1、BS EN 1886:2007ICS 91.140.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDVentilation forbuildings Airhandling units MechanicalperformanceIncorporating January 2009Corrigendum This British Standardwas published underthe authority of theStandards Policy andStra
2、tegy Committee on 30September 2008 BSI 2008ISBN 978 0 580 Amendments/corrigenda issued since publicationDate CommentsBS EN 1886:2007National forewordThis British Standard is the UK implementation of EN 1886:2007. Itsupersedes BS EN 1886:1998 which is withdrawn.The UK participation in its preparation
3、 was entrusted to TechnicalCommittee RHE/2, Ventilation for buildings, heating and hot waterservices.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are resp
4、onsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.31 January 2009 Correction to poor quality figures65986 7BS EN 1886:2007EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1886December 2007ICS 91.140.30 Supersedes EN 1886:1998 English
5、 VersionVentilation for buildings - Air handling units - MechanicalperformanceVentilation des btiments - Caissons de traitement dair -Performances mcaniquesLftung von Gebuden - Zentrale raumlufttechnischeGerte - Mechanische Eigenschaften und MessverfahrenThis European Standard was approved by CEN on
6、 26 July 2006.CEN 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 o
7、btained on application to the CEN Management Centre 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 CEN Manag
8、ement Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
9、, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and b
10、y any means reservedworldwide for CEN national Members.Ref. No. EN 1886:2007: EBS EN 1886:2007EN 1886:2007 (E) 2 Contents Page Foreword. 4 Introduction. 6 1 Scope 7 2 Normative references . 7 3 Terms and definitions. 8 4 Usage of real units and/or model boxes for the verification of mechanical perfo
11、rmances 8 5 Mechanical strength of casing 9 5.1 Requirements and classification. 9 5.2 Testing 12 6 Casing air leakage. 13 6.1 Requirements and classification. 13 6.1.1 Units operating under negative pressure only 13 6.1.2 Units operating under both negative and positive pressure 14 6.2 Testing 14 6
12、.2.1 Test apparatus. 14 6.2.2 Preparation for test 15 6.3 Test procedure 16 6.4 Determination of allowable leakage rates 16 7 Filter bypass leakage 16 7.1 Requirements 16 7.1.1 General. 16 7.1.2 Acceptable filter bypass leakage rates. 16 7.1.3 Two or more filter sections in the same unit . 17 7.2 Te
13、sting 17 7.2.1 General. 17 7.2.2 Filters downstream of the fan (positive pressure) 19 7.2.3 Filters upstream of the fan (negative pressure) 21 8 Thermal performance of casing 23 8.1 General. 23 8.2 Requirements and classification. 23 8.2.1 Thermal transmittance 23 8.2.2 Thermal bridging. 24 8.3 Test
14、ing 25 8.3.1 General. 25 8.3.2 Test facility 25 8.3.3 Testing procedure. 27 8.3.4 Evaluation of the test results. 28 9 Acoustic insulation of casing 28 9.1 General. 28 9.2 Test requirements . 28 9.3 Test method. 28 9.4 Test procedure 29 9.5 Evaluation of the sound insertion loss Dp29 10 Fire protect
15、ion . 30 10.1 General. 30 BS EN 1886:2007EN 1886:2007 (E) 3 10.2 Material. 30 10.3 Sealings for air handling units 30 10.4 Locally limited and small construction parts of air handling units . 31 10.5 Air heaters . 31 10.6 Filters, contact humidifiers and droplet eliminators of AHUs. 31 10.7 Heat rec
16、overy 31 11 Mechanical safety . 31 Annex A (informative) Arrangement and requirements for circulating fans . 33 Bibliography . 35 BS EN 1886:2007EN 1886:2007 (E) 4 Foreword This document (EN 1886:2007) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, the secretariat o
17、f which is held by BSI. 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 June 2008, and conflicting national standards shall be withdrawn at the latest by June 2008. This document supersedes EN 188
18、6:1998. The standard is a part of a series of standards for air handling units used for ventilation and air conditioning of buildings for human occupancy. It considers the mechanical performance of an air handling unit as a whole and will be supported by a standard for sections and components. The p
19、osition of this standard in the whole field of standards for mechanical building services is illustrated in figure 1. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cy
20、prus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 1886:2007EN 1886:2007 (E) 5 Figur
21、e 1 Position of this standard in the field of mechanical building services BS EN 1886:2007EN 1886:2007 (E) 6 Introduction This standard specifies the mechanical performance of an air handling unit as a whole to be utilised by all involved in ventilation and air conditioning manufacturing, design, in
22、stallation and maintenance. The functions and characteristics of the individual sections of the unit will be considered in another series of standards covering air handling units. Because of different requirements due to climatic conditions and building traditions in different parts of Europe, and t
23、o the specific features of individual applications, most of the requirements are given in the form of classes, which may be specified to be used in certain regions, or separately for individual applications. BS EN 1886:2007EN 1886:2007 (E) 7 1 Scope This standard specifies test methods, test require
24、ments and classifications for air handling units, which are supplying and/or extracting air via a ductwork ventilating/conditioning a part or the whole of the building. This standard is not applicable to the following: a) air conditioning units serving a limited area in a building, such as fan coil
25、units; b) units for residential buildings; c) units producing ventilation air mainly for a manufacturing process. Except for the thermal and acoustic performance of the casing, the test methods and requirements are applicable to both complete units and any separate sections. The filter bypass test i
26、s not applicable to the testing of high efficiency particulate air filters (HEPA). NOTE HEPA filters are recommended to be installed downstream of the air handling unit. Such installations should be leak tested in accordance with the appropriate filter standards. The test method for the thermal perf
27、ormance of the casing is applicable to the comparison of different constructions, but not to the calculation of thermal losses through casing or the risk of condensation. Similarly, the test method for the acoustic performance of the casing is applicable to the comparison of different constructions,
28、 but not to the provision of accurate acoustic data for specific units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
29、 document (including any amendments) applies. EN 779, Particulate air filters for general ventilation Determination of the filtration performance EN 1507, Ventilation for buildings Sheet metal air ducts with rectangular section Requirements for strength and leakage EN 12237, Ventilation for building
30、s Ductwork Strength and leakage of circular sheet metal ducts EN 12792:2003, Ventilation for buildings Symbols, terminology and graphical symbols EN 13053:2001, Ventilation for buildings - Air handling units Ratings and performance for units, components and sections EN 13501-1, Fire classification o
31、f construction products and building elements Part 1: Classification using test data from reaction to fire tests EN 61310-1, Safety of machinery Indication, marking and actuation Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:1995) EN ISO 3743 (all parts), Acoustics Deter
32、mination of sound power levels of noise sources Engineering methods for small, movable sources in reverberant fields EN ISO 3744, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994
33、) BS EN 1886:2007EN 1886:2007 (E) 8 EN ISO 11546-2, Acoustics Determination of sound insulation performances of enclosures Part 2: Measurements in situ (for acceptance and verification purposes) (ISO 11546-2:1995) EN ISO 12100-2, Safety of machinery Basic concepts, general principles for design Part
34、 2: Technical principles (ISO 12100-2:2003) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 12792:2003 and EN 13053:2001 and the following apply. 3.1 air handling unit real unit factory made encased unit serving as a prime mover of a ventilat
35、ion or air conditioning installation where outdoor air, recirculated air or extract air is treated, consisting of a fan section where a filter section and heat exchanger may be connected. In addition the unit may consist of an inlet section with one or more louvres and dampers, a mixing section, hea
36、t recovery section, one or more heating and cooling coils, humidifiers, sound attenuators and additional equipment such as controls, measuring sections etc. 3.2 air handling unit model box special test unit (defined in 8.3.2) used to execute measurements for general classification, comparison or cat
37、egorisation of series or individual casings 4 Usage of real units and/or model boxes for the verification of mechanical performances For clear and non-ambiguous differentiation, it shall always be indicated whether the measurement has been made on the real unit or on the model box by using the lette
38、r “M“ for the model box and “R“ for the real unit in documentation. Test criteria of model boxes and real units are presented in Table 1. BS EN 1886:2007EN 1886:2007 (E) 9 Table 1 Test criteria of model box and real unit Kind of casing Test criteria Model box (M) Real unit (R) Mechanical strength Ge
39、neral classification of casing construction Particular classification of casing construction and individual evaluationAir leakage General classification of casing construction Particular classification of casing construction and individual evaluationFilter bypass leakage General classification of ca
40、sing construction Particular classification of casing construction and individual evaluationThermal transmittance General classification of casing construction - Thermal bridging General classification of casing construction - Acoustic insulation General classification of casing construction - 5 Mec
41、hanical strength of casing 5.1 Requirements and classification Air handling unit casings shall be categorised into classes in accordance to Table 2. Table 2 Casing strength classification of air handling units Casing class Maximum relative deflection mm m-1D1 D2 D3 4 10 exceeding 10 NOTE The leakage
42、 test shall be done after the strength test. For clear and non-ambiguous differentiation it shall always be indicated whether the measurement was made on the real unit or on the model box by using letter “M“ for the model box and “R“ for the real unit in documentation. EXAMPLE D1 (M) Class D1 and Cl
43、ass D2 casings shall be designed and selected so that the maximum deflection of any span of the panels and/or frames does not exceed the limits in Table 2 (see Figure 2). BS EN 1886:2007EN 1886:2007 (E) 10 The casings of class D1, D2 and D3 have to withstand the maximum fan pressure (not shock press
44、ure) at the selected design fan speed. No permanent deformation (hysteresis maximum 2,0 mm per m frame/panel span) of the structural parts (structures and supports) or damage of the casing may occur. Table 3 Test pressures Kind of casing Test criteria Model box (M) Real unit (R) Deflection 1 000 Pa
45、Normal operating conditions at selected design fan speed Withstand maximum fan pressure 2 500 Pa Maximum fan pressure at selected design fan speed Parts of the real unit, which are running under positive pressure, shall be tested under positive pressure. Parts of the real unit, which are running und
46、er negative pressure, shall be tested under negative pressure. Deviating test pressures shall be specified between the manufacturer and purchaser. BS EN 1886:2007EN 1886:2007 (E) 11 Key A Panel deflection B Frame deflection Figure 2 Illustration of panel and frame spans of air handling units The abi
47、lity of the real unit to withstand the maximum designed fan pressure may be demonstrated by prior agreement between the manufacturer and purchaser, by blanking off the inlets to the unit and running the fan up to its design operating speed. Downstream sections of blow-through units shall be proved b
48、y blanking off the air handling units outlets. Any special requirements, for example the ability to survive shock loading caused by sudden closure of fire dampers, should be clearly specified. BS EN 1886:2007EN 1886:2007 (E) 12 Figure 3 Deflection of panels and frames of air handling units 5.2 Testi
49、ng Deflection shall be measured within an accuracy of 0,5 mm whilst the air handling unit is operating under test conditions. For example, referring to Figure 3, deflection XX“ is measured for span RS, deflection XX“ is measured for span PQ. Deflection XX“ is a function of panel stiffness. Deflection XX“ is a function of both frame and panel stiffness. Frame deflection is RR and SS. EXAMPLE PQ = 2m RS = RS = 1 m Measured deflection XX“ = 8 mm Measured deflection XX“ = 5 mm BS EN 1886:2007EN 1886
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