Food processing machinery - Intermediate provers - Safety and hygiene requirements

This standard specifies safety and hygienic design requirements for the manufacture of machines used for the production of pies, tarts, pasties, en croute products and other similar items where the pastry cases are formed by the closing under pressure of one or more forming heads. The standard applies to the following three basic types of machine:
- machines where operators hands enter hazard zone 1 (see 4.1) at each cycle;
- machines which are loaded outside hazard zone 1;
- automatic machines.
Automatic loading devices are not covered by this standard.
This standard applies to electrically, pneumatically and hydraulically powered machines. Manually operated machines are excluded from the scope of this standard.
The safety and hygiene requirements take into account the hazards arising from use (including setting, process changeover, operation), cleaning and maintenance. Hazards arising from foreseeable misuse are also included.
A noise test code is included to assist manufacturers to measure noise level for the purpose of the noise emission declaration.
This document is not applicable to pie and tart machines which are manufactured before the date of publication of this document by CEN.

Nahrungsmittelmaschinen - Zwischengärschrank - Sicherheits- und Hygieneanforderungen

1.1   Diese Norm legt die Sicherheits  und Hygieneanforderungen an die Konstruktion und die Herstellung von Zwischengärschränken mit sich bewegenden Taschenträgern fest, wie in Abschnitt 3 beschrieben, die entweder einzeln oder hintereinander in der Nahrungsmittelindustrie, in Bäckereien, Konditoreien etc. zum Einsatz kommen, um dem Teig eine Ruhezeit zwischen den Teil- und Formvorgängen zu geben.
Diese Europäische Norm behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefähr-dungsereignisse, die während Installation, Einstellarbeiten, Betrieb, Reinigung, Wartung, Zerlegung, Außer-betriebnahme und Abwracken von Zwischengärschränken mit sich bewegenden Taschenträgern auftreten können, wenn sie bestimmungsgemäß und unter Bedingungen von durch den Hersteller vernünftigerweise vorhersehbaren Fehlanwendungen verwendet werden (siehe Abschnitt 4).
Die signifikanten Gefährdungen, die durch diese Norm abgedeckt sind, sind mechanische (Scheren, Fangen, Schneiden/Abschneiden, Verlust der Standfestigkeit), elektrische, ergonomische Gefährdungen, das Zerbrechen von Lampen und solche Gefährdungen, die durch das Einatmen von Mehlstaub und durch mangelnde Hygiene hervorgerufen werden.
Gefährdung durch Geräusche wird für Zwischengärschränke nicht als signifikant betrachtet. Dies bedeutet aber nicht, dass der Hersteller der Maschine davon befreit ist, diese Geräusche zu reduzieren und eine Angabe über sie abzugeben. Dafür werden im Anhang A Regeln für die Geräuschmessung angegeben.
1.2   Folgende Maschinen sind ausgenommen:
-   nicht angetriebene Gärkammern;
-   eigenständige automatische Beladungssysteme ohne verriegelte trennende Schutzeinrichtung;
-   Versuchs  und Prüfmaschinen, die in der Entwicklungsphase beim Hersteller sind.
1.3   Diese Europäische Norm gilt nicht für Zwischengärschränke mit sich bewegenden Taschenträgern, die vor ihrem Erscheinen als EN hergestellt wurden.

Machines pour les produits alimentaires - Chambres de repos - Prescriptions relatives à la sécurité et à l'hygiène

1.1   La présente norme spécifie les prescriptions de sécurité et d'hygiène relatives à la conception et à la fabrication des chambres de repos à balancelles mobiles utilisées dans les industries alimentaires, telles que décrites à l’Article 3, utilisées soit individuellement soit intégrées dans une ligne de fabrication en boulangeries, pâtisseries, etc. afin de donner à la pâte un temps de détente entre la division et le façonnage.
La présente Norme européenne traite de tous les phénomènes dangereux, situations et événements dangereux significatifs relatifs à l’installation, au réglage, au fonctionnement, au nettoyage, à la maintenance, au démontage, à la mise hors service et à la mise au rebut des chambres de repos à balancelles mobiles lorsqu’elles sont utilisées normalement et dans des conditions de mauvaise utilisation raisonnablement prévisibles par le fabricant (voir Article 4).
Les phénomènes dangereux significatifs couverts par la présente norme sont mécaniques (cisaillement, entraînement, coupure, perte de stabilité), électriques, ergonomiques, ainsi que ceux résultant de la casse des lampes, de l'inhalation de poussière de farine et du manque d'hygiène.
Le bruit n’est pas considéré comme un phénomène dangereux significatif pour les chambres de repos. Cela ne signifie pas que le fabricant de la machine est dispensé de réduire le bruit et de faire une déclaration de bruit. Pour ce faire, un code d’essai acoustique est proposé en Annexe A.
1.2   Les machines suivantes sont exclues :
-   les armoires repose-pâtons non alimentés électriquement ;
-   les systèmes d’alimentation automatiques sans protecteur verrouillé ;
-   les machines expérimentales ou d'essais en cours de mise au point par le fabricant.
1.3   La présente Norme européenne ne s'applique pas aux chambres de repos à balancelles mobiles qui sont fabriquées avant la date de publication de la présente norme en tant que Norme européenne.

Stroji za predelavo hrane - Komore za vmesno počivanje testa - Varnostne in higienske zahteve

Ta standard določa varnostne in higienske oblikovne zahteve za izdelavo strojev za izdelavo pit, kolačev, rolad, izdelkov, ki so pečeni, oviti v testo, in drugih podobnih izdelkov, kjer je ovoj iz testa oblikovan z zapiranjem pod pritiskom ene ali več glav za oblikovanje. Ta evropski standard se uporablja za naslednje tri osnovne skupine strojev:
– stroji, pri katerih roke upravljavca vstopijo v območje nevarnosti 1 (glej 4.1) pri vsakem ciklu;
– stroji, ki se natovorijo izven območja nevarnosti 1;
– avtomatski stroji.

General Information

Status
Published
Public Enquiry End Date
31-Jul-2012
Publication Date
18-Jan-2015
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Dec-2014
Due Date
16-Feb-2015
Completion Date
19-Jan-2015

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Nahrungsmittelmaschinen - Zwischengärschrank - Sicherheits- und HygieneanforderungenMachines pour les produits alimentaires - Chambres de repos - Prescriptions relatives à la sécurité et à l'hygièneFood processing machinery - Intermediate provers - Safety and hygiene requirements67.260Tovarne in oprema za živilsko industrijoPlants and equipment for the food industryICS:Ta slovenski standard je istoveten z:EN 12043:2014SIST EN 12043:2015en,fr,de01-februar-2015SIST EN 12043:2015SLOVENSKI

STANDARDSIST EN 12043:2002+A1:20111DGRPHãþD
SIST EN 12043:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12043
November 2014 ICS 67.260 Supersedes EN 12043:2000+A1:2010English Version

Food processing machinery - Intermediate provers - Safety and hygiene requirements

Machines pour les produits alimentaires - Chambres de repos - Prescriptions relatives à la sécurité et à l'hygiène

Nahrungsmittelmaschinen - Zwischengärschrank - Sicherheits- und Hygieneanforderungen This European Standard was approved by CEN on 6 September 2014.

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, 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 United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12043:2014 ESIST EN 12043:2015

EN 12043:2014 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 Introduction .........................................................................................................................................................5 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................6 3 Terms, definitions and description ......................................................................................................7 3.1 Terms and definitions ...........................................................................................................................7 3.2 Description .............................................................................................................................................7 4 List of significant hazards ....................................................................................................................8 5 Safety and hygiene requirements and/or protective measures ..................................................... 11 5.1 General ................................................................................................................................................. 11 5.2 Mechanical hazards ............................................................................................................................ 11 5.2.1 General ................................................................................................................................................. 11 5.2.2 Zone 1 and zone 6 – Zone of loading and unloading of the dough portions................................ 12 5.2.3 Zone 2 – Drive mechanisms .............................................................................................................. 13 5.2.4 Zone 3 — Carrier transfer system ..................................................................................................... 15 5.2.5 Zone 4 — Flour duster ........................................................................................................................ 15 5.2.6 Zone 5 – Fan with or without heating device ................................................................................... 15 5.2.7 Loss of stability ................................................................................................................................... 15 5.3 Electrical hazards ............................................................................................................................... 15 5.3.1 General ................................................................................................................................................. 15 5.3.2 Safety requirements related to electromagnetic phenomena ........................................................ 16 5.3.3 Protection against electric shock ..................................................................................................... 16 5.3.4 Power circuits ..................................................................................................................................... 16 5.3.5 Protection against earth faults in control circuits ........................................................................... 16 5.4 Emergency stop .................................................................................................................................. 16 5.5 Motor enclosures ................................................................................................................................ 16 5.6 Protection against flour dust emission ............................................................................................ 16 5.7 Thermal hazard ................................................................................................................................... 17 5.7.1 General ................................................................................................................................................. 17 5.7.2 Hot surfaces ........................................................................................................................................ 17 5.7.3 Fire hazard ........................................................................................................................................... 17 5.8 Lamps .................................................................................................................................................. 17 5.9 Hygiene requirements ........................................................................................................................ 17 5.10 Hazards generated by neglecting ergonomic principles ................................................................ 19 5.11 Hazards generated by UV radiation .................................................................................................. 19 6 Verification of safety and hygiene requirements and/or protective measures ............................ 20 7 Information for use ............................................................................................................................. 21 7.1 General ................................................................................................................................................. 21 7.2 Instruction handbook ......................................................................................................................... 21 7.3 Marking ................................................................................................................................................ 23 Annex A (normative)

Noise test code — Grade 2 of accuracy ................................................................... 24 Annex B (normative)

Principles of design to ensure the cleanability of intermediate provers ............... 27 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC ....................................................................................... 42 SIST EN 12043:2015

EN 12043:2014 (E) 3 Bibliography ...................................................................................................................................................... 43

SIST EN 12043:2015

EN 12043:2014 (E) 4 Foreword This document (EN 12043:2014) has been prepared by Technical Committee CEN/TC 153 “Machinery intended for use with foodstuffs and feed”, 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 May 2015 and conflicting national standards shall be withdrawn at the latest by May 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12043:2000+A1:2010. 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 2006/42/EC. For relationship with EU Directive 2006/42/EC, see informative Annex ZA, which is an integral part of this document. Significant changes: The significant changes with respect to the previous edition EN 12043:2000+A1:2010 are listed below: — protective measures for the loading were modified; — requirements for emergency stop were added; — requirements for nip guards were stated more precisely; — thermal hazards, lamps, and hazards generated by UV radiation were added; — the table of verification of safety and hygiene requirements was completely revised. 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. SIST EN 12043:2015

EN 12043:2014 (E) 5 Introduction This European Standard is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this European Standard. 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. SIST EN 12043:2015

EN 12043:2014 (E) 6 1 Scope 1.1 This European Standard specifies safety and hygiene requirements for the design and manufacture of intermediate provers with powered moving pocket carriers as described in Clause 3 and used in the food industry, pastry-making, bakeries, etc. for giving a resting time to dough between different phases of the process. This European Standard deals with all significant hazards, hazardous situations and events relevant to the installation, adjustment, operation, cleaning, maintenance, dismantling, disabling and scrapping of intermediate provers with moving pocket carriers when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4). Noise is not considered to be a significant hazard by intermediate provers. This does not mean that the manufacturer of the machine is absolved from reducing noise and making a noise declaration. Therefore a noise test code is proposed in Annex A. 1.2 The following machines are excluded: — independent automatic loading system not integrated with the machine; — experimental and testing machines under development by the manufacturer; — retarder and final proofer. 1.3 This European Standard is not applicable to intermediate provers with moving pocket carriers which are manufactured before the date of its publication as EN. 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 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 953, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards EN 1672-2:2005+A1:2009, Food processing machinery — Basic concepts — Part 2: Hygiene requirements EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified) EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529) EN 61000-6-1, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for residential, commercial and light-industrial environments (IEC 61000-6-1) 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) SIST EN 12043:2015

EN 12043:2014 (E) 7 EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters (ISO 4287) EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment (ISO 4871) EN ISO 11201, 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) EN ISO 12001, Acoustics — Noise emitted by machinery and equipment — Rules for the drafting and presentation of a noise test code (ISO 12001) EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction (ISO 12100:2010) EN ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1) EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006) EN ISO 13850, Safety of machinery — Emergency stop — Principles for design (ISO 13850) EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008) EN ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection (ISO 14119) 3 Terms, definitions and description 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the following applies. 3.1.1 pocket tilting/guided plate or tilting/guided basket or tilting/guided cup, inside the prover, on which the piece of dough is placed during the resting time 3.2 Description As shown in Figure 1, an intermediate prover consists of: — a variable number of pockets supported in a carrier into which dough pieces are placed. One pocket may hold more than one dough piece; — a mechanical transfer system moving the pocket carrier along a defined path inside the machine; — a housing supporting or containing the transmission machinery. The following features may also be included: SIST EN 12043:2015

EN 12043:2014 (E) 8 — an automatic device to control the temperature and/or humidity inside the machine; — a flour dusting device; — other accessories, e.g. germicidal lamp (device to prevent the formation of mould – generally an ultraviolet lamp), pocket drier (device to dry the pockets – generally an infrared lamp or a ventilation system with or without heating); — integrated system(s) to load/unload the pockets. The resting time is the period of time from loading until unloading of a single pocket. This time can be fixed or variable. There are openings in the frame where dough portions are introduced into the machine and where they are taken out. The position of loading and unloading depends on the frame shape and the path of movement of the pockets. Some machines may have more than one unloading position. These machines may provide different resting times depending on which of the unloading positions is being used. The movement of the pockets may be continuous or intermittent. In some cases (e.g. cleaning, lubrication…) access to the path of movement of the pockets – in addition to the loading and unloading openings – is provided. 4 List of significant hazards This clause contains all the significant hazards, hazardous situations and events identified by risk assessment as significant for this type of machinery and which require action to eliminate or reduce the risk (see Table 1). SIST EN 12043:2015

EN 12043:2014 (E) 9 Table 1 – List of significant hazards Hazards, hazardous situations and hazardous events Location or cause Clause/subclause in this European Standard Mechanical hazards (see Figure 1): 5.2 — shearing; — trapping; — drawing-in; — crushing Zone 1 – zone of loading and unloading of the dough portions Zone 3 – carrier transfer system (except Zone 1) Zone 6 – between chain and sprockets Zone 4 – zone covered by moving parts of the flour duster (if fitted) — cutting; Zone 2 – drive mechanisms Zone 5 – fan with or without heating device — loss of stability Complete machine Electrical hazards Electric shock from direct or indirect contact with live components External influences on electrical equipment (e.g. cleaning with water) Unexpected start-up Electromagnetic disturbance 5.3 Hazards generated by materials and substances (inhalation of dust) Flour dusters 5.4 Thermal hazards Fan with or without heating device 5.5 Material/substance hazards Breakage of the lamps (e.g. germicidal lamps, lights, etc.) 5.6 Hazard generated by neglecting hygienic design principles e.g. contamination by microbial growth or foreign materials 5.7 Hazard generated by neglecting ergonomic principles During operation, cleaning and maintenance 5.8 Hazard generated by UV radiation UV lamps 5.9

The examples in Figure 1 illustrate the danger zones associated with these hazards: — Zone 1: zone of loading of the dough portions, hazards of shearing, trapping; — Zone 2: drive mechanisms, hazards of shearing, trapping, cutting; — Zone 3: carrier transfer system (except zone 1), hazards of shearing, trapping; — Zone 4: zone covered by moving parts of the flour duster (optional), hazards of shearing, trapping; (not shown in Figure 1b) — Zone 5: fan with or without heating device, hazards of cutting, burns; — Zone 6: zone of unloading of the dough portions, hazards of shearing, trapping.

SIST EN 12043:2015
EN 12043:2014 (E) 10
a) Example of a small intermediate prover
b) Example of an automatically loaded intermediate prover SIST EN 12043:2015
EN 12043:2014 (E) 11

c) Example of an automatic feeding intermediate prover Figure 1 — Danger zones for various types of intermediate provers 5 Safety and hygiene requirements and/or protective measures 5.1 General Machinery shall comply with the safety requirements and/or protective measures of this clause. In addition, the machine shall be designed according to the principles of EN ISO 12100 for relevant but not significant hazards, which are not dealt with by this document. Fixing systems of fixed guards or of parts of the machine acting as such shall remain attached to the guards or to the machinery when the guards are removed. 5.2 Mechanical hazards 5.2.1 General Where reference is made to interlocking devices, they shall comply with EN ISO 14119. Where the interlocking mechanism has movable parts, e.g. position switches, these shall not be affected by contamination with dough or dry ingredients. Where safety related parts may be exposed to water, e.g. during cleaning, they shall be protected to an appropriate IP rating at least IPX4 (see EN 60529). The safety related parts of the control systems shall present at least a performance level “c” defined in accordance with EN ISO 13849-1:2008. SIST EN 12043:2015

EN 12043:2014 (E) 12 5.2.2 Zone 1 and zone 6 – Zone of loading and unloading of the dough portions 5.2.2.1 When loading is manual, the risk of trapping the arm between the moving pocket carrier and the fixed edges of the loading or unloading openings shall be prevented by: — using a hold to run control device. This method can only be used where both the loading and the unloading area are visible from the position of the control device or — ensuring the distance between the fixed edge of the opening and the nearest rigid part of the pocket carrier is a minimum of 120 mm (see Figure 2) and provision of a fixed guard behind the first line of carriers preventing through access.

a) b) c) Key 1
movement of tilting pocket 2
movement of tilting pocket 3
movement of fixed pocket 4

frame Figure 2 — Gap between fixed edge and moving pocket carrier 5.2.2.2 When loading is automatic the following shall apply: — either the loading system is enclosed in the machine frame with at least one interlocking guard, in order to permit the access for cleaning in the loading zone; — or the loading system is outside the frame, but is part of the prover: the loading system shall be mechanically and electrically interlocked with the machine and access to any danger points of the loading zone shall be prevented by a provision of a fixed or an interlocking guard. In both cases all openings shall be in accordance with the dimensions indicated in Table 2. Otherwise, a trip device is mandatory. Interlocking devices shall be actuated when the guard is opened at the maximum of 25 mm from the closed position. SIST EN 12043:2015

EN 12043:2014 (E) 13 Table 2 — Dimensions of the opening in closed conditions Dimensions in millimetres A max. 40 45 50 55 60 65 70 105 140 250a B min. 225 250 300 350 400 450 500 550 600 850

E See EN ISO 13857:2008, Table 4 Where: A: maximum distance between the conveyor belt and the front opening of the guard when the interlocking device actuates; B: minimum distance between the edge of the guard and the vertical plane through the axis of the nearest roller; E: distance between the lower edge of the guard and the conveyor belt. a The distance between the table and the front opening of the guard when the guard in the rest position shall be less or equal to 200 mm.

5.2.3 Zone 2 – Drive mechanisms Access to the primary drive system, for example motor and V-belt drives, shall be prevented. This may be achieved by use of fixed guards complying with EN 953. The machine frame itself may act as a fixed guard. Access to inrunning nips of the pocket carriers shall be prevented by one of the following: — ensuring that the distances between openings and in-running nips are in accordance with EN ISO 13857; — individual safeguarding with nip guards as shown in Figure 3; — using hold to run button (see 5.2.2.1). SIST EN 12043:2015

EN 12043:2014 (E) 14
Key 1 guard 2 belt 3 pulley a) Nip guards for pulleys and belts

Key 1 guard 2 chain 3 sprocket b) Nip guards and protection for chains and sprockets Figure 3 — Safeguarding of inrunning nips SIST EN 12043:2015

EN 12043:2014 (E) 15 5.2.4 Zone 3 — Carrier transfer system If access to inside of the machine is required for maintenance or cleaning purposes, the access to the hazardous zones shall be prevented by fixed guards or interlocking movable guards (e.g. doors, movable panels), depending on the frequency of access. The guards shall be in accordance with EN 953. Openings shall be in accordance with EN ISO 13857. 5.2.5 Zone 4 — Flour duster If there are mechanical risks (e.g. crushing, trapping…), the access to the dangerous zone shall be protected by a fixed guard or interlocked guard. Openings in the guards shall be in accordance with EN ISO 13857:2008, Table 4. If the stopping time of the flour duster is more than 1 s, the movable guard shall be interlocked with guard locking. If there are no mechanical hazards (e.g. if the feed consists of a spindle with rubber spokes or notches, or if the flour is sprinkled by a vibrating device) due to the flour feed system and if a guard is necessary to prevent flour dust emission (see 5.7), this guard shall automatically be closed (e.g. by gravity, etc.). In this case, an interlocked guard is not necessary. 5.2.6 Zone 5 – Fan with or without heating device Access to the fan and/or heater shall be prevented by any of the following: — either the sum of the distances from the floor to the danger point is greater than or equal to 2,50 m; — or access to the danger point is prevented by fixed guards, e.g. wire mesh with dimensions in accordance with EN ISO 13857:2008, Table 4. 5.2.7 Loss of stability 5.2.7.1 Machines shall be designed to be stable and shall comply with 5.2.7.2 and 5.2.7.3 as applicable. For machines designed to be fixed to the floor, the instruction handbook shall indicate the values of forces at the fixing points. 5.2.7.2 Free standing machines without castors shall be stable when tilted 10° from the horizontal plane, in the most unfavourable direction. 5.2.7.3 Free standing machines with castors shall have a locking device for example a brake on at least two castors (or sets of castors) and shall comply with the provisions of 5.2.7.2. 5.3 Electrical hazards 5.3.1 General Electrical equipment – for example switches – that may be exposed to water, e.g. during cleaning, shall be protected to an appropriate IP rating according to EN 60529 and EN 60204-1. The electrical equipment shall comply with EN 60204-1, with the following requirements given from 5.3.2 to 5.3.5. SIST EN 12043:2015

EN 12043:2014 (E) 16 5.3.2 Safety requirements related to electromagnetic phenomena The machines shall have sufficient immunity to electromagnetic disturbances to enable them to operate safely as intended and not fail to danger when exposed to the levels and types of disturbances for the intended use of the machine (see EN 61000-6-1). The manufacturer of the machines shall design, install and wire the equipment and sub-assemblies taking into account the recommendations of the suppliers of these sub-assemblies. 5.3.3 Protection against electric shock The electrical equipment shall comply with EN 60204-1:2006, Clause 6. 5.3.4 Power circuits Devices for detection and interruption of over-current shall be applied to each live conductor in compliance with EN 60204-1:2006, 7.2.3. In case of single phase machines, no such device is required for the earthed neutral conductor. 5.3.5 Protection against earth faults in control circuits For machinery supplied from a single-phase conductor and an earthed neutral conductor the single pole interruption shall be in the phase conductor (see EN 60204-1:2006, 9.4.3.1). 5.4 Emergency stop An emergency stop device, according to EN ISO 13850, is required when loading and unloading zones are not at the same side of the machine. Stopping category 0 or 1 according to EN 60204-1:2006, 9.2.2, is required. The emergency stop shall be located in the loading zone and unloading zone. 5.5 Motor enclosures Where a motor has a degree of protection lower than IP23 (see EN 60529) it shall be mounted inside an enclosure (see EN 60204-1:2006, 14.2) that guarantees a minimum degree of protection of IP23 (see EN 60529). 5.6 Protection against flour dust emission Means shall be provided to prevent flour from spilling onto the floor, for example a collecting device for flour below the end of conveyors. If a fan is used (drying/air conditioning), means shall be implemented to prevent any additional flour dust emission outside the machine. If a flour duster is used to sprinkle special types of dough, the following shall be provided: — a solid cover; — means to stop the flour duster if the machine stops; — maximum height of 5 cm from the underside of the flour duster to the largest dough pieces as specified in the instruction handbook. SIST EN 12043:2015

EN 12043:2014 (E) 17 5.7 Thermal hazard 5.7.1 General If a heating system is used, a thermal protection shall be provided to prevent risks from hot surfaces and fire. 5.7.2 Hot surfaces To prevent injury from hot external surfaces, the heating system shall be designed so that the temperatures of external surfaces comply with EN ISO 13732-1 in case of unintentional contact, e.g. distances, insulation, material etc. In addition, warning signs (see Figure 4) shall be attached to warn of hot surfaces for operation of maintenance and cleaning.

a) b) Figure 4 — Examples of warning signs for hot surfaces 5.7.3 Fire hazard In case of overheating, the power of the heating system

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