SIST EN 378-2:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2: Design, construction, testing, marking and documentationPHQWDFLMDSystèmes de réfrigération et pompes à chaleur - Exigences de sécurité et d'environnement - Partie 2: Conception, construction, essais, marquage et documentationKälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen - Teil 2: Konstruktion, Herstellung, Prüfung, Kennzeichnung und DokumentationTa slovenski standard je istoveten z:EN 378-2:2008SIST EN 378-2:2008en,fr,de27.20027.080ICS:SIST EN 378-2:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 378-2:200801-april-2008







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 378-2February 2008ICS 27.200; 27.080Supersedes EN 378-2:2000
English VersionRefrigerating systems and heat pumps - Safety andenvironmental requirements - Part 2: Design, construction,testing, marking and documentationSystèmes de réfrigération et pompes à chaleur - Exigencesde sécurité et d'environnement - Partie 2: Conception,construction, essais, marquage et documentationKälteanlagen und Wärmepumpen - Sicherheitstechnischeund umweltrelevante Anforderungen - Teil 2: Konstruktion,Herstellung, Prüfung, Kennzeichnung und DokumentationThis 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 378-2:2008: E



EN 378-2:2008 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.6 3 Terms, definitions, designations, classification and abbreviations.9 3.1 Terms and definitions.9 3.2 Designations and classification.9 3.3 Abbreviations.9 4 Significant hazards.9 5 Safety requirements and/or measures.9 5.1 General safety and/or environmental requirements.9 5.2 Safety requirements for components and piping.10 5.3 Miscellaneous components.13 6 Requirements for assemblies.17 6.1 General.17 6.2 Design and construction.17 6.3 Testing.40 6.4 Marking and documentation.43 Annex A (normative)
Additional requirements for refrigerating systems and heat pumps with R717.48 Annex B (normative)
Determination of category for assemblies.49 Annex C (normative)
Requirements for intrinsic safety test.54 Annex D (normative)
List of significant hazards.56 Annex E (informative)
Assessment of assemblies for compliance with directive 97/23/EC.57 Annex F (informative)
Examples for arrangement of pressure relief devices in refrigerating systems.58 Annex G (informative)
Checklist for external visual inspection of the installation.61 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC.62 Annex ZB (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC.63 Bibliography.65



EN 378-2:2008 (E) 3 Foreword This document (EN 378-2:2008) has been prepared by Technical Committee CEN/TC 182 “Refrigerating systems, safety and environmental requirements”, the secretariat of which is held by DIN. 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 August 2008, and conflicting national standards shall be withdrawn at the latest by August 2008. This document supersedes EN 378-2:2000. This European Standard has been prepared under a mandate given to CEN by the European commission and the European free trade association and supports essential requirements of the EU Directives 97/23/EC and 98/37/EC. For relationship with the EU Directives, see the informative Annexes ZA (Directive 97/23/EC) and ZB
(Directive 98/37/EC), which are integral parts of this document. EN 378 consists of the following parts under the general title Refrigerating systems and heat pumps — Safety and environmental requirements:  Part 1: Basic requirements, definitions, classification and selection criteria  Part 2: Design, construction, installing, testing, marking and documentation  Part 3: Installation site and personal protection  Part 4: Operation, maintenance, repair and recovery 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 United Kingdom.



EN 378-2:2008 (E) 4 Introduction The introduction of EN 378-1:2008 is applicable. This standard is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which hazards, hazardous situations and hazardous events are covered are indicated in the scope of this standard. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built according to the provisions of this type C standard.



EN 378-2:2008 (E) 5 1 Scope This European Standard is applicable to the design, construction and installing of refrigerating systems
including piping, components and materials and including ancillary equipment directly associated with such systems. It also specifies requirements for testing, commissioning, marking and documentation. In case the heat transfer fluid is not gaseous at atmospheric pressure, the requirements for circuits for heat transfer fluids are excluded except for any safety devices associated with the refrigerating system. It is not applicable to
refrigerating systems with air or water as refrigerant and does not cover the requirements for equipment to be used in a potentially explosive atmosphere. The following ancillary equipment includes:  fan and fan motor;  electrical motor and transmission for open compressor systems. This European Standard specifies the requirements relating to stationary and mobile refrigerating systems of all sizes, including heat pumps. Systems using refrigerants other than those listed in Annex E of EN 378-1:2008 are not covered by this standard as long as a safety class is not assigned. Basic safety requirements for refrigerating systems as defined in EN 378-1 are applicable for this standard. Basic requirements for the installation site as defined in EN 378-3 apply. This European Standard is not applicable to refrigeration systems and heat pumps which are manufactured before the date of its publication as EN.



EN 378-2:2008 (E) 6 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 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper limbs EN 378-1:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Basic requirements, definitions, classification and selection criteria EN 378-3:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 3: Installation site and personal protection EN 378-4:2008, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 4: Operation, maintenance, repair and recovery EN 809:1998, Pumps and pump units for liquids — Common safety requirements EN 837-1:1996, Pressure gauges — Part 1: Bourdon tube pressure gauges — Dimensions, metrology, requirements and testing EN 837-2:1997, Pressure gauges — Part 2: Selection and installation recommendations for pressure gauges EN 837-3:1996, Pressure gauges — Part 3: Diaphragm and capsule pressure gauges — Dimensions, metrology, requirements and testing EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards EN 1050:1996, Safety of machinery — Principles for risk assessment EN 1290:1998, Non-destructive examination of welds — Magnetic particle examination of welds EN 1435:1997, Non-destructive examination of welds — Radiographic examination of welded joints EN 1714:1997, Non-destructive examination of welds — Ultrasonic examination of welded joints EN 1736:2000, Refrigerating systems and heat pumps — Flexible pipe elements, vibration isolators and expansion joints — Requirements, design and installation EN 1779:1999, Non-destructive testing — Leak testing — Criteria for method and technique selection EN 1861:1998, Refrigerating systems and heat pumps — System flow diagrams and piping and instrument diagrams — Layout and symbols EN 12178:2003, Refrigerating systems and heat pumps — Liquid level indicating devices — Requirements, testing and marking EN 12263:1998, Refrigerating systems and heat pumps — Safety switching devices for limiting the pressure — Requirements and tests EN 12284:2003, Refrigerating systems and heat pumps — Valves — Requirements, testing and marking EN 12517-1:2006, Non-destructive examination of welds — Part 1: Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography — Acceptance levels



EN 378-2:2008 (E) 7 prEN 12517-2:2006, Non destructive testing of welds — Part 2: Evaluation of welded joints in aluminium and its alloys by radiography — Acceptance levels prEN 12693:2006, Refrigerating systems and heat pumps — Safety and environmental requirements — Positive displacement refrigerant compressors EN 12735-1:2001, Copper and copper alloys — Seamless, round copper tubes for air conditioning and
refrigeration — Part 1: Tubes for piping systems EN 12735-2:2001, Copper and copper alloys — Seamless, round copper tubes for air conditioning and
refrigeration — Part 2: Tubes for equipment EN 12799:2000, Brazing — Non destructive examination of brazed joints EN 13136:2001, Refrigerating systems and heat pumps — Pressure relief devices and their associated piping — Methods for calculation EN 13313:2001, Refrigerating systems and heat pumps — Competence of personnel EN 13445-1:2002, Unfired pressure vessels — Part 1: General EN 13445-2:2002, Unfired pressure vessels — Part 2: Materials EN 13445-3:2002, Unfired pressure vessels — Part 3: Design EN 13445-4:2002, Unfired pressure vessels — Part 4: Fabrication EN 13445-5:2002, Unfired pressure vessels — Part 5: Inspection and testing EN 13445-6:2002, Unfired pressure vessels — Part 6: Requirements for the design and fabrication of pressure vessels and pressure parts constructed from spheroidal graphite cast iron EN 13445-8:2006, Unfired pressure vessels — Part 8: Additional requirements for pressure vessels of aluminium and aluminium alloys EN 13480-1:2002, Metallic industrial piping — Part 1: General EN 13480-2:2002, Metallic industrial piping — Part 2: Materials EN 13480-3:2002, Metallic industrial piping — Part 3: Design and calculation EN 13480-4:2002, Metallic industrial piping — Part 4: Fabrication and installation EN 13480-5:2002, Metallic industrial piping — Part 5: Inspection and testing EN 13480-6:2004, Metallic industrial piping — Part 6: Additional requirements for buried piping EN 13480-8:2007, Metallic industrial piping — Part 8: Additional requirements for aluminium and aluminium alloy piping EN 14276-1:2006, Pressure equipment for refrigerating systems and heat pumps — Part 1: Vessels — General requirements EN 14276-2:2007, Pressure equipment for refrigerating systems and heat pumps — Part 2: Piping — General requirements EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified)



EN 378-2:2008 (E) 8 EN 60335-1:2002, Household and similar electrical appliances — Safety — Part 1: General requirements (IEC 60335-1:2001, modified) EN 60335-2-24:2003, Household and similar electrical appliances — Part 2-24: Particular requirements for
refrigerating appliances, ice-cream appliances and ice-makers (IEC 60335-2-24:2002) EN 60335-2-34:2002, Household and similar electrical appliances — Safety — Part 2-34: Particular
requirements for motor-compressors (IEC 60335-2-34:2002) EN 60335-2-40:2003, Household and similar electrical appliances — Safety — Part 2-40: Particular requirements for electrical heatpumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2002, modified) EN 60335-2-89:2002, Household and similar electrical appliances — Safety — Part 2-89: Particular
requirements for commercial refrigerating appliances with an incorporated or remote refrigerant condensing unit or compressor (IEC 60335-2-89:2002) EN 61000-6-1:2007, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for
residential, commercial and light-industrial environments (IEC 61000-6-1:2005) EN 61000-6-2:2005, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments (IEC 61000-6-2:2005) EN 61000-6-3:2007, Electromagnetic compatibility (EMC) — Part 6-3: Generic standards — Emission
standard for residential, commercial and light-industrial environments (IEC 61000-3-3:2006) EN 61000-6-4:2007, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission
standard for industrial environments (IEC 61000-6-4:2006) EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994) EN ISO 3746:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995) EN ISO 4126-1:2004, Safety devices for protection against excessive pressure — Part 1: Safety valves (ISO 4126-1:2003) EN ISO 4126-2:2003, Safety devices for protection against excessive pressure — Part 2: Bursting disc safety devices (ISO 4126-2:2003) EN ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996) EN ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Survey method in situ (ISO 11202:1995) EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and equipment — Part 1: Planning (ISO TR 11688-1:1995) EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles (ISO 12100-2:2003) EN ISO 13732-1:2006, Ergonomics of the thermal environment —- Methods for the assessment of human responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)



EN 378-2:2008 (E) 9 EN ISO 13849-1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO/DIS 13849-1:2006) EN ISO 13850:2006, Safety of machinery — Emergency stop — Principles for design (ISO 13850:2006) ISO 817:2005, Refrigerants —Designation system ASTM D 4728:2006, Standard Test Method for Random Vibration Testing of Shipping Containers 3 Terms, definitions, designations, classification and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 378-1:2008 apply. 3.2 Designations and classification Designation and classification of the refrigerant such as:  refrigerant number, e.g. R 717 and  safety groups A1, A2, A3, B1, B2, B3 are specified in EN 378-1:2008, Annex E. 3.3 Abbreviations DN Nominal size (see EN 378-1:2008, 3.5.17) PS Maximum allowable pressure in bar (1 bar = 0,1 MPa) (see EN 378-1:2008, 3.3.2) LFL Lower flammability limit in kg/m3
4 Significant hazards The list of significant hazards related to the Machinery Directive is given in Annex D. 5 Safety requirements and/or measures 5.1 General safety and/or environmental requirements 5.1.1 General Safety and environmental requirements are specified in 5.2 and Clause 6. Refrigerating appliances complying with the product standards such as  EN 60335-2-40 for electrical heat pumps, air-conditioners and dehumidifiers,  EN 60335-2-24 for refrigerating appliances, ice-cream appliances and ice-makers and  EN 60335-2-89 for commercial refrigerating appliances with an incorporated or remote refrigerant con-densing unit or compressor



EN 378-2:2008 (E) 10 are in compliance with this European Standard up to and including category I as determined in Annex B. For refrigerating appliances of category II and higher, as determined in Annex B, the relevant requirements for pressure safety in 5.2 and Clause 6 apply. 5.1.2 Hazards to persons, property and environment Refrigerating systems and components shall be designed and constructed with the intention to eliminate
possible hazards to persons, property and the environment. Deliberate discharge of refrigerants shall only be permitted in a manner which is not harmful to persons, property and the environment and in accordance with national laws. 5.2 Safety requirements for components and piping 5.2.1 General requirements Components and piping shall comply with the related standards or requirements as indicated in Table 1. Requirements for components not included in Table 1 and which are below category II as defined in B.5 are indicated in 5.3. Where the product standards for components or piping are not harmonised for the EC provisions in relation to pressure or if the essential requirements of such provisions are not covered then, if relevant, compliance of such components or piping shall be proved and by risk assessment assure that the relevant requirements for pressure are met. If the relevant standards for those components listed in Table 1 does not cover requirements for electrical safety, than the electrical parts/ systems of these components shall fulfil the requirements for electrical safety as defined in EN 60335-2-40, EN 60335-2-24, EN 60335-2-89 or EN 60204-1 as relevant.



EN 378-2:2008 (E) 11 Table 1 — Components and piping requirements COMPONENT RELATED STANDARD AND REQUIREMENTS Heat exchangers: — pipe coil without air (tube in tube) — multi-tubular (shell and tubes) EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Plate heat exchangers EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Headers and coils with air as secondary fluid EN 14276-2 combined with 5.2.2.2 of this standard Receiver/accumulator/economiser EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Oil separator EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Drier EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Filter EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Muffler EN 14276-1 or EN 13445 if applicable combined with 5.2.2 of this standard Hermetic positive displacement compressor EN 60335-2-34 or prEN 12693 Semi hermetic positive displacement compressor
EN 60335-2-34 or prEN 12693 Open positive displacement compressor prEN 12693 Non positive displacement compressor EN 14276-1 or EN 13445 if applicable combined with EN 60204-1 Pump
General requirements
Additional requirements for pumps in refrigerating systems and heat pumps with R717
EN 809 combined with EN 60204-1, and combined with 5.2.2.2 and 5.2.2.5 of this standard Annex A Piping EN 14276-2 or EN 13480 piping joints permanent joints detachable joints
EN 14276-2 5.2.2.2 and 5.2.2.3 of this standard Flexible piping EN 1736 Valves EN 12284 safety valve EN 13136 and EN ISO 4126-1 combined with 5.2.2 of this standard safety switching devices for limiting the pressure EN 12263 combined with 5.2.2.2 of this standard isolating valves EN 12284 hand operated valves EN 12284 valves with seal cap EN 12284 Bursting disc EN ISO 4126-2 and EN 13136 combined with 5.2.2.2 of this standard Fusible plug EN 13136 combined with 5.2.2.2 and 5.2.2.4 of this standard Liquid level indicators EN 12178 combined with 5.2.2.2 of this standard Gauges EN 837-1, EN 837-2 and EN 837-3 combined with 5.2.2.2 of this standard Brazing and soldering materials 5.3.1.3 e), f) of this standard Welding materials EN 14276-2 If the component contains electrical components, and if the component standard does not cover electrical safety, then the component shall fulfil the electrical requirements of EN 60335-2-40, EN 60335-2-24, EN 60335-2-89 or EN 60204-1 as relevant.



EN 378-2:2008 (E) 12 NOTE Components that are declared to comply with the relevant directives using a method alternative to the above
standards also comply with the requirements of this standard. 5.2.2 Specific requirements 5.2.2.1 General In addition to the requirements of 5.2.1, following requirements are applicable for incorporation of specific components and piping into the refrigerating system. 5.2.2.2 Tightness If no test procedure is specified in the component standard, the tightness shall be assured by testing using a test method appropriate for the component and refrigerant, for details see 6.3.4. When required, some or all tests may be executed on the assembly (refer to 6.3). Tightness tests shall be conducted only after the component has passed a strength pressure test or has been verified by a type test. NOTE For guidance refer also to EN 1779:1999. 5.2.2.3 Piping joints Joints shall be designed so that they will not be damaged due to the freezing of water on the outside. They shall be suitable for the pipe, the piping material and the pressure, temperature and fluid. Coated (e.g. galvanized) pipes shall not be welded, unless all coating has been completely removed from the joint area. Welded joints shall be suitably protected. 5.2.2.4 Fusible plugs The nominal melting temperature and work pressure of the fusible material shall be stamped on the non-fusible portion of the plug. 5.2.2.5 Refrigerant liquid pumps Refrigerant liquid pumps shall be provided with the following information as a minimum, which shall be durable and permanently affixed: a) manufacturer; b) type designation; c) serial number; d) year of manufacture; e) design pressure or maximum allowable pressure (PS).



EN 378-2:2008 (E) 13 5.3 Miscellaneous components 5.3.1 Materials 5.3.1.1 General The material of the component shall be suitable for the intended temperature and pressure range and in combination with refrigerating systems and heat pumps as specified by the manufacturer of the
refrigerant systems and heat pumps.
The relevant standards have to be considered. Restrictions for use of dangerous or hazardous substances and preparations shall be taken into account. NOTE For example as required in 76/769/EC ("dangerous substances") and 2002/95/EC (RoHS). 5.3.1.2 Ferrous materials The material of the component shall be suitable for the specified temperature and pressure range and
combination with the refrigerants applicable for that part. a) Cast iron and malleable iron Cast iron and malleable iron shall only be used, when suitable for the particular application in accordance with the requirements of this standard. NOTE 1 Since some grades of cast iron are brittle, their application is dependent on temperature/stress/design
considerations. NOTE 2 Malleable iron has two general classifications with several different grades in each. These can have very different mechanical properties. b) Steel, cast steel, carbon steel and low alloy steel Steel, cast steel, carbon steel and low alloy steel may be used for all parts carrying refrigerant and also for heat transfer medium circuits. Where there is a combination of low temperatures and high pressure and/or where corrosion risks and/or thermal stresses are present, steel with adequate impact strength shall be used paying regard to thickness, the lowest operating temperature and its welding properties. c) High alloy steel High alloy steel may be required where there is a combination of low temperatures and high pressure and/or where corrosion risks and/or thermal stresses are present. The impact strength shall be adequate for the
particular duty and the material suitable for welding, if required. d) Stainless steel When using stainless steel, care shall be taken to ensure that the grade of stainless steel is compatible with the process fluids and possible atmospheric impurities, e.g. sodium chloride (NaCl), sulphuric acid (H2SO4). 5.3.1.3 Non-ferrous materials and their alloys (cast, forged, rolled and drawn) The material of the component shall be suitable for the specified temperature and pressure range and combination with the refrigerants applicable for that part. a) Copper and copper alloys Copper in contact with refrigerants shall be oxygen-free or de-oxidized (refer to EN 12735-1 and EN 12735-2). Copper and alloys with a high percentage of copper shall not be used for parts carrying R717 unless their compatibility has been proved by test or experience.



EN 378-2:2008 (E) 14 b) Aluminium and aluminium alloys Aluminium used for gaskets for use with R717 shall be of at least 99,5 % purity. Aluminium alloys containing more than 2 % magnesium shall not be used with halogenated refrigerants unless their compatibility has been proved by test or experience. Aluminium and its alloys shall not be used in contact with R40 (CH3Cl). NOTE 1 Aluminium and aluminium alloys may be used in any part of the refrigerant circuit provided that its strength is adequate and it is
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