Energy Performance of Buildings - Controls for heating systems - Part 1: Control equipment for hot water heating systems - Modules M3-5, 6, 7, 8

This Standard applies to electronic control equipment for heating systems with water as the heating medium and a flow water temperature up to 120 °C. This control equipment controls and regulates the distribution and/or the generation of heat in relation to the outside temperature and time and other reference variables. This standard covers also controllers which contain an integrated optimum start or an optimum start-stop control function. Safety requirements on heating systems remain unaffected by this standard. The dynamic behaviour of the valves and actuators are not covered in this standard. A multi-distribution and/or multi-generation system needs a coordinated solution to prevent undesired interaction and is not part of this standard.

Engergieeffizienz von Gebäuden - Mess-, Steuer- und Regeleinrichtungen für Heizungen - Teil 1: Regeleinrichtungen für Warmwasserheizungen - Module M3-5, 6, 7, 8

Diese Norm gilt für elektronische Regeleinrichtungen für Heizungsanlagen mit Wasser als Wärmeträger und einer Vorlauftemperatur bis 120 °C.
Diese Regeleinrichtungen dienen der Steuerung der Wärmeverteilung und/oder -erzeugung in Abhängigkeit von der Außentemperatur, der Zeit und anderen Führungsgrößen.
Diese Norm behandelt auch Regeleinrichtungen mit integrierter Einschalt-Optimierungsfunktion oder Ein /Ausschalt-Optimierungsfunktion.
Sicherheitstechnische Anforderungen an Heizungsanlagen bleiben von dieser Norm unberührt.
Das dynamische Verhalten von Ventilen und Stellgliedern wird in dieser Norm nicht behandelt.
Eine Anlage mit mehreren Verteilkreisen und/oder Erzeugern erfordert eine koordinierte Lösung, um unerwünschte Wechselwirkungen zu vermeiden, und ist nicht Gegenstand dieser Norm.
Tabelle 1 zeigt die relative Position dieser Norm innerhalb des EPB-Normenpaketes im Kontext der in EN ISO 52000 1 dargelegten modularen Struktur.
ANMERKUNG 1   In CEN ISO/TR 52000 2 findet sich die gleiche Tabelle mit den Nummern (für jedes Modul) der jeweiligen EPB-Normen und den dazugehörigen Technischen Berichten, die bereits veröffentlicht wurden oder sich in der Erstellung befinden.
ANMERKUNG 2   Die Module repräsentieren EPB-Normen, auch wenn eine EPB-Norm mehr als ein Modul abdecken kann und ein Modul von mehr als einer EPB-Norm abgedeckt werden kann, zum Beispiel jeweils ein vereinfachtes und ein detailliertes Verfahren.

Performance énergétique des bâtiments - Régulation pour les systèmes de chauffage - Partie 1 : Equipement de régulation pour les systèmes de chauffage à eau chaude - Modules M3-5, 6, 7, 8

La présente Norme européenne s'applique aux dispositifs électroniques de régulation pour les systèmes de chauffage qui utilisent l'eau comme fluide caloporteur, avec une température de l'eau allant jusqu'à 120 °C.
Ces dispositifs de régulation servent à la commande et à la régulation de la distribution et/ou de la production de chaleur en fonction de la température extérieure et du temps, ainsi que d'autres variables de référence.
La présente norme couvre également les régulateurs contenant une fonction intégrée de commande de démarrage optimisé ou de démarrage-arrêt optimisé.
Les exigences de sécurité relatives aux systèmes de chauffage ne sont pas affectées par la présente norme.
Le comportement dynamique des vannes et des actionneurs n'est pas couvert par la présente norme.
Un système multi-distribution et/ou multi-production nécessite une solution coordonnée pour empêcher toute interaction indésirable, mais un tel système ne relève pas du domaine d'application de la présente norme.
Le tableau 1 présente la position de cette norme dans l’ensemble des normes PEB et dans le contexte de la structure modulaire comme décrit dans EN ISO 52000-1.
NOTE 1   Le même tableau se trouve dans CEN ISO/TR 52000-2 avec, pour chaque module, le nombre des normes PEB et les rapports techniques (TR) qui les accompagnent, publiés ou en préparation.
NOTE 2   Les modules représentent les normes PEB, bien qu’une norme peut recouvrir plus qu’un module et qu’un module peut être recouvert par plus qu’une norme PEB, comme par exemple une méthode simplifiée et une détaillée.

Energijske lastnosti stavb - Naprave za regulacijo sistemov za ogrevanje - 1. del: Naprave za regulacijo toplovodnih sistemov za ogrevanje - Moduli M3-5, 6, 7, 8

Ta standard se uporablja za elektronske naprave za regulacijo delovanja grelnih sistemov, pri katerih je grelni medij voda, ki dosega temperaturo do 120 °C. Ta naprava za regulacijo delovanja nadzira in ureja razporeditev in/ali proizvodnjo toplote glede na zunanjo temperaturo in čas ter druge referenčne spremenljivke. Ta standard zajema tudi regulacijske naprave z vgrajeno nadzorno funkcijo za optimalni začetek ali optimalni začetek/konec. Ta standard ne vpliva na varnostne zahteve za grelne sisteme. Dinamično obnašanje ventilov in sprožilnikov ni zajeto v tem standardu. Večdistribucijski in/ali večproizvodni sistem potrebuje usklajeno rešitev, da se preprečijo neželeni medsebojni vplivi, in ni del tega standarda.

General Information

Status
Withdrawn
Public Enquiry End Date
02-Feb-2016
Publication Date
17-Apr-2018
Withdrawal Date
07-Dec-2022
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
08-Dec-2022
Due Date
31-Dec-2022
Completion Date
08-Dec-2022

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Energijske lastnosti stavb - Naprave za regulacijo sistemov za ogrevanje - 1. del: Naprave za regulacijo toplovodnih sistemov za ogrevanje - Moduli M3-5, 6, 7, 8Engergieeffizienz von Gebäuden - Mess-, Steuer- und Regeleinrichtungen für Heizungen - Teil 1: Regeleinrichtungen für Warmwasserheizungen - Module M3-5, 6, 7, 8Performance énergétique des bâtiments - Régulation pour les systèmes de chauffage - Partie 1 : Equipement de régulation pour les systèmes de chauffage à eau chaude - Modules M3-5, 6, 7, 8Energy Performance of Buildings - Controls for heating systems - Part 1: Control equipment for hot water heating systems - Modules M3-5, 6, 7, 897.120Avtomatske krmilne naprave za domAutomatic controls for household use91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 12098-1:2017SIST EN 12098-1:2018en,fr,de01-maj-2018SIST EN 12098-1:2018SLOVENSKI

STANDARDSIST EN 12098-1:20131DGRPHãþD
SIST EN 12098-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12098-1
May
t r s y ICS
{ sä s v rä s râ
{ yä s t r Supersedes EN
s t r { zæ sã t r s uEnglish Version
Energy Performance of Buildings æ Controls for heating systems æ Part
sã Control equipment for hot water heating systems æ Modules M uæ wá

z Performance énergétique des bâtiments æ Régulation pour les systèmes de chauffage æ Partie

s ã Equipement de régulation pour les systèmes de chauffage à eau chaude æ Modules M uæ wá

Engergieeffizienz von Gebäuden æ Messæá Steueræ und Regeleinrichtungen für Heizungen æ Teil

sã Regeleinrichtungen für Warmwasserheizungen æ Module M uæ wá
z This European Standard was approved by CEN on
t y February
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s t r { zæ sã t r s y ESIST EN 12098-1:2018

EN 12098-1:2017 (E) 2 Contents Page European foreword ....................................................................................................................................................... 4 Introduction .................................................................................................................................................................... 5 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 8 3 Terms and definitions ................................................................................................................................... 8 4 Symbols, subscripts and abbreviations................................................................................................ 15 4.1 Symbols ............................................................................................................................................................ 15 4.2 Subscripts ........................................................................................................................................................ 15 5 Functionality .................................................................................................................................................. 15 5.1 Functional objective .................................................................................................................................... 15 5.2 Control equipment functionality ............................................................................................................ 15 6 Requirements ................................................................................................................................................ 16 6.1 Data protection ............................................................................................................................................. 16 6.2 Characteristic heating curve .................................................................................................................... 17 6.3 Input signal – Sensors ................................................................................................................................. 18 6.4 Controller operation modes ..................................................................................................................... 18 6.4.1 General ............................................................................................................................................................. 18 6.4.2 Comfort operation mode ........................................................................................................................... 18 6.4.3 Economy operation mode ......................................................................................................................... 18 6.4.4 Building protection operation mode .................................................................................................... 19 6.4.5 Automatic operation mode ....................................................................................................................... 19 6.5 Frost protection ............................................................................................................................................ 19 6.6 Additional functions .................................................................................................................................... 19 6.6.1 General ............................................................................................................................................................. 19 6.6.2 Summer/Winter switch function ........................................................................................................... 19 6.6.3 Set back function .......................................................................................................................................... 19 6.6.4 Optimum start function ............................................................................................................................. 19 6.6.5 Optimum stop function .............................................................................................................................. 19 6.7 Switching times ............................................................................................................................................. 20 6.8 Manual Operation Mode (MOM) ............................................................................................................. 20 6.9 Parameter settings ...................................................................................................................................... 21 6.10 Factory settings/Default values .............................................................................................................. 21 6.10.1 Characteristic heating curve .................................................................................................................... 21 6.10.2 Switching times/Operating condition .................................................................................................. 21 6.11 Switching relays ............................................................................................................................................ 21 6.12 Electrical requirements ............................................................................................................................. 21 6.12.1 Electrical connections ................................................................................................................................ 21 6.12.2 Supply voltage ............................................................................................................................................... 21 6.12.3 Electrical safety ............................................................................................................................................. 21 6.12.4 Electro-magnetic compatibility .............................................................................................................. 21 6.13 Degree of protection ................................................................................................................................... 22 6.14 Environmentally induced stress due to temperature ..................................................................... 22 6.15 Materials .......................................................................................................................................................... 22 6.16 Use of graphical symbols ........................................................................................................................... 22 SIST EN 12098-1:2018

EN 12098-1:2017 (E) 3 7 Test methods .................................................................................................................................................. 22 7.1 Data protection .............................................................................................................................................. 22 7.2 Controller operation modes ..................................................................................................................... 22 7.3 Controller characteristic heating curve ............................................................................................... 22 7.4 Frost protection............................................................................................................................................. 27 7.5 Switching times ............................................................................................................................................. 27 7.6 Manual Operation Mode ............................................................................................................................. 27 7.7 Optimum start-stop function .................................................................................................................... 27 7.7.1 General ............................................................................................................................................................. 27 7.7.2 Test conditions .............................................................................................................................................. 29 7.7.3 Test run ............................................................................................................................................................ 29 7.7.4 Test results start optimization ................................................................................................................ 29 7.8 Test results stop optimization ................................................................................................................. 31 7.9 Summer/Winter-switch ............................................................................................................................. 32 7.10 Set back ............................................................................................................................................................ 32 7.11 Parameter settings ....................................................................................................................................... 32 7.12 Factory settings ............................................................................................................................................. 32 7.13 Switching relays ............................................................................................................................................ 32 7.14 Electrical test .................................................................................................................................................. 32 7.15 Degrees of protection .................................................................................................................................. 32 7.16 Environmental individual stress due to temperature..................................................................... 32 8 Marking ............................................................................................................................................................ 33 9 Documentation .............................................................................................................................................. 33 9.1 Technical documents................................................................................................................................... 33 9.2 Technical specifications ............................................................................................................................. 33 9.2.1 Controller ........................................................................................................................................................ 33 9.2.2 Output signals ................................................................................................................................................ 34 9.2.3 Input signals (Sensors) ............................................................................................................................... 34 9.3 Instruction installation ............................................................................................................................... 34 9.4 User guideline ................................................................................................................................................ 34 Bibliography ................................................................................................................................................................. 35 SIST EN 12098-1:2018

EN 12098-1:2017 (E) 4 European foreword This document (EN 12098-1:2017) has been prepared by Technical Committee CEN/TC 247 “Building Automation, 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 or by endorsement, at the latest by November 2017 and conflicting national standards shall be withdrawn at the latest by November 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12098-1:2013. This document has been prepared under a mandate [11] given to CEN by the European Commission and the European Free Trade Association. The most important changes in comparison with EN 12098-1:2013 are: — respecting the presentation of this project in the frame EPB in accordance with the drafting rules; — Clause 6.7 Switching times and Table 2 introducing networked clocks improvements in line with EN 12098-5 modifications. This document is part of the set of standards on the energy performance of buildings (the set of EPB standards). In case this standard is used in the context of national or regional legal requirements, mandatory choices may be given at national or regional level for such specific applications, in particular for the application within the context of EU Directives transposed into national legal requirements. Further target groups are users of the voluntary common European Union certification scheme for the energy performance of non-residential buildings (EPBD art. 11.9) and any other regional (e.g. Pan European) parties wanting to motivate their assumptions by classifying the building energy performance for a dedicated building stock. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 5 Introduction This European Standard is part of a series of standards aiming at international harmonization of the methodology for the assessment of the energy performance of buildings, called “EPB set of standards”. As part of the “EPB set of standards” it complies with the requirements for the set of basic EPB documents EN ISO 52000-1 (see Normative references), CEN/TS 16628 and CEN/TS 16629 (see bibliography [2] and [3]) developed under a mandate given to CEN by the European Commission and the European Free Trade Association (Mandate M/480). The standards issued by TC 247 for M/480 belong to the EPB set of standards and are in line with the over-arching standard (EN ISO 52000-1) and drafted in accordance with the basic principles and detailed technical rules developed in the Phase I of the mandate. Also these standards are clearly identified in the modular structure developed to ensure a transparent and coherent EPB standard set. BAC (Building Automation and Control) is identified in the modular structure as Technical Building System M10. However, the standards of TC 247 deal with control accuracy, control functions and control strategies using standards communications protocol (these last standards do not belong to the EPB standards set). To avoid a duplication of calculation due to the BAC (avoid double impact), no calculation are done in BAC EPB standard set, but in each underlying standard of EPB set of standards (from M1 to M9 in the Modular Structure), an IDENTIFIER developed and present in the M10 covered by EN 15232-1 is used where appropriate. These way of interaction is described in detailed in the Technical Report (CEN ISO/TR 52000-2) accompanying the over-arching standard. As a consequence, the Annex A and Annex B concept as EXCEL sheet with the calculation formulas used in the EPB standards are not applicable for the standards issued by TC 247 for M/480. The main target groups of this standard are all the users of the set of EPB standards (e.g. architects, engineers, regulators). Further target groups are parties wanting to motivate their assumptions by classifying the building energy performance for a dedicated building stock. More information is provided in the Technical Report accompanying this standard (CEN/TR 12098-6:2015 [5]). SIST EN 12098-1:2018

EN 12098-1:2017 (E) 6 1 Scope This European Standard applies to electronic control equipment for heating systems with water as the heating medium and a supply water temperature up to 120 °C. This control equipment controls the distribution and/or the generation of heat in relation to the outside temperature and time and other reference variables. This standard covers also controllers that contain an integrated optimum start or an optimum start-stop control function. Safety requirements on heating systems remain unaffected by this standard. The dynamic behaviour of the valves and actuators are not covered in this standard. A multi-distribution and/or multi-generation system needs a coordinated solution to prevent undesired interaction and is not part of this standard. Table 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000-1. NOTE 1 In CEN ISO/TR 52000-2 the same table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying Technical Reports that are published or in preparation. NOTE 2 The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 7 Table 1 — Position of this standard (in casu M3–5, 6, 7, 8), within the modular structure of the set of EPB standards

Over-arching Building (as such) Technical Building System Submodule Descriptions Descriptions Descriptions Heating Cooling Ventilation Humidification Dehumidification Domestic Hot waters Lighting Building automation and control PV, wind, .. sub1 M1 M2

M3 M4 M5 M6 M7 M8 M9 M10 M11 1 General General General

2 Common terms and definitions; symbols, units and subscripts Building Energy Needs Needs

3 Application (Free) Indoor Conditions without Systems Maximum Load and Power

4 Ways to Express Energy Performance Ways to Express Energy Performance Ways to Express Energy Performance

5 Building Functions and Building Boundaries Heat Transfer by Transmission Emission and control x

6 Building Occupancy and Operating Conditions Heat Transfer by Infiltration and Ventilation Distribution and control x

7 Aggregation of Energy Services and Energy Carriers Internal Heat Gains Storage and control x

8 Building Partitioning Solar Heat Gains Generation and control x

9 Calculated Energy Performance Building Dynamics (thermal mass) Load dispatching and operating conditions

10 Measured Energy Performance Measured Energy Performance Measured Energy Performance

11 Inspection Inspection Inspection
12 Ways to Express Indoor Comfort
BMS
13 External Environment Conditions
14a Economic Calculation
a The shaded modules are not applicable. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 8 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 12098-5, Controls for heating systems - Part 5: Start-stop schedulers for heating systems EN 60038, CENELEC standard voltages (IEC 60038) EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529) EN 60730-1, Automatic electrical controls for household and similar use - Part 1: General requirements (IEC 60730-1) EN ISO 7345:1995, Thermal insulation - Physical quantities and definitions (ISO 7345:1987) EN ISO 52000-1:2017, Energy performance of buildings - Overarching EPB assessment - Part 1: General framework and procedures (ISO 52000-1:2017) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 7345:1995 and EN ISO 52000-1:2017 and the following apply. 3.1 outside temperature compensated controller OTC controller controller optimizing and regulating the generation and/or distribution of heat in relation to the outside temperature, time and other reference variables Note 1 to entry: The outside temperature compensated function calculates the flow (supply) temperature in relation to the outside temperature, based on the heating curve. Note 2 to entry: The outside temperature optimum start-stop function calculates the pre-heat time and/or stop time to reach the comfort temperature level in relation with the outside temperature, switch time and several parameters (e.g. room temperature). 3.2 control equipment equipment which consists of the OTC controller, and connectors for sensor input signals and output signals, but does not include the sensors and actuating equipment Note 1 to entry: See Figure 1. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 9

Key 1 OTC 2 output signals 3 input signals: reference variables 4 input signal: controlled variable 5 actuating equipment 6 heat generation or distribution Figure 1 — Control equipment for heating systems 3.3 actuating equipment equipment by which the controller affects the controlled variable 3.4 controlled variable supply water temperature and/or boiler water temperature as a result of the heating curve in accordance to the reference variables Note 1 to entry: The controlled variable is an input signal. 3.5 output signals signals generated by the OTC controller for operating the actuating equipment 3.6 reference variables outside temperature with or without other influences or variables (e.g. room temperature) used to determine the setpoint of the controlled variable Note 1 to entry: The controlled variable is an input signal. 3.7 outside temperature reference variable that is measured with a sensor fitted outside the building, mainly intended to measure the ambient air temperature 3.8 room temperature resulting temperature in the building arising in comfort, economy or building protection operation mode of the OTC controller Note 1 to entry: Room temperature can be different for individual rooms. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 10 3.9 characteristic heating curve relation between the setpoint value of the controlled variable (e.g. supply water temperature) and the reference variables (outside air temperature) defined by two or more parameters and depending on operation mode and additional variables Note 1 to entry: The setpoint of supply water temperature is a function of the outside temperature and the present room temperature setpoint. The setpoint of supply water temperature as function of the outside temperature is graphically represented by the heating curve. 3.10 comfort operation mode mode of operation between the switch-on time and the switch-off time, maintaining comfort room temperature Note 1 to entry: Mode of operation for normally occupied rooms. 3.11 economy operation mode mode of operation between the switch-off time and the switch-on time, maintaining a reduced room temperature compared to the comfort room temperature Note 1 to entry: Economy operation mode is a reduced mode. 3.12 building protection operation mode mode of operation between the switch-off time and the switch-on time, maintaining a room temperature required for building protection Note 1 to entry: Building protection operation mode is a reduced mode. 3.13 automatic operation mode mode of operation of equipment when significant control functions are not overridden by the user Note 1 to entry: The operation mode is selected automatically according to the scheduler, actual date and time. 3.14 summer/winter switch function seasonal switch on/off of the heating depending on a function of the outside air temperature 3.15 set back function function, starting when the operation mode changes from comfort to economy or building protection mode Note 1 to entry: During set back period, the heating is switched off until the calculated or measured room temperature drops below the economy or building protection setpoint; the operation mode switches back to comfort mode or the calculated switch-on time of the optimization start function is reached. SIST EN 12098-1:2018

EN 12098-1:2017 (E) 11 3.16 optimum start function function, calculation the optimum pre-heat time to reach the comfort temperature level at the beginning of the comfort occupation period Note 1 to entry: See Figure 2. Note 2 to entry: The optimum start- and the optimum stop functions are illustrated by Figure 3. Heating periods are different from scheduled occupation periods. These differences, due to thermal inertia, depend mainly on heating loads (or temperature differences). A start and/or stop optimizer controls these switching points, using outside and/or room temperatures of their differences in relation to setpoints.

Key r,cmfT comfort room temperature r,redT reduced room temperature 1t beginning of comfort occupation period 2t switch-on time with start optimization (variable start) 3t switch-on time without start optimization (fixed start) 4t end of comfort occupation period without stop optimization (fixed stop) 5t switch-off time with stop optimization (variable stop) cmft comfort occupation period:=−cmf41ttt wast time period of wasted heat (energy saving potential with start optimization) NOTE −21tt is the optimum start period. −54ttis the optimum stop period Figure 2 — Temperature time curve with optimiser function SIST EN 12098-1:2018

EN 12098-1:2017 (E) 12

Key S schedule occupation period O heating operation status R room temperature profile 1 comfort room temperature 2 reduced room temperature 3 comfort occupation period 4 optimum start period 5 main controller function 6 optimum stop period 7 set back period Figure 3 — Example Optimum start and stop function 3.17 adaptive optimum start function added function to optimum start function, which recalculates the parameters used to determine the switch-on time, based on measured room temperature 3.18 optimum stop function function, switching off or reducing the heat gen

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