing and requirements for marking for space heating units, published by the European Committee for Standardization (CEN). This British Standard is published under the direction of the Engineering Sector Board whose Technical C
9、ommittee RHE/17 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgat
10、e them in the UK. NOTE. International and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. Cross-references Publication referred toCorresponding British Standard BS EN 255 Air conditioners, liquid chilling packages a
11、nd heat pumps with electrically driven compressors Heating mode EN 255-1Part 1 : 1997 Terms, definitions and designations EN 255-3Part 3 : 1997 Testing and requirements for marking for sanitary hot water units EN 255-4Part 4 : 1997 Requirements for space heating and sanitary hot water units BS EN 81
12、4 Air conditioners and heat pumps with electrically driven compressors Cooling mode EN 814-2Part 2 : Testing and requirements for marking 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 fr
13、ont cover, pages i and ii, the EN title page, pages 2 to 12, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iiblank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncon
14、trolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members Ref. No. EN 255-2 : 1997 E EUROPEAN STANDARDEN 255-2 NORME EUROPE ENNE
15、 EUROPA ISCHE NORM February 1997 ICS 27.080; 27.200 Descriptors: Heat pumps, electric motors, heating, refrigerating, tests, measurement, calorific power, specifications, testing conditions, marking English version Air conditioners, liquid chilling packages and heat pumps with electrically driven co
16、mpressors Heating mode Part 2: Testing and requirements for marking for space heating units Climatiseurs, groupes refroidisseurs de liquide et pompes a chaleur avec compresseur entra ne par moteur e lectrique Mode chauffage Partie 2: Essais et exigences de marquage pour les appareils de chauffage de
17、s locaux Luftkonditionierer, Flu ssigkeitsku hlsa tze und Wa rmepumpen mit elektrisch angetriebenen Verdichtern Heizen Teil 2: Pru fungen und Anforderungen an die Kennzeichnung von Gera ten fu r die Raumheizung This European Standard was approved by CEN on 1997-01-27. CEN members are bound to comply
18、 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 bibliographical references concerning such national standards may be obtained on application to the Central Secre
19、tariat 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 CEN member into its own language and notified to the Central Secretariat has the same status as the offic
20、ial versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:
21、12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 BS EN 255-2 : 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 113, Heat pumps and air conditioners, the Secretariat of which is held by AENOR. This standard consists of the following Parts: EN 255-1Air
22、 conditioners, liquid chilling packages and heat pumps with electrically driven compressors Heating mode Part 1: Terms, definitions and designations EN 255-2Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors Heating mode Part 2: Testing and requirements fo
23、r marking for space heating units EN 255-3Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors Heating mode Part 3: Testing and requirements for marking for sanitary hot water units EN 255-4Air conditioners, liquid chilling packages and heat pumps with elect
24、rically driven compressors Heating mode Part 4: Requirements for space heating and sanitary hot water units 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 August 1997, and conflicting national st
25、andards shall be withdrawn at the latest by August 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, It
26、aly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Performance test3 5Test report8 6Marking8 Annex A(informative) Bibliography10 Tables 1Uncertainties of measurement for indicated va
27、lues6 2Environmental conditions and electrical power supply requirements6 3Rating test conditions7 4Permissible deviations from set values7 5Test results9 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 BS EN 255-2 : 1997 BSI 1997 1 S
28、cope This Part of EN 255 specifies methods for testing and reporting of the rating and it specifies requirements for marking of air and water cooled air conditioners, liquid chilling packages, air/air, water/air, air/water and water/water heat pumps with electrically driven compressors when used for
29、 space heating. When these units are used for space cooling, EN 814-2 applies; when these units are used for liquid cooling and heat recovery, EN 12055 applies; when they are used for sanitary hot water, EN 255-3 applies. This standard applies to factory-made units which can be ducted. In the case o
30、f units consisting of several parts, the standard applies only to those designed and supplied as a complete package. Units having two or more indoor sections connected to a single outdoor unit (multiple split system air conditioners or heat pumps) are excluded from this standard. This standard does
31、not apply to continuously variable capacity control units. Installations used in industrial processes are not within the scope of this standard. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references ar
32、e 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 incorporated in it by amendment or revision. For undated references, the latest
33、edition of the publication referred to applies. EN 255-1Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors Heating mode Part 1: Terms, definitions and designations EN 255-3Air conditioners, liquid chilling packages and heat pumps with electrically driven c
34、ompressors Heating mode Part 3: Testing and requirements for marking for sanitary hot water units EN 814-2Air conditioners and heat pumps with electrically driven compressors Cooling mode Part 2: Testing and requirements for marking EN 12055Liquid chilling packages and heat pumps with electrically d
35、riven compressors Cooling mode Definitions, testing and requirements 3 Definitions For the purposes of this standard, the definitions given in EN 255-1 apply. 4 Performance test 4.1 Basic principles 4.1.1 General All measured parameters, with the exception of time measurement shall be understood to
36、be average values over the duration of the test period. 4.1.2 Heating capacity The heating capacity of the air cooled air conditioner and air/air heat pump is determined by measurements in a calorimeter room or by the air enthalpy method. The heating capacity of all other types is determined in acco
37、rdance with the direct method at the water or brine heat exchanger, by determination of the volume flow of the heat transfer medium, and the inlet and outlet temperatures, taking into consideration the specific heat capacity and density of the heat transfer medium. The heating capacity shall be corr
38、ected for the heat from the fan or pump. If the fan or pump at the indoor heat exchanger is an integral part of the unit, the heat from this should not affect the heating capacity greater than the declared value of uncertainty. If the heat is greater, then the same power (calculated in 4.1.4.1 or 4.
39、1.5.1) which is excluded from the input is also subtracted from the heating capacity; If the fan or pump at the indoor heat exchanger is not an integral part of the unit the heat from this should also not affect the heating capacity greater than the declared value of uncertainty. If the heat is grea
40、ter, then the same power (calculated in 4.1.4.2 or 4.1.5.2) which is included in the input is also added to the heating capacity. 4.1.3 Power input of fans for units without duct connection In the case of units which are not designed for duct connection, i.e. which do not permit any external pressur
41、e differences, and which are equipped with an integral fan, the power absorbed by the fan shall be included in the effective power absorbed by the unit. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:30:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 BS EN 255-2 : 1997 BSI 1997 4.1.4
42、 Power input of fans for units with duct connection 4.1.4.1 If a fan is an integral part of the unit, only a fraction of the input of the fan motor shall be included in the effective power absorbed by the unit. The fraction which is to be excluded from the total power absorbed by the unit shall be c
43、alculated using the following formula: in watts qDPe h where: his 0,3 by convention; Dpeis the available external static pressure difference, in pascals; qis the nominal air flow rate, in cubic metres per second. 4.1.4.2 If no fan is provided with the unit, the proportional power input which is to b
44、e included in the effective power absorbed by the unit, shall be calculated using the following formula: in watts qDpi h where: his 0,3 by convention; Dpiis the measured internal static pressure difference, in pascals; qis the nominal air flow rate, in cubic metres per second. 4.1.5 Power input of w
45、ater and brine pump 4.1.5.1 If a pump is an integral part of the unit, only a fraction of the input to the pump motor shall be included in the effective power absorbed by the unit. The fraction which is to be excluded from the total power absorbed by the unit shall be calculated using the following
46、formula: in watts qDpe h where: his 0,3 by convention; Dpeis the available external static pressure difference, in pascals; pis the nominal water flow rate, in cubic metres per second. 4.1.5.2 If no pump is provided with the unit, the proportional power input which is to be included in the effective
47、 power absorbed by the unit, shall be calculated using the following formula: in watts qDpi h where: his 0,3 by convention; Dpiis the measured internal static pressure difference, in pascals; qis the nominal water flow rate, in cubic metres per second. 4.1.5.3 In the case of appliances designed espe
48、cially to operate on a distributing network of pressurized water without water-pump, no correction is to be applied to the power input. 4.2 Test apparatus 4.2.1 Arrangement of the test apparatus 4.2.1.1 General requirements The test apparatus shall be designed in such a way that all requirements on
49、adjustment of set values, stability criteria and uncertainties of measurement according to this European Standard can be fulfilled. Ducted air systems shall be sufficiently air tight to ensure that the measured results are not significantly influenced by exchange of air with the surroundings. 4.2.1.2 Test room for the air side The size of the test room shall be selected such that any resistance to air flow at the air inlet and air outlet orifices of the test object is avoided. The air flow through t