FprEN 15027

SLOVENSKI STANDARD
01-februar-2024
Oprema za prenosne stenske in žične žage za delovišča - Varnost
Transportable wall saw and wire saw equipment for job site - Safety
Transportable Wand- und Seilsägen für den Baustelleneinsatz - Sicherheit
Scies murales et scies à fil transportables de chantier - Sécurité
Ta slovenski standard je istoveten z: prEN 15027
ICS:
25.080.60 Strojne žage Sawing machines
91.220 Gradbena oprema Construction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 15027
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2023
ICS Will supersede EN 15027:2007+A1:2009
English Version
Transportable wall saw and wire saw equipment for job
site - Safety
Scies murales et scies à fil transportables de chantier - Transportable Wand- und Seilsägen für den
Sécurité Baustelleneinsatz - Sicherheit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 151.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15027:2023 E
worldwide for CEN national Members.

Contents Page
European Foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Safety requirements and/or measures . 13
4.1 General . 13
4.2 Mechanical hazard . 13
4.2.1 General . 13
4.2.2 Protection against moving parts . 13
4.2.3 Stability . 14
4.2.4 Transport and handling . 14
4.2.5 Fixing of the cutting-off wheel . 14
4.2.6 Combustion engine-starting device . 15
4.2.7 Guiding systems . 15
4.2.8 Control devices . 15
4.2.9 Failure of the power supply . 16
4.3 Electrical hazards (wire saws) . 17
4.4 Thermal hazards . 17
4.4.1 General . 17
4.4.2 Test method . 17
4.5 Exhaust fumes (internal combustion engines machines) . 17
4.6 Hydraulic and pneumatic installations . 17
4.6.1 Hydraulic installations . 17
4.6.2 Pneumatic installations . 17
4.6.3 Hoses and pipes under pressure . 18
4.7 Fluid containers . 18
4.8 Protection against water splashes and dust emissions . 18
4.9 Rotational or cutting speed . 18
4.10 Noise . 19
4.10.1 Noise reduction at the design stage . 19
4.10.2 Noise emission measurement, declaration and verification procedures . 19
4.11 Maintenance . 19
4.12 Ergonomics . 19
5 Verification of safety requirements and/or protective/risk reduction measures . 20
Table 2 — Means of verification of the safety requirements and/or measures . 20
6 Information for use . 22
6.1 General . 22
6.2 Marking . 22
6.2.1 Regular marking. 22
6.2.2 Warnings . 23
6.3 Accompanying documents . 23
6.3.1 Instruction handbook . 23
prEN 15027:2022 (E)
6.3.2 Description of the machine . 23
6.3.3 Instructions for transport, handling and storage of the machine and its dismountable
parts . 23
6.3.4 Instructions for the installation and use of the machine . 24
6.3.5 Maintenance instructions . 25
Annex A (informative) List of significant hazards . 26
Annex B (normative) Noise test code for wall saws and wire saws - accuracy grade 2 . 28
B.1 General . 28
B.2 Sound power level determination . 28
B.2.1 General . 28
The sound power level shall be measured according to EN ISO 3744:2010, where the acoustic
environment, instrumentation, quantities to be measured, quantities to be
determined, and the measurement procedure are specified. . 28
B.2.2 Wall saws . 29
B.2.3 Wire saws . 30
B.3 Emission sound pressure level determination . 30
B.4 Installation and mounting conditions of wall saws during noise tests . 31
B.5 Installation and mounting the wire saws during noise test . 31
B.6 Operating conditions for wall saws . 32
B.7 Operating conditions for wire saws . 32
B.8 Declaration and verification of noise emission values . 33
Annex C (normative) Requirements for cutting-off wheel and wire guards . 34
C.1 General . 34
C.2 Tool guards for wall saws . 34
C.3 Tool guard for wire saws . 35
Annex D (informative) Safety signs . 37
Figure D.1 — “Refer to instruction manual/booklet” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M002) . 37
Figure D.2 —“Caution, risk of cutting” . 37
Figure D.3 — “Wear ear protection” (see EN ISO 7010:2020, Register No. EN ISO 7010-M003)
............................................................................................................................................................................. 37
Figure D.4 — “Wear eye protection” (see EN ISO 7010:2020, Register No. EN ISO 7010-M004)
............................................................................................................................................................................. 37
Figure D.5 — “General warning sign” (see EN ISO 7010:2020, Register No.
EN ISO 7010-W001) . 38
Figure D.6 — “Wear protective gloves” (see EN ISO 7010:2020, Register No.
EN ISO 7010-M009) . 38
Annex E (normative) Verification of surface temperature . 39
E.1 Test equipment . 39
E.2 Test method . 39
prEN 15027:2022 (E)
E.3 Test acceptance . 39
Annex F (informative) Examples for working areas and dangerous areas . 40
F.1 Wall saws . 40
F.2 Wire saws . 41
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 45
Table ZA.1 — Correspondence between this European Standard and Annex I of
Directive 2006/42/EC . 45
Bibliography. 48

prEN 15027:2022 (E)
European Foreword
This document (prEN 15027:2022) 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 document is currently submitted to the Formal Vote.
This document will supersede EN 15027:2007+A1:2009.
In comparison with the previous edition, the following technical modifications have been made:
a) normative references revised and updated;
b) delimitation to EN IEC 62841-3-7:2021 implemented;
c) terms and definitions revised and updated;
d) safety requirements revised and updated;
e) requirements for warnings;
f) requirements for Information for use;
g) requirements for operator's instructions;
h) requirements for noise test code;
i) figures and safety signs updated;
j) list of significant hazards revised and updated.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA which is 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.
prEN 15027:2022 (E)
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:
— machine manufacturers (small, medium and large enterprises);
— 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 (small, medium and large enterprises);
— machine users/employees (e. g. trade unions, organizations for people with special needs);
— service providers, e. g. for maintenance (small, medium and large enterprises);
— consumers (in the case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at 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 requirements of this type-C standard are different from those which are stated in type-A or type-B
standards, the requirements of this type-C standard take precedence over the requirements of the other
standards for machines that have been designed and built according to the requirements of this type-C
standard.
prEN 15027:2022 (E)
1 Scope
The global description “wall saw and wire saw equipment” contains two differing types of machines for
use in the construction industry, and both used to make cuts on walls, ceilings and floors composed of
mineral construction materials and/or composite materials. The many different cutting tasks and choice
of operating method determine the type of machine to be used for each application.
The machines are therefore split into the following two principal classifications:
— wall saws - exclusively rail guided and remote-controlled - transportable;
— wire saws - remote-controlled - transportable.
The machines are intended for the use of diamond or similar superabrasive tools. The types of cutting
tools used in conjunction with the machines as described above fall within the design and use parameters
supplied by the manufacturer.
Wall saws are designed for use with rotating cutting-off wheels for wet and/or dry cutting.
Wire saws are designed for use with continuously running cutting-off wires for wet and/or dry cutting.
Machines covered by this standard can be powered by: internal combustion engine, electro-hydraulic
drive or internal combustion engine-hydraulic drive. Wire saws can also be powered by electric motor.
Wall saws powered by electric motors are covered by EN IEC 62841-3-7:2021.
This document deals with all significant hazards, hazardous situations and hazardous events relevant to
wall saws and wire saws machinery, when they are used as intended and under conditions of misuse
which are reasonably foreseeable by the manufacturer (see Annex A).
This document specifies the appropriate technical measures to eliminate or reduce risks arising from the
significant hazards during the lifetime of the machinery as described in EN ISO 12100:2010, 5.4.
For special applications, for example, when working in potentially explosive atmospheres, additional
safety requirements is necessary which are not covered by this standard.
This document does not apply to wire saws intended for quarrying and stationary machining of natural
stone as covered by EN 15163-2:2022.
This document does not apply to transportable wall saw and wire saw equipment for job site
manufactured before the date of its publication.
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 573-3:2019, Aluminium and aluminium alloys — Chemical composition and form of wrought products
— Part 3: Chemical composition and form of products
EN 10111:2008, Continuously hot-rolled low carbon steel sheet and strip for cold forming — Technical
delivery conditions
EN 13236:2019, Safety requirements for superabrasive products
EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
prEN 15027:2022 (E)
EN IEC 62841-3-7:2021, Electric motor-operated hand-held tools, transportable tools and lawn and garden
machinery — Safety — Part 3-7: Particular requirements for transportable wall saws (IEC 62841-3-7:2020)
EN ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise
sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane
(ISO 3744:2010)
EN ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their
components (ISO 4413:2010)
EN ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their
components (ISO 4414:2010)
EN ISO 4871:2009, Acoustics — Declaration and verification of noise emission values of machinery and
equipment (ISO 4871:1996)
EN ISO 6603-1:2000, Plastics — Determination of puncture impact behaviour of rigid plastics — Part 1:
Non-instrumented impact testing (ISO 6603-1:2000)
EN ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions in an essentially free field over a
reflecting plane with negligible environmental corrections (ISO 11201:2010)
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human
responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)
prEN ISO 13849-1:2021, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO/DIS 13849-1:2021)
EN ISO 13850:2015, Safety of machinery — Emergency stop function — Principles for design
(ISO 13850:2015)
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 14120:2015, Safety of machinery — Guards — General requirements for the design and
construction of fixed and movable guards (ISO 14120:2015)
EN ISO 18752:2022, Rubber hoses and hose assemblies — Wire- or textile-reinforced single-pressure types
for hydraulic applications — Specification (ISO 18752:2022)
prEN 15027:2022 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
wall saw
transportable machine utilising a cutting-off wheel, for sawing primarily on walls, floors and ceilings,
powered by an integral or an external power source and operated by remote control
Note 1 to entry: The components of a wall saw are shown in Figure 1.
3.2
wire saw
transportable machine utilising a cutting-off wire, for sawing primarily on walls, floors and ceilings,
powered by an integral or an external power source and operated by remote control
Note 1 to entry: The components of a wire saw are shown in Figure 2.
3.3
components of wall saws
see Figure 1
prEN 15027:2022 (E)
Key
1 w unit 8 pth control device
2 ive motor hydraulic 9 ower source
3 tting-off wheel guard 10 ower transmission
4 ack guiding system 11 ol mounting device
5 ounting devices 12 tting-off wheel
6 mote control system 13 olant supply
7 ed system
Figure 1 — Components of a wall saw
3.3.1
saw unit
part of the machine incorporating the mounting device for the cutting-off wheel (e. g. flange, arbour), the
cutting-off wheel driving device, feeding and depth control device, the protective/safety devices to afford
protection to the operator or site personnel and a device for mounting the saw unit on the track
prEN 15027:2022 (E)
3.3.2
track guiding system
device mounted in relation to the surface to be cut by means of fixing elements, guiding the saw unit
during the working process, designed to withstand the imparted stresses and incorporating end stops to
retain the saw unit at the track ends
3.3.3
cutting-off wheel
rotating abrasive tool(s) which perform(s) the cutting operation
Note 1 to entry: Abrasive wheels may be mounted either alone or as several units together according to the design
and usage of parameters of the machine.
Note 2 to entry: The tool is a rotating (segmented or continuous rim) diamond or similar superabrasive cutting-off
wheel.
3.3.4
tool mounting device
device (e.g. flange) to securely hold the cutting-off wheel(s) on the saw unit during the cutting operation
3.3.5
clamping flange system
system consisting of two plates with concentric tool seat, spanned by a locking device
3.3.6
flush cut flange system
system consisting of a single flange with concentric tool seat and a fixing device in order to mount the
tool
3.3.7
cutting-off wheel guard
device enclosing non-working parts of the cutting-off wheel
3.3.8
power supply unit
unit supplying hydraulic power required in order to perform the specific cutting operation
3.4
components of a wire saw
see Figure 2
prEN 15027:2022 (E)
Key
1 re drive unit 6 ed system
2 tting-off wire guard 7 re guiding device
3 ower source 8 re drive wheel
4 mote control 9 re storage
5 ower and coolant transmission 10 tting-off wire
Figure 2 — Components of a wire saw
3.4.1
wire drive unit
unit incorporating the wire driving wheel(s), feeding and tensioning device and the protective/safety
devices to afford protection to the operator or site personnel
Note 1 to entry: The wire drive unit may incorporate a wire storage and guiding device.
3.4.2
wire guiding device
device which can be mounted in the vicinity of the surface to be cut in order to guide the wire during the
cutting operation
3.4.3
cutting-off wire
flexible circulating abrasive tool which performs the cutting operation
3.4.4
power supply unit
unit supplying electric or hydraulic power required in order to perform the specific cutting operation
3.5
rated speed
maximum speed of the rotating spindle in revolutions per minute (wall saw) or speed of the cutting-off
wire in m/s (wire saw) at the rated conditions specified by the manufacturer under no load
prEN 15027:2022 (E)
3.6
nominal mass
mass of the machine components in kg as defined in the instruction manual but without cutting-off wheel
or cutting-off wire, all tanks empty
4 Safety requirements and/or measures
4.1 General
Machinery shall comply with the safety requirements and/or protective/risk reduction measures of this
clause. In addition, the machine shall be designed according to the principles of EN ISO 12100:2010 for
relevant but not significant hazards which are not dealt with by this document.
Covering each significant hazard is sufficient for covering combinations of hazards.
4.2 Mechanical hazard
4.2.1 General
Components and parts which shall be manually handled and all the accessible parts, with the exception
of the cutting-off wheel or the cutting-off wire, shall be free of sharp edges and burrs which could generate
hazards when setting, using, handling and maintaining the machine. Burrs resulting from, for example,
manufacturing, casting or welding shall be eliminated and sharp edges shall be smoothed.
4.2.2 Protection against moving parts
4.2.2.1 Transmission parts
Rotating transmission parts, for example, couplings and drive shafts shall be provided with fixed
enclosing guards to prevent contact. These guards shall comply with EN ISO 14120:2015 and
EN ISO 13857:2019, Table 4. Fixed enclosing guards shall be held in position either by welding or by
mounting them in such a way that they can be opened or removed only with the aid of tools or keys.
Fixed enclosing guards shall have their fixing system permanently attached to the guard and/or the
machine when the guard is removed.
4.2.2.2 Moving parts involved in the working process
4.2.2.2.1 Wall saws
Wall saws shall be provided with a cutting-off wheel guard to protect the user during normal use against:
— accidental contact with the cutting section of the cutting-off wheel;
— ejection of debris of the material cut;
— broken segments of the cutting-off wheel;
— liquid used for the cutting operation (if applicable).
The cutting-off wheel guard may be removable without the aid of a tool to facilitate changing the cutting-
off wheel or transportation, provided that the locking means for the cutting-off wheel guard remains
attached on the cutting-off wheel guard or the saw unit.
NOTE In normal use, the cutting-off wheel guards of a wall saw are always disassembled for transport, during
change of working position and for changing the cutting-off wheel. The cutting-off wheel guard is then reassembled
for operation each time. In addition, it is typical that the cutting-off wheel guard needs to be disassembled and
reassembled several times in order to perform a deep cut.
prEN 15027:2022 (E)
The cutting-off wheel guard, except as specified below for special cutting operations, shall cover at least
175° of:
— the periphery and the motor side;
— the side where the nut and locking flange are located for at least the outer 30 mm of the radius of the
smallest cutting-off wheel which may be used with the cutting-off wheel guard to cover the cutting
section of the cutting-off wheel.
In order to perform special cutting operations (e.g. flush cutting)
— a section of the cutting-off wheel guard may be removable or adjustable without the aid of a tool,
provided the remaining cutting-off wheel guard coverage is not less than 90°, or a separate cutting-
off wheel guard complying with this requirement may be supplied with the wall saw;
— a side of the cutting-off wheel guard may be removable without the aid of a tool to allow a flush cut
close to an adjacent surface, provided the cutting-off wheel guard coverage on the motor side is not
impaired, or a separate cutting-off wheel guard complying with this requirement may be supplied
with the wall saw.
Requirements for the strengths of cutting-off wheel guards are specified in Annex C.
4.2.2.2.2 Wire saws
The drive, tensioning (feed) and storage system of the wire saw except of the external wire guiding
devices shall be covered with guards to avoid inadvertent contact. This/these guard(s) shall have
sufficient strength to protect against ejection of fragments of the tool. Brittleness of the guard material
shall be taken into account. Permanent plastic deformation of the guard resulting from stress shall be
allowed. Requirements for the strength of wire guards are specified in Annex C. The distance from the
unprotected moving tool to the remote control shall allow that the operator can operate the machine
outside the dangerous area described in the instruction manual (see 6.2.2.3).
The wire guard may be removable without the aid of a tool to facilitate changing the wire or
transportation, provided that the locking means for the wire guard remains attached on the wire guard
or the saw unit.
4.2.3 Stability
Machines shall be equipped with fixing devices which shall allow a rigid and safe mounting in relation to
the material to be cut. Nuts and screws intended to adjust the mountings in position shall need intentional
action to loosen.
4.2.4 Transport and handling
The movable parts of the machine shall be either lockable or removable to avoid risk of shearing,
crushing, unlocking or falling down e.g. during handling or carrying.
NOTE For technical requirements relating to transport and lifting of machines see EN ISO 12100:2010, 6.3.5.5
and Annex A.
4.2.5 Fixing of the cutting-off wheel
4.2.5.1 Device for mounting the cutting-off wheel
The device for mounting the cutting-off wheel on the wall saw shall be designed that loosening and
untightening shall only be possible by an intentional manual action (e.g. by retaining the cutting-off wheel
on the drive spindle by a fixing device preventing loosening of the tool when in use).
prEN 15027:2022 (E)
4.2.5.2 Flanges
The wall saw shall be designed to prevent the cutting-off wheel coming loose under normal use.
The spindle and flanges shall be designed so that they secure and locate the cutting-off wheel to the wall
saw. At least one of the flanges shall be keyed, screwed, shrunk on or otherwise secured to prevent
rotation relative to the tool spindle.
Either the direction of the spindle threads shall be such that any clamping device or cutting-off wheel
with threaded hole tend to tighten during cutting or the flange shall have positive locking to the spindle.
Flanges shall have flat clamping surfaces and no sharp edges.
Clamping flanges for wall saws used to mount the rotating tools shall secure a safe transmission of
torques and forces to the tool during the whole cutting process including foreseeable misuse. Clamping
flanges shall be designed in a way that the loads to the rotating tool during the cutting process will not
lead to a fatigue or failure in the clamping zone of the rotating tool.
NOTE Flanges can also be designed in accordance with ISO 21537-2:2004, type E.
4.2.6 Combustion engine-starting device
The combustion engine-starting device shall be an electric starter or a manual starter. The actuator for
the manual starter shall be permanently attached to the machine and have a recoil device for the rope.
4.2.7 Guiding systems
The track-guiding system shall be provided with end stops to prevent travel of the saw unit beyond the
intended travel when subjected to the maximum feeding force.
4.2.8 Control devices
4.2.8.1 General
For control functions in hydraulic and pneumatic systems, the requirements specified in
EN 60204-1:2018, Clause 9, EN ISO 4413:2010 and EN ISO 4414:2010 shall be applied.
Control devices shall be marked without ambiguity. They shall be positioned for safe, quick and
comfortable operation.
NOTE For guidance, see EN ISO 12100:2010, 6.2.8.
For safety-critical functions (SCF), performance level (PL) values shall be determined using the methods
of prEN ISO 13849-1:2021 (see Table 1).
Table 1 — Required performance levels
Type and purpose of SCF Minimum performance level (PL)
Power switch – prevent unwanted switch-on
(including power switches located on a remote b
control)
Power switch – provide desired switch-off
(including power switches located on a remote c
control)
For wall saws: Provide desired direction of
rotation when the cutting-off wheel is not c
prevented from loosening under reverse rotation
Restart prevention after power failure c
prEN 15027:2022 (E)
Type and purpose of SCF Minimum performance level (PL)
Prevent starting of any motor drive without a
remote connection to a remote control and stop
operation of any motor drive after loss of a remote c
connection to a remote control during operation
as in 4.2.8.2
Prevent self-resetting as required in 4.2.8.2,
except for circuits that switch off the tool owing to a
a loss of a remote connection on a remote control
Prevent self-resetting after re-establishing a
remote connection on a remote control, as c
required in 4.2.8.2
4.2.8.2 Start and stop control device for rotation and feed
Machines shall be equipped with control devices to start and stop the motor, the cutting action of the
cutting tool and the powered feed. Start and stop devices shall be easily accessible to the operator.
Wall saws shall be equipped with a control which, when stopping the feed, holds the saw unit in a
sustained position.
Wall and wire saws shall be equipped with a remote control. The remote control may be an integral part
of the power supply unit. The design of the remote control shall allow the operator to control the machine
from outside the danger zone as defined by the manufacturer in the operator's instructions (see 6.3.2.3).
NOTE The danger zone for wire saws is considered as twice the maximum length of the free running wire as
shown in Annex F.
Due to conditions on the construction site, danger zones can exist (as described in the operator's manual
according to 6.3.2.3 and Annex F) that cannot be supervised by the operator from the different possible
control positions. For such cases, the manufacturer shall offer and/or recommend appropriate safety
devices (e.g. protection guard, shock absorbing element, etc.).
For cable-less control, an automatic stop shall be activated when correct signals are not received,
including loss of communication.
All machines with a powered feed shall be fitted with an easily accessible emergency stop in the system.
This emergency stop shall be in accordance with EN ISO 13850:2015. It shall stop all dangerous
movements as quickly as possible without creating an additional hazard.
4.2.9 Failure of the power supply
Interruption of the power supply and re-establishment after an interruption shall not lead to a dangerous
situation in particular:
— the machine shall not be restarted automatically, an intentional action shall be necessary;
— the machine shall not be prevented from stopping if the stop command has been given;
— the cutting-off wire shall not loose tension or shall be prevented from falling off the guiding system;
— a power failure or a hydraulic or pneumatic pressure drop shall not cause any dangerous movements
or actions.
Such failures shall not obstruct any stop controls from functioning.
prEN 15027:2022 (E)
4.3 Electrical hazards (wire saws)
Wire saws with an electric motor shall fulfil the electrical safety requirements of EN 60204-1:2018, in
particular Clauses 4, 5, 6, 14, 15 and 16. In addition to EN 60204-1:2018, 4.4.2, these machines shall work
as intended in an ambient temperature range of 0 °C – 40 °C.
For machines with three phase electrical supply, a device enabling phase inversion (to ensure correct tool
rotation) shall be provided.
The enclosure of the electrical controls shall provide a degree of protection of at least IP 54 according to
EN 60529:1991.
Electrical wall saws which are used as wire saws shall fulfil the electrical safety requirements of
EN IEC 62841-3-7:2021.
4.4 Thermal hazards
4.4.1 General
Handles and other surfaces which require continuous contact shall have a surface temperature not
exceeding 43 °C.
Controls and other parts of the machine which are contacted occasionally shall meet the limits as given
in EN ISO 13732-1:2008, 4.2, according to the chosen material for a contact period up to 5 s, lowest curve.
Hot areas which can be contacted unintentionally shall meet the levels of EN ISO 13732-1:2008 for a
contact period below 1 s. These areas shall be either located at a distance greater than 120 mm from the
gripping areas, or they shall be protected by shields.
These shields shall be designed to reduce the heat transfer from the surface to the body of the operator.
This can be achieved by a structured surface, ribs or special coating.
Electric wall saws used as wire saws shall fulfil the thermal requirements of EN IEC 62841-3-7:2021.
4.4.2 Test method
The test method to verify the surface temperature of the machine is described in Annex E.
The machine parts whose temperatures exceed the permissible limits of EN ISO 13732-1:2008 for a
contact period not exceeding 1 s and whose surface is greater than 10 cm², shall not be accessible to the
test cone according to Annex E.
4.5 Exhaust fumes (internal combustion engines machines)
The engine’s exhaust shall not be directed towards the operator when in the operating position as
specified by the manufacturer.
This requirement is considered fulfilled when the angle made by the axis of the outlet of the exhaust
device and the lengthways axis of the machine, measured from the position of the operator, is equal to or
greater than 90°.
4.6 Hydraulic and pneumatic installations
4.6.1 Hydraulic installations
The hydraulic installations shall comply with the requirements of EN ISO 12100:2010, 6.2.10, and
EN ISO 4413:2010.
4.6.2 Pneumatic installations
The pneumatic installations (e. g. feed systems for wire saws) shall comply with the requirements of
EN ISO 12100:2010, 6.2.10, and EN ISO 4414:2010.
prEN 15027:2022 (E)
4.6.3 Hoses and pipes under pressure
Hoses and pipes under hydraulic and pneumatic pressure respectively shall conform to the requirements
of EN ISO 4413:2010 and EN ISO 4414:2010 respectively.
Machines with hoses and pipes under pressure shall be so designed that all components withstand the
effect of hot surfaces, inlet pressure and stored energy.
Pipes, hoses and s shall be able to withstand the stresses from the pressure. The hoses shall be marked
with the rated working pressure.
Flexible hydraulic hoses intended for pressures higher than 15 MPa (150 bar) shall not be installed by
means of reusable fittings. Fittings which require dedicated tooling (such as a press) and parts authori
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