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This European Standard applies to equipment which controls scheduling heating systems. The signals can be processed by using either analogue or digital techniques, or both. The particular equipment to which this document applies covers both: • stand-alone fixed start-stop schedulers; • controllers which contain fixed start-stop scheduling function. It applies to basic and added start-stop control functions and sets minimum acceptable standards for functions, performance and documentation. NOTE The start-stop function can be integrated within a main control device. In this case the controller would be expected to this standard for scheduling function. Safety requirements on heating systems and heating control systems remain unaffected by this European Standard. The actuators and the dynamic behaviour of the valves are not covered in this European Standard. This control equipment may or may not be connected to a data network.