SIST EN 17969:2026

SLOVENSKI STANDARD
01-julij-2026
Stroji za zemeljska dela - Varnost - Sistemi za zaščito pred onesnaženjem
Earth-moving machinery - Safety - Contamination protective systems
Erdbaumaschinen - Sicherheit - Schutzbelüftungsanlagen
Engins de terrassement - Sécurité - Systèmes de protection contre les contaminations
Ta slovenski standard je istoveten z: EN 17969:2026
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17969
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2026
EUROPÄISCHE NORM
ICS 53.100
English Version
Earth-moving machinery - Safety - Contamination
protective systems
Engins de terrassement - Sécurité - Systèmes de Erdbaumaschinen - Sicherheit -
protection contre les contaminations Schutzbelüftungsanlagen
This European Standard was approved by CEN on 13 April 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17969:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 10
4 Safety requirements and/or protective/risk reduction measures . 10
4.1 General . 10
4.2 General requirements . 10
4.2.1 Requirements for the operator’s cab . 10
4.2.2 Requirements for providing breathing air . 10
4.2.3 Overpressure of the cab . 11
4.2.4 Information on operating condition of protective ventilation system . 12
4.2.5 Noise at the operator's station. 12
4.2.6 Visibility . 12
4.2.7 Vibration . 13
4.2.8 Access . 13
4.2.9 Maintenance . 13
4.2.10 Filter unit handling . 13
4.2.11 Ventilation system mounting . 13
4.2.12 Requirements for control devices . 13
4.2.13 Moving parts . 14
4.2.14 Protection against electrical hazards. 14
4.2.15 Electromagnetic compatibility . 15
4.3 Special provisions for machinery with particle filter units or gas filter units . 15
4.3.1 Common provisions . 15
4.3.2 Requirements for particle protective ventilation system . 16
4.3.3 Requirements for gas protective ventilation system . 16
4.4 Special provisions for machinery with breathing compressed air unit as protective
ventilation systems . 17
4.4.1 Air characteristics . 17
4.4.2 Pressure indicator. 18
4.4.3 Air bottles fixing . 18
4.4.4 Cylinder pressure control . 18
4.4.5 Protection of the components for breathing compressed air unit as protective
ventilation systems . 18
4.4.6 Protection of the fittings outside the operator station . 18
5 Verification of the safety requirements and/or protective/risk reduction measures
................................................................................................................................................................... 18
6 Information for use . 21
6.1 General . 21
6.2 Operator’s manual . 21
6.2.1 General . 21
6.2.2 Operator’s manual for operation, maintenance and application of the filters . 22
6.2.3 Information concerning airborne noise emission . 22
6.3 Marking . 23
6.3.1 Protective ventilation system . 23
6.3.2 Filters . 23
6.3.3 Contaminant filtration warning . 23
Annex A (informative) List of significant hazards . 24
Annex B (informative) Non-exhaustive list of possible configurations for contamination
protective system . 27
Annex C (informative) Cab overpressure vs relative wind speed . 30
Annex D (normative) Determination of the nominal airflow of the protective ventilation
system. 31
Annex E (normative)  Determination of the protection capacity of the gas filters . 32
E.1 General . 32
E.2 Test procedure . 32
Annex ZA (informative)  Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 38
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2023/1230 aimed to be covered . 41
Bibliography . 45

European foreword
This document (EN 17969:2026) has been prepared by Technical Committee CEN/TC 151 “Construction
equipment and building material machines - Safety”, 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 November 2026 and conflicting national standards shall
be withdrawn at the latest by November 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annexes ZA and ZB, which are an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, 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, Türkiye and the United
Kingdom.
Introduction
This document is a type C standard as stated in EN ISO 12100:2010.
This document is of relevance in particular for the following stakeholder groups representing the market
players with regard to machinery safety:
— contamination protective device manufacturers;
— health and safety bodies (regulators, accident prevention organizations, market surveillance etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers;
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance;
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate in the drafting
process of this document.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events
are covered are indicated in the scope of this document. When provisions of this type C standard are
different from those which are stated in type A or B standards, the provisions of this type C standard take
precedence over the provisions of the other standards, for machines that have been designed and built
according to the provisions of this type C standard.
When operating earth-moving machinery in contaminated areas, the operator can be exposed to
hazardous agents such as chemical agents in the form of dust, aerosols, gases or vapours or biological
agents in the form of aerosols. Protective ventilation systems for earth-moving machinery providing
protection against these hazardous agents can reduce operator exposure to airborne contaminants
present in contaminated areas, where the protection provided by a standard filtration system (e.g. as
required in EN 474-1:2022) is not sufficient.
The objective of this document is to improve the operator protection by using the protective ventilation
systems of earth-moving machinery used in contaminated areas. For this purpose, this document
specifies requirements, test procedures and the operator information to be provided, in particular with
regard to installation, use and maintenance operations.

1 Scope
This document is applicable to protective ventilation systems to provide breathing air to operator's
stations on earth-moving machinery used in contaminated areas. Its purpose is to limit the exposure of
the operator (driver) to hazardous agents when earth-moving machinery is used in contaminated areas.
This document describes requirements, test procedures and information to be provided by the
manufacturer of protective ventilation systems to provide breathing air to operator's stations on
earthmoving machinery used in contaminated areas.
This document gives requirements additional to the common safety requirements of EN 474-1:2022
“Earthmoving machinery - Safety - Part 1: General requirements” and to the machine specific parts of the
EN 474:2022 series.
This document does not repeat the requirements from the EN 474:2022 series but adds or replaces the
requirements as applicable for Earth-moving machinery.
This document does not cover:
— the safety requirements to be used for any specific application;
— the choice of the system for a specific application site;
— the filter performance or the relevant filtration class for any particular application;
— the choice of type of filter for a specific application;
— the cab performance requirement when in-use;
— the filter durability when in-use.
This document is not applicable to protective ventilation systems which are manufactured before the
date of its publication as an EN.
For the list of significant hazards, see informative Annex A.
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 474-1:2022, Earth-moving machinery — Safety — Part 1: General requirements
EN 474-5:2022, Earth-moving machinery — Safety — Part 5: Requirements for hydraulic excavators
EN 474-6:2022, Earth-moving machinery — Safety — Part 6: requirements for dumpers
EN 474-9:2022, Earth-moving machinery — Safety — Part 9: requirements for pipelayers
EN 474-10:2022, Earth-moving machinery — Safety — Part 10: requirements for trenchers
EN 474-12:2022, Earth-moving machinery — Safety — Part 12: requirements for cable excavators
EN 474-13:2022, Earth-moving machinery — Safety — Part 13: requirements for rollers
EN 1822-1:2019, High efficiency air filters (EPA, HEPA and ULPA) — Part 1: Classification, performance
testing, marking
EN 12021:2014, Respiratory equipment — Compressed gases for breathing apparatus
EN 12341:2023, Ambient air — Standard gravimetric measurement method for the determination of the
PM10 or PM2,5 mass concentration of suspended particulate matter
EN 13274-8:2002, Respiratory protective devices — Methods of test — Part 8: Determination of dolomite
dust clogging
EN 14387:2021, Respiratory protective devices — Gas filter(s) and combined filter(s) — Requirements,
testing, marking
EN 15695-1:2017, Agricultural tractors and self-propelled sprayers — Protection of the operator (driver)
against hazardous substances — Part 1: Cab classification, requirements and test procedures
EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
EN 60529:1991, Degrees of protection provided by enclosures (IP Code)
EN IEC 62990-2:2021, Workplace atmospheres — Part 2: Gas detectors — Selection, installation, use and
maintenance of detectors for toxic gases and vapours
EN ISO 4871:2009, Acoustics — Declaration and verification of noise emission values of machinery and
equipment (ISO 4871:1996)
EN ISO 10121-1:2014, Test method for assessing the performance of gas-phase air cleaning media and
devices for general ventilation — Part 1: Gas-phase air cleaning media (ISO 10121-1:2014)
EN ISO 13766-1:2018, Earth-moving and building construction machinery — Electromagnetic
compatibility (EMC) of machines with internal electrical power supply — Part 1: General EMC requirements
under typical electromagnetic environmental conditions (ISO 13766-1:2018)
EN ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2019)
EN ISO 19014-3:2018, Earth-moving machinery — Functional safety — Part 3: Environmental
performance and test requirements of electronic and electrical components used in safety-related parts of
the control system (ISO 19014-3:2018)
ISO 10263-4:2009, Earth-moving machinery — Operator enclosure environment — Part 4: Heating,
ventilating and air conditioning (HVAC) test method and performance

As impacted by EN 60529:1991/corrigendum May 1993, EN 60529:1991/A1:2000, EN 60529:1991/A2:2013,
EN 60529:1991/AC:2016-12 and EN 60529:1991/A2:2013/AC:2019-02.
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 6165:2022 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1.1
contaminated area
area where hazardous agent is present in the ambient air
3.1.2
hazardous agents
chemical agent in the form of dust, aerosol, vapour or gas, or biological agent in the form of aerosol, which
can expose an operator to a health risk
EXAMPLES Asbestos, crystalline silica dust, hydrogen sulphide, ammonia, bacterium.
[SOURCE: Directive 98/24/EC (chemical agent) and Directive 2000/54/EC (biological agent)]
3.1.3
aerosol
suspension in air of solid particles, liquid particles or solid and liquid particles having a negligible falling
velocity
3.1.4
dust
finely divided, airborne and sedimented solid particles
3.1.5
protective ventilation system
protective system providing breathable air comprising either a fan and a particle filter unit (3.1.7) or gas
filter unit (3.1.8), or a breathing compressed air unit (3.1.9)
Note 1 to entry: See informative Annex B.
3.1.6
prefilter
device to reduce the amount of particles before entering particle filter
Note 1 to entry: The prefilter efficiency is lower than the particle filter efficiency.
Note 2 to entry: The prefilter can be conducted as a mechanical device, e.g. cyclone, air precleaner or with a filter
material.
3.1.7
particle filter unit
air handling device to provide air with a reduced amount of dust and aerosol to the operator’s cab
Note 1 to entry: Chemical and biological aerosols can be filtered by particle filters.
3.1.8
gas filter unit
air handling device to provide air with a reduced amount of dust, aerosol, vapour and gas to the operator’s
cab
3.1.9
breathing compressed air unit
air handling device supplying breathable air independent of the atmosphere outside the cab and
consisting of:
— compressed air bottles, lines and fittings, or
— lines and fittings providing breathing air to the operator's station
3.1.10
filter housing
enclosure where gas- and/or particle filters are placed
3.1.11
ambient air
indicates the air of the area where the machine is used
3.1.12
monitoring device
stand-alone unit or integrated part in the machinery dash panel for monitoring and indicating the
operating status of the protective ventilation system and generating alarms
3.1.13
recirculation unit
air handling device which solely filters the air inside the cab without taking fresh air
Note 1 to entry: See informative Annex B.
3.1.14
overpressure
positive static differential pressure in the cab of the earth-moving machinery
Note 1 to entry: See informative Annex C.
3.1.15
filters/filter elements
pack of filtration media
3.1.16
breathing air
filtered ambient air or air from compressed air units, and filtered recirculating air
3.1.17
operator’s station
area on a ride-on machine from which an operator controls the functions of the machine
[SOURCE: EN 474-1:2022, 3.8]
3.1.18
operator’s cab
enclosure on a ride-on machine from which an operator controls the travel and work functions of the
machine
[SOURCE: EN 474-1:2022, 3.9]
3.2 Abbreviations
HVAC Heating, Ventilation and Air Conditioning
4 Safety requirements and/or protective/risk reduction measures
4.1 General
This document describes requirements, test procedures and information to be provided by the
manufacturer for protective ventilation systems to provide breathing air to operator's stations on
earthmoving machinery used in contaminated areas.
NOTE A filter’s performance level can depend on a risk assessment and national regulations.
4.2 General requirements
4.2.1 Requirements for the operator’s cab
4.2.1.1 Design of protective ventilation system
The units of the protective ventilation system placed in the operator’s station shall be free of sharp edges
or acute angles/corners so as to be able to comply with requirements of EN 474-1:2022, 4.3.1.5 and 4.14
when implemented in the operator’s station.
4.2.1.2 HVAC system
EN 474-1:2022, 4.3.2 applies with the following addition:
The operator's cab shall be equipped with a HVAC in accordance with ISO 10263-4:2009.
4.2.1.3 Doors and windows
Doors, windows, flaps and their locking devices shall be so designed that no hazards will be created to
the operator during opening under pressure, e.g. by abrupt movements.
4.2.1.4 Respiratory protective device
A place for keeping an appropriate respiratory protective device (depending on the kind of protective
ventilation systems) to rescue oneself (means of escape) shall be provided at the operator's cab and be
easily accessible.
4.2.2 Requirements for providing breathing air
4.2.2.1 Recirculating air
Consistent breathing air inlet and distribution shall be provided at the operator’s cab. Resuspension of
dust shall be avoided.
Air inside the operator’s station shall be filtered by a recirculation unit. The filters shall be classified at
least H13 according to the dust classes in EN 1822-1:2019.
NOTE 1 The filter class can depend on the application and on the country regulation.
NOTE 2 H13 filters are efficient for biological agents in the form of aerosols.
4.2.2.2 Recirculating air flow rate
The filtered recirculating airflow shall be at least 50 m /h.
4.2.2.3 Breathing air flow rate
For machinery with particle filter units or gas filter units
When a stand-alone recirculation device is used, then the protective ventilation system shall provide at
/h of filtered fresh air (see informative Annex B).
least 30 m
The air flow rate shall be measured in accordance with Annex D.
For machinery with breathing compressed air unit as protective ventilation systems
The air flow volume provided to the operator’s station by the compressed air bottles shall have a
minimum amount of 12 m per person per hour under all normal use operating conditions.
Air flow rate shall be measured according to Annex D.
Instead of measuring the volume flow of the breathing air provided, carbon dioxide (CO ) can
alternatively be measured by a device with an alarm threshold. The detector installed for CO
measurement shall be selected and installed in accordance with the requirement of EN IEC 62990-2:2021
and shall remain active even when the protective ventilation system is switched off. In the process, carbon
dioxide shall not exceed 0,18 % by vol. When this value is exceeded, the measuring device shall trigger a
visual and acoustic alarm.
The measuring points of the measuring devices shall not be located in an area that corresponds to the
position of the operator’s mouth and nose, so that neither the breathing air provided at the inlet nor the
exhalation air at the outlet are measured.
NOTE If necessary, the filament position centre point according to ISO 5006:2017 can provide orientation.
Malfunctions on measuring devices shall trigger an alarm by self-monitoring.
The acoustic alarms may be neutralized but the visual alarms should remain as long as the quality of the
breathing air is not satisfactory.
4.2.3 Overpressure of the cab
The system shall be capable of providing an overpressure in the operator’s cab between 100 Pa and
300 Pa.
NOTE 1 A means could be provided to prevent the overpressure.
NOTE 2 This limitation is applicable for the whole range of ventilation air flow, if relevant.
NOTE 3 For the determination of higher minimum overpressure of 100 Pa, refer to the document DGUV
Information 201-004 in bibliography.
The monitoring device shall indicate that a recirculation filter is fitted in the recirculation unit.
4.2.4 Information on operating condition of protective ventilation system
An information plate shall be fitted easily visible within the operator's station to communicate the
following information:
The system to provide breathing air shall be running while the openings (e.g. window(s), door(s)) of the
operator's station are closed!
Pictorials may alternatively be used.
4.2.5 Noise at the operator's station
4.2.5.1 Noise reduction
A protective ventilation system shall be so designed and constructed that risks resulting from the
emission of airborne noise are reduced to the lowest level, taking account of technical progress and the
availability of means of reducing noise, in particular at the source.
When designing a protective ventilation system, the available information and technical measures to
control noise at the source shall be taken into account.
NOTE Examples of noise reduction measures include:
— the selection of low noise components;
— the use of sound insulating covers and enclosures around noisy components;
— the placing of noisy components away from the normal operator’s position.
Other technical measures with similar or higher efficacy can be used by a manufacturer.
4.2.5.2 Noise emission measurement
EN 474-1:2022, 4.13.2 applies.
4.2.6 Visibility
Protective ventilation systems shall be so arranged that the operator has sufficient visibility from the
operator's station in relation to the travel and work areas of the machine.
The requirements for the operator's field of view shall comply with EN 474-1:2022, 4.8.1.
For hydraulic excavators, the requirement for the operator’s field of view shall comply with
EN 474-5:2022, 4.6.
For dumpers, the requirement for the operator’s field of view shall comply with EN 474-6:2022, 4.7.
For pipelayers, the requirement for the operator’s field of view shall comply with EN 474-9:2022, 4.5.
For trenchers, the requirement for the operator’s field of view shall comply with EN 474-10:2022, 4.5.5
and 4.6.
For cable excavators, the requirement for the operator’s field of view shall comply with EN 474-12:2022,
4.12.2.
For rollers, the requirement for the operator’s field of view shall comply with EN 474-13:2022, 4.5.
These requirements shall also be met if protective ventilation systems are installed outside of the cab on
the earth-moving machine.
4.2.7 Vibration
Protective ventilation systems and their fastening system on the earth-moving machine shall withstand
a vibration test as described in EN ISO 19014-3:2018, 5.6.
4.2.8 Access
EN 474-1:2022, 4.2.1 applies.
4.2.9 Maintenance
EN 474-1:2022, 4.22.1 and 4.22.2 applies.
4.2.10 Filter unit handling
The filter unit (e.g. particle filter unit, gas filter unit) shall be provided with measures for safe handling.
4.2.11 Ventilation system mounting
By mounting of protective ventilation systems:
— the access to other maintenance and control stations on earth-moving machinery shall not be
obstructed;
— the protective effect of protective structures such as roll-over, tip-over or falling-object protective
structures shall not be affected;
— the installation of a protective ventilation system shall meet the requirements of EN 474-1:2022,
4.2.1 and 4.3.2.3.
4.2.12 Requirements for control devices
4.2.12.1 Protective ventilation system control
The protective ventilation system shall start and stop automatically when the machine is switched into a
“ready to operate” mode, e.g. ignition on or main power on.
During operation, it shall be possible for the operator to start and stop the protective ventilation system
manually. In this case, the monitoring device shall give an acoustic and visual alarm.
Further operation of the protective ventilation system when the engine stopped shall be indicated by an
acoustic and visual alarm to the operator, e.g. in order to avoid discharge of the battery.
4.2.12.2 Overpressure control
A permanent indicator for the overpressure at the operator’s station shall be provided within the
operator’s field of view.
It can be a stand-alone unit or an integrated part of the dash panel of the construction machine, placed in
the operator’s front field of view.
The indicator shall at least comprise the range of 0 Pa to 400 Pa ± 3 %. Accurate to a 10 Pa resolution.
The upper and lower limited value for the overpressure shall be clearly identified or be permanently
marked on the display. The requirement is applicable for any operating position.
4.2.12.3 Pressure warning device
In addition to the indicators, a warning light and an acoustic warning device (horn) shall be provided
indicating a decrease of pressure below the lower limited value or an increase of pressure higher than
the permitted upper limited value to the operator. The warning device shall act with a delay time of less
than 20 s.
4.2.12.4 Warning of the activation of the protective ventilation system
A connection for a warning light on the machine shall be provided.
4.2.12.5 Filter set warning
The monitoring device shall indicate that a recirculation filter is fitted in the recirculation unit. If the filter
is not fitted in the unit, the monitoring device shall give an acoustic or visual alarm.
4.2.13 Moving parts
Hazards by shearing, crushing or drawing-in by movements of machine parts and equipment shall be
prevented by design. Access to dangerous moving parts shall be prevented in accordance with
EN ISO 13857:2019.
NOTE 1 This can be achieved by fitting fixed guards in accordance with EN ISO 3457:2008.
NOTE 2 For fans and rotary valves, fixed guards have been proven to be effective.
NOTE 3 EN ISO 12100:2010 sets out the general principles for the guarding of moving parts.
Fixed guards shall be installed when access is rarely necessary. Fixed guards that are to be removed as a
part of maintenance procedures, described in the operator's manual, shall be fixed by systems that can
be opened or removed only with tools. These guards fixing systems shall remain attached to the guards
or to the machinery when the guards are removed.
Where possible, fixed guards shall be incapable of remaining in place without their fixings.
4.2.14 Protection against electrical hazards
The requirements of EN 60204-1:2018 apply unless stated otherwise in this document.
The requirements regarding prevention of electric shock due to direct contact and the requirements
regarding protection against short circuits and overloading shall comply with EN 60204-1:2018.
The protection against electric shock due to indirect contact shall be ensured by automatic isolation
(circuit breaker or fuse).
Depending on the location/installation of electrical and electronic components, the following degrees of
protection are required:
— electronic controls, connectors in control circuits, multi-pin connectors and control switches external
to the cab shall have a minimum protection of IP 55 according to EN 60529:1991 ;
— components installed in the operator's cab or protected against the environment shall be designed
and executed to safeguard a correct function under expected and intended conditions.
Live parts in electrical enclosures shall not be accessible in accordance with EN 60204-1:2018.
NOTE Fire risk is not present where power circuits are protected against over current in accordance with
EN 60204-1:2018.
4.2.15 Electromagnetic compatibility
The ventilation protective system and its installation on a machine shall comply with the requirements
of electromagnetic compatibility as specified in EN ISO 13766-1:2018.
4.3 Special provisions for machinery with particle filter units or gas filter units
4.3.1 Common provisions
4.3.1.1 General
Particle filter units and gas filter units shall be arranged, designed and tested in such a way that the
permanent seal seat of filters in the casing is safeguarded in accordance with EN 15695-1:2017, Annex B.
4.3.1.2 Tightness of the air delivery and filtration system
Particle filter units and gas filter units shall comply with EN 15695-1:2017, Annex B.
4.3.1.3 Filters design
Filters shall be designed in such way that they cannot be installed in the reverse flow-through direction
and shall be readily replaceable without use of special tools and without any significant loss of captured
contaminant during removal.
4.3.1.4 Design of filter holders
Protective ventilation systems shall be designed and constructed in such a way that the filter
compartment can easily be cleaned as to remove remaining hazardous agents.
All surfaces in contact with hazardous dust, other than surfaces of disposable parts, shall be:
— smooth and have neither ridges nor crevices which could collect hazardous agents. The same applies
to their joinings;
— designed and constructed in such a way as to reduce projections, edges and recesses of assemblies
to a minimum;
— easily cleanable after removing easily detachable parts; the inside surfaces shall have curves with a
radius sufficient to allow thorough cleaning.
4.3.1.5 Air inlet design of filter units
The protective ventilation system shall be installed in such a way that exhaust gases cannot enter the
operator's cab.
4.3.1.6 Particle filter class and test method for ambient, recirculating and fresh air
The filters shall be classified at least H13 according to the dust classes in EN 1822-1:2019.
NOTE Higher filter classes can depend on the application and on the country regulation.
4.3.1.7 Clogging particle filter
The test procedure shall be that described in EN 13274-8:2002, 7.4.2, with the modification that three
filters shall be tested at nominal airflow of the protective ventilation system. The system shall be tested
in a dolomite DRB 4/15 dust concentration of (400 ± 100) mg/m until the product of dust concentration
and the testing time is 400 mg.h/m .
3 3
For example, the product may be 400 mg/m for 1 h or 300 mg/m for 1,33 h.
On completion of this test:
— the flow rate shall not have fallen below the minimum flow rate of 30 m /h; and
— the filter class requirement shall be satisfied after clogging test with dolomite powder.
This test procedure is only for particle filters and recirculation filters, not for prefilters and gas filters.
Other test standards can be used if equivalence is shown.
4.3.2 Requirements for particle protective ventilation system
4.3.2.1 Parts of the particle protective ventilation system
A particle protective ventilation system shall at least consist of the following parts:
a) air moving device, e.g. fan;
b) prefilter;
c) particle filter;
d) filter casing;
e) recirculation unit;
f) particle filter for recirculation unit;
g) monitoring device.
4.3.2.2 Filter arrangement
Filters shall be arranged in the direction of flow and in the following order:
— prefilter;
— particle filter.
4.3.3 Requirements for gas protective ventilation system
4.3.3.1 General
This document does not deal with the following filter types: HgP3, Ax, Sx as described in EN 14387:2021.
4.3.3.2 Parts of the gas protective ventilation system
A gas protective ventilation system shall at least consist of the following parts:
a) air moving device, e.g. fan;
b) prefilter;
c) particle filter;
d) gas filter;
e) filter casing;
f) recirculation unit;
g) particle filter for recirculation unit;
h) monitoring device.
4.3.3.3 Gas filter arrangement
Filters shall be arranged in the direction of flow and in the following order:
— prefilter;
— particle filter;
— gas filter.
4.3.3.4 Gas filter requirements
4.3.3.4.1 Types of gas filters
Gas filters units shall be classified according to EN 14387:2021, depending on the type of gas involved.
Types of filters are contained in one of the following types or combinations of them. If a filter is a
combination of types, it shall meet the requirements of each type separately.
Type A: For use against certain organic gases and vapours with a boiling point higher than 65 °C as
specified by the manufacturer.
Type B: For use against certain inorganic gases and vapours as specified by the manufacturer (excluding
carbon monoxide).
Type E: For use against sulphur dioxide and other acidic gases and vapours as specified by the
manufacturer.
Type K: For use against ammonia and organic ammonia derivatives as specified by the manufacturer.
4.3.3.4.2 Protection capacity of gas filters
The filters shall meet the appropriate requirements of Table E.1.
Testing shall be done in accordance with Annex E.
4.4 Special provisions for machinery with breathing compressed air unit as protective
ventilation systems
4.4.1 Air characteristics
The compressed air unit shall be designed to maintain the characteristics of the air in accordance with
EN 12021:2014.
4.4.2 Pressure indicator
An indicator for the actual pressure in the compressed air bottles shall be provided within the operator's
field of view. The measuring device for the air pressure shall be equipped with alarm threshold, triggering
an alarm when falling below the residual pressure of 20 bar (2 000 KPa).
NOTE The machinery may not be able to run as usual when operating in low oxygen atmosphere.
4.4.3 Air bottles fixing
Fixings shall be firmly attached to the machine.
Air bottles shall not hide the view of the operator as required in EN 474-1:2022, 4.8.
4.4.4 Cylinder pressure control
Breathing air compressors providing air to compressed air bottles shall indicate the maximum rated
cylinder pressure (inflated pressure). Exceeding the rated cylinder pressure of more than 10 % shall be
avoided by a safety valve.
4.4.5 Protection of the components for breathing compressed air unit as protective ventilation
systems
Parts of the breathing compressed air unit located outside the cab shall be protected against unauthorized
actuation.
4.4.6 Protection of the fittings outside the operator station
Fittings located outside the operator's station shall be protected against damages.
5 Verification of the safety requirements and/or protective/risk reduction
measures
Safety requirements and/or protective measures of Clause 4 of this document shall be verified according
to Table 1.
Table 1 sets out verification methods which shall be applied for each safety requirement in this document.
Where X(s) is indicated in the table, the corresponding verification method(s) shall be applied.
Table 1 shall be read in conjunction with the corresponding clauses.
Table 1 includes the following verification methods:
a) calculation: to establish that the requirements of this document have been met;
b) visual verification: to establish that something is present (e.g. a guard, a marking, a document);
c) measurement: to show that the required numerical values have been met (e.g. geometric dimensions,
safety distances,
...