Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3: Installation site and personal protection

This European Standard specifies the requirements for the safety of persons and property, provides guidance for the protection of the environment and establishes procedures for the operation, maintenance and repair of refrigerating systems and the recovery of refrigerants.
The term “refrigerating system” used in this European Standard includes heat pumps.
This Part 3 of the European Standard is applicable to the installation site (plant space and services). It specifies requirements on the site for safety, which may be needed because of, but not directly connected with, the refrigerating system and its ancillary components.
This standard applies:
a)   to refrigerating systems, stationary or mobile, of all sizes except to vehicle air conditioning systems covered by a specific product standard e.g. ISO 13043;
b)   to secondary cooling or heating systems;
c)   to the location of the refrigerating systems;
d)   to replaced parts and added components after adoption of this standard if they are not identical in function and in the capacity.
Systems using refrigerants other than those listed in of !EN 378 1:2016+A1:2020", Annex E are not covered by this standard.
This standard does not apply to goods in storage.
This standard is not applicable to refrigerating systems which were manufactured before the date of its publication as a European Standard except for extensions and modifications to the system which were implemented after publication.
This standard is applicable to new refrigerating systems, extensions or modifications of already existing systems, and for existing stationary systems, being transferred to and operated on another site.
This standard also applies in the case of the conversion of a system for another refrigerant type, in which case conformity with the relevant clauses of parts 1 to 4 of the standard shall be assessed.

Kälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen - Teil 3: Aufstellungsort und Schutz von Personen

Diese Europäische Norm legt die Anforderungen an die Sicherheit von Personen und Eigentum fest, liefert eine Anleitung in Hinblick auf den Schutz der Umwelt und enthält Vorgehensweisen für Betrieb, Instandhaltung und Instandsetzung von Kälteanlagen und die Rückgewinnung von Kältemitteln.
Die in dieser Europäischen Norm verwendete Benennung „Kälteanlage“ schließt Wärmepumpen mit ein.
Dieser Teil 3 der Europäischen Norm gilt für den Aufstellungsort (Aufstellungsraum und Versorgungseinrichtungen). Er legt die Anforderungen fest, die aufgrund der Kälteanlage und von deren Bauteilen für die Sicherheit vor Ort erforderlich sein können, die jedoch nicht in unmittelbarem Zusammenhang mit der Kälteanlage und deren Bauteilen stehen.
Diese Norm gilt für:
a)   stationäre und ortsveränderliche Kälteanlagen aller Größen, mit Ausnahme von Luftkonditioniersystemen in Kraftfahrzeugen, die von bestimmten Produktnormen wie z. B. ISO 13043 abgedeckt werden;
b)   indirekte Kühl- oder Heizsysteme;
c)   den Aufstellungsort dieser Kälteanlagen;
d)   nach der Annahme dieser Norm ersetzte Teile und hinzugefügte Bauteile, sofern sie nicht in Funktion und Leistung identisch sind.
Anlagen mit anderen als den in !EN 378 1:2016+A1:2020", Anhang E, aufgeführten Kältemitteln sind nicht Gegenstand dieser Norm.
Die vorliegende Norm gilt nicht für eingelagerte Güter.
Diese Norm gilt nicht für Kälteanlagen, die vor dem Datum ihrer Veröffentlichung als Europäische Norm hergestellt wurden, ausgenommen sind im Anschluss an die Veröffentlichung erfolgte Erweiterungen und Modifizierungen an der Anlage.
Die vorliegende Norm gilt für neue Kälteanlagen, Erweiterungen oder Modifizierungen bereits bestehender Anlagen sowie bestehende stationäre Anlagen, die an einen anderen Standort verbracht und dort betrieben werden.
Diese Norm gilt auch im Falle der Umstellung einer Anlage auf eine andere Art des Kältemittels; in diesem Fall muss die Übereinstimmung mit den zutreffenden Abschnitten von Teil 1 bis Teil 4 der Normenreihe beurteilt werden.

Systèmes frigorifiques et pompes à chaleur - Exigences de sécurité et d'environnement - Partie 3 : Installation in situ et protection des personnes

La présente Norme européenne spécifie les exigences relatives à la sécurité des personnes et des biens, fournit des recommandations pour la protection de l'environnement et établit des modes opératoires pour l'exploitation, la maintenance et la réparation des systèmes frigorifiques et la récupération des fluides frigorigènes.
Le terme « système frigorifique » utilisé dans la présente Norme européenne inclut les pompes à chaleur.
La présente Partie 3 de la Norme européenne est applicable à l'installation in situ (conception de l'implantation de l'usine et des services). Elle spécifie les exigences concernant le site pour des besoins de sécurité, qui peuvent être nécessaires en raison du système frigorifique et de ses équipements auxiliaires, mais sans qu'il y ait de lien direct avec ceux-ci.
La présente norme s'applique :
a)   aux systèmes frigorifiques, fixes ou mobiles, de toutes tailles, excepté les systèmes d'air conditionné embarqués couverts par une norme de produit spécifique telle que l'ISO 13043 ;
b)   aux systèmes secondaires de refroidissement ou de chauffage ;
c)   à l'emplacement des systèmes frigorifiques ;
d)   aux pièces remplacées et composants ajoutés après l'adoption de la présente norme, si leur fonction ou leur capacité n'est pas identique.
Les systèmes utilisant des fluides frigorigènes autres que ceux mentionnés dans
l'!EN 378-1:2016+A1:2020", Annexe E ne sont pas couverts par la présente norme.
La présente norme ne s'applique pas aux marchandises en stock.
La présente norme n'est pas applicable aux systèmes frigorifiques fabriqués avant sa date de publication en tant que Norme européenne, à l'exception des extensions et modifications du système mises en œuvre après la publication.
La présente norme s'applique aux systèmes frigorifiques neufs, aux extensions ou modifications de systèmes existants et, pour les systèmes fixes existants, aux systèmes transférés et exploités sur un autre site.
La présente norme s'applique également en cas de transformation d'un système pour un autre type de fluide frigorigène, auquel cas la conformité aux articles applicables des parties 1 à 4 de la norme doit être évaluée.

Hladilni sistemi in toplotne črpalke - Varnostnotehnične in okoljevarstvene zahteve - 3. del: Mesto postavitve in zaščita oseb

General Information

Status
Published
Publication Date
08-Nov-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Nov-2020
Due Date
10-Jan-2021
Completion Date
09-Nov-2020

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SLOVENSKI STANDARD
SIST EN 378-3:2017+A1:2021
01-januar-2021
Hladilni sistemi in toplotne črpalke - Varnostnotehnične in okoljevarstvene
zahteve - 3. del: Mesto postavitve in zaščita oseb

Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3:

Installation site and personal protection
Kälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante
Anforderungen - Teil 3: Aufstellungsort und Schutz von Personen

Systèmes frigorifiques et pompes à chaleur - Exigences de sécurité et d'environnement -

Partie 3 : Installation in situ et protection des personnes
Ta slovenski standard je istoveten z: EN 378-3:2016+A1:2020
ICS:
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
SIST EN 378-3:2017+A1:2021 en,fr,de

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

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SIST EN 378-3:2017+A1:2021
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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 27.080; 27.200 Supersedes EN 378-3:2016
English Version
Refrigerating systems and heat pumps - Safety and
environmental requirements - Part 3: Installation site and
personal protection

Systèmes frigorifiques et pompes à chaleur - Exigences Kälteanlagen und Wärmepumpen -

de sécurité et d'environnement - Partie 3 : Installation Sicherheitstechnische und umweltrelevante

in situ et protection des personnes Anforderungen - Teil 3: Aufstellungsort und Schutz von

Personen

This European Standard was approved by CEN on 3 September 2016 and includes Amendment 1 approved by CEN on 17 August

2020.

CEN 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 CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 378-3:2016+A1:2020 E

worldwide for CEN national Members.
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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

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

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

3 Terms, definitions and abbreviated terms ............................................................................................ 8

4 Location of refrigerating equipment ........................................................................................................ 8

4.1 !General ......................................................................................................................................................... 8

4.2 Refrigerating equipment located in the open air ................................................................................ 9

4.3 Refrigerating equipment located in a machinery room .................................................................... 9

4.4 !Refrigerating equipment located in the occupied space ............................................................ 9

4.5 Refrigerating equipment located in an unoccupied space not designated a

machinery room .............................................................................................................................................. 9

4.6 Refrigerating equipment located in a ventilated enclosure within an occupied space ...... 10

4.7 Piping duct or shaft ..................................................................................................................................... 10

5 Machinery rooms ......................................................................................................................................... 10

5.1 Access to machinery rooms ...................................................................................................................... 10

5.2 Venting from or through the machinery room .................................................................................. 10

5.3 Combustion equipment and air compressors.................................................................................... 10

5.4 Open flame ...................................................................................................................................................... 11

5.5 Storage ............................................................................................................................................................. 11

5.6 Remote emergency switch ........................................................................................................................ 11

5.7 Exterior openings of the machinery room .......................................................................................... 11

5.8 Piping and ducting ....................................................................................................................................... 11

5.9 Normal lighting ............................................................................................................................................. 11

5.10 Emergency lighting ...................................................................................................................................... 11

5.11 Dimensions and accessibility ................................................................................................................... 11

5.12 Doors, walls and ducts ................................................................................................................................ 12

5.12.1 Doors and openings ..................................................................................................................................... 12

5.12.2 Emergency ...................................................................................................................................................... 12

5.12.3 Walls, floor and ceiling ............................................................................................................................... 12

5.12.4 Service ducts .................................................................................................................................................. 12

5.12.5 Ventilation ducts .......................................................................................................................................... 12

5.13 Ventilation ...................................................................................................................................................... 13

5.13.1 General ............................................................................................................................................................. 13

5.13.2 Ventilation for normal operating conditions or when machinery room is occupied .......... 13

5.13.3 Emergency mechanical ventilation ....................................................................................................... 13

5.13.4 Required airflow for emergency mechanical ventilation .............................................................. 13

5.13.5 Mechanical ventilation openings ............................................................................................................ 13

5.14 Machinery rooms for groups A2L, A2, A3, B2L, B2 and B3 refrigerants ................................... 14

5.14.1 General ............................................................................................................................................................. 14

5.14.2 Location ........................................................................................................................................................... 14

5.14.3 Additional requirements for R-717 ....................................................................................................... 14

5.14.4 Maximum surface temperature .............................................................................................................. 15

6 Requirements for alternative provisions ............................................................................................ 15

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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)

6.1 General ............................................................................................................................................................. 15

6.2 Occupied space .............................................................................................................................................. 15

6.3 Ventilation ....................................................................................................................................................... 16

6.3.1 General ............................................................................................................................................................. 16

6.3.2 Dilution transfer openings (air transfer openings for dilution) for natural

convection ....................................................................................................................................................... 16

6.3.3 Mechanical ventilation ............................................................................................................................... 16

6.4 Safety shut off valves ................................................................................................................................... 17

6.4.1 General ............................................................................................................................................................. 17

6.4.2 Location ............................................................................................................................................................ 18

6.4.3 Design ............................................................................................................................................................... 18

7 Electrical installations ................................................................................................................................ 18

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

7.2 Main power supply ....................................................................................................................................... 18

7.3 Electrical equipment in machinery rooms with refrigerating systems containing

flammable refrigerants .............................................................................................................................. 18

8 Safety alarms .................................................................................................................................................. 18

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

8.2 Alarm system power .................................................................................................................................... 19

8.3 Alarm system warning ................................................................................................................................ 19

8.4 Additional alarm system requirements for R-717 systems with charges above

3 000 kg ............................................................................................................................................................ 19

9 Detectors .......................................................................................................................................................... 19

9.1 General ............................................................................................................................................................. 19

9.2 Location of detectors ................................................................................................................................... 19

9.3 Type and performance of detectors ....................................................................................................... 19

9.3.1 !General ....................................................................................................................................................... 19

9.3.2 Refrigerant detectors for A2, A2L, B2L (except for R-717), B2, A3 and B3 refrigerants .... 20

9.3.3 R-717 detectors ............................................................................................................................................. 20

9.4 Installation ...................................................................................................................................................... 21

10 Instruction manuals, notices and inspections.................................................................................... 21

10.1 Instruction manual....................................................................................................................................... 21

10.2 Warning notice .............................................................................................................................................. 21

10.3 Visual inspection of the site ...................................................................................................................... 21

10.4 Maintenance of the site ............................................................................................................................... 22

11 Heat sources and temporary high temperatures at the site ......................................................... 22

Annex A (informative) Personal protective equipment .............................................................................. 23

A.1 General requirements ................................................................................................................................. 23

A.1.1 Type of protective equipment .................................................................................................................. 23

A.1.2 Accessibility .................................................................................................................................................... 23

A.1.3 Location ............................................................................................................................................................ 23

A.1.4 Check and maintenance ............................................................................................................................. 23

A.1.5 Temperature .................................................................................................................................................. 23

A.1.6 Respirators...................................................................................................................................................... 23

A.2 Normal use ...................................................................................................................................................... 24

A.3 Emergency use ............................................................................................................................................... 24

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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)

A.3.1 General ............................................................................................................................................................. 24

A.3.2 Respiratory protective devices ............................................................................................................... 24

A.3.3 First aid equipment ..................................................................................................................................... 24

Bibliography ................................................................................................................................................................. 25

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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)
European foreword

This document (EN 378-3:2016+A1:2020) has been prepared by Technical Committee CEN/TC 182

“Refrigerating systems, safety and environmental requirements”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by April 2021, and conflicting national standards shall be

withdrawn at the latest by April 2021.

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 includes Amendment 1 approved by CEN on 17 August 2020.
This document supersedes !EN 378-3:2016".

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

EN 378 consists of the following parts under the general title “Refrigerating systems and heat pumps —

Safety and environmental requirements”:

— Part 1: Basic requirements, definitions, classification and selection criteria;

— Part 2: Design, construction, testing, marking and documentation;
— Part 3: Installation site and personal protection;
— Part 4: Operation, maintenance, repair and recovery.

The main changes in part 3 with respect to the previous edition are listed below:

— harmonisation as far as possible with ISO 5149:2014 and ISO 817:2014;

— clarification of when to use of 'special machinery room', and modify to “separate refrigeration

machinery room”;
— consideration of requirements for 2L refrigerants;

— inclusion of Clause 6 additional measures to support !EN 378-1:2016+A1:2020", C.3;

— modification of requirements for sprinkler systems.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)
Introduction
The introduction of EN 378-1 is applicable.
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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)
1 Scope

This European Standard specifies the requirements for the safety of persons and property, provides

guidance for the protection of the environment and establishes procedures for the operation,

maintenance and repair of refrigerating systems and the recovery of refrigerants.

The term “refrigerating system” used in this European Standard includes heat pumps.

This Part 3 of the European Standard is applicable to the installation site (plant space and services). It

specifies requirements on the site for safety, which may be needed because of, but not directly

connected with, the refrigerating system and its ancillary components.
This standard applies:

a) to refrigerating systems, stationary or mobile, of all sizes except to vehicle air conditioning systems

covered by a specific product standard e.g. ISO 13043;
b) to secondary cooling or heating systems;
c) to the location of the refrigerating systems;

d) to replaced parts and added components after adoption of this standard if they are not identical in

function and in the capacity.

Systems using refrigerants other than those listed in of !EN 378-1:2016+A1:2020", Annex E are

not covered by this standard.
This standard does not apply to goods in storage.

This standard is not applicable to refrigerating systems which were manufactured before the date of its

publication as a European Standard except for extensions and modifications to the system which were

implemented after publication.

This standard is applicable to new refrigerating systems, extensions or modifications of already existing

systems, and for existing stationary systems, being transferred to and operated on another site.

This standard also applies in the case of the conversion of a system for another refrigerant type, in

which case conformity with the relevant clauses of parts 1 to 4 of the standard shall be assessed.

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 378-1:2016+A1:2020, Refrigerating systems and heat pumps - Safety and environmental

requirements - Part 1: Basic requirements, definitions, classification and selection criteria"

EN 378-2:2016, Refrigerating systems and heat pumps — Safety and environmental requirements —

Part 2: Design, construction, testing, marking and documentation
EN 1363 (all parts), Fire resistance tests
EN 1364 (all parts), Fire resistance tests for non-load bearing elements
EN 1365 (all parts), Fire resistance tests for load bearing elements

EN 1366-1, Fire resistance tests for service installations — Part 1: Ventilation ducts

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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)

EN 1366-2, Fire resistance tests for service installations — Part 2: Fire dampers

EN 1507, Ventilation for buildings — Sheet metal air ducts with rectangular section — Requirements for

strength and leakage

EN 1634 (all parts), Fire resistance and smoke control tests for door and shutter assemblies, openable

windows and elements of building hardware

EN 12236, Ventilation for buildings — Ductwork hangers and supports — Requirements for strength

EN 12845, Fixed firefighting systems — Automatic sprinkler systems — Design, installation and

maintenance

EN 14624, Performance of portable leak detectors and of room monitors for halogenated refrigerants

EN 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres

(IEC 60079-10-1)

EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General

requirements (IEC 60204-1:2005)

EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)[eXtyles1]

EN ISO 13850, Safety of machinery — Emergency stop function — Principles for design (ISO 13850)

EN ISO 14122-2, Safety of machinery — Permanent means of access to machinery — Part 2: Working

platforms and walkways (ISO 14122-2)

ISO 13043, Road vehicles — Refrigerant systems used in mobile air conditioning systems (MAC) — Safety

requirements
ISO 817, Refrigerants — Designation and safety classification
IEC 60364, Low-voltage electrical installations
3 Terms, definitions and abbreviated terms

For the purposes of this document, the terms, definitions and abbreviated terms given in

!EN 378-1:2016+A1:2020", apply.
4 Location of refrigerating equipment
4.1 !General

Refrigerating equipment may be sited outside the building in the open air or in a machinery room or in

occupied areas or in unoccupied areas not designated as a machinery room.

NOTE 1 The refrigerating equipment can be contained in a ventilated enclosure provided by the manufacturer.

Requirements for this enclosure are given in EN 378-2:2016, 6.2.15.

The location of refrigeration systems with group A2L, A2, B2L, B2, A3, B3 refrigerants shall be assessed

with regard to flammability and classified according to the requirements of EN 60079-10-1 for the

hazardous zone.
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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)

NOTE 2 The assessment according to EN 60079-10-1 considering the LFL and type of release can conclude that

the hazardous area is of negligible extent."
4.2 Refrigerating equipment located in the open air

Refrigerating systems sited in the open air shall be positioned to avoid leaked refrigerant flowing into a

building or otherwise endangering people and property. The refrigerant shall not be able to flow into

any ventilation fresh air opening, doorway, trap door or similar opening in the event of a leak. Where a

shelter is provided for refrigerating equipment sited in the open air it shall have natural or forced

ventilation.

A room, where at least one of the longer walls is open to the outside air by means of louvres with 75 %

free area and covering at least 80 % of the wall area (or the equivalent if more than one wall is to

outside), is considered as being in the open air.

For refrigeration systems installed outside in a location where a release of refrigerant can stagnate e.g.

below ground, then the installation shall comply with the requirements for gas detection and

ventilation of machinery rooms (see 5.13, Clauses 8 and 9). For refrigerants of class 2L, 2 and 3

requirements regarding ignition sources in EN 378-2:2016, 6.2.14 shall apply where appropriate.

4.3 Refrigerating equipment located in a machinery room

When a machinery room is chosen for the location of the refrigerating equipment it shall meet the

requirements specified in 5.1 to 5.14.

A risk analysis based on the safety concept for the refrigerating system (as determined by the

manufacturer and including the charge and safety classification of the refrigerant used) shall be

conducted to determine whether it is necessary to place the refrigerating system in a separate

refrigeration machinery room.

NOTE 1 National regulations may set specific requirements for the use of separate refrigeration machinery

rooms.

For systems below ground using class 3 flammable refrigerants with a charge greater than ‘m ’, an

additional gas detector and audible/visual alarm shall be used and shall meet the requirements for

detectors in this standard.

NOTE 2 Additional requirements may be needed for refrigerating systems containing B2L, B2, B3, A2L, A2, and

A3 refrigerants as specified in 5.14.

NOTE 3 A housing which is sufficiently large for people to enter is a machinery room.

4.4 !Refrigerating equipment located in the occupied space

The refrigerant charge shall be as specified in EN 378-1:2016+A1:2020, Annex C for the access category

and location class of the equipment. Where the charge calculation is according to

EN 378-1:2016+A1:2020, C.3. then the alternative provisions listed in Clause 6 of this standard shall

apply. Where appropriate the installation in the occupied space shall comply with Clause 8 and Clause 9

of this standard."

4.5 Refrigerating equipment located in an unoccupied space not designated a machinery

room

Where compressors or pressure vessels are located in an unoccupied space which is sealed from any

occupied space the location shall be treated as a machinery room in accordance with Clause 5.

Where equipment (not including compressors and pressure vessels) containing non-permanent joints

is located in an unoccupied space which is sealed from any occupied space the requirements of Clause 5

shall be applied, but if mechanical ventilation is required according to 5.13, ventilation shall be from an

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SIST EN 378-3:2017+A1:2021
EN 378-3:2016+A1:2020 (E)

extractor hood positioned adjacent to the equipment and the ventilation rate shall be more than

0,05 m /s per ventilator. In the case of equipment subject to adverse conditions, for example severe

vibration or a corrosive atmosphere, the ventilation rate shall be more than 0,5 m /s per extr

...

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