Information technology - Data centre facilities and infrastructures - Part 2-3: Environmental control

This European Standard addresses environmental control within data centres based upon the criteria and classifications for "availability", "security" and "energy efficiency enablement" within EN 50600 1

Informationstechnik - Einrichtungen und Infrastrukturen von Rechenzentren - Teil 2-3: Regelung der Umgebungsbedingungen

Technologie de l'information - Installation et infrastructures des centres de traitement de données - Partie 2-3: Contrôle environnemental

Informacijska tehnologija - Naprave in infrastruktura podatkovnega centra - 2-3. del: Nadzor okolja

Ta dokument obravnava nadzor okolja v podatkovnih centrih na podlagi kriterijev in klasifikacij za »dostopnost«, »varnost« ter »omogočanje energetske učinkovitosti« v okviru standarda EN 50600-1.
Ta dokument določa zahteve in podaja priporočila za:
a) nadzor temperature;
b) nadzor pretoka tekočin;
c) nadzor relativne vlažnosti;
d) nadzor delcev;
e) vibracije;
f) fizično varnost sistemov za nadzor okolja.
Varnostne zahteve in zahteve za elektromagnetno združljivost (EMC) ne spadajo na področje uporabe tega evropskega standarda ter so obravnavane v drugih standardih in predpisih. Vendar so lahko informacije iz tega evropskega standarda v pomoč pri izpolnjevanju teh standardov in predpisov.

General Information

Status
Published
Publication Date
06-Jun-2019
Current Stage
6060 - Document made available
Due Date
07-Jun-2019
Completion Date
07-Jun-2019

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SLOVENSKI STANDARD
SIST EN 50600-2-3:2019
01-september-2019
Nadomešča:
SIST EN 50600-2-3:2014
Informacijska tehnologija - Naprave in infrastruktura podatkovnega centra - 2-3.
del: Nadzor okolja
Information technology - Data centre facilities and infrastructures - Part 2-3:
Environmental control

Informationstechnik - Einrichtungen und Infrastrukturen von Rechenzentren - Teil 2-3:

Regelung der Umgebungsbedingungen

Technologie de l'information - Installation et infrastructures des centres de traitement de

données - Partie 2-3: Contrôle environnemental
Ta slovenski standard je istoveten z: EN 50600-2-3:2019
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
35.110 Omreževanje Networking
SIST EN 50600-2-3:2019 en,fr

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

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SIST EN 50600-2-3:2019
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SIST EN 50600-2-3:2019
EUROPEAN STANDARD EN 50600-2-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 35.020; 35.110; 35.160 Supersedes EN 50600-2-3:2014
English Version
Information technology - Data centre facilities and infrastructures
- Part 2-3: Environmental control

Technologie de l'information - Installation et infrastructures Informationstechnik - Einrichtungen und Infrastrukturen von

des centres de traitement de données - Partie 2-3: Contrôle Rechenzentren - Teil 2-3: Regelung der

environnemental Umgebungsbedingungen

This European Standard was approved by CENELEC on 2019-04-29. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50600-2-3:2019 E
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
Contents

European foreword ...................................................................................................................................... 4

Introduction .................................................................................................................................................. 5

1 Scope .................................................................................................................................................. 8

2 Normative references........................................................................................................................ 8

3 Terms, definitions and abbreviations ............................................................................................. 9

3.1 Terms and definitions .......................................................................................................................... 9

3.2 Abbreviations ..................................................................................................................................... 10

4 Conformance ................................................................................................................................... 11

5 Environmental control within data centres .................................................................................. 11

5.1 General .............................................................................................................................................. 11

5.1.1 Design input ............................................................................................................ 11

5.1.2 Functional Elements ............................................................................................... 11

5.1.3 Requirements ......................................................................................................... 12

5.1.4 Recommendations .................................................................................................. 13

5.2 Environmental control of data centre spaces .................................................................................... 13

5.2.1 Building entrance facilities ...................................................................................... 13

5.2.2 Personnel entrance(s) ............................................................................................ 13

5.2.3 Docking/loading bay(s) ........................................................................................... 13

5.2.4 Generator space(s) including fuel storage ............................................................. 13

5.2.5 Transformer space(s) ............................................................................................. 13

5.2.6 Electrical distribution space(s) ................................................................................ 14

5.2.7 Telecommunication spaces(s) ................................................................................ 14

5.2.8 Main Distributor spaces(s) ...................................................................................... 14

5.2.9 Computer room space(s) and associated testing space(s) .................................... 14

5.2.10 Electrical space(s) .................................................................................................. 15

5.2.11 Mechanical space(s) ............................................................................................... 15

5.2.12 Control room space(s) ............................................................................................ 15

5.2.13 Office space(s)........................................................................................................ 15

5.2.14 Storage and holding space(s) ................................................................................. 15

5.2.15 Accommodation of UPS equipment........................................................................ 16

6 Availability ....................................................................................................................................... 16

6.1 General .............................................................................................................................................. 16

6.2 Availability Class design options ....................................................................................................... 16

6.2.1 General ................................................................................................................... 16

6.2.2 Computer room and telecom space(s) ................................................................... 17

6.2.3 UPS space .............................................................................................................. 23

6.3 Environmental control system capacity planning with respect to expansion ..................................... 24

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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)

6.4 Environmental control system capacity planning with respect to resilience ...................................... 24

7 Physical security ............................................................................................................................. 24

7.1 General .............................................................................................................................................. 24

7.2 Protection against unauthorized access ............................................................................................ 24

8 Energy efficiency enablement ....................................................................................................... 24

8.1 General .............................................................................................................................................. 24

8.2 Measurement of temperature ............................................................................................................ 25

8.2.1 External temperature .............................................................................................. 25

8.2.2 Computer room temperature .................................................................................. 25

8.3 Measurement of relative humidity ...................................................................................................... 26

8.3.1 External relative humidity ....................................................................................... 26

8.3.2 Computer room relative humidity............................................................................ 26

8.4 Measurement of air pressure ............................................................................................................. 26

8.5 Coolant flow rates .............................................................................................................................. 26

8.6 Heat removal ..................................................................................................................................... 26

8.7 Outside air.......................................................................................................................................... 26

Annex A (informative) Overview of the requirements for environmental conditions ....................... 27

Bibliography ............................................................................................................................................... 29

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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
European foreword

This document (EN 50600-2-3:2019) has been prepared by CLC/TC 215 “Electrotechnical aspects of

telecommunication equipment”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2020–04–29
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2022–04–29
conflicting with this document have to be
withdrawn
This document supersedes EN 50600-2-3:2014.
The following technical changes have been made:

a) Clause 5 on environmental control revised, e.g. requirements in 5.2 for environmental control in various

data centre spaces;

b) availability requirements in Clause 6 revised and aligned with EN 50600-1:2019 and EN 50600-2-

3:2019, in particular, enhanced Class 4 removed;
c) measurement requirements for granularity levels in Clause 8 revised;
d) Annex A and B removed;

e) new informative Annex A added to summarize requirements for environmental conditions;

f) minor technical and editorial improvements to the whole document.

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

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

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

the European Free Trade Association.
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
Introduction

The unrestricted access to internet-based information demanded by the information society has led to an

exponential growth of both internet traffic and the volume of stored/retrieved data. Data centres are housing

and supporting the information technology and network telecommunications equipment for data processing,

data storage and data transport. They are required both by network operators (delivering those services to

customer premises) and by enterprises within those customer premises.

Data centres usually need to provide modular, scalable and flexible facilities and infrastructures to easily

accommodate the rapidly changing requirements of the market. In addition, energy consumption of data

centres has become critical both from an environmental point of view (reduction of environmental footprint)

and with respect to economical considerations (cost of energy) for the data centre operator.

The implementation of data centres varies in terms of:
a) purpose (enterprise, co-location, co-hosting or network operator facilities);
b) security level;
c) physical size;
d) accommodation (mobile, temporary and permanent constructions).

The needs of data centres also vary in terms of availability of service, the provision of security and the

objectives for energy efficiency. These needs and objectives influence the design of data centres in terms of

building construction, power distribution, environmental control, telecommunications cabling and physical

security as well as the operation of the data centre. Effective management and operational information is

required to monitor achievement of the defined needs and objectives.

Recognizing the substantial resource consumption, particularly of energy, of larger data centres, it is also

important to provide tools for the assessment of that consumption both in terms of overall value and of

source mix and to provide Key Performance Indicators (KPIs) to evaluate trends and drive performance

improvements.

At the time of publication of this European Standard, EN 50600 series is designed as a framework of

standards and technical reports covering the design, the operation and management as well as the key

performance indicators for energy efficient operation of the data centre.
The EN 50600-2 series defines the requirements for the data centre design.

The EN 50600-3 series defines the requirements for the operation and the management of the data centre.

The EN 50600-4 series defines the key performance indicators for the data centre.

The CLC/TR 50600-99-X Technical Reports cover recommended practices and guidance for specific topics

around data centre operation and design.

This series of European Standards specifies requirements and recommendations to support the various

parties involved in the design, planning, procurement, integration, installation, operation and maintenance of

facilities and infrastructures within data centres. These parties include:

1) owners, operators, facility managers, IT managers, project managers, main contractors;

2) consulting engineers, architects, building designers and builders, system and installation designers,

auditors, test and commissioning agents;
3) facility and infrastructure integrators, suppliers of equipment;
4) installers, maintainers.

At the time of publication of this European Standard, the EN 50600-2 series comprises the following

standards:
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)

EN 50600-2-1, Information technology — Data centre facilities and infrastructures — Part 2-1: Building

construction;

EN 50600-2-2, Information technology — Data centre facilities and infrastructures — Part 2-2: Power supply

and distribution;

EN 50600-2-3, Information technology — Data centre facilities and infrastructures — Part 2-3: Environmental

control;

EN 50600-2-4, Information technology — Data centre facilities and infrastructures — Part 2-4:

Telecommunications cabling infrastructure;

EN 50600-2-5, Information technology — Data centre facilities and infrastructures — Part 2-5: Security

systems;

The inter-relationship of the standards within the EN 50600 series is shown in Figure 1.

Figure 1 — Schematic relationship between the EN 50600 standards

EN 50600-2-X standards specify requirements and recommendations for particular facilities and

infrastructures to support the relevant classification for “availability”, “physical security” and “energy efficiency

enablement” selected from EN 50600-1.

EN 50600-3-X documents specify requirements and recommendations for data centre operations, processes

and management.

EN 50600-4-X documents specify requirements and recommendations for key performance indicators (KPIs)

used to assess and improve the resource usage efficiency and effectiveness, respectively, of a data centre.

This European Standard addresses the environmental control facilities and infrastructure within data centres

together with the interfaces for monitoring the performance of those facilities and infrastructures in line with

EN 50600-3-1 (in accordance with the requirements of EN 50600-1).

This European Standard is intended for use by and collaboration between architects, building designers and

builders, system and installation designers.
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)

This series of European Standards does not address the selection of information technology and network

telecommunications equipment, software and associated configuration issues.
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
1 Scope

This document addresses environmental control within data centres based upon the criteria and

classifications for “availability”, “security” and “energy efficiency enablement” within EN 50600-1.

This document specifies requirements and recommendations for the following:
a) temperature control;
b) fluid movement control;
c) relative humidity control;
d) particulate control;
e) vibration;
f) physical security of environmental control systems.

Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this European

Standard and are covered by other standards and regulations. However, information given in this European

Standard may be of assistance in meeting these standards and regulations.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes

requirements 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 50600-1, Information technology - Data centre facilities and infrastructures - Part 1: General concepts

EN 50600-2-2:2019, Information technology - Data centre facilities and infrastructures - Part 2-2: Power

supply and distribution

EN 50600-2-5, Information technology - Data centre facilities and infrastructures - Part 2-5: Security systems

CLC/TR 50600-99-1, Information technology - Data centre facilities and infrastructures - Part 99-1:

Recommended practices for energy management

EN 61439-1, Low-voltage switchgear and controlgear assemblies - Part 1: General rules

EN 62040-3, Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test

requirements

EN ISO 14644-8, Cleanrooms and associated controlled environments - Part 8: Classification of air

cleanliness by chemical concentration (ACC) (ISO 14644-8)

EN ISO 16890-1:2016, Air filters for general ventilation - Part 1: Technical specifications, requirements and

classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)

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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions in EN 50600-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
access floor

system consisting of completely removable and interchangeable floor panels that are supported on

adjustable pedestals connected by stringers to allow the area beneath the floor to be used by building

services
Note 1 to entry: Also known as raised floor.
[SOURCE: EN 50600-2-1:2014, 3.1.1 – modified: added note 1 to entry]
3.1.2
adiabatic cooling

reducing the temperature of a given medium (usually air) using the principle of evaporative cooling

3.1.3
comfort environmental controls

controls which produce an environment which is appropriate for the effective performance of personnel in a

given space
3.1.4
dew point

temperature at which the water vapour in a gas begins to deposit as a liquid or ice, under standardized

conditions
3.1.5
direct fresh air cooling

cooling system that uses the external air that might be filtered to cool the IT equipment in the data centre

3.1.6
exhaust air temperature
temperature of the air leaving the data centre building
3.1.7
heat load
thermal power that is produced
3.1.8
indirect fresh air cooling

cooling system that uses the external air to cool the data centre. The external air is passed through a heat

exchanger to separate the external from the internal air which passes by the IT equipment

3.1.9
information technology equipment

equipment providing data storage, processing and transport services together with equipment dedicated to

providing direct connection to core and/or access networks
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
3.1.10
inlet air temperature
temperature of the (cold) air entering the rack or IT equipment
3.1.11
outdoor air temperature
temperature of the air measured outside of the data centre building
3.1.12
outlet air temperature
temperature of the (warm) air leaving the rack or IT equipment
3.1.13
relative humidity

ratio, expressed as a percentage, of the vapour pressure of water vapour in moist air to the saturation vapour

pressure with respect to water or ice at the same temperature
[SOURCE: IEC 60050-705:1995, 705-05-09]
3.1.14
return air temperature

temperature of the (warm) air re-entering the environmental control system e.g. the air handling unit

3.1.15
supply air temperature

temperature of the (cold) air leaving the environmental control system e.g. the air handling unit

3.1.16
ventilation

supply of air motion in a space by circulation or by moving air through the space

Note 1 to entry: Ventilation can be produced by any combination of natural or mechanical supply and exhaust.

Note 2 to entry: Such systems may include partial treatment such as heating, relative humidity control, filtering or

purification, and, in some cases, evaporative cooling.
3.2 Abbreviations

For the purposes of this document, the abbreviations given in EN 50600-1 and the following apply.

AHU Air Handling Unit
CRAC Computer Room Air Conditioning (Unit)
CRAH Computer Room Air Handler units
DRUPS Dynamic Rotary Uninterruptible Power System
IT Information Technology
ITE Information Technology Equipment
UPS Uninterruptible Power System
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
4 Conformance
For a data centre to conform to this European Standard:

a) it shall feature an environmental control solution that meets the requirements of Clauses 5 and 6;

b) it shall feature an approach to physical security in relation to the environmental control solution that

meets the requirements of Clause 7;

c) it shall feature an energy efficiency enablement solution that meets the requirements of the relevant

Granularity Level of Clause 8;
d) local regulations, including safety, shall be met.

The required Class of the Environmental Control system of a data centre is based on the required Availability

Class of the data centre.
5 Environmental control within data centres
5.1 General
5.1.1 Design input

Power supply and distribution and environmental control are important primary facilities and infrastructures of

a data centre and have inter-related design aspects (see Figure 2):
a) power supplied to IT equipment which is converted to heat output;
b) power supplied to the environmental control system to remove the heat output.
Figure 2 – Logical representation of environmental control of data centre spaces
5.1.2 Functional Elements

The environmental control system is one of the most important parts of the data centre infrastructure.

Excessive variations of temperature or relative humidity can directly affect the functional capability of the

data centre and its infrastructures.

The functional elements of the environmental control system are divided into supply and distribution

elements. The division of environmental control systems into supply and distribution reflects energy

efficiency where data centres use multiple cooling sources in various combinations (e.g. cold water from

public grids, non- dedicated central cooling plants, geothermal systems, rivers, and compressor systems).

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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)

Supply elements relate to the generation of temperature controlled fluids. Distribution elements relate to the

distribution of fluids generated by the supply elements. Distribution elements are differentiated in devices

(units) and paths. See Table 1 for examples of these elements.

It should be noted that for environmental control systems the electrical energy flow is into the system and the

thermal flow is from within the controlled environment outwards to the uncontrolled environment (exhausted

from the building).

Some environmental systems combine the function of supply and distribution elements.

Table 1 — Examples of supply and distribution elements
Area Fluid Functional Element(s)
Device / Functional Path / Functional
Element Element
Supply Water/Refrigerant External water supply, Pipe System
chiller, pump(s),
condensing unit
Air Outside air intake, filter(s), Duct/Plenum System
heat exchanger
Distribution Water/Refrigerant Pump(s), heat exchanger, Pipe System
CRAH
Air CRAC, louvres, AHU (Air Duct/Plenum System
Handling Unit)
5.1.3 Requirements

The approach taken for the design of the environmental control system shall take into account available

technology, physical security, data centre availability, maintenance, future extension (continuity of service)

and operations.

The design of the environmental control system and the selection and installation of functional elements shall

take into consideration the effect of vibration on the data centre spaces.

Physical data centre location and external conditions (minimum, median and maximum external temperature

and humidity rate) have to be taken into account for the selection of the functional elements.

The design of the environmental control system and the selection and installation of functional elements shall

take into consideration the effect of friction and/or obstruction in the pathways for temperature controlled

fluids. Operational controls shall be provided to ensure no degradation of fluid flow due to changes in the

pathways (see EN 50600-3-1).

During the design phase the requirement for the number of air changes per unit time and air pressure shall

be established.
In all data centre spaces the requirements for air quality shall be considered.

In all spaces with a risk of damage to static-sensitive equipment from electro-static discharge the relative

humidity shall be maintained in accordance with the instructions of the supplier of the equipment to be

accommodated. Where no information exists or where the equipment manufacturer is not specified, a

minimum dew point of 5,5 °C shall be maintained.

Where direct fresh air cooling solutions are chosen the requirements analysis and the resulting methodology

of monitoring and control is of prime importance. In these circumstances particular consideration shall be

given to the control of contaminants.

For guidance on the ventilation requirements of activated gaseous suppression systems that have been

discharged see EN 50600-2-5.
An overview of the requirements on environmental conditions is given in Annex A.
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SIST EN 50600-2-3:2019
EN 50600-2-3:2019 (E)
5.1.4 Recommendations

Opportunities for reductions in energy consumption exist where wider tolerances of temperature and relative

humidity can be accepted in defined data centre spaces (see CLC/TR 50600-99-1).

Clause 8 contains requirements for the measurement of certain parameters with the aim to provide insight,

the ability to analyse and ultimately to improve energy efficiency.

Devices of the environmental control system with integrated vibration decoupling for all rotating parts (e.g.

fan, compressor) or low vibration parts should be selected.
Where devices of the environmental control system or other externa
...

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