BS EN 12976-1-2006

Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSI g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58systems —Part 1: General requirementsThe European Standard EN 12976-1:2006 has the status of a British StandardICS 27.160Thermal solar systems and components — Factory made BRITISH STANDARDBS EN 12976-1:2006BS EN 12976-1:2006Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 February 2006© BSI 20 February 2006ISBN 0 580 47841 6Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Commentsenquiries on the interpretation, or proposals for change, and keep UK interests informed;— monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.National forewordThis British Standard is the official English language version of EN 12976-1:2006. It supersedes BS EN 12976-1:2001 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee RHE/25, Solar heating, which has the responsibility to:— aid enquirers to understand the text;— present to the responsible international/European committee any EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12976-1January 2006ICS 27.160 Supersedes EN 12976-1:2000 English VersionThermal solar systems and components - Factory madesystems - Part 1: General requirementsInstallation solaires thermiques et leur composants -Installations préfabriquées en usine - Partie 1 : ExigencegénéralesThermische Solaranlagen und ihre Bauteile - VorgefertigteAnlagen - Teil 1: Allgemeine AnforderungenThis European Standard was approved by CEN on 9 December 2005.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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© 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12976-1:2006: ELicensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIEN 12976-1:2006 (E) 2 Contents Page Foreword 3 Introduction4 1 Scope .6 2 Normative references .6 3 Terms and definitions.6 3.1 expansion line .6 3.2 safety line 7 3.3 blow-off line.7 3.4 factory-made solar system.7 4 Requirements 7 4.1 General 7 4.1.1 Suitability for drinking water7 4.1.2 Water contamination.7 4.1.3 Freeze resistance8 4.1.4 Overtemperature protection.8 4.1.5 Reverse flow protection .9 4.1.6 Pressure resistance9 4.1.7 Electrical safety9 4.2 Materials 9 4.3 Components and pipework 10 4.3.1 Collector 10 4.3.2 Supporting frame 10 4.3.3 Piping.10 4.3.4 Heat Exchangers.10 4.3.5 Control system10 4.4 Safety equipment 11 4.4.1 Safety valves .11 4.4.2 Safety lines and expansion lines .11 4.4.3 Blow-off lines 11 4.5 Resistance to external influences11 4.6 Documentation11 4.6.1 General 11 4.6.2 Documents for the installer12 4.6.3 Documents for the user13 4.7 Labeling .14 4.8 System performance.14 Annex A (informative) Conformity assessment 15 Bibliography.16 Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 3 Foreword This European Standard (EN 12976-1:2006) has been prepared by Technical Committee CEN/TC 312 “Thermal solar systems and components”, the secretariat of which is held by ELOT. 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 July 2006, and conflicting national standards shall be withdrawn at the latest by July 2006. This European Standard supersedes EN 12976-1:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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. Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 4 Introduction Drinking water quality In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: a) This standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. Factory Made and Custom Built solar heating systems The standards EN 12976-1 as well as EN 12976-2 and the prestandards ENV 12977-1 to ENV 12977-3 distinguish two categories of solar heating systems: Factory Made solar heating systems and Custom Built solar heating systems. The classification of a system as Factory Made or Custom Built is a choice of the final supplier, in accordance with the following definitions. Factory Made solar heating systems are batch products with one trade name, sold as complete and ready to install kits, with fixed configurations. Systems of this category are considered as a single product and assessed as a whole. If a Factory Made Solar Heating System is modified by changing its configuration or by changing one or more of its components, the modified system is considered as a new system for which a new test report is necessary. Requirements and test methods for Factory Made solar heating systems are given in EN 12976-1 and EN 12976-2. Custom Built solar heating systems are either uniquely built, or assembled by choosing from an assortment of components. Systems of this category are regarded as a set of components. The components are separately tested and test results are integrated to an assessment of the whole system. Requirements for Custom Built solar heating systems are given in ENV 12977-1; test methods are specified in ENV 12977-2 and ENV 12977-3. Custom Built solar heating systems are subdivided into two categories: - Large Custom Built systems are uniquely designed for a specific situation. In general HVAC engineers, manufacturers or other experts design them. - Small Custom Built systems offered by a company are described in a so-called assortment file, in which all components and possible system configurations, marketed by the company, are specified. Each possible combination of a system configuration with components from the assortment is considered as one Custom Built system. Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 5 Table 1 shows the division for different system types: Table 1 - Division for factory made and custom built solar heating systems Factory Made Solar Heating Systems (EN 12976-1, -2) Custom Built Solar Heating Systems (ENV 12977-1, -2, -3) Integral collector-storage systems for domestic hot water preparation Forced-circulation systems for hot water preparation and/or space heating, assembled using components Thermosiphon systems for domestic hot water preparation and configurations described in a documentation file (mostly small systems) Forced-circulation systems as batch product with fixed configuration for domestic hot water preparation Uniquely designed and assembled systems for hot water preparation and/or space heating (mostly large systems) NOTE 1 Forced circulation systems can be classified either as Factory Made or as Custom Built, depending on the market approach chosen by the final supplier. NOTE 2 Both Factory Made and Custom Built systems are performance tested under the same set of reference conditions as specified in Annex B of EN 12976-2:2006 and Annex A of ENV 12977-2:2001. In practice, the installation conditions may differ from these reference conditions. NOTE 3 A Factory Made system for domestic hot water preparation may have an option for space heating, however this option should not be used or considered during testing as a Factory Made system. Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 6 1 Scope This European Standard specifies requirements on durability, reliability and safety for Factory Made thermal solar heating systems. The standard also includes provisions for evaluation of conformity to these requirements. The requirements in this standard apply to Factory Made solar systems as products. The installation of these systems itself is not considered, but requirements are given for the documentation for the installer and the user which is delivered with the system (see also 4.6). 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1: General EN 809, Pumps and pump units for liquids — General safety requirements EN 1151, Pumps — Rotodynamic pumps — Circulation pumps having an electrical effect not exceeding 200 W for heating installations and domestic hot water installations — Requirements, testing, marking EN 1489, Building valves — Pressure safety valves — Tests and requirements EN 1490, Building valves — Combined temperature and pressure relief valves — Tests and requirements EN 1991-1-3, Eurocode 1: Actions on structures — Part 1-3: General actions - Snow loads EN 1991-1-4, Eurocode 1: Actions on structures — Part 1-4: General actions - Wind actions EN 1993-1-1, Eurocode 3: Design of steel structures — Part 1-1: General rules and rules for buildings prEN 1999-1-1, Eurocode 9: Design of Aluminium Structures - Part 1-1: General rules prEN 12975-1, Thermal solar systems and components — Solar collectors — Part 1: General requirements prEN 12975-2, Thermal solar systems and components — Solar collectors — Part 2: Test methods EN 12976-2:2006, Thermal solar systems and components — Factory made systems — Part 2: Test methods EN ISO 9488:1999, Solar energy — Vocabulary (ISO 9488:1999) ISO/TR 10217, Solar energy — Water heating systems — Guide to material selection with regard to internal corrosion 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN ISO 9488:1999 and the following apply. 3.1 expansion line for systems with closed expansion vessels, the connecting line between the collectors and the pressure expansion vessel Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 7 For systems with open expansion vessels, the connecting line between the collector array and the open expansion vessel. 3.2 safety line for systems with closed expansion vessels: the connecting line between the collector array and the safety valve For systems with open expansion vessels: the connecting line between the collector array and the open expansion vessel 3.3 blow-off line connecting line between the outlet of the safety valve and the environment 3.4 factory-made solar system packaged solar energy system for the purpose of hot water preparation only, either of the close-coupled or remote-store type. The system consists of either one integral component or of a uniform set and configuration of components. It is produced under conditions, which are presumed uniform, and offered for sale under the same trade name. NOTE 1 A single system can be tested as a whole in a test laboratory, leading to representative results for all systems with the same trade name, configuration, components and dimensions (see also the Introduction). NOTE 2 External auxiliary water heating devices that are placed in series with the Factory Made system are not considered to be part of the system. Cold water piping from the cold water grid to the system as well as piping from the system to an external auxiliary heater or to tapping points is not considered to be part of the system. Piping between components of the Factory Made system is considered to be part of the system. Any integrated heat exchanger or piping for space heating option (see Introduction, NOTE 3) is not considered to be part of the system. 4 Requirements 4.1 General The system shall fulfil general safety requirements, e.g. care shall be taken to avoid protruding sharp edges on the outside of the system. 4.1.1 Suitability for drinking water The system shall conform to EN 806-1 (see also Introduction). 4.1.2 Water contamination The system has to be designed to avoid water contamination for backflow from all circuits to drinking main supplies. Licensed copy:PONTYPRIDD COLLEGE, 16/09/2007, Uncontrolled Copy, © BSIwww.bzfxw.comEN 12976-1:2006 (E) 8 4.1.3 Freeze resistance 4.1.3.1 Gene