BS EN 12977-1:2018 pdf download

BS EN 12977-1:2018 pdf download.Thermal solar systems and components – Custom built systems
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 European Standard 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一Preinsulated bonded pipe systems for directly buried hot water networks一Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing ofpolyethylene
EN 30Z, Heat exchangers一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一Part 1: General
EN 806 2, Specification for installations inside buildings conveying water for human consumption一Part 2: Design
EN 809, Pumps and pump units for liquids一Common safety requirements
EN 16297-1, Pumps一Rotodynamic pumps一Glandless circulators一Part 1: General requirements and procedures for testing and calculation of energy efficiency index (EEI)
EN 1489, Building valves一- Pressure safety valves一Tests and requirements
EN 1490 Building valves一Combined temperature and pressure relief valves一Tests and requirements
EN 1991-1-3, Eurocode 1 – Actions on structures一Part 1-3: General actions – – Snow loads
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.
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 ISO 9806:2017 test report. 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(s) (see [4]). NOTE Maximum temperature in the rest of the collector loop depends on safety valve pressure setting and the actual fluid. Guidelines for the determination of the highest temperature – depending on safety valve and fluid – should be provided.