BS EN 12098-5-2005

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12098-5September 2005ICS 91.140.10; 97.120English VersionControls for heating systems - Part 5: Start-stop schedulers forheating systemsRégulation pour les systèmes de chauffage - Partie 5:Programmateurs d intermittences pour les systèmes dechauffageMess-, Steuer- und Regeleinrichtungen für Heizungen - Teil5: Schalteinrichtungen zur programmierten Ein- undAusschaltung von HeizungsanlagenThis European Standard was approved by CEN on 1 August 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, 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© 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12098-5:2005: EDocumento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 2 Contents Page Foreword 3 Introduction4 1 Scope .5 2 Normative references .5 3 Terms and definitions.5 4 Functionality7 5 Graphical symbols and abbreviations.11 6 Requirements 11 7 Test methods.18 8 Marking 19 9 Documentation20 Bibliography.24 Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 3 Foreword This European Standard (EN 12098-5:2005) has been prepared by CEN/TC 247 “Building automation control and building management“, the secretariat of which is held by SNV. 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 March 2006, and conflicting national standards shall be withdrawn at the latest by March 2006. This European Standard is one of a series of product standards for “Controls for heating systems”. It considers Definitions, Functionality, Requirements, Test methods, and Documentation for heating controls with fixed start-stop functions. This European Standard consists of the following parts: Part 1: Outside temperature compensated control equipment for hot water heating systems; Part 2: Optimum start-stop control equipment for hot water heating systems; Part 3: Outside temperature compensated control equipment for electrical heating systems; Part 4: Tariff compensated optimum start-stop control equipment for electrical systems; Part 5: Start-stop schedulers for heating systems. No existing European Standard is superseded. The position of this European Standardt in the series of standards for mechanical building services is illustrated below: Mechanical building services Heating systems Control for mechanical building services Ventilation and air conditioning systems Controls for heating systems Individual zone control for HVAC applications Building management products and systems for HVACapplications System neutral data transmission for HVAC applications Outside temperature compensated control equipment for hot water heating systems Optimum start-stop control equipment for hot water heating systems Outside temperature compensated control equipment for electrical heating systems Optimum start-stop control equipment for electrical heating systems Start-stop schedulers for heating systems Definitions Functionality Requirements Test methods DocumentationMarking HVAC = Heating, Ventilation, Air Conditioning. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 4 Introduction Equipment which controls scheduling of the heating supply in buildings is necessary to reduce the energy consumption of heating plants and maintain comfort level, either for water or electrical heating systems. Clock schedulers lead to energy saving by switching heating modes in relation with predictable occupancy. Timers and schedulers derogation functions start-stop heating modes for non periodic needs of heating. Switch times may have to be manually changed to achieve energy savings and acceptable comfort levels. NOTE 1 Fixed start-stop basic function is illustrated by Figure 1. In this example, mode I is nominal mode, J is stand-by mode. Switch1416182004812 242016 44812 2016 2400TimeScheduledswitchingoperationsModeRoomtemperature8Hour of day°CProgrammmodeSwitch Switch SwitchMode l Mode Jmode mode modeMode JMode lFigure 1 - Relation between occupation, heating modes and room temperature, example Included in this European Standard are the main equipment characteristics reaching these energy saving and comfort objectives. NOTE 2 This European Standard, therefore, conforms to the requirements and objectives of the interpretative document n° 6 “Energy Economy and Heat Retention” relating to the Construction Product Directive (89/106/EEC). Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 5 1 Scope 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. 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 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529: 1989) EN 60730-1, Automatic electrical controls for household and similar use – Part 1: General requirements (IEC 60730-1:1999, modified) EN 60730-2-7, Automatic electrical controls for household and similar use – Part 2: Particular requirements for timers and time switches (IEC 60730-2-7:1990, modified) IEC 60038, IEC standard voltages 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 start-stop scheduler device which switches heating modes affecting the heating control system (see Figure 2) according to a program Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 6 Key 1 Tariff 2 Derogation possibility 3 Start-stop scheduler according to ENV 12098-5 4 Switch code I, J, K… 5 Room temperature controller 6 Temperature sensor 7 Actuating equipment 8 Heat generation and distribution Figure 2 - Example of heating control system. Scheduler and controller are either separated stand alone devices or both integrated on a device 3.2 start-stop timer start-stop scheduler switching heating modes for a single programmed period, started by an user 3.3 switch times points in time at which the scheduler switches from a mode to another one 3.4 mode state of a device or system defining the manner by which it performs its functions. A heating system or a heating controller should have many heating modes (or heating operation modes), e.g. nominal, reduced, on, off, start, stand-by. It should be noted that other modes can also exists NOTE Heating stand-by mode: in this mode, heating system is switched off and, if it applies, enable frost protection function. It’s important to make a difference between the heating stand-by mode and a so-called device stand-by mode for mains powered equipment and house hold appliances. It concerns devices itself for non-operational, lowest power consumption mode which cannot be switched off (influenced) by the user and that may persist for an indefinite time. 3.5 output signal signal generated by the scheduler to the control system for switch heating mode. It can affect the controller or the actuating equipment or modify the room temperature controller set point 3.6 program memorised switch times, reproducing periods or periodic cycles, daily, weekly or yearly. Program may include periods for derogation, start period or tariff compensation functions 3.7 type of daily program daily program able to be reproduced for many days of the week or the year Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 7 3.8 derogation temporary override of the program by an user 3.9 start period operating period between switch-on heating time and the beginning of nominal occupation period during which heating rises room temperature NOTE A start-stop optimiser conforming to EN 12098-2 controls the switch-on heating time modifying the start period in relation with measured variables. On a scheduler, start period set is a constant parameter, the switch-on time being fixed by start period and beginning of nominal occupation period user settings. Key I, J, K: modes e.g.: 1 nominal 2 : reduced 3 stand-by A: switch time to mode I A(o): beginning of occupation period B: switch time to mode J (or K) X: room temperature A-B: Period for mode I A(o) – B: nominal occupation period for mode I A - A(o): start period (heating up) Y: Time Figure 3 - Example of temperature-time curve obtained by a mode scheduled controller 3.10 tariff compensation unction anticipating the switch time, related to the programmed switch time and tariff rising time I. This function make benefits, according to cost reflective message from electric utility. 3.11 manual operation during manual operation the mode of the scheduler is directly changed by the operator 3.12 clock retention time duration which allows to recover the actual time after a power failure 4 Functionality Start-stop scheduling equipment achieves energy saving by reducing, or preferably, switching off heating systems. Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 8 In this document, a scheduler is able to control at least two heating modes. These modes are defined by the manufacturer. The output signal is binary, or more. Functionalities and requirements fall into six categories. Table 1 shows those possibilities. Table 1 - Categories Categories Program Time setting resolution Switches times per day Type of day 0 Timer large -- -- 1 Daily large 2 1 2 Daily Low 4 1 3 Weekly large 2 2 4 Weekly Low 4 2 5 Yearly large 2 2 - Category 0: timer is a non periodic, memorised period, started manually or by external signal. - Categories 1 to 5: clock schedulers memorise a periodic, fixed or custom program. These 5 schedulers categories should include optional functions: - Program derogation started manually or by external signal by on user, temporarily overriding the program. - Start heating period separated setting. This period preceding the nominal occupation period allows the user to program the beginning of the nominal occupation period, this time being more easily programmed than switch-on heating. - Tariff energy compensation: function allowing energy cost saving when time related start period and tariff rising time permits cost saving. NOTE Some other functions can be added to start-stop schedulers, e.g.: - automatic modification for winter - summer clock time; - clock synchronisation with a precise reference or a master clock; - status information of the scheduler; - multiple derogation functions. Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 9 Key 1 Start 2 Timer period 3 Output signal for control heating system 4 TIMER scheduler cat. 0 5 Tariff signal 6 Derogation 7 Clock settings 8 Time scheduled parameters: switch times, start period, tariff compensated period 9 Operating mode settings 10 Output signal for control heating system 11 Clock scheduler cat. 1 to 5 Indicates optional parameters * Figure 4 - Block schematic of start-stop schedulers categories 0 and 1 to 5 Inputs Outputs Start Boolean . ST F Boolean Signal oParameters OS* Status Time period Real . TP Mode Boolean . OM *Optimal Documento contenuto nel prodotto UNIEDIL IMPIANTI edizione 2006.2E vietato l uso in rete del singolo documento e la sua riproduzione. E autorizzata la stampa per uso interno.EN 12098-5:2005 (E) 10 Name Type Description Unit INPUTS ST Boolean Start timer OUTPUTS F Boolean Heating operation mode OS Boolean Status Parameters TP Boolean Timer period S OM Boolean Operating mode Figure 5 - Category 0 start-stop timer Inputs Outputs Actual time Time. t Start Derogation Boolea