EN 12599:2012
(Main)Ventilation for buildings - Test procedures and measurement methods to hand over air conditioning and ventilation systems
Ventilation for buildings - Test procedures and measurement methods to hand over air conditioning and ventilation systems
This European Standard specifies checks, test methods and measuring instruments in order to verify the fitness for purpose of the installed systems primarily for handing over which will be partially performed before, during and after handing over.
This European Standard enables the choice between simple test methods, when sufficient, and extensive measurements, when necessary.
This European Standard applies to mechanically operated ventilation and air conditioning systems as specified in EN 12792 and comprising any of the following:
- air terminal devices and units,
- air handling units,
- air distribution systems (supply, extract, exhaust),
- fire protection devices,
- automatic control devices.
When the system is set, adjusted and balanced measurement methods described in this European Standard apply.
This European Standard does not apply to:
- heat generating systems and their control,
- refrigerating systems and their control,
- distribution of heating and cooling medium to the air handling units,
- compressed air supplying systems,
- water conditioning systems,
- central steam generating systems for air humidifying,
- electric supply systems.
This European Standard applies to ventilation and air conditioning systems designed for the maintenance of comfort conditions in buildings. It is not applicable in the case of systems for the control of industrial or other special process environments. In the latter case, however, it may be referred to if the system technology is similar to that of the above mentioned ventilation and air conditioning systems.
This European Standard does not include any requirements concerning the installation contract. However, in order to facilitate the application of this standard, the installation contract should refer to the provisions which are listed in Annex F.
The measuring methods in this European Standard can be used in the frame of the energy inspection of air-conditioning systems according to EU Directive 2010/31/EU "Energy performance of buildings Directive" (see EN 15239, EN 15240).
This European Standard may be used for residential and dwelling ventilation systems.
Lüftung von Gebäuden - Prüf- und Messverfahren für die Übergabe raumlufttechnischer Anlagen
Diese Europäische Norm legt Prüfungen, Prüfverfahren und Messgeräte zur Feststellung der Gebrauchstauglichkeit von installierten Anlagen bei der Übergabe fest, die teilweise vor, während und nach der Übergabe durchgeführt werden.
Diese Europäische Norm ermöglicht die Wahl zwischen einfachen Prüfverfahren, wenn ausreichend, und aufwendigen Messungen, wenn erforderlich.
Diese Europäische Norm gilt für mechanisch betriebene raumlufttechnische Anlagen (RLT Anlagen) nach EN 12792, die eine oder mehrere der folgenden Einrichtungen enthalten:
Luftdurchlässe und Endgeräte;
Luftbehandlungseinheiten;
Luftverteilungssysteme (Zuluft, Abluft, Fortluft);
Brandschutzeinrichtungen;
automatische Regel und Kontrolleinrichtungen.
Wenn die Anlage fertiggestellt und abgeglichen ist, gelten die in dieser Europäischen Norm beschriebenen Messverfahren.
Diese Europäische Norm gilt nicht für:
wärmeerzeugende Anlagen und deren Regelung;
Kälteanlagen und deren Regelung;
Wärme und Kälteverteilung bis zu den Luftbehandlungseinheiten;
Druckluftversorgungsanlagen;
Wasseraufbereitungsanlagen;
zentrale dampferzeugende Anlagen zur Luftbefeuchtung und
Elektrizitätsversorgungsanlagen.
Diese Europäische Norm gilt für RLT Anlagen, deren Bestimmung die Erhaltung eines Behaglich¬keitszustands in Gebäuden ist. Sie gilt nicht für Anlagen zum Betreiben von Räumen für industrielle oder andere besondere Prozesse. Im letztgenannten Fall kann jedoch auf diese Norm Bezug genommen werden, wenn die Anlagentechnik denen der vorgenannten RLT-Anlagen ähnlich ist.
Diese Europäische Norm enthält keine Anforderungen für den Installationsvertrag. Um die Anwendung dieser Norm zu vereinfachen, sollten allerdings die in Anhang F aufgeführten Hinweise im Vertrag berücksichtigt werden.
Die Messverfahren dieser Norm können im Rahmen der energetischen Inspektion von Klimaanlagen nach der EU Richtlinie 2010/31/EG „Gesamtenergieeffizienz von Gebäuden“ (siehe EN 15239, EN 15240) angewendet werden.
Diese Europäische Norm kann für Lüftungsanlagen von Wohnungen und Wohngebäuden angewendet werden.
Ventilation des bâtiments - Procédures d'essai et méthodes de mesure pour la réception des installations de conditionnement d'air et de ventilation
La présente Norme européenne spécifie des contrôles, des méthodes d'essai et des instruments de mesure en vue de vérifier l'aptitude à l'emploi des systèmes installés lors de la réception et qui seront partiellement effectués au stade avant, pendant et après la réception.
La présente Norme européenne permet de choisir entre des méthodes d'essai simples, lorsqu'elles suffisent, et des mesures plus importantes, si elles sont nécessaires.
La présente Norme européenne s'applique aux systèmes de ventilation et de conditionnement d’air mécaniques comme précisé dans l’EN 12792 et comprenant l'un quelconque des éléments suivants :
bouches d’air et unités de terminal ;
centrales de traitement d'air ;
systèmes de distribution d’air (fourni, repris, rejeté) ;
dispositifs de protection contre l'incendie ;
dispositifs de commande automatique.
Lorsque le système est réglé et équilibré, les méthodes de mesure décrites dans la présente Norme européenne s’appliquent.
La présente norme européenne ne s'applique pas :
aux systèmes de chauffage et à leur commande ;
aux systèmes frigorifiques et à leur commande ;
à la distribution des agents calorifiques et frigorifiques aux centrales de traitement d’air ;
aux systèmes d'alimentation en air comprimé ;
aux systèmes de traitement des eaux ;
aux systèmes centraux de génération de vapeur pour l'humidification de l'air ;
aux systèmes d'alimentation électrique.
La présente Norme européenne s'applique aux systèmes de ventilation et de conditionnement d’air conçus pour maintenir des conditions de confort dans les bâtiments. Elle ne s'applique pas aux systèmes de commande pour des environnements industriels ou autres environnements spécifiques. Dans ce dernier cas, il peut toutefois y être fait référence si la technologie du système est analogue à celle des systèmes de ventilation et de conditionnement d’air mentionnés ci-dessus.
La présente Norme européenne ne comporte aucune prescription relative au contrat d'installation. Afin de faciliter l'application de la présente norme, il convient toutefois que le contrat d'installation se réfère aux dispositions énumérées à l’Annexe F.
Les méthodes de mesures de la présente Norme européenne peuvent être utilisées dans le cadre de la vérification énergétique des systèmes de conditionnement d’air conforment à la Directive CE CE/31/2010 « Directive performance énergétique des bâtiments » (voir EN 15239, EN 15240).
La présente Norme européenne peut être utilisée pour les systèmes de ventilation résidentielle et d’habitation.
Prezračevanje stavb - Preskusni postopki in merilne metode za predajo klimatskih in prezračevalnih sistemov
Ta evropski standard določa preverjanja, preskusne metode in merilne instrumente za preverjanje ustreznosti nameščenih sistemov namenu, predvsem za predajo, ki se deloma izvede pred predajo, med njo in po njej. Ta evropski standard omogoča izbiro med preprostimi preskusnimi metodami, kadar so zadostne, in obsežnimi meritvami, kadar so potrebne. Ta evropski standard se uporablja za sisteme mehanskega prezračevanja in klimatizacije iz standarda EN 12792, ki so sestavljeni iz: – zračne naprave in enote, – centralne enote, – sistemi za porazdelitev zraka (dovod, odstranjevanje, odvod), – naprave za zaščito pred ognjem, – naprave za samodejni nadzor. Merilne metode, opisane v tem evropskem standardu, se uporabijo, ko je sistem nastavljen, prilagojen in uravnan. Ta evropski standard ne velja za: – sisteme generiranja toplote in krmiljenje teh sistemov, – hladilne sisteme in krmiljenje teh sistemov, – porazdelitev grelnega in hladilnega sredstva v centralnih enotah, – sisteme stisnjenega zraka, – sisteme za pripravo pitne vode, – centralni parni sistemi za vlaženje zraka, varnostno napajanje. Ta evropski standard se uporablja za sisteme za prezračevanje in klimatizacijo, ki so namenjeni vzdrževanju udobnih pogojev v zgradbah. Ne uporablja se za sisteme za nadzor industrijskih ali drugih okolij za posebne postopke. Vendar se lahko za tak primer uporabi, če je sistemska tehnologija podobna tehnologiji omenjenih sistemov za prezračevanje in klimatizacijo. Ta evropski standard ne vključuje zahtev za pogodbe o namestitvi. Vendar je treba zaradi lažje uporabe tega standarda pri pogodbi o namestitvi upoštevati določbe, navedene dodatku F. Merilne metode iz tega evropskega standarda se lahko uporabljajo v okviru energetskih pregledov klimatskih sistemov v skladu z Direktivo 2010/31/EU o energetski učinkovitosti stavb (glej standarda EN 15239, EN 15240). Ta evropski standard se lahko uporablja za prezračevalne sisteme v stanovanjih in hišah.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Prüf- und Messverfahren für die Übergabe raumlufttechnischer AnlagenVentilation des bâtiments - Procédures d'essai et méthodes de mesure pour la réception des installations de conditionnement d'air et de ventilationVentilation for buildings - Test procedures and measurement methods to hand over air conditioning and ventilation systems91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 12599:2012SIST EN 12599:2013en,fr,de01-februar-2013SIST EN 12599:2013SLOVENSKI
STANDARDSIST EN 12599:2001SIST EN 12599:2000/AC:20041DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12599
October 2012 ICS 91.140.30 Supersedes EN 12599:2000English Version
Ventilation for buildings - Test procedures and measurement methods to hand over air conditioning and ventilation systems
Ventilation des bâtiments - Procédures d'essai et méthodes de mesure pour la réception des installations de conditionnement d'air et de ventilation
Lüftung von Gebäuden - Prüf- und Messverfahren für die Übergabe raumlufttechnischer Anlagen This European Standard was approved by CEN on 25 August 2012.
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-CENELEC 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-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12599:2012: ESIST EN 12599:2013
Completeness check . 25A.1 Documents . 25A.1.1 List of agreed specifications: . 25A.1.2 Inventory documents: . 26A.1.3 Documents for operation and maintenance: . 26A.2 Tests . 26A.2.1 General inspection of: . 26A.2.2 Balancing. 27A.2.3 Separate tests of: . 27A.3 Test Report for the completeness check . 30Annex B (informative)
Functional checks . 31B.1 General . 31B.2 Separate checks for components . 31B.2.1 Central devices, fans . 31B.2.2 Heat exchanger . 31B.2.3 Air filter . 32B.2.4 Humidifier . 32B.2.5 Multi leaf dampers . 32B.2.6 Fire and smoke dampers . 32B.2.7 Mixing section . 32B.2.8 Ductwork . 32B.2.9 Air flow pattern in the room as a function of the air terminal devices and geometrical obstacles . 32B.2.10 Control devices and switch cabinets . 32Annex C (normative)
Determination of the extent of functional checks or measurements . 34C.1 General . 34C.2 Parameters and similar locations . 34C.2.1 Parameter . 34C.2.2 Similar locations . 34C.3 Determination of the total number n of similar locations . 34C.4 Extent of checks or measurements . 35Annex D (normative)
Measuring methods and measuring devices for functional measurements . 37D.1 Measurement of the air flow rate . 37D.1.1 General . 37D.1.2 Measurement in the duct cross-section . 37D.1.3 Measurement with throttle devices . 43D.1.4 Measurement in the cross-section of a chamber, the fan-casing or device . 43D.1.5 Measurement at the air terminal devices . 43D.1.6 Measuring devices (Examples) . 47D.2 Measurement of the indoor air velocity . 48D.2.1 Measuring methods . 48D.2.2 Measuring devices . 48D.3 Measurement of air temperature . 49D.3.1 Measuring methods . 49D.3.2 Measuring devices . 50D.4 Measurement of the air humidity . 50D.5 Measurement of the sound level . 51D.6 Measurement of the electrical power of the fan . 51D.6.1 Measuring method . 51D.6.2 Measuring equipment . 53D.6.3 Measuring section . 53D.6.4 Measurement uncertainties . 53D.7 Pressure difference at the air filter . 54D.8 Air leakage . 54D.8.1 Measuring method . 54SIST EN 12599:2013
Special measurements . 56E.1 Measuring instruments . 56E.2 Measuring of parameters . 56E.2.1 Pressure . 56E.2.2 Temperature . 58E.2.3 Humidity . 62E.2.4 Air flow . 62E.2.5 Sound . 69E.2.6 Air pollution . 69E.2.7 Electric Power . 72E.3 Measurements in rooms . 72E.3.1 General . 72E.3.2 Thermal environment . 72E.3.3 Ventilation effectiveness . 73E.3.4 Acoustic environment . 74Annex F (informative)
Contractual agreements . 75Annex G (informative)
Examples for determination of the number of functional checks and measurements . 76G.1 Functional checks. 76G.2 Functional measurements . 77Annex H (informative)
Examples for measurement uncertainty . 78H.1 Measuring equipments for measuring of the velocity and the cross-section . 78H.2 Velocity measurement by Pitot Static Tube (Prandtl tube) . 78H.3 Example as H.1 using the same references but lower velocity, larger distance . 79H.4 Example: Measurement of velocity by axial vane anemometer . 79Annex I (informative)
Examples of measuring protocols for the air-flow rate . 81Bibliography . 85 SIST EN 12599:2013
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
EN 13779, Ventilation for non-residential buildings — Performance requirements for ventilation and room-conditioning systems EN 14239, Ventilation for buildings — Ductwork — Measurement of ductwork surface area EN 15423:2008, Ventilation for buildings — Fire precautions for air distribution systems in buildings
EN 15726, Ventilation for buildings — Air diffusion — Measurements in the occupied zone of air conditioned/ventilated rooms to evaluate thermal and acoustic conditions EN 15780, Ventilation for buildings — Ductwork — Cleanliness of ventilation systems EN 60584-1, Thermocouples — Part 1: Reference tables (IEC 60584-1) EN 60584-2, Thermocouples — Part 2: Tolerances (IEC 60584-2) EN 60751, Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751) EN 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications (IEC 61672-1) EN ISO 3740, Acoustics — Determination of sound power levels of noise sources — Guidelines for the use of basic standards (ISO 3740) EN ISO 3744, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane (ISO 3744) EN ISO 3746, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746) EN ISO 3747, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering/survey methods for use in situ in a reverberant environment (ISO 3747) SIST EN 12599:2013
A summary of the different tests and measurements is included in Table 1. SIST EN 12599:2013
Table 1 — Summary of tests, measurements and report to verify the quality of the systems Required Steps PurposeActivitiesAnnexesStep a Completeness checks To ensure that the ventilating and air conditioning system has been installed entirely in accordance with contract 1. Comparison of equipment with the installation list 2. Compliance with technical rules (contract and official) 3. Accessibility 4. Cleanliness 5. Balancing 6. Air tightness 7. Documents necessary for operating Annex A With more specified information on the activities 1 to 7 Step b Functional checks Verifying the operation of the system 1. Put system into use 2. Operation of components and system Annex C Determination of extent Annex B Survey of performance of components and systems Step c Functional measurements Verifying on a statistical basis that the system achieves the values according to design 1. Determine which measurements and recordings are necessary 2. Extent of functional measurements, specified by means of classes A, B, C and D 3. Measurements 4. Accompanying measurements (see 6.4) Annex C Determination of extent Annex D Measuring methods and measuring devices Step d Special measurements (if necessary) In case of doubts concerning the quality of parts of the system after application of steps a to c or especially agreed. 1. Determine which measurements and recordings are necessary 2. Determine uncertainty of the measurements 3. Measurements Annex D + E Measuring methods and measuring devices and Special measurements Step e Report See chapter 9
1. Report 2. Handing over the report
Annex A
Example of completeness check report
Annex I Examples of measuring protocols
The purpose of the functional check is to prove the operation of installation in different operational conditions in compliance with the relevant technical rules and the specification. The check shows whether the particular elements of the system such as filters, fans, heat exchangers, coolers, humidifiers etc. have been properly installed. 5.2 Put system into use
Put the system in running, adjusted and safe condition. Adjustment protocols and operation instructions shall be available. 5.3 Procedure Functional checks shall be carried out on every kind of installed equipment. Before starting the checks, a checklist shall be drawn up. The extent of functional checks is defined in Annex C. The locations for the checks shall be the subject of prior agreement by the parties concerned. Instruction for the procedure and a list of usual functional checks are given in Annex B. SIST EN 12599:2013
The purpose of the functional measurements is to give proper assurance that the system achieves the design conditions and set points as specified. When judging the results of measurements in a ventilated or air conditioned space the influence of physical characteristics of the building should be taken into account. Functional measurements can take place at other conditions than design conditions. The measurements are allowed to be calculated into design conditions if the calculation is possible. (e.g. possible: heat exchanger, not possible: air flow pattern) 6.2 Range of functional measurements
Table 2 indicates which measurements and recordings are necessary for each type of ventilation and air conditioning system. The extent of functional measurements is defined in Annex C. Table 2 — Functional measurements Measurement at Total System Central System/Appliance Ductwork Room Parameters
Additional cleanliness test Current drawn and power by the motor [D.6] air flow *) [D.1] air temperature *) [D.3] pressure drop across filter [D.7] ductwork leakage test [D.8] supply air flow [D.1] exhaust air flow [D.1] supply air temperature **) and air temperature in the room [D.3] air humidity [D.4] sound pressure level [D.5] Indoor air velocity [D.2] Ventilation System (F) Z 2 1 1 0 1 2 1 2 0 0 2 0 (F) H 2 1 1 1 1 2 1 2 2 0 2 2 (F) C 2 1 1 1 1 2 1 2 2 2 2 2 (F) M/D 2 1 1 1 1 2 1 2 2 1 2 2 Partial air conditioning system (F) HC 2 1 1 1 1 2 1 2 1 2 2 2 (F) HM/HD/CM/CD 2 1 1 1 1 2 1 2 1 1 2 2 (F) MD 2 1 1 1 1 2 1 2 2 1 2 2 (F) HCM/MCD/CHD/HMD 2 1 1 1 1 2 1 2 1 1 2 2 Air conditioning system (F) HCMD 2 1 1 1 1 2 1
2 1 1 2 2
*) Outdoor air, supply and exhaust air **) Depending on control principles, if relevant SIST EN 12599:2013
0 measurement not necessary 1 to carry out in all cases 2 to carry out only in the case of contracted agreement
Figures 0-2 indicate whether there has to be a test within the stage of functional measurements during the handing over. Some of the tests are already done by the installer prior to the handing over and the documentation shall be verified in the completeness check. C cool D dehumidify F filter H heat M humidify (moisture) Z without any thermodynamic air handling functions (zero) 6.3 Procedure Before starting the functional measurement, the measuring locations shall be specified and the procedures and measuring devices shall be agreed upon and given in the technical documents. The number of measuring points in a room should take into account the floor area and the measured parameters. At least one measuring position is required for measurements in rooms of area up to 20 m² ; larger rooms should be subdivided accordingly. For the measurements in the room, the measuring positions in the occupied zone shall be agreed between the parties concerned, preferably at positions intended for intensive occupancy. With regard to the selection of the measuring instruments the overall uncertainty shall be taken into account. Calibrated devices shall be used. The indoor climate factors and air flow rates, heating, cooling and humidifying performances, electrical characteristics and other design data shall be measured at the ventilation system design air flow rate. The permissible uncertainties of the measured values are given in Table 3.
Table 3 — Permissible uncertainty of the measurement
Parameter Uncertainty*) Air flow rate, each individual room ± 15 % Air flow rate, each system ± 10 % Supply air temperature
± 2 °C Relative humidity [RH] ± 15 % RH Air velocity in occupied zone ± 0,05 m/s Air temperature in occupied zone ± 1,5 °C A-weighted sound pressure level in the room ± 3 dBA *) This European Standard does not define tolerances for the design values itself. The result is accepted when the design value is in the range of the uncertainty of the measurement.
6.4.1 General Annex D provides information concerning measuring methods and devices which are adequate for the functional measurement. In the case of measurements in ducts and air conditioning systems with negative pressure, measuring errors due to an infiltration by the measuring device opening of air shall be avoided. In any case, the openings in the ducts have to be closed after measuring. 6.4.2 Measurement of the air flow rate
The air flow rate can be evaluated by different methods. Usually, it is calculated from the air velocity and the corresponding cross-section. The air velocity can be measured by means of an appropriate anemometer, Pitot Static Tube (Prandtl tube) or a pressure drop across a throttling device. Air flow rates should be measured at an appropriate cross-section of a duct. As air velocity is seldom uniform, it should be measured at an appropriate number of locations in the cross-section and averaged for the mean velocity.
The total air flow rate of a system should preferably be measured within the air handling unit or fan casing with integrated measurement if equipment like inlet nozzles is available.
For air terminal devices, other methods (e.g. bag method, reference pressure methods or funnel measurement) can be applied. The air terminal devices with a low pressure drop should be measured by means of the compensation method or other methods with a non-significant pressure drop. The different measuring methods and devices are described in D.1. 6.4.3 Measurement of the ductwork leakage
The leakage of the ductwork is important for the energy efficiency of the complete air conditioning system. The tightness class according to EN 1507 and EN 12237 shall be checked.
In large and complex air duct systems, the leakage can only be measured in a part of the system. The leakage measurement shall be performed while the duct is being installed and accessible. After start of operation a second tightness test can be necessary, only if an irregularity happens during the start up. (In the case of a malfunction e.g. of fire dampers, the pressure can exceed the allowed pressure and damage the ductwork.) The measuring methods and devices are described in D.8. 6.4.4 Measurement of the indoor air velocity
Indoor air flow is usually a turbulent flow. The air velocity varies from place to place within the room, the variations being random with regard to magnitude and direction. Therefore, an exact measurement of the air velocity is complicated. Generally, it is sufficient to measure the mean air velocity at selected positions (see D.2.1). In rooms up to approximately 20 m² floor area, one measurement position is sufficient. Large rooms (e.g. landscaped offices) should be measured on the similar basis to the foregoing and positions in the occupied zone should be chosen where higher air velocities can be expected. Measurements should preferably be taken at positions intended for intensive occupancy, e.g. at the desk in an office. SIST EN 12599:2013
Air temperature measurements may be required in the room, at the exhaust air terminal device or in the duct. When – due to high or low surface temperatures (windows, cooling/heating panels etc.) – thermal discomfort is suspected, it may be necessary to evaluate the operative temperature (see D.3.1). The measurement of the air temperature is described in D.3. 6.4.6 Measurement of the air humidity
The measurements of the air humidity in the room provide information regarding the humidifying or dehumidifying operation of the system. In general, the relative humidity is measured. To calculate the absolute humidity it is also necessary to measure the air temperature at the same location.
The use of recording instruments is necessary. The recording period shall last for 24 h at least. The measurement of the air humidity is described in D.4. 6.4.7 Measurement of the sound pressure level
The A-weighted sound pressure level shall be determined at places of work. Corresponding conditions within the room are given in CR 1752.
Outside the building, measurements of sound pressure level can be necessary at locations such as property boundaries or 0,5 m in front of a neighbouring open window taking account of any special conditions. In all cases the background sound pressure level shall additionally be recorded when the system is not in operation. The measurement of the sound pressure level is described in D.5. 6.4.8 Measurement of the electrical power of the fan
The electrical power (including auxiliary) consumed is measured either directly by a power meter (watt-meter) or indirectly from the electrical work (kWh-meter) performed by taking the electric meter readings before and after the test for a measured period of time. For three-phase motors the power is determined by the 2-watt-meter method. For single phase motors, the power is determined by the 1-watt-meter method. Specific requirements shall be considered when a frequency converter is being used. The measurement of the electrical power of the fan is described in D.6. 6.4.9 Measurement of the pressure difference at the air filter Check that the filter is properly installed and is seated with no visible leaks.
The measurement of the pressure difference across the air filter is described in D.7. 6.5 Accompanying measurements The following data can be determined and registered if required in order to record the operating conditions during the functional test: outdoor temperature and humidity, hot and cold water temperature at the distributor or at the air heater and air cooler, SIST EN 12599:2013
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