SIST EN 14511-3:2008
(Main)Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods
Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods
This part of EN 14511 specifies the test methods for the rating and performance of air and water-cooled air conditioners, liquid chilling packages, air-to-air, water-to-air, air-to-water and water-to-water heat pumps with electrically driven compressors when used for space heating and cooling.
It also specifies the method of testing and reporting for heat recovery capacities, system reduced capacities and the capacity of individual indoor units of multisplit systems, where applicable.
This European Standard applies to factory made units that can be ducted.
This standard applies to factory made liquid chilling packages with integral condensers or for use with remote condensers.
This standard applies to factory-made units of either fixed capacity or variable capacity by any means.
Packaged units, single split and multisplit systems are covered by this standard. Single duct and double duct units are covered by the standard.
In the case of units consisting of several parts, the standard applies only to those designed and supplied as a complete package, except for liquid chilling packages with remote condenser.
This standard is primarily intended for water and brine chilling packages but can be used for other liquid subject to agreement.
This standard applies to air-to-air air conditioners which evaporate the condensate on the condenser side.
The units having their condenser cooled by air and by the evaporation of external additional water are not covered by this standard.
This standard does not apply to units using transcritical cycles, e.g. with CO2 as refrigerant.
Installations used for heating and/or cooling of industrial processes are not within the scope of this standard.
NOTE 1 Part load testing of units is dealt with in CEN/TS 14825.
NOTE 2 All the symbols given in this text should be used regardless of the language used.
Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen mit elektrisch angetriebenen Verdichtern für die Raumbeheizung und Kühlung - Teil 3: Prüfverfahren
Dieser Teil der EN 14511 legt die Prüfverfahren für die Einstufung und Leistung von luft- und wassergekühlten
Luftkonditionierern, Flüssigkeitskühlsätzen, Luft/Luft-, Wasser/Luft-, Luft/Wasser- und Wasser/Wasser-
Wärme-pumpen mit elektrisch angetriebenen Verdichtern für die Raumheizung und -kühlung fest.
Er legt ferner Verfahren fest zur Prüfung und Angabe von Wärmerückgewinnungsleistungen, systemreduzierten
Leistungen sowie der Leistung von Einzelgeräten von Multi-Split-Systemen für die Aufstellung im
Innenraum, soweit zutreffend.
Diese Europäische Norm gilt für fabrikmäßig zusammengebaute Geräte, die mit Luftkanalanschlüssen versehen
sein können.
Diese Norm gilt für fabrikmäßig zusammengebaute Flüssigkeitskühlsätze, die mit eingebauten Verflüssigern
oder mit getrennt angeordneten Verflüssigern betrieben werden.
Diese Norm gilt für fabrikmäßig zusammengebaute Geräte mit fest eingestellter oder durch beliebige Vorrichtungen
zu verändernder Leistung (variable Leistung).
Kompaktgeräte, Einzelgeräte in Split-Bauweise und Multi-Split-Systeme fallen unter den Anwendungsbereich
dieser Norm. Geräte mit Ein- und Zweikanalsystemen werden ebenfalls in dieser Norm behandelt.
Wenn die Geräte aus mehreren Teilen bestehen, gilt diese Norm mit der Ausnahme von Flüssigkeitskühlsätzen
mit getrennt angeordnetem Verflüssiger nur für die Teile, die als vollständige Baueinheit konstruiert
und geliefert werden.
Diese Norm gilt hauptsächlich für Wasser- und Solekühlsätze, kann jedoch bei Vereinbarung auf weitere
Flüssigkeitskühlsätze angewendet werden.
Diese Norm gilt für Luft/Luft-Luftkonditionierer, die das Kondensat auf der Verflüssigerseite verdampfen.
Geräte, deren Verflüssiger durch Belüftung und durch Verdampfung von zusätzlichem, von außen zugeführtem
Wasser abgekühlt wird, werden in dieser Norm nicht behandelt.
Diese Norm gilt nicht für Geräte, bei denen, z. B. mit CO2 als Kältemittel, der Kreisprozess transzyklisch betrieben
wird.
Anlagen für die Beheizun
Climatiseurs, groupes refroidisseurs de liquide et pompes à chaleur avec compresseur entraîné par moteur électrique pour le chauffage et la réfrigération des locaux - Partie 3: Méthodes d'essai
La présente partie de lEN 14511 spécifie les méthodes dessai relatives à la détermination des caractéristiques
de performance des climatiseurs à condensation par air et à condensation par eau, des groupes refroidisseurs de
liquide et des pompes à chaleur air/air, eau/air, air/eau et eau/eau, avec compresseur entraîné par moteur
électrique, lorsquils sont utilisés pour le chauffage et la réfrigération des locaux.
Elle spécifie aussi la méthode dessai et de rapport pour les puissances calorifiques de récupération, les
puissances réduites de système et la puissance individuelle des unités intérieures des systèmes multi-split, le cas
échéant.
La présente Norme européenne sapplique aux appareils fabriqués en usine qui peuvent être raccordés.
La présente norme sapplique aux groupes refroidisseurs de liquide autonomes fabriqués en usine ou conçus
pour être utilisés avec des condenseurs fournis séparément.
La présente norme sapplique aux appareils fabriqués en usine de capacité fixe ou variable par tous moyens.
La présente norme couvre les systèmes monoblocs, à deux éléments séparés et multi-split. La présente norme
couvre les appareils à simple et à double raccordement.
Dans le cas dappareils à éléments séparés, la présente norme ne sapplique quaux appareils conçus et fournis
comme un ensemble, sauf pour ce qui concerne les groupes refroidisseurs de liquide avec condenseur séparé.
La présente norme est principalement destinée aux groupes refroidisseurs deau et deau glycolée mais peut être
utilisée, après accord, pour dautres liquides.
La présente norme sapplique aux climatiseurs air/air qui évaporent les condensats du côté condenseur.
La présente norme ne couvre pas les appareils ayant leur condenseur refroidi par air et par évaporation deau
dun circuit supplémentaire externe.
La présente norme ne couvre pas les appareils utilisant des cycles transcritiques, par exemple avec CO2
comme fluide frigorigène.
La présente norme ne sapplique
Klimatske naprave, enote za tekočinsko hlajenje in toplotne črpalke z električnimi kompresorji za segrevanje in hlajenje prostora - 3. del: Preskusne metode
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen mit elektrisch angetriebenen Verdichtern für die Raumbeheizung und Kühlung - Teil 3: PrüfverfahrenClimatiseurs, groupes refroidisseurs de liquide et pompes à chaleur avec compresseur entraîné par moteur électrique pour le chauffage et la réfrigération des locaux - Partie 3: Méthodes d'essaiAir conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods91.140.30VLVWHPLVentilation and air-conditioning27.080Heat pumps23.120QDSUDYHVentilators. Fans. Air-conditionersICS:Ta slovenski standard je istoveten z:EN 14511-3:2007SIST EN 14511-3:2008en,fr,de01-maj-2008SIST EN 14511-3:2008SLOVENSKI
STANDARDSIST EN 14511-3:2004/AC:2005SIST EN 14511-3:20041DGRPHãþD
SIST EN 14511-3:2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14511-3November 2007ICS 23.120Supersedes EN 14511-3:2004
English VersionAir conditioners, liquid chilling packages and heat pumps withelectrically driven compressors for space heating and cooling -Part 3: Test methodsClimatiseurs, groupes refroidisseurs de liquide et pompes àchaleur avec compresseur entraîné par moteur électriquepour le chauffage et la réfrigération des locaux - Partie 3 :Méthodes d'essaiLuftkonditionierer, Flüssigkeitskühlsätze undWärmepumpen mit elektrisch angetriebenen Verdichternfür die Raumbeheizung und Kühlung - Teil 3: PrüfverfahrenThis European Standard was approved by CEN on 13 October 2007.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 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 Management 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, 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© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14511-3:2007: ESIST EN 14511-3:2008
EN 14511-3:2007 (E) 2 Contents Page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Rating capacity test.6 4.1 Basic principles.6 4.1.1 Heating capacity.6 4.1.2 Cooling capacity.6 4.1.3 Heat recovery capacity.7 4.1.4 Power input of fans for units without duct connection.7 4.1.5 Power input of fans for units with duct connection.8 4.1.6 Power input of liquid pumps.8 4.1.7 Units for use with remote condenser.9 4.2 Test apparatus.9 4.2.1 Arrangement of the test apparatus.9 4.2.2 Installation and connection of the test object.10 4.3 Uncertainties of measurement.11 4.4 Test procedure.12 4.4.1 General.12 4.4.2 Output measurement for water-to-water and water-to-air units.14 4.4.3 Output measurement for cooling capacity of air-to-water and air-to-air units.14 4.4.4 Output measurement for heating capacity of air-to-water and air-to-air units.15 4.5 Test results.17 4.5.1 Data to be recorded.17 4.5.2 Cooling capacity and heat recovery capacity calculation.19 4.5.3 Heating capacity calculation.20 4.5.4 Effective power input calculation.20 5 Heat recovery test for air-cooled multisplit systems.20 5.1 Test installation.20 5.1.1 General.20 5.1.2 Three-room calorimeter method.21 5.1.3 Three-room air-enthalpy method.21 5.1.4 Two-room air-enthalpy method.21 5.2 Test procedure.21 5.3 Test results.21 6 Test report.21 6.1 General information.21 6.2 Additional information.22 6.3 Rating test results.22 Annex A (informative)
Calorimeter test method.23 Annex B (informative)
Indoor air enthalpy test method.31 Annex C (informative)
Heating capacity tests - Flow chart and examples of different test sequences.33 Annex D (informative)
Conformance criteria.37 Annex E (informative)
Symbols used in annexes.38 Annex F (informative)
Test at system reduced capacity.40 SIST EN 14511-3:2008
EN 14511-3:2007 (E) 3 Annex G (informative)
Individual unit tests.41 Bibliography.43
SIST EN 14511-3:2008
EN 14511-3:2007 (E) 4 Foreword This document (EN 14511-3:2007) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and air conditioning units”, the secretariat of which is held by AENOR. 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 2008, and conflicting national standards shall be withdrawn at the latest by May 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14511-3:2004. EN 14511 comprises the following parts under the general title "Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling“: - Part 1: Terms and definitions - Part 2: Test conditions - Part 3: Test methods - Part 4: Requirements 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, 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 14511-3:2008
EN 14511-3:2007 (E) 5 1 Scope This part of EN 14511 specifies the test methods for the rating and performance of air and water-cooled air conditioners, liquid chilling packages, air-to-air, water-to-air, air-to-water and water-to-water heat pumps with electrically driven compressors when used for space heating and cooling. It also specifies the method of testing and reporting for heat recovery capacities, system reduced capacities and the capacity of individual indoor units of multisplit systems, where applicable. This European Standard applies to factory-made units that can be ducted. This standard applies to factory-made liquid chilling packages with integral condensers or for use with remote condensers. This standard applies to factory-made units of either fixed capacity or variable capacity by any means. Packaged units, single split and multisplit systems are covered by this standard. Single duct and double duct units are covered by the standard. In the case of units consisting of several parts, the standard applies only to those designed and supplied as a complete package, except for liquid chilling packages with remote condenser. This standard is primarily intended for water and brine chilling packages but can be used for other liquid subject to agreement. This standard applies to air-to-air air conditioners which evaporate the condensate on the condenser side. The units having their condenser cooled by air and by the evaporation of external additional water are not covered by this standard. This standard does not apply to units using transcritical cycles, e.g. with CO2 as refrigerant. Installations used for heating and/or cooling of industrial processes are not within the scope of this standard. NOTE 1 Part load testing of units is dealt with in CEN/TS 14825. NOTE 2 All the symbols given in this text should be used regardless of the language used. 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 14511-1:2007, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling – Part 1: Terms and definitions EN 14511-2:2007, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling – Part 2: Test conditions 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14511-1:2007 apply. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 6 4 Rating capacity test 4.1 Basic principles 4.1.1 Heating capacity The heating capacity of air conditioners and of air-to-air or water-to-air heat pumps shall be determined by measurements in a calorimeter room or by the air enthalpy method which are described in Annex A and Annex B respectively. The heating capacity of air-to-water, water-to-water heat pumps and liquid chilling packages shall be determined in accordance 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. For steady state operation, the heating capacity shall be determined using the following formula: tcqPpH∆××=ρ (1) where: PH
is the heat capacity, in Watts; q is the volume flow rate, in cubic metres per second; ρ is the density, in kilograms per cubic metre; cp is the specific heat at constant pressure, in joules per kilogram and kelvin; ∆t is the difference between inlet and outlet temperatures, in kelvin. For the heating capacity calculation in transient operation, refer to 4.5.3.2. The heating capacity shall be corrected 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 same power (calculated in 4.1.5.1 or 4.1.6.1) which is excluded from the total power input shall be 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 same power (calculated in 4.1.5.2 or 4.1.6.2) which is included in the effective power input shall be also added to the heating capacity. 4.1.2 Cooling capacity The cooling capacity of air conditioners and of air-to-air or water-to-air heat pumps shall be determined by measurements in a calorimeter room or by the air enthalpy method which are described in Annex A and Annex B respectively. The cooling capacity of air-to-water, water-to-water heat pumps and liquid chilling packages shall be determined in accordance 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 cooling capacity shall be determined using the following formula: SIST EN 14511-3:2008
EN 14511-3:2007 (E) 7 tcqPpC∆××=ρ (2) where:
PC is the cooling capacity, in Watts; q is the volume flow rate, in cubic metres per second; ρ is the density, in kilograms per cubic metre; cp is the specific heat at constant pressure, in joules per kilogram and kelvin; ∆t is the difference between inlet and outlet temperatures, in kelvin. The cooling capacity shall be corrected for the heat from the fan or pump: a) If the fan or pump at the evaporator is an integral part of the unit, the same power (calculated in 4.1.5.1 or 4.1.6.1) which is excluded from the total power input is also added to the cooling capacity. b) If the fan or pump at the evaporator is not an integral part of the unit, the same power (calculated in 4.1.5.2 or 4.1.6.2) which is included in the effective power input is also subtracted from the cooling capacity. 4.1.3 Heat recovery capacity The heat recovery capacity of air-to-water and water-to-water heat pumps and liquid chilling packages shall be determined in accordance 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 heat recovery capacity shall be determined using the following formula: tcqPpHR∆×××=ρ (3) where:
PHR is the heat recovery capacity, in Watts; q is the volume flow rate, in cubic metres per second; ρ is the density, in kilograms per cubic metre; cp is the specific heat at constant pressure, in joules per kilogram and kelvin; ∆t is the difference between inlet and outlet temperatures in kelvin. 4.1.4 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 pressure 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. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 8 4.1.5 Power input of fans for units with duct connection 4.1.5.1 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 that is to be excluded from the total power absorbed by the unit shall be calculated using the following formula: ηepq∆× [W] (4) where: η is 0,3 by convention; ∆pe is the measured available external static pressure difference, in Pascals; q is the nominal air flow rate, in cubic meters per second. 4.1.5.2 If no fan is provided with the unit, the proportional power input which is to be included in the effective power absorbed by the unit, shall be calculated using the following formula: ηipq∆× [W] (5) where: η is 0,3 by convention; ∆pi is the measured internal static pressure difference, in Pascals; q is the nominal air flow rate, in cubic meters per second. 4.1.6 Power input of liquid pumps 4.1.6.1 If a liquid 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 formula: ηepq∆× [W] (6) where: η is 0,3 by convention; ∆pe is the measured available external static pressure difference, in Pascals; q is the nominal water flow rate, in cubic meters per second. 4.1.6.2 If no liquid pump is provided with the unit, the proportional power input which is to be included in the effective power absorbed by the unit, shall be calculated using the following formula: ηipq∆× [W] (7) SIST EN 14511-3:2008
EN 14511-3:2007 (E) 9 where: η is 0,3 by convention; ∆pi is the measured internal static pressure difference, in Pascals; q is the nominal water flow rate, in cubic meters per second. 4.1.6.3 In the case of appliances designed especially to operate on a distributing network of pressurised water without water-pump, no correction is to be applied to the power input. 4.1.7 Units for use with remote condenser The power from the auxiliary liquid pump of the remote condenser shall not be taken into account in the effective 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 adjustment of set values, stability criteria and uncertainties of measurement according to this European Standard can be fulfilled. 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 the room shall not be capable of initiating any short circuit between these two orifices, and therefore the velocity of the air flows through the room at these two locations shall not exceed 1,5 m/s when the test object is switched off. The air velocity in the room shall also not be greater than the mean velocity through the unit inlet. Unless otherwise stated by the manufacturer, the air inlet or air outlet orifices shall be not less than 1 m distant from the surfaces of the test room. Any direct heat radiation by heating units in the test room onto the unit or onto the temperature measuring points shall be avoided. 4.2.1.3 Appliances with duct connection 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. 4.2.1.4 Appliances with integral pumps For appliances with integral and adjustable water or brine pumps, the external static pressure will be set at the same time as the temperature difference. 4.2.1.5 Liquid chilling package for use with remote condenser Units for use with remote condenser are tested by using a water-cooled condenser, the characteristics of which shall enable the intended operating conditions to be achieved. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 10 4.2.2 Installation and connection of the test object 4.2.2.1 General The test object shall be installed and connected for the test as recommended by the manufacturer in his installation and operation manual. The accessories provided by option (for example heating element) are not included in the test. For single duct units, in case the manufacturer's instructions do not specify how to install the discharge duct, the following recommendations shall apply. For single ducts, the discharge duct shall be as short and straight as possible compatibly with minimum distance between the unit and the wall for correct air inlet but not less than 50 cm.
No accessory shall be connected to the discharge end of the duct.
For double duct units, the same requirements apply to both suction and discharge ducts, unless the appliance is designed to be installed directly on the wall. For multisplit systems, the test shall be performed with the system operating at a capacity ratio of 1, or as close as possible. When performing measures in heating mode, set the highest room temperature on the unit/system control device; when performing measures in cooling mode, set the lowest room temperature on the unit/system control device. For unit with open-type compressor the electric motor shall be supplied or specified by the manufacturer. The compressor shall be operated at the rotational speed specified by the manufacturer. For inverter type control units, if the manufacturer gives instructions for the setting of the frequency for each rating condition, this setting shall be done. NOTE To set up a multisplit system which incorporates an inverter-controlled compressor, skilled personnel with a knowledge of control software will be required. The manufacturer or his nominated agent should be in attendance when the system is being installed and prepared for tests. 4.2.2.2 Installation of unit consisting of several parts In the case of a unit consisting of several parts, the following installation conditions shall be complied with for the test. a) The refrigerant lines shall be installed in accordance with the manufacturer's instructions with a minimum length of 5 m and a greater length to a maximum of 7,5 m if the constraints of the test installation make
5 m not possible. b) The lines shall be installed so that the difference in elevation does not exceed 2,5 m. c) The thermal insulation of the lines shall be applied in accordance with the manufacturer's instructions. d) Unless constrained by the design, at least half of the connecting lines shall be exposed to the outside conditions, with the rest of the lines exposed to the inside conditions. 4.2.2.3 Indoor units of multisplit systems When testing a multisplit system, indoor units shall be either all non ducted or all ducted. If they are ducted, all indoor units shall be of the same model, i.e. having the same airflow rate and the same external static pressure. In case of equipment with non ducted indoor units tested using the air enthalpy method, the above requirement on ducted indoor units shall apply. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 11 4.2.2.4 Measurements Temperature and pressure measuring points shall be arranged in order to obtain mean significant values. For free air intake temperature measurements, it is required: − either to have at least one sensor per square meter and not less than four measuring points equally distributed on the air surface; − or to use a sampling device. It shall be completed by four sensors for checking uniformity if the surface area is greater than 1 m². For control cabinet air conditioners, the inlet temperature at the evaporator is measured instead of the temperature inside the control cabinet. 4.3 Uncertainties of measurement The uncertainties of measurement shall not exceed the values specified in Table 1. Table 1 — Uncertainties of measurement for indicated values Measured quantity Unit Uncertainty of measurement Liquid
- temperature inlet/outlet
- volume flow
- static pressure difference
°C
m3/s
Pa
± 0,1 K ± 1 % ± 5 Pa (∆p ≤ 100 Pa) ± 5 % (∆p > 100 Pa) Air
- dry bulb temperature
- wet bulb temperature
-
volume flow
- static pressure difference
°C
°C
m3/s
Pa
± 0,2 K ± 0,3 K ± 5 % ± 5 Pa (∆p ≤ 100 Pa) ± 5 % (∆p > 100 Pa) Refrigerant
- pressure at compressor outlet
- temperature
kPa
°C
± 1 % ± 0,5 K Concentration
- Heat transfer medium
%
± 2 % Electrical quantities
- electric power
- voltage
- current
- electrical energy
W
V
A
kWh
± 1 % ± 0,5 % ± 0,5 % ± 1 % Compressor rotational speed
min-1 ± 0,5 %
The heating or cooling capacities measured on the liquid side shall be determined within a maximum uncertainty of 5 % independent of the individual uncertainties of measurement including the uncertainties on the properties of fluids. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 12 The steady state heating or cooling capacities determined using the calorimeter method shall be determined with a maximum uncertainty of 5 %, independent of the individual uncertainties of measurement including the uncertainties on the properties of fluids. Heating capacity determined during transient operation (defrost cycles) using the calorimeter method shall be determined with a maximum uncertainty of 10 %, independent of the individual uncertainties of measurement including the uncertainties on the properties of fluids. The heating and cooling capacities measured on the air side using the air enthalpy method shall be determined with a maximum uncertainty of 10 %, independent of the individual uncertainties of measurement including the uncertainties on the properties of fluids. 4.4 Test procedure 4.4.1 General 4.4.1.1 All units The test conditions are given in EN 14511-2. If liquid heat transfer media other than water are used, the specific heat capacity and density of such heat transfer media shall be determined and taken into consideration in the evaluation. Table 4 states permissible deviations of the measured values from the test conditions. 4.4.1.2 Non ducted units For non ducted units, the adjustable settings such as louvers and fan speed shall be set for maximum air flow. 4.4.1.3 Ducted units The volume flow and the pressure difference shall be related to standard air and with dry evaporator. The air flow rate given by the manufacturer shall be converted into standard air conditions. The air flow rate setting shall be made when the fan only is operating, at standard air conditions. The rated airflow rate given by the manufacturer shall be set and the resulting external static pressure (ESP) measured. This ESP shall be greater than the minimum value given in Table 2 for comfort air conditioners and Table 3 for close control air conditioners but not greater than 80 % of the maximum external static pressure specified by the manufacturer. If the fan of the unit has an adjustable speed, it shall be adjusted to the lowest speed that provide the minimum ESP or greater. If the maximum ESP of the unit is lower than the minimum ESP given in Table 2 or Table 3, then the air flow rate is lowered to achieve an ESP equal to 80 % of the maximum ESP of the manufacturer. In case this ESP is lower than 25 Pa, the unit can be considered as a free delivery unit and be tested as a non ducted unit with an ESP of 0 Pa. SIST EN 14511-3:2008
EN 14511-3:2007 (E) 13 Table 2 — Pressure requirement for comfort air conditioners Standard capacity
ratings kW Min
...
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