SIST EN 12977-1:2012
(Main)Thermal solar systems and components - Custom built systems - Part 1: General requirements for solar water heaters and combisystems
Thermal solar systems and components - Custom built systems - Part 1: General requirements for solar water heaters and combisystems
This European Standard specifies requirements on durability, reliability and safety of small and large custom built solar heating and cooling systems with liquid heat transfer medium in the collector loop for residential buildings and similar applications.
This document contains also requirements on the design process of large custom built systems.
Thermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 1: Allgemeine Anforderungen an Solaranlagen zur Trinkwassererwärmung und solare Kombianlagen
Diese Europäische Norm legt Anforderungen an die Dauerhaftigkeit, Zuverlässigkeit und Sicherheit von kleinen
und großen kundenspezifisch gefertigten thermischen Solaranlagen für Heizung und Kühlung mit einem
flüssigen Wärmeträgermedium im Kollektorkreis fest, die für den Einsatz in Wohngebäuden und Gebäuden
ähnlicher Nutzung vorgesehen sind.
Dieses Dokument enthält darüber hinaus Anforderungen an den Entwurf großer kundenspezifisch gefertigter
Anlagen.
Installations solaires thermiques et leurs composants - Installations assemblées à façon - Partie 1: Exigences générales pour chauffe-eau solaires et installations solaires combinées
La présente Norme européenne spécifie les exigences de durabilité, de fiabilité et de sécurité des petites et
grandes installations de chauffage et de refroidissement solaires assemblées à façon, à liquide caloporteur
dans la boucle de captage, destinées aux bâtiments résidentiels et applications similaires.
Le présent document contient également des exigences relatives au processus de conception des grandes
installations assemblées à façon.
Toplotni sončni sistemi in sestavni deli - Neserijsko izdelani sistemi - 1. del: Splošne zahteve za solarne grelnike in kombinirane sisteme
Ta evropski standard določa zahteve za trajnost, zanesljivost in varnost majhnih in velikih neserijsko izdelanih sončnih ogrevalnih in hladilnih sistemov s tekočim sredstvom za prenos toplote v zanki kolektorja za stanovanjske zgradbe in podobne uporabe. Dokument vsebuje tudi zahteve v zvezi s procesom načrtovanja velikih neserijsko izdelanih sistemov.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Thermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 1: Allgemeine Anforderungen an Solaranlagen zur Trinkwassererwärmung und solare KombianlagenFRPELQpHVThermal solar systems and components - Custom built systems - Part 1: General requirements for solar water heaters and combisystems91.140.65Oprema za ogrevanje vodeWater heating equipment91.140.10Sistemi centralnega ogrevanjaCentral heating systems27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 12977-1:2012SIST EN 12977-1:2012en,fr,de01-julij-2012SIST EN 12977-1:2012SLOVENSKI
STANDARDSIST-TS CEN/TS 12977-1:20101DGRPHãþD
SIST EN 12977-1:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12977-1
April 2012 ICS 27.160 Supersedes CEN/TS 12977-1:2010English Version
Thermal solar systems and components - Custom built systems - Part 1: General requirements for solar water heaters and combisystems
Installations solaires thermiques et leurs composants - Installations assemblées à façon - Partie 1: Exigences générales pour chauffe-eau solaires et installations solaires combinées
Thermische Solaranlagen und ihre Bauteile - Kundenspezifisch gefertigte Anlagen - Teil 1: Allgemeine Anforderungen an Solaranlagen zur Trinkwassererwärmung und solare Kombianlagen This European Standard was approved by CEN on 19 February 2012.
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, 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 © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12977-1:2012: ESIST EN 12977-1:2012
EN 12977-1:2012 (E) 2 Contents Page Foreword .4Introduction .51 Scope .72 Normative references .73 Terms and definitions .84 Symbols and abbreviations . 105 System classification . 105.1 Small custom built systems . 105.2 Large custom built systems . 106 Requirements . 116.1 Introduction . 116.2 General . 116.2.1 Suitability for drinking water . 116.2.2 Water contamination . 116.2.3 Freeze resistance . 116.2.4 High-temperature protection . 116.2.5 Reverse circulation prevention . 126.2.6 Pressure resistance . 126.2.7 Electrical safety. 126.3 Materials . 126.4 Components and pipework . 136.4.1 Collector and collector array . 136.4.2 Supporting frame . 136.4.3 Collector and other loops . 136.4.4 Circulation pumps . 136.4.5 Expansion vessels . 136.4.6 Heat exchangers . 146.4.7 Water store(s) . 146.4.8 Pipework . 156.4.9 Thermal insulation . 156.4.10 Control equipment . 156.5 Safety equipment and indicators . 166.5.1 Safety valves . 166.5.2 Safety lines and expansion lines . 166.5.3 Blow-off lines . 166.5.4 Store isolation valve . 166.5.5 Indicators . 166.6 Installation . 176.6.1 Roof tightness . 176.6.2 Lightning . 176.6.3 Snow and wind loads . 176.7 Initial operation and commissioning . 176.8 Documentation . 176.8.1 General . 176.8.2 Assortment file for small systems . 186.8.3 Documentation for small systems . 186.8.4 Documentation for large systems . 186.9 System performance . 19SIST EN 12977-1:2012
EN 12977-1:2012 (E) 3 6.10 Water wastage . 19Bibliography . 20 Tables Table 1 — Division for factory made and custom built solar heating systems . 6Table 2 — Classes of small custom built systems according to their purpose . 10Table 3 — Classification of large systems . 11 SIST EN 12977-1:2012
EN 12977-1:2012 (E) 4 Foreword This document (EN 12977-1:2012) 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 October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. CEN [and/or] CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN/TS 12977-1:2010. 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, 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 12977-1:2012
EN 12977-1:2012 (E) 5 Introduction a) Drinking water quality In respect of potential adverse effects on the quality of drinking water intended for human consumption caused by the product covered by this document, it should be noted that 1) this document provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA, 2) while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. b) Factory made and custom built solar heating systems EN 12976-1, EN 12976-2, EN 12977-1, EN 12977-2, EN 12977-3, EN 12977-4 and EN 12977-5 distinguish two categories of solar heating systems: 1) factory made solar heating systems; and 2) 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. 1) 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. Requirements and test methods for factory made solar heating systems are given in EN 12976-1 and EN 12976-2. 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 EN 12977-1, test methods are specified in EN 12977-1, EN 12977-2, EN 12977-3, EN 12977-4 and EN 12977-5. Custom built solar heating systems are subdivided into two categories: i) large custom built systems are uniquely designed for a specific situation. In general, they are designed by HVAC engineers, manufacturers or other experts; ii) 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. Table 1 shows the division for different system types. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 6 Table 1 — Division for factory made and custom built solar heating systems Factory made solar heating systems (EN 12976-1 and EN 12976-2) Custom built solar heating systems (EN 12977-1, EN 12977-2, EN 12977-3, EN 12977-4 and EN 12977-5) Integral collector-storage systems for domestic hot water preparation Forced circulation systems for hot water preparation and/or space heating/cooling, assembled using components and configurations described in a documentation file (mostly small systems) Thermosiphon systems for domestic hot water preparation 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/cooling (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 for domestic hot water preparation are performance tested under the same set of basic reference conditions as specified in EN 12976-2:2006, Annex B and in EN 12977-2:2012, Annex A. In practice, the installation conditions may differ from these reference conditions. NOTE 3 Solar heating systems for both heating and cooling can so far not be performance tested; if the cooling option is not considered then the solar heating can be performance tested as a space heating system. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 7 1 Scope This European Standard specifies requirements on durability, reliability and safety of small and large custom built solar heating and cooling systems with liquid heat transfer medium in the collector loop for residential buildings and similar applications. This document also contains requirements on the design process of large custom built systems. 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. EN 253, District heating pipes — Preinsulated bonded pipe systems for directly buried hot water networks — Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene EN 307, Heat exchangers — Guidelines to prepare installation, operating and maintenance instructions required to maintain the performance of each type of heat exchangers EN 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1: General EN 806-2, Specification for installations inside buildings conveying water for human consumption — Part 2: Design EN 809, Pumps and pump units for liquids — Common safety requirements EN 1151-1, Pumps — Rotodynamic pumps — Circulation pumps having a rated power input not exceeding 200 W for heating installations and domestic hot water installations — Part 1: Non-automatic circulation pumps, 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 EN 1999-1-1, Eurocode 9: Design of aluminium structures — Part 1-1: General structural rules EN 12828, Heating systems in buildings — Design for water-based heating systems EN 12975-1:2006, Thermal solar systems and components — Solar collectors — Part 1: General Requirements EN 12975-2, Thermal solar systems and components — Solar collectors — Part 2: Test methods EN 12976-1:2006, Thermal solar systems and components — Factory made systems — Part 1: General requirements SIST EN 12977-1:2012
EN 12977-1:2012 (E) 8 EN 12977-2:2012, Thermal solar systems and components — Custom built systems — Part 2: Test methods for solar water heaters and combisystems EN 12977-3, Thermal solar systems and components — Custom built systems — Part 3: Performance test methods for solar water heater stores EN 12977-4, Thermal solar systems and components — Custom built systems — Part 4: Performance test methods for solar combistores EN 12977-5, Thermal solar systems and components — Custom built systems — Part 5: Performance test methods for control equipment EN 60335-1, Household and similar electrical appliances — Safety — Part 1: General requirements (IEC 60335-1, modified) EN 60335-2-21, Household and similar electrical appliances — Safety — Part 2-21: Particular requirements for storage water heaters (IEC 60335-2-21) EN 62305-1, Protection against lightning — Part 1: General principles (IEC 62305-1) EN ISO 9488:1999, Solar energy — Vocabulary (ISO 9488:1999) ISO 9459-1:1993, Solar heating — Domestic water heating systems — Part 1: Performance rating procedure using indoor test methods 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 document, the terms and definitions given in EN 12975-1:2006, EN 12976-1:2006 and EN ISO 9488:1999 and the following apply. 3.1 assortment complete list of components (collectors, stores, controllers, pumps, etc.) which a company offers for its solar heating systems Note 1 to entry: For the purpose of this document, the assortment is restricted to components used for small custom built solar heating systems marketed by a company. 3.2 assortment file technical documentation file for small custom built systems of a company, which includes: the complete assortment for small custom built systems; the complete description of all system configurations; the complete description of all marketed combinations of system configurations and components including the component dimensions and number of units; further technical information 3.3 blow-off line connecting line between the outlet of the safety valve and the environment (preferably an open vessel at atmospheric pressure) SIST EN 12977-1:2012
EN 12977-1:2012 (E) 9 3.4 collector array group of collectors that are closely connected in series, in parallel or in combination of both modes, with one hydraulic input and one hydraulic output 3.5 control equipment controllers, sensors, pumps, actuators, etc. used for controlling a solar heating system; this system includes optional auxiliary heaters and other parts of the space heating system, for heat generation and distribution Note 1 to entry: Requirements and test methods for control equipment are given in EN 12977-5. 3.6 expansion line connecting line between the collectors and the pressure expansion vessel connecting line between the collector array and the open expansion vessel 3.7 flow rate circulation rate 3.8 large custom built system solar heating system for the purpose of hot water preparation and/or space heating/cooling, which is designed for a specific situation by combining various components to a unique system Note 1 to entry: In general, the collector area is greater than 30 m² and the store volume is greater than 3 m³. 3.9 safety line connecting line between the collector array and the safety valve connecting line between the collector array and the open expansion vessel 3.10 safety valve temperature and/or pressure limiting valve 3.11 small custom built system modular solar heating system of the remote storage type for the purpose of hot water preparation and/or space heating and/or cooling Note 1 to entry: The system has a well-identified configuration (see 3.13). It is assembled from components chosen from the market and described in an assortment file prepared by a company. Note 2 to entry: In general, the assortment file includes the possible system configurations, the assortment of components and their possible combinations and dimensions. The "company" may be the manufacturer of all or of parts of the components in the assortment; this company may also be only a consulting engineer who just produces the technical documentation and purchases the components from suppliers. Note 3 to entry: In general, the collector area is greater than 1 m2 and less than 30 m2 and the store volume is less than 3 m³. Note 4 to entry: The system can be tested by experimentally testing the components and predicting the system performance for different combinations of components by computer simulation. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 10 3.12 solar combisystem solar heating system providing both hot water and space heating 3.13 system configuration characteristics of a solar heating system including its hydraulic scheme (hydraulic connections between the collector array, the store(s) and other components) and its control concept
Note 1 to entry: Systems differing by any other parameter, by the type or dimensions of the used components or the controller settings are considered to have the same configuration. 3.14 water wastage amount of water not warm enough to count in the tapping (unheated water standing in pipes and fittings which are integrated into the water tank at the hot side of the draw-off piping) 4 Symbols and abbreviations (UA) sb,s,a stand-by heat loss capacity rate of the store, in Watts per Kelvin; Vn nominal volume of the store, in litres 5 System classification 5.1 Small custom built systems Small custom built systems are classified as described in ISO 9459-1:1993, Clause 5. According to the purpose of these systems, the additional classification in Table 2 applies. Table 2 — Classes of small custom built systems according to their purpose Class Purpose A domestic hot water preparation only B space heating only C domestic hot water preparation and space heating D others (e.g. including cooling, swimming pool heating)
5.2 Large custom built systems Large custom built systems are classified in accordance with Table 3. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 11 Table 3 — Classification of large systems Class Purpose A A system in which the store(s) and the collector array(s) are located in one building for which the heat/cool is provided. No seasonal store and no heat/cool distribution network outside the building are included. B A system which consists of a central heating/cooling plant and one or more collector array(s). The heat/cool is transported via a heat/cool distribution network to the heating plant and/or to other buildings. No seasonal store is included. C A large custom built system which mainly consists of one or more large collector array(s) and in which the heat/cool is transferred to a seasonal store or directly into a heat/cool distribution network. D Others
6 Requirements 6.1 Introduction Subsequent requirements refer to the test methods given in EN 12977-2 and EN 12977-5. NOTE Regarding large systems, the wording "no requirements on … however it is recommended that …” does not imply the need for a test method in EN 12977-2. 6.2 General 6.2.1 Suitability for drinking water See EN 806-1 and EN 806-2. 6.2.2 Water contamination The system has to be designed to avoid water contamination from backflow from all circuits to cold supply. 6.2.3 Freeze resistance See EN 12976-1. 6.2.4 High-temperature protection 6.2.4.1 Scald protection Systems in which the temperature of the domestic hot water delivered to the user can exceed 60 °C, shall be fitted with an automatic cold water mixing device or any other device to limit the temperature to a maximum of 60 °C shall be installed. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 12 6.2.4.2 High-temperature protection for materials The design of the system shall ensure that the highest permissible temperatures to which the system components may be exposed are not exceeded, also taking into account pressure conditions if relevant. Maximum temperature in the collector is the collector stagnation temperature according to the EN 12975-2 test report. NOTE 1 Care should be taken in cases where under stagnation conditions steam or hot water can enter the collector pipes, pipework, distribution network or heat exchanger (see [4]). NOTE 2 Maximum temperature in the rest of the collector loop depends on safety valve pressure setting and the actual fluid. NOTE 3 Guidelines for the determination of the highest temperature – depending on safety valve and fluid – should be provided. 6.2.5 Reverse circulation prevention The installation of the system as described in the hydraulic scheme shall ensure that no unintentional reverse flow occurs in any hydraulic loop of the system. 6.2.6 Pressure resistance The storage tank and heat exchangers shall withstand at least 1,5 times the manufacturer's stated maximum individual working pressures. The drinking water circuit shall withstand the maximum pressure required by national/European drinking water regulations for open-vented or closed drinking water installations. The system shall have been designed in such a way that the maximum allowed pressure of any material in the system is never exceeded, taking into account temperature conditions if relevant. Every closed circuit in the system shall contain a safety valve. This safety valve shall withstand the highest temperature that can be reached at its location. It shall conform to EN 1489. If thermostatic valves are used, these shall conform to EN 1490. NOTE 1 In addition, collector arrays of large custom built systems should be designed in a way so that they can also withstand high-pressure peaks of short duration, e.g. arising from sudden evaporation of liquid within the collectors at the beginning of stagnation.
NOTE 2 If, due to stagnation, considerable heat transfer medium quantities in the collector array evaporate, pressure peaks may occur due to high flow velocities of steam or liquid. These pressure peaks may significantly exceed the release pressure of the safety valve. 6.2.7 Electrical safety See EN 60335-1 and EN 60335-2-21. There shall be means to interrupt manually the power supply to the pump(s). 6.3 Materials It shall be stated in the documentation for the installers that materials exposed to weathering shall be resistant to rodents, birds, UV radiation and other weather conditions over a prescribed lifetime. All materials used in the collector loop should comply with ISO/TR 10217 in order to avoid any internal corrosion. SIST EN 12977-1:2012
EN 12977-1:2012 (E) 13 6.4 Components and pipework 6.4.1 Collector and collector array The collector shall meet the requirements given in EN 12975-1. For parts and joints of the collector array, see 6.4.8. NOTE 1 Care should be taken in order to ensure long-term durability and tightness of the collector joints. If the collector array includes several parallel connected rows of collectors, the maximum divergent of the mass flow rate per unit collect
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