prEN ISO 16484-4

Building automation and control systems (BACS) - Part 4: Control applications (ISO/DIS 16484-4:2023)

This document specifies control applications and function blocks focusing on but not limited to lighting, solar protection, and HVAC applications.
It describes how energy performance, comfort, and operational requirements of buildings are translated into functional specifications for integrated plant and room control.

Systeme der Gebäudeautomation - Teil 4: Steuerungsanwendung (ISO/DIS 16484‑4:2023)

Dieses Dokument legt Steuerungsanwendungen und Funktionsblöcke, mit Schwerpunkt auf Beleuchtung, Sonnenschutz und HLK-Anwendungen, fest.
Es beschreibt, wie Energieeffizienz, Komfort und betriebliche Anforderungen von Gebäuden auf funktionale Spezifikationen für integrierte Anlagen- und Raumautomation übertragen werden.

Systèmes d'automatisation et de contrôle des bâtiments (BACS) - Partie 4: Applications de contrôle (ISO/DIS 16484-4:2023)

Sistemi za avtomatizacijo in regulacijo stavb (BACS) - 4. del: Izvedba regulacije (ISO/DIS 16484-4:2023)

General Information

• Status: Not Published
• Publication Date: 28-Sep-2025
• ICS: 35.240.67 - IT applications in building and construction industry
• ICS: 91.040.01 - Buildings in general
• Technical Committee: CEN/TC 247 - Controls for mechanical building services
• Drafting Committee: CEN/TC 247/WG 4 - Open System Data Transmission
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 13-Mar-2024
• Completion Date: 13-Mar-2024
• Ref Project: oSIST prEN ISO 16484-4:2024 - Building automation and control systems (BACS) - Part 4: Control applications (ISO/DIS 16484-4:2023)

Relations

• Revises: EN 17609:2022 - Building automation and control systems - Control applications
• Effective Date: 19-Apr-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2024
Sistemi za avtomatizacijo in regulacijo stavb (BACS) - 4. del: Izvedba regulacije
(ISO/DIS 16484-4:2023)
Building automation and control systems (BACS) - Part 4: Control applications (ISO/DIS
16484-4:2023)
Systeme der Gebäudeautomation - Steuerungsanwendung (ISO/DIS 16484-4:2023)
Systèmes d'automatisation et de contrôle des bâtiments (BACS) - Partie 4: Applications
de contrôle (ISO/DIS 16484-4:2023)
Ta slovenski standard je istoveten z: prEN ISO 16484-4
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
91.140.01 Napeljave v stavbah na Installations in buildings in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 16484-4
ISO/TC 205 Secretariat: ANSI
Voting begins on: Voting terminates on:
2023-12-20 2024-03-13
Building automation and control systems (BACS) —
Part 4:
Control applications
Systèmes d'automatisation et de régulation des bâtiments —
Partie 4: Applications de régulation
ICS: 35.240.67; 91.040.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 16484-4:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 16484-4:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16484-4
ISO/TC 205 Secretariat: ANSI
Voting begins on: Voting terminates on:

Building automation and control systems (BACS) —
Part 4:
Control applications
Systèmes d'automatisation et de régulation des bâtiments —
Partie 4: Applications de régulation
ICS: 35.240.67; 91.040.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 16484-4:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 16484-4:2023(E)
Contents Page
Foreword . vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviations . 3
5 Functional specifications having an impact on energy performance, comfort, and
operational requirements of buildings . 5
5.1 Heating control . 5
5.1.1 Emission control . 5
5.1.2 Emission control for TABS (heating mode) . 8
5.1.3 Control of distribution network hot water temperature (supply or return) . 11
5.1.4 Control of distribution pumps in networks .13
5.1.5 Intermittent control of emission and/or distribution . 16
5.1.6 Heat generator control (combustion and district heating) . 19
5.1.7 Heat generator control (heat pump) . 20
5.1.8 Heat generator control (outdoor unit) . 22
5.1.9 Sequencing of different heat generators . 23
5.1.10 Control of Thermal Energy Storage (TES) charging. 25
5.1.11 Hydronic balancing heating distribution (including contribution to
balancing to the emission side) . 26
5.2 Domestic hot water supply control .29
5.2.1 Control of DHW storage charging with direct electric heating or integrated
electric heat pump .29
5.2.2 Control of DHW storage charging using hot water generation .30
5.2.3 Control of DHW storage charging with solar collector and supplementary
heat generation . 31
5.2.4 Control of DHW circulation pump . 33
5.3 Cooling control .34
5.3.1 Emission Control .34
5.3.2 Emission control for TABS (cooling mode) . 37
5.3.3 Control of distribution network chilled water temperature (supply or
return) .40
5.3.4 Control of distribution pumps in hydraulic networks . 41
5.3.5 Intermittent Control of Emission and/or Distribution . 43
5.3.6 Interlock between heating and cooling control of emission and/or
distribution . 47
5.3.7 Generator control for cooling .48
5.3.8 Sequencing of different chillers (generators for chilled water) .49
5.3.9 Control of Thermal Energy Storage (TES) charging. 51
5.3.10 Hydronic balancing cooling distribution (including contribution to
balancing to the emission side) . 52
5.4 Ventilation and air conditioning control .54
5.4.1 Supply air flow control at the room level.54
5.4.2 Room air temperature control by the ventilation system (all-air systems;
combination with static systems as cooling ceiling, radiators etc.) . 57
5.4.3 Coordination of room air temperature control by ventilation and by static
systems .58
5.4.4 Outside air flow control . 59
5.4.5 Air flow or pressure control at the air handler level . .60
5.4.6 Heat recovery control (icing protection) .64
5.4.7 Heat recovery control (prevention of overheating) .64
iii
ISO/DIS 16484-4:2023(E)
5.4.8 Free mechanical cooling .65
5.4.9 Supply air temperature control at the air handling unit level . 67
5.4.10 Humidity control . 69
5.5 Lighting control . 70
5.5.1 Occupancy control . 70
5.5.2 Light level/Daylight control (daylight harvesting).72
5.6 Blind control .74
5.6.1 Type 1 – Motorized operation of blind with manual control .74
5.6.2 Type 2 – Motorized operation of blind with automatic control . .75
5.6.3 Type 3 – Combined light/blind/HVAC control . 76
6 Functional elements .78
6.1 Sensor Functions . 78
6.1.1 Air quality measurement . 78
6.1.2 Air temperature measurement. 79
6.1.3 Dewpoint monitoring .80
6.1.4 Humidity measurement .81
6.1.5 Brightness measurement .82
6.1.6 Precipitation detection
...