SIST EN 12098-3:2004
(Main)Controls for heating systems - Part 3: Outside temperature compensated control equipment for electrical heating systems
Controls for heating systems - Part 3: Outside temperature compensated control equipment for electrical heating systems
This work item applies to electronic control equipment for electrical heating systems. The signals can be processed by analogue or digital techniques. This control equipment controls and regulates the distribution and/or the generation of heat in relation to the outside temperature and/or other reference variables (e.g. room temperature, emitter temperature...) and time. Safety requirements on heating systems remain unaffected by this standard. The dynamic behaviour of the actuators is not covered here. The control equipment may or may not be connected to a data network.
Mess-, Steuer- und Regeleinrichtungen für Heizungen - Teil 3: Witterungsgeführte Regeleinrichtungen für Elektroheizungen
Diese Europäische Norm gilt für Regelfunktionen, die die Zufuhr von Elektroenergie in Abhängigkeit von der Außentemperatur und anderen Regelgrößen (z. B. Raumtemperatur, Heizkörpertemperatur) steuern und regeln.
Diese Norm behandelt keine Wärmestrahler.
Die Ein- und Ausgangssignale können sowohl in Analog- als auch in Digitaltechnik verarbeitet werden.
Régulation pour les systemes de chauffage - Partie 3: Equipements de régulation en fonction de la température extérieure pour les systemes de chauffage électrique
La présente norme s'applique a la fonction de commande et de régulation de l'énergie électrique en fonction de la température extérieure et d'autres variables de référence (par exemple : température ambiante, température d'émetteurs).
Cette norme ne traite pas des émetteurs de chaleur.
Les signaux d'entrée et de sortie peuvent etre traités par des techniques analogiques ou numériques.
Regulacijske naprave za grelne sisteme – 3. del: Naprave za regulacijo električnih grelnih sistemov v odvisnosti od zunanje temperature
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mess-, Steuer- und Regeleinrichtungen für Heizungen - Teil 3: Witterungsgeführte Regeleinrichtungen für ElektroheizungenRégulation pour les systemes de chauffage - Partie 3: Equipements de régulation en fonction de la température extérieure pour les systemes de chauffage électriqueControls for heating systems - Part 3: Outside temperature compensated control equipment for electrical heating systems97.120Avtomatske krmilne naprave za domAutomatic controls for household use91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 12098-3:2002SIST EN 12098-3:2004en01-februar-2004SIST EN 12098-3:2004SLOVENSKI
STANDARD
SIST EN 12098-3:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12098-3December 2002ICS 91.140.10; 97.120English versionControls for heating systems - Part 3: Outside temperaturecompensated control equipment for electrical heating systemsRégulation pour les systèmes de chauffage - Partie 3:Equipements de régulation en fonction de la températureextérieure pour les systèmes de chauffage électriqueMess-, Steuer- und Regeleinrichtungen für Heizungen - Teil3: Witterungsgeführte Regeleinrichtungen fürElektroheizungenThis European Standard was approved by CEN on 7 November 2002.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12098-3:2002 ESIST EN 12098-3:2004
EN 12098-3:2002 (E)2ContentspageForeword.4Introduction.51Scope.62Normative references.63Terms and definitions.73.1outside temperature compensated controller (OTC).73.2actuating equipment.73.3controlled variable.83.4output signals.83.5reference variables.83.6outside temperature.83.7outside temperature compensated control.83.8nominal room temperature.83.9reduced room temperature.83.10stand-by room temperature.83.11controller characteristic heating curve.83.12 switch-on.83.13 switch-off time.93.14 nominal operation.93.15 reduced operation.93.16 stand-by operation.93.17 manual operation.93.18 frost protection function.93.19 temperature-time curve.104Functionality.104.1Objective of control.104.2Control equipment functionality.114.3Functional block.115Graphical symbols.126Requirements.136.1Data protection.136.2Characteristic heating curve.136.3Sensors.146.4Controller operating modes.146.5Reduced operation.146.6Stand-by operation.146.7Frost protection.146.8Switching times means time program.146.9Manual operation.156.10Parameter setting facilities.156.11Factory setting, default values.156.11.1Characteristic heating curve.156.11.2Switching times, operating condition.156.12Switching relays.156.13Electrical requirements.156.13.1General.156.13.2Supply voltage.156.14Protection against electric shocks.15SIST EN 12098-3:2004
EN 12098-3:2002 (E)36.15Electromagnetic compatibility.166.16Degrees of protection.166.17Resistance to ambient temperature.166.18Materials.167Test methods.177.1Data protection.177.2Controller characteristic heating curve.177.2.1Test equipment.187.2.2Test results.197.3Sensors.197.4Controller operating modes.197.5Reduced operation.197.6Stand-by operation.197.7Frost protection.197.8Switching times.197.9Manual operation.197.10Setting facilities.207.11Factory settings.207.12Switching relays.207.13Electrical tests.207.14Protection against electrical shock.207.15Electro-magnetic compatibility.207.16Degrees of protection.207.17Environmental individual stress due to temperature.208Marking.209Documentation.219.1Technical documents.219.2Technical specifications.219.2.1Controller.219.2.2Sensors.219.3Instructions for installation.229.3.1Controller.229.3.2Sensors.229.4Instructions for operator - Controller.22Bibliography.23SIST EN 12098-3:2004
EN 12098-3:2002 (E)4ForewordThis document (EN 12098-3:2002) has been prepared by Technical Committee CEN /TC 247, "BuildingAutomation, Controls 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 orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003.This document includes a Bibliography.This document is part of series of standards relating to controllers for heating systems. It considers definitions,functionality, requirements, test methods, marking and documentation for outside temperature compensatedcontrols for electrical heating systems.The position of this document in the whole field of standards for mechanical building services is illustrated below.¬ HVAC = Heating, Ventilation, Air conditioningAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.Mechanical Building ServicesHeatingsystemsControl for mechanicalbuilding servicesVentilation and airconditioning systemsControls forheatingsystemsIndividual zonecontrol forHVAC ¬applicationsBuildingmanagementproducts andsystems forHVAC applicationsSystem neutraldatatransmission forHVACapplicationsOutside temperaturecompensated controlequipment for hotwater heating systemsOptimum start-stopcontrol equipment forhot water heatingsystemsOutside temperaturecompensated controlequipment forelectrical heatingsystemsOptimum start-stopcontrol equipment forelectrical heatingsystemsDefinitionsFunctionalityRequirementsTest methodsDocumentationSIST EN 12098-3:2004
EN 12098-3:2002 (E)5IntroductionThis European Standard covers outside temperature compensated controllers for electrical heating systems; itdoes not take into account charge rate and/or thermal optimisation functions.The equipment which regulates and programs the electrical heating in a building is intended to reduce the energyconsumption of the heating installations and improve comfort. It saves energy by preventing overheating.For this purpose, a central controller, like an outside temperature compensated controller is necessary, although insome cases this may not be sufficient.Key1Room thermostat2Emitter3Outside temperature4Main electrical supplyFigure 1
— Example of central control electrical heating system. OTC controller is generally completed byroom heating control. It can control main electrical supply or send an information to room controllersIncluded in this standard are the main equipment characteristics which assist in reaching these energy saving andcomfort objectives.The characteristics which are tested directly are :- accuracy of sensors,- part load characteristics. The characteristics which are to be indicated by the manufacturer are :- time constants.NOTE
This standard complies with the requirements and objectives of the interpretative document no. 6 "Energy Economy andHeat Retention" relating to the Construction Products Directive (89/106/EEC).SIST EN 12098-3:2004
EN 12098-3:2002 (E)61 ScopeThis standard applies to control function which controls and regulates the electrical energy in relation to the outsidetemperature and other reference variables (e.g.: room temperature, emitter temperature).This standard does not cover heat emitters.Input and output signals can be processed by analogue or digital techniques.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 50090-2-2Home and building electronic systems (HBES) – Part 2-2 : Systemoverview – General technical requirements.EN 60529Degrees of protection provided by enclosures (IP code) (IEC 60529:1989).EN 60730-1:2000Automatic electrical controls for household and similar use – Part 1 :General requirements (IEC 60430-1: 1999, modified)EN 60730-2-1Automatic electrical controls for household and similar use – Part 2-1 :Particular requirements for electrical controls for electrical householdappliances (IEC 60730-2-1:1989, modified).EN 60730-2-7Automatic electrical controls for household and similar use – Part 2-7 :Particular requirements for timers and time switches (IEC 60730-2-7:1990,modified).EN 60730-2-9Automatic electrical controls for household and similar use – Part 2-9 :Particular requirements for temperature sensing controls (IEC 60730-2-9:1992, modified).EN 60730-2-11Automatic electrical controls for household and similar use – Part 2-11:Particular requirements for energy regulators (IEC 60730-2-11:1993).EN 61000-3-2Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmoniccurrent emissions (equipment input current up to and including 16 A perphase) (IEC 61000-3-2:2000, modified).EN 61000-3-3Electromagnetic compatibility (EMC) - Part 3-3: Limits; Limitation ofvoltage changes, voltage fluctuations and flicker in public low-voltagesupply systems, for equipment with rated current 16 A perphase and not subject to conditional connection; Amendment A1 (IEC61000-3-3:1994/A1:2001)IEC/TR2 61000-3-4Electromagnetic compatibility (EMC) – Part 3-4: Limits – Limitation ofemission of harmonic currents in low-voltage power supply systems forequipment with rated current greater than 16 A.IEC/TR2 61000-3-5Electromagnetic compatibility (EMC) – Part 3: Limits - Section 5 : Limitationof voltage fluctuations and flicker in low-voltage power supply systems forequipment with rated current greater than 16 A.SIST EN 12098-3:2004
EN 12098-3:2002 (E)7EN 61000-6-1Electromagnetic compatibility (EMC) – Part 6-1: Generic standards -Immunity for residential, commercial and light industrial environments (IEC61000-6-1:1997, modified).EN 61000-6-3Electromagnetic compatibility (EMC) – Part 6-3: Generic standards -Emission standard for residential, commercial and light-industrialenvironments (IEC 61000-6-3:1996, modified).IEC 60038IEC standard voltages.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1 outside temperature compensated controller (OTC)the control device consists of the electronic controller, sensors and output signals but does not include theactuating equipment (see Figure 2)Figure 2
— Control equipment for electrical heating systems3.2 actuating equipmentequipment providing the means by which the controller affects the controlled variableActuatingequipmentHeat emittersOutputsignalsCONTROLLEROutsidetemperatureOtherreferencevariables,e-g roomtemperatureOTCSIST EN 12098-3:2004
EN 12098-3:2002 (E)83.3 controlled variableoutput signal controlling actuating equipment, either:-An on/off signal of cycling ratio F. The on-off period of a cycle is the cycling time.-An analogic or continuous signal proportionnal to F-A continuous data representing F valueCalculated in accordance with the equation:F (%) = 100 (Reference - Outside temperature)/DeviationWhere:- The reference is the value of the outside temperature for 0%- The deviation indicates the difference of the outside temperatures between operation at 0% and 100%.3.4 output signalssignals generated by the controller to regulate or control the actuating equipment3.5 reference variablesoutside temperature with or without other influences or variables (e.g. room temperature, emitter temperature) usedto determine the controlled variable3.6 outside temperaturereference variable sensor measuring outside temperature of the building3.7 outside temperature compensated controlchange of the controlled variable guided by the outside temperature3.8 nominal room temperatureresulting room temperature in the building arising in nominal operation of the controller. It is dependent on thedesign of the heating system and can be different for individual rooms.3.9 reduced room temperaturereduced room temperature compared with the nominal room temperature resulting from operation at a reduced setpoint3.10 stand-by room temperatureroom temperature resulting from switching off the heatingNOTE
If frost protection function is active, stand by temperature should be accepted above freezing point.3.11 controller characteristic heating curverelationship between the controlled variable and the reference variables, defined by two or more parameters3.12switch-ontimepoint in time at which the controller starts up the heating or modifies the set point in order to reach the nominalroom temperatureSIST EN 12098-3:2004
EN 12098-3:2002 (E)93.13switch-off timepoint in time at which the controller switches off the heating or modifies the set point in order to reach the reducedtemperature3.14nominal operationoperating period between the switch-on time and the switch-off time3.15reduced operationoperating period from the switch-off time up to the switch-on time, maintaining a reduced room temperaturecompared with the nominal room temperature3.16stand-by operationoperating mode in which the heating is switched off or subject to frost-protection room temperature control orprevent freezing inside the building without information of the room temperature control3.17manual operationmode in which the controller is inactive and the actuating equipment can be manipulated manually3.18frost protection functionthis function prevents freezing inside the buildingSIST EN 12098-3:2004
EN 12098-3:2002 (E)103.19temperature-time curveKey1Nominal room temperature2Reduced room temperature3Stand-by room temperatureASwitch-on timeBSwitch-off timeA-BNominal operationB-AReduced operation or stand by operationxTimeyRoom temperatureFigure 3
— Temperature-time curve4 Functionality4.1 Objective of controlThe aim of outside temperature compensated control is to provide comfort while saving energy by performing thesetwo main functions :- To control the electrical energy so that the inside temperature is maintained at the desired level, by calculating theheating demand from measurements of the outside temperature with or without other reference variables; - To alter the heat supply according to a program of adjustment of the desired inside temperature level, by means ofa time switch or a slaving device.
OTC control equipment can also incorporate a manual operation mode.SIST EN 12098-3:2004
EN 12098-3:2002 (E)11
4.2 Control equipment functionality
a optionalFigure 4 - Block diagram of control equipment4.3 Functional block InputsOutputsOutside Temperaturereal --------TOF---VARControlled variableOther reference variableareal --------TXElectrical rateareal --------ERS--- StatusDigitalActual timeatime --------tParametersHeating curvereal --------HCTemperature setting(s)real --------TOperation modesaBoolean---OMSwitching timesareal --------SWTCycling timeareal --------PX
Sensor(s)Outputsignal(s) O U T P U T(S) I N P U T(S)HeatingcurveparametersElectricalrateinformationaClocksettingsaChoice ofoperationmodeaControlledvariableshiftinga(reducedoperation)Frostprotectionlevel (frostprotectionoperationmode)aOutside temperature compensated controlCharacteristicsswitching orcharge rateprogrammingChoice of operationmode(reduced/standby)Manual orautomaticchoiceSIST EN 12098-3:2004
EN 12098-3:2002 (E)12
Name Type Description Unit INPUTS TO Real Outside temperature °C TXa Real Other reference variable(s)a, e.g. reference room temperature,emitter temperature… °C ERa Real orBoolean. Electrical ratea
ta Time Actual timea h:min:s OUTPUTS F Variable Controlled variable
S digital STATUS
PARAMETERS HC Real Heating curve characteristics °C or K T Real Temperature setting(s) or shifts: nominal, reduceda, standbya K OMa Boolean Operating modea
SWTa PXa Time Time Switching times (time schedule)a Cycling time (on-off period duration if F is on-off control) h:min:s
a optional
NOTE
Controllers can incorporate additional data processing functions, especially when using digital techniques.
These functions can be, for example :- To adapt or learn automatically characteristic heating curve parameters through the measurement of room temperature, overseveral days.- To set maximum heating power after the switch-on time to increase the rate of rise of room temperature.- To pre-heat with a load factor greater than the nominal load factor. - To pre-heat to a room temperature greater than the nominal temperature to meet comfort requirements, after return tooperation. - To shift automatically the switch-on time in order to reach the nominal room temperature at the desired time (optimum startscheduling). - To limit the floor and/or room temperature. - Sequential control for partial power operation. - To display measured data and/or calculations and/or parameter settings.
Such functions are not described in this part of the standard. Equipment incorporating these additional facilities can be taken into consideration only if it is possible to disable these functionsor set their parameters such that the requirements of this standard can be met during operation.
5 Graphical symbols
The graphical symbols shown in annex A (informative) of EN 12098-1:1996 are recommended for use on the userinterface. Plain text can be used instead of, or in conjunction with graphical symbols.
SIST EN 12098-3:2004
EN 12098-3:2002 (E)13 6 Requirements 6.1 Data protection
All data input on commissioning shall be retained for at least seventy-two hours on failure of the supply voltage. 6.2 Characteristic heating curve
The range of characteristic heating curve(s) can be displayed graphically by the manufacturer on the unit and/or inthe technical documents, as shown in Figure 5a or 5b. The relationships between the adjustable parameters andthe characteristic heating curves shall be sta
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