SIST EN 14175-6:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fume cupboards - Part 6: Variable air volume fume cupboardsDigestoriji - 6. del: Digestoriji s spremenljivim volumnom zrakaSorbonnes - Partie 6 : Sorbonnes a débit d'air variableAbzüge - Teil 6: Abzüge mit variablem LuftstromTa slovenski standard je istoveten z:EN 14175-6:2006SIST EN 14175-6:2006en71.040.10Kemijski laboratoriji. Laboratorijska opremaChemical laboratories. Laboratory equipmentICS:SLOVENSKI
STANDARDSIST EN 14175-6:200601-oktober-2006







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14175-6May 2006ICS 71.040.10 English VersionFume cupboards - Part 6: Variable air volume fume cupboardsSorbonnes - Partie 6 : Sorbonnes à débit d'air variableAbzüge - Teil 6: Abzüge mit variablem LuftstromThis European Standard was approved by CEN on 3 April 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 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the 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, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14175-6:2006: E



EN 14175-6:2006 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Requirements.5 4.1 General.5 4.2 System status port.6 4.3 Air flow indicator.6 5 Type test methods.6 5.1 General.6 5.2 Test conditions.6 5.2.1 VAV fume cupboards (see 5.4).6 5.2.2 VAV systems (see 5.3).6 5.3 Test of VAV systems.6 5.3.1 General.6 5.3.2 Tests for air flow rate characteristics.7 5.3.3 Tests for dynamic control behaviour.9 5.3.4 Test of set points.11 5.4 Test of VAV fume cupboards.12 5.4.1 Test installation.12 5.4.2 Test of the integrated VAV system.12 5.4.3 Test of the VAV fume cupboard.12 6 On-site test methods.12 6.1 General.12 6.2 Extract volume flow rate at set points.12 6.3 Test of set points.12 6.4 Test of response time.13 6.5 Containment.13 6.6 Air exchange at minimum volume flow rate.13 7 Product manual.13 8 Marking and labelling.13 9 Test reports.13 9.1 Type test report for VAV systems.13 9.2 Type test report for VAV fume cupboards.14 9.3 On-site test report for VAV fume cupboards.14 Bibliography.16



EN 14175-6:2006 (E) 3 Foreword This document (EN 14175-6:2006) has been prepared by Technical Committee CEN/TC 332 “Laboratory Equipment”, the secretariat of which is held 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 November 2006, and conflicting national standards shall be withdrawn at the latest by November 2006. EN 14175 consists of the following parts, under the general title Fume cupboards:  Part 1: Vocabulary  Part 2: Safety and performance requirements  Part 3: Type test methods  Part 4: On-site test methods  Part 6: Variable air volume fume cupboards
Part 5 (Recommendations for installation and maintenance) is in preparation and will be published as a Technical Specification CEN/TS 14175-5. 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 14175-6:2006 (E) 4 Introduction The purpose of a variable air volume (VAV) system is to control the extract volume flow rate of a fume cupboard at various sash openings. The objective of this document is to specify test methods relevant to the assessment of the performance of variable air volume (VAV) fume cupboards (see definition in EN 14175-1, 3.5) either as a single VAV system or as a combination of fume cupboard plus VAV system. The intention of this document is to enable a purchaser to choose his fume cupboard according to his demands and needs for containment, air exchange efficiency etc, as described in EN 14175-3. Afterwards, the purchaser can proceed with his selection of an appropriate VAV system.



EN 14175-6:2006 (E) 5 1 Scope This document specifies requirements and type test methods for VAV systems. It also specifies additional requirements to those in EN 14175-2 and additional test methods to those in EN 14175-3 and EN 14175-4 for fume cupboards with VAV systems (VAV fume cupboards). For terms and definitions, EN 14175-1 applies. For safety and performance requirements of fume cupboards, EN 14175-2 applies. For type testing of fume cupboards with preset air volume flow, EN 14175-3 applies. For on-site test methods of fume cupboards already installed in a laboratory, EN 14175-4 applies. 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 document (including any amendments) applies. EN 12589:2001, Ventilation for buildings - Air terminal units - Aerodynamic testing and rating of constant and variable rate terminal units. EN 14175-1:2003, Fume cupboards - Part 1: Vocabulary. EN 14175-2:2003, Fume cupboards - Part 2: Safety and performance requirements. EN 14175-3:2003, Fume cupboards - Part 3: Type test methods. EN 14175-4:2004, Fume cupboards - Part 4: On-site test methods. EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2003). 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14175-1:2003 and EN 14175-3:2003 and the following apply. 3.1 VAV system
modular components enabling the control of the extract volume flow rate of a fume cupboard at various sash openings 3.2 response time time from a change of the set value, e.g. volume flow rate or face velocity, until the actual new set value reaches and maintains a specified percentage 4 Requirements 4.1 General Variable air volume fume cupboards shall meet the requirements specified in EN 14175-2 for general purpose fume cupboards and the following requirements in this document.



EN 14175-6:2006 (E) 6 4.2 System status port Means shall be provided to indicate the status of the VAV system, such as the position of damping/regulating devices, measured and controlled values. NOTE For electrically operated systems, this can be done for instance by providing an easily accessible electrical socket for handheld readouts. 4.3 Air flow indicator VAV fume cupboards shall be equipped with an air flow indicator with audible and visual alarms in accordance with EN 14175-2:2003, 8.2. The visual alarm may be, for example, a red flashing light in the visual field of the fume cupboard operator. Means should be provided to relay the alarm. NOTE General requirements for visual danger signals are given in EN 842. 5 Type test methods 5.1 General VAV systems and VAV fume cupboards can be tested either separately in accordance with 5.3 or in combination in accordance with 5.4. As an alternative to the tests specified in 5.3, it is possible to test the VAV system together with a fume cupboard (1) instead of the test box. Also if the tests according to 5.3 have been done, it is possible for a purchaser, user or manufacturer to test individual fume cupboards (2) according to 5.4. In both cases (1) and (2), the test results are only valid for the particular combination of VAV system and fume cupboard used. The type test in accordance with 5.3 or 5.4 shall be performed in addition to those type test methods specified in EN 14175-3. It is necessary to test the fume cupboard at the minimum air extract flow rate at the closed sash position and to find out the effect on containment of the fume cupboard and the effect of changing the extract volume flow rate during changing the sash position by the VAV system. 5.2 Test conditions 5.2.1 VAV fume cupboards (see 5.4) The test room shall be in accordance with EN 14175-3:2003, Clause 4, with the additional requirement that the pressure difference between the test room and adjacent rooms varies no more than ± 5 Pa.
The air flow system of the test room should be sized so that the required changes in extract volume flow rate do not cause too large changes of the static pressure in the extract duct. 5.2.2 VAV systems (see 5.3) In the surroundings of 1 m around the test box (see 5.3.2.2), the air conditions as specified in EN 14175-3:2003, 4.2 shall prevail. 5.3 Test of VAV systems 5.3.1 General Type testing of VAV systems not fitted to an individual fume cupboard shall be performed in association with the test box shown in Figure 1. NOTE Basis for this type test is EN 12589.



EN 14175-6:2006 (E) 7 5.3.2 Tests for air flow rate characteristics 5.3.2.1 Principle This test is to determine the changes in volume flow rate resulting from variations in the pressure difference between the surroundings and the downstream duct of the VAV, and additionally, to d
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