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

2013-04-10 - Enquiry editing allocated to aclausse@cencenelec.eu * D142/C015: NWI approved by BT

Informationstechnik - Einrichtungen und Infrastrukturen von Rechenzentren -- Teil 2-3: Überwachung der Umgebung

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

La présente Norme Européenne aborde les aspects liés au contrôle environnemental dans les centres de traitement de données, selon les critères et classifications de “disponibilité”, “sécurité” et “validation d'efficacité énergétique » définis dans EN 50600-1. La présente Norme Européenne spécifie les exigences et les recommandations pour ce qui suit: a) contrôle des températures b) contrôle des mouvements de fluides c) contrôle de l’humidité d) contrôle des particules e) vibrations f) schéma d’implantation au sol et localisation des équipements g) pratiques pour économiser l’énergie h) sécurité physique des systèmes de contrôle environnemental Pour les problèmes relatifs à l'environnement électromagnétique, voir l'EN 50600-2-5.

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

Standard obravnava nadzor okolja v podatkovnih centrih na podlagi meril in klasifikacij za »dostopnost«, »varnost« in »omogočanje energetske učinkovitosti« v okviru standarda EN 50600-1. Ta evropski standard določa zahteve in priporočila za naslednje elemente: a) nadzor temperature, b) nadzor pretoka tekočin, c) nadzor relativne vlažnosti, d) nadzor delcev, e) vibracije, f) tloris in lokacije opreme, g) prakse, ki prispevajo k varčevanju z energijo, h) fizično varnost sistemov za nadzor okolja. Če vas zanimajo vprašanja, povezana z elektromagnetnim okoljem, si oglejte standard EN 50600-2-5.

General Information

Status
Published
Public Enquiry End Date
31-Oct-2013
Publication Date
23-Nov-2014
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Nov-2014
Due Date
17-Jan-2015
Completion Date
24-Nov-2014

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SLOVENSKI STANDARD
SIST EN 50600-2-3:2014
01-december-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:

Überwachung der Umgebung

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 50600-2-3:2014
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
35.110 Omreževanje Networking
SIST EN 50600-2-3:2014 en

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

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SIST EN 50600-2-3:2014
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SIST EN 50600-2-3:2014
EUROPEAN STANDARD EN 50600-2-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 35.020; 35.110; 35.160
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: Überwachung der Umgebung

environnemental

This European Standard was approved by CENELEC on 2014-09-01. 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, 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: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50600-2-3:2014 E
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SIST EN 50600-2-3:2014
EN 50600-2-3:2014 – 2 –
Contents Page

Foreword ........................................................................................................................................................... 4

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

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

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

3 Terms, definitions and abbreviations .................................................................................................. 7

3.1 Terms and definitions ............................................................................................................................... 7

3.2 Abbreviations ............................................................................................................................................ 9

4 Conformance .......................................................................................................................................... 9

5 Environmental control within data centres ......................................................................................... 9

5.1 General ..................................................................................................................................................... 9

5.2 Environmental control of data centre spaces ......................................................................................... 10

6 Availability ............................................................................................................................................ 14

6.1 General ................................................................................................................................................... 14

6.2 Design options by space ......................................................................................................................... 14

6.3 Environmental control system capacity planning with respect to expansion .......................................... 18

6.4 Environmental control system capacity planning with respect to resilience ........................................... 18

7 Physical security .................................................................................................................................. 18

7.1 General ................................................................................................................................................... 18

7.2 Access .................................................................................................................................................... 18

8 Energy efficiency enablement ............................................................................................................ 18

8.1 General ................................................................................................................................................... 18

8.2 Measurement of temperature ................................................................................................................. 19

8.3 Measurement of relative humidity ........................................................................................................... 20

8.4 Measurement of air pressure .................................................................................................................. 21

8.5 Coolant flow rates ................................................................................................................................... 21

8.6 Heat removal .......................................................................................................................................... 21

8.7 Outside air............................................................................................................................................... 22

8.8 Provision of alarms ................................................................................................................................. 22

8.9 Measurement requirements by Granularity Level................................................................................... 22

Annex A (normative) Distribution methodologies for temperature-controlled air in computer

room space ..................................................................................................................................................... 23

A.1 Cabinet or rack air flow management ................................................................................................ 23

A.2 Access floor air flow management ..................................................................................................... 23

A.3 Hot aisles/cold aisles ........................................................................................................................... 24

Annex B (informative) Control system concepts ......................................................................................... 26

B.1 General .................................................................................................................................................. 26

B.2 Control of exhaust temperature (return air) ...................................................................................... 26

B.3 Control of supply temperature (supply air) ....................................................................................... 26

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B.4 Combination of control of supply and exhaust temperature .......................................................... 26

B.5 Supply air relative humidity ................................................................................................................ 26

B.6 Proportion of outside air ..................................................................................................................... 26

Bibliography .................................................................................................................................................... 27

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SIST EN 50600-2-3:2014
EN 50600-2-3:2014 – 4 –
Foreword

This document (EN 50600-2-3:2014) 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) 2015-09-01
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2017-09-01
conflicting with this document have to
be withdrawn

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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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 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 carbon 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 and physical security. Effective management

and operational information is required to monitor achievement of the defined needs and objectives.

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, facility managers, ICT managers, project managers, main contractors;

2) architects, building designers and builders, system and installation designers;

3) facility and infrastructure integrators, suppliers of equipment;
4) installers, maintainers.

At the time of publication of this European Standard, the EN 50600 series will comprise the following

standards:

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

concepts;

— 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

distribution;

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

Environmental control;
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SIST EN 50600-2-3:2014
EN 50600-2-3:2014 – 6 –

— 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;

— EN 50600-2-6, Information technology — Data centre facilities and infrastructures — Part 2-6:

Management and operational information.

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.

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 50600-2-6 (in accordance with the requirements of EN 50600-1).

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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1 Scope

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.

This European Standard specifies requirements and recommendations for the following:

a) temperature control,
b) fluid movement control,
c) relative humidity control,
d) particulate control,
e) vibration,
f) floor layout and equipment locations,
g) energy saving practices,
h) physical security of environmental control systems.
For issues related to electromagnetic environment, see EN 50600-2-5.
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 50600-1, Information technology — Data centre facilities and infrastructures — Part 1: General concepts

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

systems
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.

3.1.1
adiabatic cooling

adiabatic cooling is a cooling system that is using the evaporative cooling principle to reduce the air

temperature
3.1.2
absolute humidity
quantity of water vapour in a given volume of air, expressed by mass
———————
1) Circulated for CENELEC enquiry.
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EN 50600-2-3:2014 – 8 –
3.1.3
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]
3.1.4
comfort environmental controls

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

given space
3.1.5
dew point

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

conditions
[SOURCE: IEC 60050-212:2010, 212-18-11]
3.1.6
exhaust air temperature

the temperature of the air leaving the data centre building or the temperature of the air leaving the heat load

3.1.7
fresh air cooling

cooling system that uses the external air to cool the data centre either directly or indirectly

3.1.8
heat load
thermal power that is produced
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
3.1.10
outdoor air temperature
temperature of the air measured outside of the data centre building
3.1.11
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]
3.1.12
return air temperature

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

3.1.13
supply air temperature
temperature of the air entering the IT equipment
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SIST EN 50600-2-3:2014
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3.1.14
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.

UPS Uninterruptible Power Supply
CRAC Computer Room Air Conditioning (Unit)
IT Information Technology
ITE Information Technology Equipment
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 4 and 5;

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

meets the requirements of Clause 6;

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

Granularity Level of Clause 7;
d) local regulations, including safety, shall be met.
5 Environmental control within data centres
5.1 General
5.1.1 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 primary and secondary

elements.

Primary elements relate to the mechanical generation of temperature controlled fluids. Secondary elements

relate to the distribution of fluids generated by the primary elements. See Table 1 for examples of these

elements.

Some environmental systems combine the function of primary and secondary elements.

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SIST EN 50600-2-3:2014
EN 50600-2-3:2014 – 10 –
Table 1 — Examples of Primary and Secondary Functional Elements
Area Fluid Functional Element(s)
Primary Water Water supply grid, chiller, pump(s)
Air Outside air intake, filter, heat exchanger
Secondary Water Pump(s), valve(s), pipe system, liquid cooled enclosures
Air Duct system, computer room air conditioning unit

It should be noted that a Class 1 environmental control system does not necessarily contain any of these

elements.
5.1.2 Requirements

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

technology, physical security and data centre availability.

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.

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.

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 filtration shall be considered.

In all spaces where there is 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 see EN 50600-2-5.

5.1.3 Recommendations

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

humidity can be tolerated in defined data centre spaces. It is recommended to use cooling units with

integrated vibration decoupling for all rotating parts (e.g. fan, compressor) or low vibration parts. If the

cooling units or other external components with rotating parts are not equipped with integrated vibration

decoupling the whole unit should be decoupled.
5.2 Environmental control of data centre spaces
5.2.1 Building entrance facilities
No specific requirements.
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5.2.2 Personnel entrance(s)
Comfort environmental controls shall be applied to this space.
5.2.3 Docking/loading bay(s)
No specific requirements.
5.2.4 Generator space(s) including fuel storage
5.2.4.1 Generator spaces

Temperature 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 the

temperature shall be maintained above 0 °C and should be above 10 °C.
Adequate ventilation shall be provided for combustion and for radiator cooling.

Where the manufacturer is not known at the time of design the maximum temperature shall be 35 °C.

Anti-condensation heating shall be provided for alternators and switchgear.

Temperature and the presence of particulates (smoke, carbon monoxide and fuel) shall be monitored. See

EN 50600-2-5 for further information regarding monitoring of smoke.

Heater elements in the generator engine may provide sufficient heat for this space, where this is not possible

thermostatically controlled heaters shall be applied.
5.2.4.2 Fuel storage systems

The fuel storage system shall be protected against continuous sub-zero ambient temperatures to avoid fuel

solidification.
The fuel storage systems shall be monitored for leakage.

NOTE The availability of generators can be adversely affected by cold (<10 °C) or poor quality fuel and can be

improved through the installation of crankcase heaters.
5.2.5 Transformer space(s)

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

accommodated unless the system has been de-rated for operation at higher ambient temperatures. Where

no information exists or where the equipment manufacturer is not specified the temperature shall be

maintained above 0 °C and should be above 10 °C.

The maximum ambient temperature shall not exceed the maximum temperature specified by the equipment

manufacturer unless the system has been de-rated for operation at higher ambient temperatures. Where the

manufacturer is not known at the time of design the maximum temperature shall be 35 °C.

Filtration against dust shall be provided, if required, in accordance with the instructions of the supplier of the

equipment to be accommodated.

Forced air cooling of the transformer should be considered at the design phase where this would represent

an improvement in transformer efficiency.
Anti-condensation heating shall be provided for switchgear.
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SIST EN 50600-2-3:2014
EN 50600-2-3:2014 – 12 –

Temperature and the presence of smoke particulates shall be monitored. See EN 50600-2-5 for further

information regarding monitoring of smoke.
5.2.6 Electrical distribution space(s)

Temperature 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 the

temperature shall be maintained above 0 °C and should be above 10 °C.
Natural ventilation shall be provided.

The maximum ambient temperature shall not exceed the maximum temperature specified by the supplier of

the equipment to be accommodated unless the system has been de-rated for operation at higher ambient

temperatures. Where the manufacturer is not known at the time of design the maximum temperature shall be

40 °C.
Anti-condensation heating shall be provided.

Temperature controlled air extraction shall be provided, where the facility’s redundancy so requires

ventilation shall be by redundant fans each rated to the maximum load expected. Temperature and relative

humidity shall be monitored.
5.2.7 Telecommunication spaces(s)

Temperature and relative humidity shall be maintained in accordance with the instructions of the supplier of

the equipment to be accommodated. Where this is not known in advance temperature shall be maintained

between 10 °C and 30 °C with relative humidity maintained between 20 % and 70 %.
Temperature and relative humidity shall be monitored.

Where the data centre is supported by a single telecommunications space, or by multiple, non-resilient

telecommunications spaces, the space(s) shall have a single path resilient environmental control system (for

examples see 6.2.5.3).
5.2.8 Main Distributor spaces(s)

If external to computer room space the requirements of 5.2.7 shall be applied; if contained within the

computer room space then the requirements of 5.2.9 shall be applied.
5.2.9 Computer room space(s) and associated testing space(s)

The computer room space is the most important space from an environmental control perspective.

An analysis examining the balance between tight environmental controls versus high performance energy

saving controls with reference to the type of IT equipment to be accommodated shall be performed by the

owner of the data centre. The results of this analysis shall be compared with the business model for the data

centre.

Environmental controls shall be applied that maintain the following parameters within limits defined by the

requirements of the analysis described above:
a) operating temperature;
b) relative humidity;
c) air quality:
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1) particulate content;
2) bacterial content;
3) gaseous contaminants.

The designer of the environmental control system shall assess the impact of the failure of the system on the

data centre infrastructure.
5.2.10 Electrical space(s)
See 5.2.15, if the electrical space contains UPS equipment.

Temperature 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 the

temperature shall be maintained above 0 °C and should be above 10 °C.
Natural ventilation shall be provided.

The maximum ambient temperature shall not exceed the maximum temperature specified by the supplier of

the equipment to be accommodated unless the system has been de-rated for operation at higher ambient

temperatures. Where the manufacturer is not known at the time of design the maximum temperature shall be

40 °C.
Anti-condensation heating shall be provided.
Temperature and relative humidity shall be monitored.
5.2.11 Mechanical space(s)
Temperature and relative humidity shall be monitored.

If the mechanical space accommodates electrical equipment then the requirements of 5.2.10 apply.

5.2.12 Control room space(s)
Comfort environmental controls shall be applied to this space.
5.2.13 Office space(s)
...

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