Controls for heating systems - Part 6: Accompanying TR prEN 12098-1:2015 - Modules M3-5,6,7,8

This Technical Report refers to prEN 12098-1:2015, Controls for heating systems - Part 1: Control equipment for hot water heating systems - Modules M3-5,6,7,8.
It contains information to support the correct understanding, use and national adaption of prEN 12098-1:2015.
This Technical Report does not contain any normative provision.

Begleitender TR zu EN 12098-1

Energijske lastnosti stavb - Naprave za regulacijo sistemov za ogrevanje - 6. del: Razlaga in utemeljitev prEN 12098-1:2015 - Moduli M3-5, 6, 7, 8

To tehnično poročilo se nanaša na standard prEN 12098-1:2015, Nadzor za sisteme ogrevanja – 1. del: Oprema za nadzor toplovodnih sistemov za ogrevanje – moduli M3-5,6,7,8.
Vsebuje informacije za podporo pravilnega razumevanja, uporabe in nacionalne prilagoditve standarda prEN 12098-1:2015.
To tehnično poročilo ne vsebuje nobenih normativnih določb.

General Information

Status
Withdrawn
Public Enquiry End Date
09-Mar-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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SLOVENSKI STANDARD
SIST-TP CEN/TR 12098-6:2018
01-maj-2018

Energijske lastnosti stavb - Naprave za regulacijo sistemov za ogrevanje - 6. del:

Razlaga in utemeljitev prEN 12098-1:2015 - Moduli M3-5, 6, 7, 8

Controls for heating systems - Part 6: Accompanying TR prEN 12098-1:2015 - Modules

M3-5,6,7,8
Ta slovenski standard je istoveten z: CEN/TR 12098-6:2016
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
SIST-TP CEN/TR 12098-6:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 12098-6:2018
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SIST-TP CEN/TR 12098-6:2018
CEN/TR 12098-6
TECHNICAL REPORT
RAPPORT TECHNIQUE
August 2016
TECHNISCHER BERICHT
ICS 91.140.10; 97.120
English Version
Controls for heating systems - Part 6: Accompanying TR
prEN 12098-1:2015 - Modules M3-5,6,7,8
Begleitender TR zu EN 12098-1

This Technical Report was approved by CEN on 11 April 2016. It has been drawn up by the Technical Committee CEN/TC 247.

CEN members are the national standards bodies of 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 12098-6:2016 E

worldwide for CEN national Members.
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CEN/TR 12098-6:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 7

4 Symbols and abbreviations ......................................................................................................................... 7

4.1 Symbols ............................................................................................................................................................... 7

4.2 Abbreviations ................................................................................................................................................... 8

5 Control heating systems, main design rules .......................................................................................... 8

5.1 Control heating systems, main design rules, general ......................................................................... 8

5.2 Partitioning control heating zones in buildings .................................................................................. 8

5.2.1 General ................................................................................................................................................................ 8

5.2.2 Emission control .............................................................................................................................................. 9

6 Control heating functions and they impact ......................................................................................... 10

6.1 Flow temperature control ......................................................................................................................... 10

6.1.1 General ............................................................................................................................................................. 10

6.1.2 OTC generation and storage impact ...................................................................................................... 10

6.1.3 OTC control distribution impact ............................................................................................................. 11

6.1.4 OTC control emission impact ................................................................................................................... 11

6.2 Auto tuning heating curve parameters ................................................................................................ 12

6.3 Compensation by emitters energy demand transmission ............................................................ 12

6.4 Other meteorological variables and forecast .................................................................................... 12

6.5 Optimum Start-stop scheduling .............................................................................................................. 12

6.5.1 General ............................................................................................................................................................. 12

6.5.2 OSS generation and storage impact ....................................................................................................... 12

6.5.3 OSS distribution impact ............................................................................................................................. 12

6.5.4 OSS emission impact ................................................................................................................................... 13

6.6 Summer-winter switch ............................................................................................................................... 13

6.7 Pumps control ............................................................................................................................................... 14

7 Integrated functions in control systems and their impact ............................................................ 14

7.1 Integrated functions .................................................................................................................................... 14

7.2 Central control effect on room temperature control ...................................................................... 15

7.2.1 General ............................................................................................................................................................. 15

7.2.2 Flow temperature control accuracy ...................................................................................................... 15

7.2.3 Heating curve adaptation .......................................................................................................................... 15

7.2.4 Calculating contribution of central control to emission control................................................. 15

Annex A (informative) Applications of heating control functions for buildings ................................ 18

Bibliography ................................................................................................................................................................. 20

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SIST-TP CEN/TR 12098-6:2018
CEN/TR 12098-6:2016 (E)
European foreword

This document (CEN/TR 12098-6:2016) has been prepared by Technical Committee CEN/TC 247

“Building Automation, Controls and Building Management”, the secretariat of which is held by SNV.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.
This document is currently divided into the following parts:

— Controls for heating systems — Part 1: Control equipment for hot water heating systems;

— Controls for heating systems — Part 3: Control equipment for electrical heating systems;

— Controls for heating systems — Part 5: Start-stop schedulers for heating systems;

— Controls for heating systems — Part 6: Accompanying TR prEN 12098-1:2016 Modules M3-5,6,7,8

[the present Technical Report; currently at Voting stage];

— Controls for heating systems — Part 7: Accompanying TR prEN 12098-3:2016 Modules M3-5,6,7,8

[Technical Report; currently at Voting stage];

— Controls for heating systems — Part 8: Accompanying TR prEN 12098-5:2016 Modules M3-5,6,7,8

[Technical Report; currently at Voting stage].
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Introduction

The CENSE project, the discussion between CEN and the Concerted action highlighted the high page

count of the entire package due to a lot of “textbook” information. This resulted in flooding and

confusing the normative text.

A huge amount of informative contents shall indeed be recorded and available for users to properly

understand, apply and nationally adapt the EPB standards.

The detailed technical rules CEN/TS 16629 ask for a clear separation between normative and

informative contents:

— to avoid flooding and confusing the actual normative part with informative content;

— to reduce the page count of the actual standard;
— to facilitate understanding of the package.

Therefore each EPB standard shall be accompanied by an informative technical report, like this one,

where all informative content is collected.
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Table 1 shows the relative position of this TR within the EPB set of standards.
Table 1 — Relative position of this TR within the EN EPB package standards
Over- Building Technical Building System
arching (as such)
M M M M
sub1 M1 M2 M5 M6 M7 M8 M10
3 4 9 11
1 General General General
Common
terms and
Building
definitions;
2 Energy Needs
symbols,
Needs
units and
subscripts
(Free)
Indoor Maximum
3 Application Condition Load and
s without Power
Systems
Ways to
Ways to Ways to
Express
Express Express
4 Energy
Energy Energy
Performa
Performance Performance
nce
Heat
Building
Transfer
Functions and Emission and
5 by x
Building control
Transmis
Boundaries
sion
Heat
Building Transfer
Occupancy by
Distribution
6 and Infiltratio x
and control
Operating n and
Conditions Ventilatio
Aggregation
of Energy Internal
Storage and
7 Services and Heat x
control
Energy Gains
Carriers
8 x
Building Solar Generation
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic Hot
waters
Lighting
Building
automation and
control
PV, wind, ..
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Over- Building Technical Building System
arching (as such)
M M M M
sub1 M1 M2 M5 M6 M7 M8 M10
3 4 9 11
Partitioning Heat and control
Gains
Load
Building
Calculated dispatching
Dynamics
9 Energy and
(thermal
Performance operating
mass)
conditions
Measured
Measured Measured
Energy
10 Energy Energy
Performa
Performance Performance
nce
Inspectio
11 Inspection Inspection
Ways to
Express
12 BMS
Indoor
Comfort
External
13 Environment
Conditions
Economic
Calculation
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic Hot
waters
Lighting
Building
automation and
control
PV, wind, ..
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1 Scope

This Technical Report refers to EN 12098-1:2016, Controls for heating systems — Part 1: Control

equipment for hot water heating systems — Modules M3-5,6,7,8.

It contains information to support the correct understanding, use and national adaption of

prEN 12098-1:2016.
This Technical Report does not contain any normative provisions.
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 215, Thermostatic radiator valves - Requirements and test methods

prEN 12098-1:2016, Controls for heating systems — Part 1: Control equipment for hot water heating

systems — Modules M3-5,6,7,8

prEN 15232-1:2016, Energy performance of buildings — Part 1: Impact of Building Automation, Controls

and Building Management — Modules M10-4,5,6,7,8,9,10

EN 15316–2-3:2007, Heating systems in buildings - Method for calculation of system energy requirements

and system efficiencies - Part 2-3: Space heating distribution systems

prEN 15316-3:2016, Heating systems and water based cooling systems in buildings — Method for

calculation of system energy requirements and system efficiencies — Part 3: Space distribution systems

(DHW, heating and cooling)

prEN 15316-4-1:2016, Heating systems and water based cooling systems in buildings — Method for

calculation of system energy requirements and system efficiencies — Part 4-1: Space heating and DHW

generation systems, combustion systems (boilers, biomass)

prEN 15500-1:2016, Control for heating, ventilating and air-conditioning applications — Part 1:

Electronic individual zone control equipment — Modules M3-5,M4-5,M5-5

prEN ISO 52000-1:2016, Energy performance of buildings — Overarching EPB assessment — Part 1:

General framework and procedures (ISO/DIS 52000-1:2016)

EN ISO 7345:1995, Thermal insulation - Physical quantities and definitions (ISO 7345:1987)

3 Terms and definitions

For the purposes of this technical report, the terms and definitions given in EN ISO 7345:1995,

prEN ISO 52000-1:2016, prEN 12098-1:2016 and prEN 15232-1:2016 apply.
4 Symbols and abbreviations
4.1 Symbols

For the purposes of this European Standard, the symbols given in prEN ISO 52000-1:2016 and

prEN 12098-1:2016 (the accompanied EPB standard) apply.
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4.2 Abbreviations
Abbreviation Term
OTC outside temperature compensated
RTC room temperature control
FSS fixed start-stop scheduling
OSS optimum start –stop scheduling
TRV thermostatic radiator valve
5 Control heating systems, main design rules
5.1 Control heating systems, main design rules, general

Efficient Heating control system consists on integrated functions applied to all parts of the water

heating system: emission or room control by TRV or RTC, flow temperature control by OTC control, FSS,

OSS, pumps and generators sequencing and controls, thermal storage management, cost optimization of

thermal resources taking account smart metering, predictable or detected occupancy.

5.2 Partitioning control heating zones in buildings
5.2.1 General

For efficiently control heating, the flow temperature level of generation and distribution system shall

satisfy heat demand to the lowest flow temperature. For this purpose, flow temperature is compensated

by outside temperature and scheduled for intermittent heating in relation with conditions of use. For

efficiency of control systems:

— The heating system distribution building shall be partitioned into zones or spaces with uniform

conditions of use;

Partitioning of heating systems described on EN 5200-1:2016, Clause 10, D.2, D.3, may usefully be

applied for the design of heating systems.

— The zone partitioning of the building shall take account thermal characteristics of emitters (all

identical emitters) of a zone;

— BAC heating control system shall have multiple controls and intermittent scheduling adapted to

zones or spaces conditions of use. Special attention shall be done to keep watch for update set

points and schedulers to real conditions of use and needs, during exploitation.
For satisfy these indications; size of zones shall be limited.

NOTE An indication is given in EN 15316–2–3:2007, A2: limit zones area to 1000 m2 (one pump for a

maximum of 1 000 m2).

As a general rule, heating control systems consists to integrate many functions applied to central

(generation, storage), zone (distribution) and room (emission) parts of heating systems.

OTC control and OSS and complementary integrated functions specified by prEN 12098-1:2016 and

fulfil items in prEN 15232-1:2015, Table 1, 1.3, 1.4, 1.4, 1.5.

NOTE Better control and scheduling of heating systems imply a data communication network linking control

devices for integration of these functions and other technical building management capabilities for energy

performance.

For these parts, objectives of control functions are: the lowest flow temperature and the longest

reduced or stop heat generation periods and pumps operation.
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Generation (see prEN 15316-4-1:2016) and distribution (see EN 15316–2-3) parts are controlled acting

water flow temperature while emission is controlled via the flow through emitters.

These central controls applied to building, zones and spaces (see Figure 1) taking into account thermal

characteristics and conditions of use (see prEN ISO 52000-1:2016, Clause 10, D.2, D.3).

Emitters of a zone or space controlled by an OTC controller shall be of the same model, for conformity

with a single heating curve shape common to all emitters of the controlled zone, i.e. don’t mix different

types of steel radiators, heating floor or fan coil on a distribution controlled by an OTC controller.

5.2.2 Emission control

Individual control of emitters or RTC completes central control by individual emitter’s controllers

acting flow through emitters. The aim of individual control consist to adapt conditions of operation

(individual set point, individual scheduling), to consumers' needs (see prEN 15232-1:2016, Figure 1)

and to compensate room heat gains, reducing heating for comfort and energy saving.

However, individual room temperature control performance doesn’t depend only of individual

controllers; it depends also of the flow temperature central (generation, distribution) control, mainly

for these cases:
— Emitters are not equipped with efficient electronic individual RTC (conform to
prEN 15500-1:2016);

— Users are not encouraged to adapt the set point of their room temperature controller considering

their comfort needs related to energy consumption;

— Heated room or space don’t permit to measure a representative temperature for individual (closed

loop) RTC, e.g.: entrance, corridor, reception hall, exhibition hall, atrium, Emission control is

operated only by the flow temperature control (generation, distribution parts).
Whatever:

— For accuracy of a room controller, the flow temperature of emitters shall be adapted to the heating

load; i.e. related to the main influence, the outside temperature. OTC control improves control

efficiently of individual controllers limiting the role of these controllers to compensate heat gains

and avoiding hanging process of these closed control loops;

— For avoid energy wasting by unusual use, inattentive settings or defaults of room controllers, the

central OTC control limit the higher room temperature able to be reached.

EXAMPLE Room temperature able to be reached by OTC control may be limited to 22 °C, room controller

reduce this level, modulating flow through emitter.
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Key
1 generation
2 distribution
3 emission
4 OTC controller
5 electronic room controller
S1, S2, S3 elementary spaces
Z1, Z2 zones
Figure 1 — Control heating systems parts
6 Control heating functions and they impact
6.1 Flow temperature control
6.1.1 General

Water temperature control by OTC control (function in standalone devices or BAC systems) shall be

applied to generation and distribution parts (see figure.1).
6.1.2 OTC generation and storage impact

Flow temperature control improves efficiency generators, minimizes heat losses of tanks and associated

equipment (see prEN 15316-4-1:2016).
Controlling flow temperature to the lowest during normal condi
...

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