SIST EN 13141-7:2011
(Main)Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
This part of EN 13141 specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical power of a mechanical supply and exhaust ventilation unit used in a single dwelling.
It covers unit that contain at least, within one or more casing:
- supply and exhaust air fans;
- air filters
- air-to-air heat exchanger and/or Exhaust Air-to-Outdoor Air heat pump for exhaust air heat recovery;
- control system.
Such equipment can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
The different possible arrangements of heat recovery heat exchangers and/or heat pumps are described in Annex A.
This standard does not deal with non-ducted units.
This standard does not deal with collective units (centralised or semi-centralised systems)
This standard does not cover ventilation systems that may also provide and water space heating and hot water production
This standard does not cover units including combustion engine driven compression heat pumps and absorption heat pump.
Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80.
Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftng von Wohnungen - Teil 7: Leistungsprüfung von mecanischen Zuluft- und Ablufteinheiten (einschließlich Wärmerückgewinnung) für mecanische Lüftungsanlagen in Einfamilienhäusern
Dieser Teil von EN 13141 legt die Laborprüfverfahren und die Anforderungen an die Prüfung der aero¬dyna-mischen, thermischen und akustischen sowie der elektrischen Leistung von mechanischen Zuluft und Fort-luftgeräten zur Verwendung in Wohneinheiten fest.
Er deckt Geräte ab, die in einem oder mehreren Gehäuse(n) mindestens Folgendes umfassen:
- Zuluft und Fortluftventilatoren;
- Luftfilter;
- Luft-Luft-Wärmeübertrager und/oder Abluft/Außenluft-Wärmepumpen für Abluft Wärmerückgewinnung;
- Steuer und Regeleinrichtung.
Eine derartige Einrichtung kann in mehr als einer Baugruppe geliefert werden, wobei die einzelnen Bau¬grup¬pen dafür ausgelegt sind, zusammen verwendet zu werden.
Die verschiedenen möglichen Anordnungen der Wärmeübertrager und/oder Wärmepumpen für die Wärme-rückgewinnung sind in Anhang A beschrieben.
Diese Norm behandelt keine Geräte, die nicht an Luftleitungen angeschlossen sind oder Umschalt-Wärme-spei¬cher.
Diese Norm behandelt keine Geräte, die mehrere Wohneinheiten gemeinsam versorgen.
Die vorliegende Norm behandelt keine Lüftungsanlagen, die auch für die Warmwasser-Raumheizung und die Warmwasserbereitung eingesetzt werden können.
Diese Norm behandelt keine Geräte, die Kompressionswärmepumpen mit Antrieb durch Verbrennungs¬motor und Absorptionswärmepumpen umfassen.
Die Anforderungen an die elektrische Sicherheit sind in EN 60335 2 40 und EN 60335 2 80 angegeben.
Ventilation dans les bâtiments - Essais de performance des composants/produits pour la ventilation des logements - Partie 7: Essais de performance des bouches d'alimentation et d'évacuation (y compris la récupération de chaleur) pour les systèmes de ventilation mécaniques prévus pour des logements individuels
La présente partie de l'EN 13141 spécifie les méthodes d'essai en laboratoire et les prescriptions relatives aux essais de performance aéraulique, thermique et acoustique et des mesures de puissance électrique des dispositifs double flux utilisés pour la ventilation mécanique d’un logement individuel.
Elle couvre les dispositifs contenant, dans un ou plusieurs caissons, au moins :
- des ventilateurs de soufflage et d’extraction d’air ;
- des filtres à air ;
- un échangeur de chaleur air-air et/ou une pompe à chaleur air repris-air neuf pour la récupération de chaleur de l’air repris ;
- un système de régulation.
Un tel dispositif peut être fourni en plusieurs éléments, ceux-ci étant conçus pour être utilisés conjointement.
Les différentes configurations possibles des échangeurs récupérateurs de chaleur et/ou des pompes à chaleur sont décrites en Annexe A.
La présente norme ne traite pas des dispositifs sans conduit ou des échangeurs de chaleur alternatifs.
La présente norme ne traite pas des dispositifs qui alimentent plusieurs logements.
La présente norme ne couvre pas les systèmes de ventilation pouvant aussi produire du chauffage à eau chaude et l’eau chaude sanitaire.
La présente norme ne couvre pas les dispositifs comprenant des pompes à chaleur entraînées par un moteur à combustion et des pompes à chaleur à absorption.
Les prescriptions de sécurité électrique sont données dans l’EN 60335-2-40 et l’EN 60335-2-80.
Prezračevanje stavb - Preskušanje lastnosti stanovanjskih prezračevalnih komponent/proizvodov - 7. del: Preskušanje lastnosti mehanskih dovodnih in odvodnih enot (vključno z enotami za vračanje toplote) za mehanske prezračevalne sisteme za enodružinska stanovanja
Ta del EN 13141 opredeljuje laboratorijske preskusne metode in preskusne zahteve za preskušanje aerodinamičnih, toplotnih in akustičnih lastnosti ter električne moči mehanskih dovodnih in odvodnih prezračevalnih enot, ki se uporabljajo v enodružinskih stanovanjih.
Zajema enoto, ki vsebuje, z enim ali več ohišji, vsaj:
- ventilatorje za dovod in odvod zraka;
- zračne filtre;
- toplotni izmenjevalnik zrak-zrak in/ali toplotno črpalko izhodni zrak-zunanji zrak za vračanje toplote izhodnega zraka;
- nadzorni sistem.
Taka oprema je lahko na voljo v več kot enem sklopu, pri katerih so ločeni sklopi zasnovani za skupno uporabo.
Različne mogoče ureditve vračanja toplote toplotnih izmenjevalnikov in/ali toplotnih črpalk so opisane v dodatku A.
Ta standard ne obravnava enot brez vodov.
Ta standard se ne ukvarja s skupinskimi enotami (centralizirani ali polcentralizirani sistemi).
Ta standard ne zajema prezračevalnih sistemov, ki tudi lahko zagotavljajo ogrevanje prostora in proizvodnjo tople vode.
Ta standard ne zajema enot, ki vključujejo absorpcijske toplotne črpalke in kompresijske toplotne črpalke s pogonskim motorjem z notranjim zgorevanjem.
Zahteve glede električne varnosti so podane v EN 60335-2-40 in EN 60335-2-80.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HYDOQLKHLüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftng von Wohnungen - Teil 7: Leistungsprüfung von mecanischen Zuluft- und Ablufteinheiten (einschließlich Wärmerückgewinnung) für mecanische Lüftungsanlagen in EinfamilienhäusernVentilation dans les bâtiments - Essais de performance des composants/produits pour la ventilation des logements - Partie 7: Essais de performance des bouches d'alimentation et d'évacuation (y compris la récupération de chaleur) pour les systèmes de ventilation mécaniques prévus pour des logements individuelsVentilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 13141-7:2010SIST EN 13141-7:2011en,fr01-maj-2011SIST EN 13141-7:2011SLOVENSKI
STANDARDSIST EN 13141-7:20041DGRPHãþD
SIST EN 13141-7:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13141-7
November 2010 ICS 91.140.30 Supersedes EN 13141-7:2004English Version
Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
Ventilation des bâtiments - Essais de performance des composants/produits pour la ventilation des logements - Partie 7: Essais de performance des centrales double flux (y compris la récupération de chaleur) pour les systèmes de ventilation mécaniques prévus pour des logements individuels
Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftung von Wohnungen - Teil 7: Leistungsprüfung von mechanischen Zuluft- und Ablufteinheiten (einschließlich Wärmerückgewinnung) für mechanische Lüftungsanlagen in Wohneinheiten (Wohnung oder Einfamilienhaus) This European Standard was approved by CEN on 25 September 2010.
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 bibliographical references concerning such national standards may be obtained 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13141-7:2010: ESIST EN 13141-7:2011
EN 13141-7:2010 (E) 2 Contents page Foreword . 3Introduction . 51Scope . 52Normative references . 63Terms, definitions and classification . 63.1Terms and definitions . 73.2Categories of heat exchangers . 84Symbols and abbreviations . 95Requirements . 96Test methods . 106.1General . 106.2Performance testing of aerodynamic characteristics . 116.2.1Leakages . 116.2.2Air flow/pressure curve . 136.2.3Filter bypass . 146.3Performance testing of thermal characteristics . 146.3.1General . 146.3.2Temperature and humidity ratios . 156.3.3Heat pump performance . 186.3.4Combined heat pump and air-to-air heat exchanger performance . 186.4Performance testing of acoustic characteristics . 196.4.1Noise radiated through the casing of the unit . 196.4.2Sound power level in duct connections of the unit . 206.5Electric power input. 227Test results . 237.1Test report . 237.2Product specifications . 237.3Leakages . 237.4Air flow/pressure curve . 247.5Heat pump exhaust air/outdoor air performances . 247.6Temperature ratios . 247.7Acoustic characteristics . 257.8Electric power input. 25Annex A (informative)
Example of some possible arrangements of heat recovery heat exchanger and/or heat pumps for category I . 26Annex B (normative)
Pressure leakage test method . 28B.1External leakage. 28B.2Internal leakage test . 28Annex C (normative)
Tracer gas test method . 30C.1General method for rating purposes . 30C.2Augmented method for measuring instantaneous recirculation of ducted units under different operating conditions
(optional) . 31C.3Testing orders for tracer gas tests . 32Bibliography . 36
SIST EN 13141-7:2011
EN 13141-7:2010 (E) 3 Foreword This document (EN 13141-7:2010) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, the secretariat of 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 May 2011, and conflicting national standards shall be withdrawn at the latest by May 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13141-7:2004.
Compared to the 2004 version, changes have been made to the following (sub)clauses, tables and annexes: modification of the test temperatures to be similar to those of heat pump; possibility of measuring supply and exhaust ventilation and heat pump; suppression of reference to EN 308 for heat exchangers particular test conditions, this standard define its own conditions; introduction of tracer gas method for leakages; dependence of leakages under/over pressure configurations on fan position in airflow; obligation of reporting the two temperature ratios (on exhaust and supply air); possibility of doing an optional test by measuring on the outdoor side of the building while the measure is made on the inside side of the building in the mandatory test (exhaust and supply air flow rate); possibility of giving humidity ratios, like for PAC, this allowed to test enthalpy heat exchangers; review of value for balanced mass flows at 3 %, over 3% declaration of unbalanced unit and report of the disbalance value; setting of the declared maximum air volume flow at 50 Pa by default in lack of other declaration; addition of the declared minimum air volume flow at Ptud/2 and minimum setting; creation of a reference point at Ptud/2 and 70 % of declared maximum air volume flow; correction of the temperature ratios considering flow rate ratios. This standard is a part of a series of standards on residential ventilation. It has a parallel standard referring to the performance characteristics of the components/products for residential ventilation. The position of this standard in the field of standards for the mechanical building services is shown 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, Bulgaria, Croatia, 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 the United Kingdom. SIST EN 13141-7:2011
EN 13141-7:2010 (E) 4
Mechanical Building Services
Control systems
Ventilation and air conditioning systems
Heating systems
Ductwork
Air terminal devices
Air handling units
Mechanical and natural residential ventilation
Design criteria for the indoor environment
System performance
Installation
Components/products for residential ventilation Required and optional performance characteristics
Performance testing of components/products for residential ventilation
Simplified calculation methods for residential ventilation systems
Design and dimensioning for residential ventilation systems
Performance testing and installation checks for residential ventilation systems
Part 1: Externally and internally mounted air transfer devices
Part 2: Exhaust and supply air terminal devices
Part 3: Range hoods for residential use
Part 4: Fans used in residential ventilation systems
Part 5: Cowls and roof outlet terminal devices
Part 6: Exhaust ventilation system packages used in a single dwelling
Part 7: Mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single
family dwellings
Part 8: Performance testing of un-ducted mechanical supply and exhaust ventilation units (including heat recovery) for mechanical
ventilation systems intended for a single room
Part 9: Externally mounted humidity controlled air transfer device
Part 10: Humidity controlled extract air terminal device
Figure 1 — Position of EN 13141-7 in the field of the mechanical building services
SIST EN 13141-7:2011
EN 13141-7:2010 (E) 5 Introduction This European Standard specifies methods for the performance testing of components used in residential ventilation systems to establish the performance characteristics as identified in EN 13142. This European Standard does not contain any information on ductwork and fittings, which are covered by other European Standards. The standard can be used for the following applications: laboratory testing; attestation purposes. 1 Scope This part of EN 13141 specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical performance characteristic of a mechanical supply and exhaust ventilation units used in a single dwelling. It covers unit that contain at least, within one or more casing: supply and exhaust air fans; air filters; air-to-air heat exchanger and/or Extract Air-to-Outdoor Air heat pump for extract air heat recovery; control system. Such unit can be provided in more than one assembly, the separate assemblies of which are designed to be used together. The different possible arrangements of heat recovery heat exchangers and/or heat pumps are described in Annex A. This standard does not deal with non-ducted units or reciprocating heat exchangers.
This standard does not deal with units that supply several dwellings. This standard does not cover ventilation systems that may also provide water space heating and hot water. This standard does not cover units including combustion engine driven compression heat pumps and absorption heat pumps. Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80. SIST EN 13141-7:2011
EN 13141-7:2010 (E) 6 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 306, Heat exchangers — Methods of measuring the parameters necessary for establishing the performance EN 12792:2003, Ventilation for buildings — Symbols, terminology and graphical symbols EN 13141-4, Ventilation for buildings — Performance testing of components/products for residential ventilation — Part 4: Fans used in residential ventilation systems EN 14511-2, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling — Part 2: Test conditions EN 14511-3, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling — Part 3: Test methods EN 14511-4, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling — Part 4: Requirements EN ISO 3741, Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for reverberation rooms (ISO 3741:1999, including Cor 1:2001) EN ISO 3743-1, Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test rooms (ISO 3743-1:1994) EN ISO 3743-2, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering methods for small, movable sources in reverberant fields — Part 2: Methods for special reverberation test rooms (ISO 3743-2:1994) 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) EN ISO 3745, Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003) EN ISO 5135, Acoustics — Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room (ISO 5135:1997) EN ISO 5136, Acoustics — Determination of sound power radiated into a duct by fans and other air-moving devices — In-duct method (ISO 5136:2003) EN ISO 9614-1, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points (ISO 9614-1:1993) EN ISO 9614-2, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 2: Measurement by scanning (ISO 9614-2:1996) 3 Terms, definitions and classification For the purposes of this document, the terms and definitions given in EN 12792:2003 and the following apply. SIST EN 13141-7:2011
EN 13141-7:2010 (E) 7 3.1 Terms and definitions 3.1.1 external leakage leakage to or from the air flowing inside the casing of the unit to or from the surrounding air 3.1.2 internal leakage leakage inside the unit between the exhaust and the supply air flows 3.1.3 filter bypass leakage air flow around filter cells 3.1.4 declared maximum air volume flow air volume flow corresponding to the declared total pressure of the unit at the maximum setting for standard air conditions (20 °C, 101325 Pa)
3.1.5 declared minimum air volume flow air volume flow corresponding to Ptud/2 Pa at the minimum setting for standard air conditions (20 °C, 101325 Pa)
3.1.6 Ptud/2 declared total pressure difference between the outlet and the inlet of the unit 3.1.7 temperature ratio temperature difference between inlet and outlet of one of the air flows divided by the temperature difference between the inlets of both air flows 3.1.8 electric power input average electrical power input to the equipment within a defined interval of time, in watts, obtained from: the power input of the fans; the power input for operation of any compressor(s) and any power input for defrosting, excluding additional electrical heating devices not used for defrosting; the power input of all control and safety devices of the equipment 3.1.9 test voltage voltage to be used for supplying the components during the testing 3.1.10 humidity ratio difference of water content between inlet and outlet of one of the air flows divided by the difference of water content between the inlets of both air flows 3.1.11 recirculation fraction (R) mass fraction of the discharged air to a zone (see Figure 2: from key 4 (extract) to key 5 (supply)) that is actually recirculated air from the same zone, due to internal leakage, external casing leakage and local short-circuiting
SIST EN 13141-7:2011
EN 13141-7:2010 (E) 8 3.2 Categories of heat exchangers
Category I: Recuperative heat exchangers (e.g. air-to-air plate or tube heat exchanger) Recuperative heat exchangers are designed to transfer thermal energy (sensible or total) from one air stream to another without moving parts. Heat transfer surfaces are in form of plates or tubes. This heat exchanger may have parallel flow, cross flow or counterflow construction or a combination of these. Plate and tube heat exchangers with vapour diffusion (for instance cellulose) are also in this category. Category II: Regenerative heat exchangers (e.g. rotary or reciprocating heat exchanger) A rotary heat exchanger is a device incorporating a rotating “thermal wheel” for the purpose of transferring energy (sensible or total) from one air stream to the other. It incorporates material allowing latent heat transfer, a drive mechanism, a casing or frame, and includes any seals which are provided to retard bypassing and leakage or air from one air stream to the other. Regenerative heat exchangers have varying degrees of moisture recovery, depending on the material used (e.g. "condensation rotor/non hygroscopic rotor", "hygroscopic rotor" and 'sorption rotor" heat exchangers). SIST EN 13141-7:2011
EN 13141-7:2010 (E) 9 4 Symbols and abbreviations For the purposes of this document, the symbols and abbreviations given in EN 12792:2003 and the following apply. c Concentration of tracer gas ppm D Diameter of the measurement duct (see Figure 2) in m Dh1, Dh2 Hydraulic diameters of the connecting duct (see Figure 3)
in m LW Sound power level
in dB LWA A-weighted sound power level
in dB ps Static pressure In Pa PE Effective power input
in W ptU Total pressure difference between the outlet and the inlet of the unit
in Pa ptUd Declared total pressure difference between the outlet and the inlet of the unit
in Pa qm Mass air flow rate in kg.s-1 or g.s-1 qv Volume flow rate in m 3 .s-1 or l.s-1 qvn Nominal air volume flow in m 3 .s-1 or l.s-1 qvd Declared maximum air volume flow rate in m 3 .s-1 or l.s-1 qve External leakage air volume flow rate in m 3 .s-1 or l.s-1 qvi Internal leakage air volume flow rate in m 3 .s-1 or l.s-1 R Recirculation fraction, measured with tracer gas test.
- V Air velocity in the measurement duct (see Figure 3)
in m.s-1 θ Air temperature in °C x water content
in kg water / kg dry air 21 22 11 12 Outdoor air (see Figure 2) Supply air (see Figure 2) Extract air (see Figure 2) Exhaust air (see Figure 2)
ηθ, ex Temperature ratio of the unit on exhaust air side
ηθ, su Temperature ratio of the unit on supply air side
ηx, ex Humidity ratio of the unit on exhaust air side
ηx, su Humidity ratio of the unit on supply air side
5 Requirements To set the declared maximum air volume flow, the declared total pressure shall correspond to 100 Pa, or to a lower total pressure if the intended use declared by the manufacturer is less than 100 Pa. The declared maximum air volume flow shall be equal to the smaller if the supply and extract air volume flows are different.
In addition, to assess correctly the thermal performance, aerodynamic characteristics, including all leakages, shall be tested before or together with any thermal characteristics testing (see 6.3). SIST EN 13141-7:2011
EN 13141-7:2010 (E) 10 Aerodynamic characteristics (see 6.2) shall include three characteristics listed below: external leakage or total recirculated fraction in supply air; internal leakage or recirculated fraction from extract to supply air or total recirculated fraction in supply air; air flow/pressure curve; Other characteristics such as filter bypass leakage are optional. The tests for air flow/pressure curve and thermal performances shall not be made because of measurement uncertainty when leakages according to 6.2.1 are too high. The unit shall have the leakage class specified in Table 1.
Table 1 — Classification requirements for thermal performance
Supply fan upstream and exhaust fan downstream of the heat exchanger or
Exhaust fan upstream and supply fan downstream
of the heat exchangera Other fan positions required class to allow measurements Class A1, A2, B1, B2, C1, C2
All classified units a This configuration is not recommended for good Indoor air quality.
The manufacturer shall declare: maximum air volume flow; maximum disbalance air flow;
declared total pressure difference of the unit; minimum air volume flow; minimum outside operation temperature; filter classes supply and exhaust air; balancing of air volume flows; presence of by-pass and its control; frost protection function and control (for cold climate test). 6 Test methods 6.1 General Tests shall be conducted with a unit containing all components as supplied for intended use, and installed according to the manufacturer's instructions. For units which are intended to be used in dwellings of different sizes (e.g. 4, 5 or 6 rooms), the tests shall be made in the “maximum” configuration (i.e. 6 rooms). SIST EN 13141-7:2011
EN 13141-7:2010 (E) 11 Where a single value is assigned by the manufacturer as rated voltage, this shall be the test voltage. Where a voltage range is assigned to the product by the manufacturer that includes 230 V, the test shall be conducted at 230 V. This voltage shall be maintained throughout the testing to ± 1 %. 6.2 Performance testing of aerodynamic characteristics 6.2.1 Leakages 6.2.1.1 General There are two methods for rating leakages, pressure testing and tracer gas testing (see Annexes B and C): The pressure method applies to classify leakages of category I heat exchanger unit; The tracer gas method applies to classify leakages of category II heat exchanger unit. There are four classes of leakage depending on the ratios between both leakage air flows and maximum declared air volume. 6.2.1.2 Pressurisation test methods (internal and external leakage) and classification Pressure method applies to classify leakages of category I heat exchanger unit by using Table 2. Table 2 — Leakage classification – pressure method Class Pressurization test Internal leakage
(at 100 Pa)
External leakage (at 250 Pa) A1 ≤ 2 % and ≤ 2 % A2 ≤ 5 % and ≤ 5 % A3 ≤ 10 % and ≤ 10 % not classified > 10 % or > 10 %
The external and internal leakage shall be measured according to Annex B.
The external leakage air volume flow qve at over and/or under pressure of 250 Pa, according to Table 3, shall be reported as such and also compared to the declared maximum air volume flow of the unit as a percentage.
At least three different measurement points evenly distributed shall be made between 100 Pa and 300 Pa, and reported by means of a curve. Both over pressure and under pressure shall be reported. If one of these tests is not required (see Table 5), the report shall then mention “not required”. Table 3 — Pressure conditions during external leakage test Supply fan position Upstream of the heat exchanger upstream of the heat exchanger downstream of the heat exchanger downstream of the heat exchanger Exhaust fan position upstream of the heat exchanger downstream of the heat exchanger upstream of the heat exchanger downstream of the heat exchanger Tests conditions for external leakages over-pressure over and under-pressure over and under-pressure under-pressure
SIST EN 13141-7:2011
EN 13141-7:2010 (E) 12 The internal leakage air volume flow qvi at a pressure difference of 100 Pa shall be reported as such and also compared to the declared maximum air volume flow of the unit as a percentage. Different measurement points shall be made between 50 Pa and 200 Pa, and reported by means of a curve. During the pressurisation tests for external and internal leakages, the fans of the unit under test shall be switched off. 6.2.1.3 Tracer gas method Tracer gas method applies to classify leakages of category II heat exchanger unit. There are two options for this (see Annex C), either a chamber method determining the total recirculated fraction (internal and external leakages) or an in-duct method determining by pressurisation the external leakage and by tracer gas the internal part only in the recirculation fraction. In case of chamber method, classes of Table 4 shall be used. In case of in-duct method, classes of Table 5 shall be used. The chamber method can be used in all cases, whilst the in-duct method is only applicable if the unit is classified C1, C2 or C3 according to Table 5, which means that the casing leakage is negligible. Table 4 — Leakage classification –chamber tracer gas method Class Total Recirculated fraction in supply air (Rs,tot) B1 ≤ 1 % B2 ≤ 2 % B3 ≤ 6 % not classified > 6 %
Table 5 — Leakage classification – in
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