SIST EN 1397:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wärmeübertrager - Wasser-Luft-Ventilatorkonvektoren - Prüfverfahren zur LeistungsfeststellungÉchangeurs thermiques - Ventilo-convecteurs à eau - Procédures d'essai pour la détermination des performancesHeat exchangers - Hydronic room fan coil units - Test procedures for establishing the performance27.060.30Grelniki vode in prenosniki toploteBoilers and heat exchangersICS:Ta slovenski standard je istoveten z:EN 1397:2015SIST EN 1397:2015en,fr,de01-oktober-2015SIST EN 1397:2015SLOVENSKI
STANDARDSIST EN 1397:19991DGRPHãþD



SIST EN 1397:2015



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1397
August 2015 ICS 27.060.30 Supersedes EN 1397:1998English Version
Heat exchangers - Hydronic room fan coil units - Test procedures for establishing the performance
Échangeurs thermiques - Ventilo-convecteurs à eau - Procédures d'essai pour la détermination des performances Wärmeübertrager - Wasser-Luft-Ventilatorkonvektoren - Prüfverfahren zur Leistungsfeststellung This European Standard was approved by CEN on 3 July 2015.
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
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1397:2015 ESIST EN 1397:2015



EN 1397:2015 (E) 2 Contents Page
European foreword .3 1 Scope .4 2 Normative references .4 3 Terms and definitions .4 4 Designation of fan coil units .6 5 Symbols .6 6 Air flow rate test for ducted units .7 6.1 General conditions .7 6.2 Test installation .7 6.3 Pressure settings .8 6.4 Standard rating conditions .9 6.5 Test procedure .9 6.6 Data to be recorded . 10 7 Capacity rating tests . 10 7.1 General conditions . 10 7.2 Test room . 10 7.3 Installation of the test object . 11 7.4 Standard rating conditions . 11 7.5 Test method . 12 7.6 Measurements criteria . 13 7.7 Uncertainties of measurement from indicated values . 15 7.8 Test duration . 15 7.9 Data to be recorded . 16 8 Performance tests. 17 8.1 General . 17 8.2 Test conditions . 17 8.3 Sweat test . 17 8.4 Condensate disposal test . 17 9 Test report . 18 9.1 General information . 18 9.2 Additional information . 18 9.3 Test results . 18 10 Manufacturer's data . 19 Annex A (informative)
Drawings of the different types of configurations of fan coil units . 20 Annex B (informative)
Air flow rate test for non-ducted units . 23 Annex C (normative)
Design of separation partition for testing of cassette type fan coil units . 25
SIST EN 1397:2015



EN 1397:2015 (E) 3 European foreword This document (EN 1397:2015) 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 February 2016 and conflicting national standards shall be withdrawn at the latest by February 2016. 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 1397:1998. The main modifications with regard to the previous edition include: — modification of the scope, with the inclusion of ducted units < 120 Pa; — revision of test conditions and technical requirements to be consistence with CEN/TC 113 standards; — revision of test methods; — addition of an informative annex for measurement of the inlet air flow rate for non-ducted units; — deletion of the clause about sound power level measurement that will be dealt with in EN 16583. 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, 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. SIST EN 1397:2015



EN 1397:2015 (E) 4 1 Scope This European Standard applies to hydronic fan coil units (FCU) as factory-made single assemblies which provide the functions of cooling and/or heating but do not include the source of cooling or heating. This European Standard covers both air free delivery and air ducted units with a maximum external static pressure due to duct resistance of 120 Pa max. This European Standard applies to all types of fan speed control of a fan coil unit (variable speed, multispeed). This European Standard deals with the cooling and heating functions of the FCU considered as an emitter for cooling/heating of a room/space. It does not cover any ventilation function of the unit. If the FCU can also provide fresh air, this function is not considered and the fresh air inlet closed during testing. This European Standard provides a method for the determination of the thermal performance of fan coil units in standard conditions, for the use with hot or chilled water or water mixtures. The test procedures given in this standard may additionally be used for determining performance at other conditions. It also provides the method for the determination of the air flow rate supplied by the fan coil unit. This standard does not cover the rating of heating or cooling from direct expansion coils or heating from electric resistance elements. The standard does not cover acoustic performance of fan coil units which is dealt with in EN 16583. It is not the purpose of this standard to specify the tests used for production or field testing. NOTE For the purpose of remaining clauses, the term “unit” is used to mean “fan coil unit” as defined in 3.1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5801, Industrial fans — Performance testing using standardized airways 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hydronic fan-coil unit factory-made single assembly which provides one or more of the functions of forced circulation of air, heating, cooling, dehumidification and filtering of air, but which does not include the source of heating or cooling Note 1
to entry: This device includes at least a liquid-to-air heat exchanger and a fan, and may be designed for free or ducted intake air and/or for free or ducted delivery of supply air. SIST EN 1397:2015



EN 1397:2015 (E) 5 3.2 heating capacity total heat added to the air by the unit 3.3 total cooling capacity total heat removed from the air by the unit which is the sum of the sensible and latent cooling capacities 3.4 sensible cooling capacity heat which is removed from the air by means of a dry-bulb temperature drop 3.5 latent cooling capacity heat which is removed from the air by condensation of water vapour on the cooling coil 3.6 total electric power input total electric power absorbed by the unit, including fan(s) and auxiliary devices but excluding any electrical resistance heater 3.7 2-pipe fan coil unit fan coil unit having a single coil, one supply pipe, supplying either cold or hot water to the unit, and one return pipe Note 1 to entry: The fan coil unit can include an electrical resistance for heating purpose. 3.8 4-pipe fan coil unit fan coil unit having one coil with two independent water circuits for cooling and heating, or two independent cooling/heating coils 3.9 standard rating condition mandatory condition that is used for comparison purposes 3.10 application rating condition optional rating condition which provides additional information on the performance of the unit 3.11 standard fan speed fan speed setting declared by the manufacturer and used for setting the air flow rate conditions of ducted units Note 1 to entry: The fan speed setting can be declared by the manufacturer as a certain wiring, a switch position or a steering voltage. 3.12 external static pressure positive pressure difference measured between the air outlet and inlet sections of the unit 3.13 liquid pressure drop negative pressure difference measured between the outlet and inlet connections of the liquid circuit of the unit SIST EN 1397:2015



EN 1397:2015 (E) 6 4 Designation of fan coil units Fan coil units can be ducted or non-ducted. They can be standing on the floor, hung on the wall, or fitted into the ceiling or floor, with the inlet and outlet air sections located either on the front, back, bottom or top of the unit. Annex A provides a series of drawing schemes associated to designations to show typical existing configurations. 5 Symbols For the purposes of this document, the symbols indicated in Table 1 apply. Table 1 — Symbols Symbol Description Unit cpL Specific heat capacity of liquid kJ/(kg K) hL1 Specific enthalpy of liquid at inlet connection (= cpL1 × tL1) kJ/kg hL2 Specific enthalpy of liquid at outlet connection (= cpL2 × tL2) kJ/kg ûhw Vaporization heat of water (constant = 2460) kJ/kg n1 Rotational speed of the fan at air flow test min-1 n2 Rotational speed of the fan at capacity test min-1 Pelec Total power input W Plat Latent cooling capacity W Psens Sensible cooling capacity W PC Total cooling capacity W PH Heating capacity W Patm Atmospheric pressure kPa pA External static pressure Pa qmA Mass flow rate of air kg/s qmL Mass flow rate of liquid g/s qmW Mass flow rate of condensate (air side) g/s tL1 Liquid inlet temperature °C tL2 Liquid outlet temperature °C tA Air inlet dry bulb temperature °C tAdp Air inlet dew point temperature °C tAw Air inlet wet bulb temperature °C ûpL Liquid side pressure drop kPa SIST EN 1397:2015



EN 1397:2015 (E) 7 6 Air flow rate test for ducted units 6.1 General conditions The test is required to measure the outlet air flow rate of ducted units. For non-ducted units or ducted units with a declared static pressure lower than 50 Pa at standard fan speed, the test is optional and is described in the informative Annex B. For testing, the unit shall include an air filter but no any other accessory for air inlet or diffusion or others. Dampers for fresh air intake shall be closed. NOTE 1 No modification such as sealing is made on the unit before testing. If the unit includes flaps, they shall be adjusted in a fixed position according to the manufacturer instructions. If this information is not available, their position shall correspond to the maximum mechanical open position. NOTE 2 This maximum mechanical open position might differ from the minimum airflow resistance. 6.2 Test installation 6.2.1 Outlet measurement method The installation is described in Figure 1. The air flow measurement equipment consists of a test chamber, an air flow measuring device and an auxiliary fan, all in accordance with ISO 5801, installation category “B”. The discharge section of the fan coil unit shall be connected to the test chamber through a ductwork having an adjustable resistance, and made in compliance with ISO 5801. In case of several outlet sections, the ductwork shall contain all of them. For units that can be ducted at the inlet, the tests are performed without inlet duct(s).
Key 1 object under test (with 0 Pa at the inlet) 5 adjustable duct resistance (e.g. damper) 2 measured air flow 6 test chamber with airflow measuring apparatus 3 external static pressure 7 fan (may be inside or outside the discharge chamber) 4 ductwork
Figure 1 — Example of test installation (outlet measurement method) SIST EN 1397:2015



EN 1397:2015 (E) 8 6.2.2 Inlet measurement method The installation is described in Figure 2. The fan coil unit is placed in a chamber. The air flow measuring device is connected to the entrance of this chamber. The outlet section of the unit is connected to a ductwork including a damper for adjusting the external static pressure. In case of several outlet sections, the ductwork shall contain all of them.
Key 1 object under test (with 0 Pa at the inlet) 6 airflow measuring apparatus 2 measured air flow 7 fan 3 external static pressure 8 test chamber 4 ductwork 9 flow straightener 5 adjustable duct resistance (e.g. damper)
Figure 2 — Example of test installation (inlet measurement method) 6.3 Pressure settings For the standard fan speed declared by the manufacturer, the following conditions shall be fulfilled: — 0 Pa at the inlet of the unit; — an external static pressure (ESP) of 50 Pa at the outlet of the unit; — inside the test chamber a static pressure equal to 0 Pa. For air flow rate measurements at other fan speeds than the standard fan speed, the following apply: — no change in the position of the adjustable outlet duct resistance; — 0 Pa at the inlet of the unit; — inside the test chamber a static pressure equal to 0 Pa, so that the same network curve resistance is used (see Figure 3). SIST EN 1397:2015



EN 1397:2015 (E) 9
Key 1 ductwork load curve 2 reference standard speed 3 other speeds X external static pressure difference (Pa) Y flow rate Figure 3 — Setup external static pressure difference of ducted units other speeds 6.4 Standard rating conditions The air flow rate measurement shall be made in isothermal conditions with dry coil, at an ambient temperature of 20 °C and at nominal voltage and frequency as specified by the manufacturer, for all fan speeds declared by the manufacturer, with the allowable deviations as specified in Table 2. Table 2 — Permissible deviations for set values Measured quantity Permissible deviation of the arithmetic mean values from set values Permissible deviations of time-individual measured values from set values Ambient air: dry bulb temperature ± 5 K ± 5 K Voltage ± 1 % ± 2 % External static pressure ± 1 Pa ± 5 Pa 6.5 Test procedure The fan coil shall be disconnected from the cooling or heating power supply or the liquid circulation shall be stopped. Test shall be performed according to ISO 5801. SIST EN 1397:2015



EN 1397:2015 (E) 10 The fan motor shall run for at least half an hour before measuring the flow rate. The air flow rate measurement shall be conducted under steady state conditions, which are assumed to be achieved when the rotational speed of the fan motor(s) does not change by more than 1 % but not less than 10 r/min within 15 min. 6.6 Data to be recorded The data to be recorded for the air flow rate test are given in Table 3. The table identifies the general information required but is not intended to limit the data to be obtained. Table 3 — Data to be recorded
Symbol Unit Atmospheric pressure Patm kPa Voltage - V Frequency - Hz Speed control setting of the fan speed - - Total power input Pelec W Rotational speed of the fan n1 min-1 Air inlet dry bulb temperature tAl °C Air inlet dew point temperature tAldp °C Volume flow rate of air qvA m3/h Mass flow rate of air qmA kg/s External static pressure pA Pa 7 Capacity rating tests 7.1 General conditions For testing the unit shall include an air filter but no any other accessory for air inlet or diffusion or others. Dampers for fresh air intake shall be closed. NOTE No modification such as
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