EN 378-4:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4: Operation, maintenance, repair and recoverySystèmes de réfrigération et pompes à chaleur - Exigences de sécurité et d'environnement - Partie 4: Fonctionnement, maintenance, réparation et récupérationKälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen - Teil 4: Betrieb, Instandhaltung, Instandsetzung und RückgewinnungTa slovenski standard je istoveten z:EN 378-4:2008SIST EN 378-4:2008en,fr,de27.20027.080ICS:SIST EN 378-4:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 378-4:200801-april-2008

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 378-4February 2008ICS 27.080; 27.200Supersedes EN 378-4:2000
English VersionRefrigerating systems and heat pumps - Safety andenvironmental requirements - Part 4: Operation, maintenance,repair and recoverySystèmes de réfrigération et pompes à chaleur - Exigencesde sécurité et d'environnement - Partie 4: Fonctionnement,maintenance, réparation et récupérationKälteanlagen und Wärmepumpen - Sicherheitstechnischeund umweltrelevante Anforderungen - Teil 4: Betrieb,Instandhaltung, Instandsetzung und RückgewinnungThis 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© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 378-4:2008: E

Draining the oil from a refrigerating system.16 Annex B (informative)
Guide specification (parameters) for recycled refrigerant.17 Annex C (informative)
Handling and storage of refrigerants.18 Annex D (informative)
In-service inspection.20 Annex E (informative)
Guidelines for repairs of equipment using flammable refrigerants.22 Bibliography.25

repairs be necessary, contact the nearest authorised repair service centre. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 378-1:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Basic requirements, definitions, classification and selection criteria EN 378-2:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2: Design, construction, testing, marking and documentation EN 378-3:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 3: Installation site and personal protection ISO 11650, Performance of refrigerant recovery and/or recycling equipment 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 378-1:2008 apply.

instructed on the basis of the instruction manual about the construction, supervision, operation and mainte-nance of the refrigerating system, as well as the safety measures to be observed, if necessary the required personal protection equipment (see EN 378-3:2008, Annex A) and the properties and handling of the refriger-ant used. NOTE It is advisable that the operating personnel are present during evacuation, charging with refrigerant and
adjustment of the refrigerating system as well as, if possible, during assembly on site. 4.3 Documentation 4.3.1 The owner / operator shall keep an updated logbook of the refrigerating system if the refrigerant charge exceeds 3 kg. 4.3.2 In the logbook the following information shall be recorded: a) details of all maintenance and repair work; b) quantities and kind of (new, reused or recycled) refrigerant which have been charged on each occasion, and the quantities of refrigerant which have been transferred from the system on each occasion, see also 6.6; c) analysis of a reused refrigerant, if available, the results of which shall also be kept in the log-book; d) source of the reused refrigerant; e) changes and replacements of components of the system; f) results of all periodic routine tests; g) record of significant periods of non-use. 4.3.3 The log-book shall either be kept by the owner / operator and in the machinery room, or the data shall be stored in a computer with a printout in the machinery room, in which case the information shall be accessi-ble to the competent person when servicing or testing.

instruction manual, see EN 378-2. NOTE 1 The frequency of such maintenance depends on the type, size, age, use etc. of the system. In many cases more than one maintenance service is required in the course of one year in accordance with legal requirements. NOTE 2 For personal protective equipment against refrigerants see EN 378-3. 5.1.2 The user / owner concerned for the refrigerating system shall ensure that the system is inspected, regularly supervised and maintained in a satisfactory manner. 5.1.3 Systems with a charge larger than 3 kg should be subject to tightness inspection at least on an annual basis. If, during the inspection the suspicion of a leak exists, e.g. through refrigerant temperature checks or capacity reduction, then leak has to be located with suitable detection equipment and should be repaired and checked again after the repair in accordance with national regulations. The results of the inspection and measures taken afterwards should be included in the logbook. Refer to Annex D for detailed specification regarding in service inspection. 5.1.4 The parties concerned for the refrigerating system shall also be responsible when another person uses the refrigerating system, unless another division of responsibility has been agreed upon. 5.1.5 Regular maintenance which does not include interference with, nor adjustment of, the refrigerating system and which requires no specialised knowledge of refrigeration can be carried out by a person of appro-priate competence employed by the person responsible. Examples of such non-specialist maintenance include air-side cleaning of heat exchangers, cleaning of
condensate systems. 5.1.6 It is not permitted to charge a refrigerating system with a refrigerant type that does not comply with the machine card nor with the specifications of the manufacturer. In the case of appliances, the refrigerant type has to conform to the rating label data. In the case of retrofitting of an installation, see 5.4. 5.1.7 In the case of refrigerating systems located within an enclosure and considered as indirect systems under EN 378-1, no unauthorised persons shall remain in the occupancy during maintenance and
repair operations since the separation between refrigerant containing parts and occupants of the room is no more effective and leaks of refrigerant into the occupancy become possible. 5.1.8 Ensure that any marking to the compressor or equipment is replaced if any of the existing text has become unreadable. 5.2 Maintenance 5.2.1 Maintenance shall be undertaken in such a way that: a) accidents to personnel are minimised; b) damage to goods is minimised; c) components of the system remain in good working order; d) the purpose and availability of the system are maintained; e) leakage of refrigerant or oil are identified and remedied;

piping); d) emptying and evacuating; e) cleaning and purging respectively (e.g. with nitrogen); f) releasing for repair; Welding or the use of arc — and flame-producing apparatus requires specific personnel and welding or braz-ing procedure approvals. g) carrying out the repair; h) testing and checking of the repaired component (pressure test, leakage test, functional test, see EN 378-2); i) replacing, evacuating and recharging with refrigerant. 5.3.2 Refrigerant leaks shall be identified and repaired as soon as practicable by a competent person. 5.3.3 During each periodic maintenance and following each repair, if appropriate, at least the following tasks shall be performed: a) all safety, control and measurement devices as well as alarm systems shall be checked to verify their
correct operation and perfect working order; b) leakage tests shall be carried out at the relevant part of the refrigerating system; c) evacuating; d) adjustment of refrigerant charge;

Figure 1 — Simplified representation of the relationship between the processes 6.1.3 Parts of refrigerating systems All parts of refrigerating systems, e.g. refrigerant, oil, heat-transfer medium, filter, drier, insulation material, shall be recovered, reused and/or disposed of properly, see 6.5. 6.1.4 Refrigerants All refrigerants shall be recovered for reuse, recycled or reclaimed for reuse, or shall be disposed of properly, see 6.5. Destruction of refrigerants can require an authorised facility for destruction. 6.1.5 Handling The method of handling of the refrigerant shall be decided before it is removed from the refrigerating system or the equipment, see also Annex C.

Figure 2 — Flow chart for recovered refrigerant 6.2.2 Recovery for general reuse For general reuse, recovered refrigerants shall be reclaimed and comply with the appropriate specification for new refrigerants. 6.2.3 Recovery for reuse in the same or similar system 6.2.3.1 For reuse in the same system For a halocarbon refrigerant, an acid test shall be carried out. NOTE 1 The acid test uses the titration principle to detect any compound that ionises as an acid. The test requires a sample of between 100 g and 120 g and has a lower detection limit of 0,1 × 10-6 by mass (0,1 ppm by mass).

returning the refrigerant to the refrigerating system. NOTE 4 It is recommended that the refrigerant is recharged through a filter drier to remove moisture which may have contaminated the fluid during recovery. 6.2.3.2 For use in a similar system The use of recycled refrigerant in a refrigerating system, which is similar in function and components, shall comply with the following requirements:  system is serviced by the competent person or company who recycled the refrigerant;  recycling equipment complies with the requirements of 6.2.4;  history of the refrigerant and the refrigerating system is known from the date of commissioning;  competent person or company informs the party concerned when recycled refrigerant is used and the source from which it comes and the result of the tests or, if necessary, of the analysis. The acid test shall be carried out in accordance with 6.2.3.1. If any of the above conditions is not met or the history of the refrigerant indicates a heavy contamination of the refrigerant, e.g. motor burnout, then the refrigerant shall be either reclaimed or disposed of properly. NOTE A recycled refrigerant should comply with the specifications in Annex B. 6.2.4 Requirements for refrigerant recycling equipment and procedures Recycling equipment for halocarbon refrigerants shall comply with ISO 11650 or similar standard require-ments. Recycling equipment shall be regularly inspected to verify that equipment and instruments are well maintained and in good order. Equipment and instruments shall be function tested and calibrated regularly. 6.2.5 Reclaim 6.2.5.1 Analysis A refrigerant sent for reclaim shall be analysed and either reclaimed or disposed of properly. 6.2.5.2 Specification After the refrigerant has been reclaimed it shall meet the specifications for new refrigerant.
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