EN 14511-3:2013

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 14511-3:2013SIST EN 14511-3:2013en,fr,de01-december-2013SIST EN 14511-3:2013SLOVENSKI
STANDARDSIST EN 14511-3:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14511-3
July 2013 ICS 27.080; 91.140.30 Supersedes EN 14511-3:2011English Version
Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods
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
Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen mit elektrisch angetriebenen Verdichtern für die Raumbeheizung und -kühlung - Teil 3: PrüfverfahrenThis European Standard was approved by CEN on 7 June 2013.
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 © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14511-3:2013: ESIST EN 14511-3:2013

Calorimeter test method . 26 Annex B (normative)
Indoor air enthalpy test method . 35 Annex C (informative)
Heating capacity tests - Flow chart and examples of different test sequences . 36 Annex D (informative)
Conformance criteria . 42 Annex E (informative)
Symbols used in annexes . 43 Annex F (informative)
Test at system reduced capacity . 45 Annex G (informative)
Individual unit tests . 46 Annex H (normative)
Determination of the liquid pump efficiency . 48 Annex I (informative)
Rating of indoor and outdoor units of multisplit and modular heat recovery multisplit system. 51 Annex J (normative)
Air flow rate measurement . 53 Annex ZA (informative)
Relationship between this European Standard and the requirements of Commission regulation (EC) No 206/2012 . 54 Bibliography . 55
NOTE 2 The enthalpy change ∆H can be directly measured instead of the term (cp x ∆t). 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: a) if the fan or pump at the indoor heat exchanger is an integral part of the unit, the same power (calculated in 4.1.5.2 or 4.1.6.3) which is excluded from the total power input shall be also subtracted from the heating capacity; b) if the fan or pump at the indoor heat exchanger is not an integral part of the unit, the same power (calculated in 4.1.5.3 or 4.1.6.4) 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 (see Annex A) or by the air enthalpy method (see Annex B). However, the cooling capacity of air conditioners and of air-to-air heat pumps having a cooling capacity below or equal to 12 kW shall be determined by measurements in a calorimeter room. 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: pCPqct=×××ρ∆ (2) where PC is the cooling capacity, expressed in watts; q is the volume flow rate, expressed in cubic metres per second; ρ is the density, expressed in kilograms per cubic metre; cp is the specific heat at constant pressure, expressed in joules per kilogram and Kelvin; ∆t is the difference between inlet and outlet temperatures, expressed in Kelvin. NOTE 1 The mass flow rate can be determined directly instead of the term (q x ρ). NOTE 2 The enthalpy change ∆H can be directly measured instead of the term (cp x ∆t). SIST EN 14511-3:2013

is the minimum external static pressure difference specified in Table 2 or Table 3, as applicable for an indoor unit, or 30 Pa for an outdoor unit. q is the nominal air flow rate, expressed in cubic meters per second. 4.1.5.3 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:
(5)
where η is 0,3 by convention. ∆pi is the measured internal static pressure difference, expressed in Pascal, as defined in 2.53 of EN 14511-1:2013. ESPmin
is the minimum external static pressure difference given in Table 2 or Table 3, as applicable for an indoor unit, or 30 Pa for an outdoor unit. q is the nominal air flow rate, expressed in cubic meters per second. 4.1.6 Power input of liquid pumps 4.1.6.1 The following corrections of the power input of liquid pumps shall be made to both indoor and outdoor (and heat recovery) liquid pumps, where applicable. 4.1.6.2 When the liquid pump is integrated into the unit, it shall be connected for operation. When the liquid pump is delivered by the manufacturer apart from the unit, it shall be connected for operation according to the manufacturer’s instructions and be then considered as an integral part of the unit. 4.1.6.3 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∆× (6) where η is the efficiency of the pump calculated according to Annex H; SIST EN 14511-3:2013

For single ducts, regardless of the manufacturer’s instructions, 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. If in the instructions, the manufacturer indicates a value for the temperature set on the control device for a given rating condition, then this value shall be used. 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, the setting of the frequency shall be done for each rating condition. The manufacturer shall provide in the documentation information about how to obtain the necessary data to set the required frequencies. If a skilled personnel with knowledge of control software is required for the start of the system, the manufacturer or the 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 for the test. a) The refrigerant lines shall be installed in accordance with the manufacturer's instructions. The length of the lines shall be 5 m except if the constraints of the test installation make 5 m not possible, in which case a greater length may be used, with a maximum of 7,5 m.
When testing a multisplit system in a calorimeter room, the air flow rate and the external static pressure shall be adjusted separately for each one of the ducted indoor units. When testing a multisplit system using the air enthalpy method, the air flow rate and the external static pressure shall be adjusted separately for each indoor unit, ducted or not. In case of equipment with non ducted indoor units tested using the air enthalpy method, the above requirement on ducted indoor units shall apply. 4.2.2.4 Measuring points 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, with not less than four measuring points and by restricting to 20 the number of sensors equally distributed on the free 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. Air temperature sensors shall be placed at a maximum distance of 0,25 m from the free air surface. For control cabinet air conditioners, the inlet temperature at the evaporator is measured instead of the temperature inside the control cabinet. For units consisting of a heat pump and a storage tank as a factory made unit, water inlet and outlet temperature measurements shall be taken at the inlet and outlet of this unit. For water and brine, the density in formulae (1), (2) and (3) shall be determined in the temperature conditions measured near the volume flow measuring device. 4.3 Uncertainties of measurement The uncertainties of measurement shall not exceed the values specified in Table 1. SIST EN 14511-3:2013

- temperature difference K ± 0,15 K - temperature inlet/outlet K ± 0,15 K - volume flow m3/s ± 1 % - static pressure difference kPa ± 1 kPa (ûp ≤ 20 kPa) or ± 5 %(ûp > 20 kPa) Air
- dry bulb temperature °C ± 0,2 K - wet bulb temperature °C ± 0,4K - volume flow m3/s ± 5 % - static pressure difference
Pa
± 5 Pa (∆p ≤ 100 Pa) or ± 5 %(∆p > 100 Pa)
Refrigerant
- pressure at compressor outlet kPa ± 1 % - temperature °C ± 0,5 K Concentration
- Heat transfer medium % ± 2
Electrical quantities
- electric power W ± 1 % - voltage V ± 0,5 % - current A ± 0,5 % - electrical energy kWh ± 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. 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; this maximum uncertainty is extended to 10 % for single duct units due to the air exchange between the two compartments of the calorimeter room. 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. SIST EN 14511-3:2013

(8) The setting of this airflow rate shall be made when the fan only is operating. The rated air flow rate given by the manufacturer converted into standard air conditions if necessary shall be set and the resulting ESP measured. This ESP shall also be converted into standard air conditions as follows: 22epp∆∆=e(measured)(measured)1,204ρ
(9) If the ESP is lower than the minimum value given in Table 2 (or Table 3), the air flow rate is decreased to reach this minimum value. If the ESP is greater than twice the minimum value given in Table 2 (or Table 3), the air low rate is increased to reach twice this minimum value. If the ESP is greater than the minimum value given in Table 2 (or Table 3) but not greater than twice this minimum value, then keep this ESP. The apparatus used for setting the ESP shall be maintained in the same position during all the tests. SIST EN 14511-3:2013

ratings kW Minimum external static
pressure (ESPmin) a b Pa 0 < Q < 8 25 8 ≤ Q < 12 37 12 ≤ Q < 20 50 20 ≤ Q < 30 62 30 ≤ Q < 45 75 45 ≤ Q < 82 100 82 ≤ Q < 117 125 117 ≤ Q < 147 150 Q ≥ 147 175 a For equipment tested without an air filter installed, the minimum external static pressure shall be increased by 10 Pa. b If the manufacturer’s installation instructions state that the maximum allowable discharge duct length is less than 1m, then the unit can be considered as a free delivery unit and be tested as a non ducted indoor unit with an ESP of 0 Pa.
Table 3 — Pressure requirement for close control air conditioners Capacity kW Minimum external static
Pressure (ESPmin) Pa For down-flow discharge into double floor For up-flow discharge into duct all units < 30 50 - ≥ 30 75 - All - 50
4.4.1.4 Units ducted on the outdoor heat exchanger The volume flow and the pressure difference shall be related to standard air and with dry heat exchanger. If the air flow rate is given by the manufacturer with no atmospheric pressure, temperature and humidity conditions, it shall be considered as given for standard air conditions. 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. The rated air flow rate given by the manufacturer shall be set and the resulting external static pressure (ESP) measured. If the ESP is lower than 30 Pa, the air flow rate is decrease to reach this minimum value. SIST EN 14511-3:2013

Measured quantity Permissible deviation of the arithmetic mean values from set values Permissible deviations of each of the individual measured values from set values Liquid
- inlet temperature ± 0,2 K ± 0,5 K - outlet temperature ± 0,3 K ± 0,6 K - volume flow ± 1 % ± 2,5 % - static pressure difference -- ± 10 % Air
- inlet temperature (dry bulb)a
± 0,3 K ± 1 K - inlet temperature (wet bulb) ± 0,4 K ± 1 K - volume flow ± 5 % ± 10 % - static pressure difference - ± 10 % Refrigerant
- liquid temperature ± 1 K ± 2 K - saturated vapour/bubble point temperature ± 0,5 K ± 1 K Voltage ± 4 % ± 4 % a For units with outdoor heat exchanger surfaces greater than 5 m², the deviation on the air inlet dry bulb temperature is doubled. When testing single duct units the arithmetic mean value of the difference between the dry bulb temperature of the indoor compartment and of the air introduced from the outdoor compartment should have a maximum permissible deviation of 0,3 K. This requirement also applies to the wet bulb temperature difference.
4.4.2 Output measurement for water (brine)-to-water (brine) and water (brine)-to-air units 4.4.2.1 Steady state conditions This condition is considered obtained and maintained when all the measured quantities remain constant without having to alter the set values, for a minimum duration of 30 min, with respect to the tolerances given in Table 4. Periodic fluctuations of measured quantities caused by the operation of regulation and control devices are permissible, on condition the mean value of such fluctuations does not exceed the permissible deviations listed in Table 4. 4.4.2.2 Measurement of heating capacity, cooling capacity and heat recovery capacity For the output measurement, it is necessary to record all the meaningful data continuously. In the case of recording instruments which operate on a cyclic basis, the sequence shall be adjusted such that a complete recording is effected at least once every 30 s. SIST EN 14511-3:2013
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