SIST EN 14957:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Food processing machinery - Dishwashing machines with conveyor - Safety and hygiene requirementsStroji za obdelavo hrane – Stroji za pomivanje posode s transportnim trakom – Varnostne in higienske zahteveMachines pour les produits alimentaires - Lave-vaisselle a convoyeur - Prescriptions relatives a la sécurité et a l'hygieneNahrungsmittelmaschinen - Gewerbliche Geschirrspülmaschinen mit Transporteinrichtung - Sicherheits- und HygieneanforderungenTa slovenski standard je istoveten z:EN 14957:2006SIST EN 14957:2007en97.040.40Pomivalni strojiDishwashers67.260Tovarne in oprema za živilsko industrijoPlants and equipment for the food industryICS:SLOVENSKI
STANDARDSIST EN 14957:200701-marec-2007







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14957November 2006ICS 67.260; 97.040.40 English VersionFood processing machinery - Dishwashing machines withconveyor - Safety and hygiene requirementsMachines pour les produits alimentaires - Lave-vaisselle àconvoyeur - Prescriptions relatives à la sécurité et àl'hygièneNahrungsmittelmaschinen - Geschirrspülmaschinen mitTransporteinrichtung - Sicherheits- undHygieneanforderungenThis European Standard was approved by CEN on 22 September 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14957:2006: E



EN 14957:2006 (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.8 4 List of significant hazards.9 4.1 General.9 4.2 Mechanical hazards.9 4.3 Electrical hazards.10 4.4 Thermal hazards.11 4.5 Chemical hazards.11 4.6 Hazards generated by neglecting hygiene principles in machine design.11 4.7 Hazards generated by neglecting ergonomic principles.11 4.8 Hazard from loss of stability.11 5 Safety and hygiene requirements and/or protective measures.11 5.1 General.11 5.2 Mechanical hazards.12 5.3 Electrical hazards.15 5.4 Thermal hazards.16 5.5 Chemical hazards.16 5.6 Hygiene.16 5.7 Ergonomics.16 5.8 Hazard from loss of stability.16 6 Verifications of safety and hygiene requirements and/or protective measures.17 7 Instruction for use.17 7.1 General.17 7.2 Instruction handbook.17 7.3 Marking.19 Annex A (normative)
Noise test code for dishwashing machines with conveyor (Grade 2).20 A.1 Emission sound pressure level determination.20 A.2 Installation and mounting conditions.20 A.3 Operating conditions.20 A.4 Measurement.21 A.5 Measurement uncertainties.21 A.6 Information to be recorded.21 A.7 Information to be reported.21 A.8 Declaration and verification of noise emission values.21 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC.23 Bibliography.24



EN 14957:2006 (E) 3 Figures Figure 1 — Types of dishwashing machines.9 Figure 2 — Hazards zones.10 Figure 3 — Flight type machine – Zone 1.12 Figure 4 — Reciprocating rack conveyor device.13 Figure 5 — Safety distance for a flight type machine.14 Figure 6 — Safety distance for a rack conveyor type machine.14 Figure A.1 — Microphone positions.20
Tables Table 1 — Methods of verifications.17



EN 14957:2006 (E) 4 Foreword This European Standard (EN 14957:2006) has been prepared by Technical Committee CEN/TC 153 “Food processing machinery — Safety and hygiene specifications”, 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 2007, and conflicting national standards shall be withdrawn at the latest by May 2007. This European Standard 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 Directives. For relationship with EU Directives, see informative Annex ZA, which is an integral part of this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 14957:2006 (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 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.



EN 14957:2006 (E) 6
1 Scope 1.1 This European Standard applies to multizones dishwashing-machines with passing through motorized belt (flight type) or rack conveyor. In case of flight type, the loading and unloading areas are part of the machine. The machines covered by this European Standard are intended for washing, rinsing and optionally drying the dishes and the kitchen utensils, used in food and catering premises such as restaurants, hotels etc. This European Standard applies to dishwashing machines with conveyor with a linear speed less than or equal to 5 m/min for the dishes and kitchen utensils. NOTE Normally the total power of these machines is less than 200 kW. This European Standard deals with all significant hazards, hazardous situations and events relevant to dishwashing machines with conveyor, when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4). This European Standard deals with the hazards which can arise during commissioning, operation, maintenance and decommissioning of the machine. When drawing up this European Standard the following assumptions were made:  only trained adult persons operate the machines;  the machines are used in adequately illuminated areas. This European Standard, referring for electrical safety to EN 60204-1 with criteria that can be applied to different designs and variants, is mainly intended for machines manufactured in small series. 1.2 This European Standard does not apply to:  separate mechanical loading and unloading conveyors;  chemical dosing devices which are not incorporated into the machine;  steam generators;  gas heating equipment. 1.3 Noise is not considered to be a significant hazard for these machines. This does not mean that the manufacturer of these machines is absolved from reducing noise and making a noise declaration. Therefore a noise test code is included in Annex A. 1.4 This European Standard is not applicable to dishwashing-machines with conveyor which are manufactured before the date of publication of this European Standard by CEN. 2 Normative references The following referenced documents are indispensable for the application 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 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper limbs EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body



EN 14957:2006 (E) 7 EN 614-1, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards EN 954-1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection EN 1672-2, Food processing machinery — Basic concepts — Part 2: Hygiene requirements EN 1760-2, Safety of machinery — Pressure sensitive protective devices — Part 2: General principles for the design and testing of pressure sensitive edges and pressure sensitive bars EN 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005 modified) EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) CLC/TS 61496-2, Safety of machinery — Electro-sensitive protective equipment — Part 2: Particular requirements for equipment using active opto-electronic protective devices (AOPDs) (IEC 61496-2:1997) EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994) EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996) EN ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Engineering method in an essentially free field over a reflecting plane (ISO 11201:1995) EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003) 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 13732-1:2006) 3 Terms, definitions and description 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following apply. 3.1.1 conveyor drive mechanism to transport the load through the machine 3.1.2 types of conveyor 3.1.2.1 type 1 flight type endless peg conveyor where the dishes are loaded directly to the pegs (see Figure 1b)



EN 14957:2006 (E) 8 3.1.2.2 type 2 conveyor for racks that can be made of one or two endless chains or reciprocating mechanism (see
Figures 1a and 1c) 3.1.3 dishes pans, containers, plates, cups etc., used in the professional catering and restaurants 3.1.4 inspection door door giving access to the processing zones for cleaning and maintenance 3.1.5 access for technical area door or panel giving access to technical areas for repair and/or maintenance 3.1.6 multizone machine machine where the different functions (e.g. washing, rinsing, drying) are located in different areas of the machine 3.2 Description A dishwashing machine with conveyor is generally composed of:  a frame;  doors giving access to the different zones;  a motorised belt or rack conveyor;  a water heating device;  a water circulation device. The main different zones can be:  a loading area;  a washing compartment;  a rinsing compartment;  a drying compartment;  a vapour exhaust device;  one or several electrical and/or electronic compartments;  a control panel;  dosing device, if any;  an unloading area.



EN 14957:2006 (E) 9 Figure 1a — Racks conveyor type machine Figure 1b — Flight type machine
Figure 1c — Reciprocating rack conveyor type device Figure 1 — Types of dishwashing machines 4 List of significant hazards 4.1 General This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with in this European Standard, identified by risk assessment as significant for dishwashing machines with conveyor, and which require action to eliminate or reduce the risk. 4.2 Mechanical hazards The significant mechanical hazards are:  crushing hazard;  shearing hazard;  drawing-in hazard.



EN 14957:2006 (E) 10 The Figure 2 illustrate 5 danger zones of the machine: Zone 1: Area between moving parts of the conveyor and load and the fixed parts of the machine at loading and unloading areas. Hazards of crushing, shearing and drawing-in. Zone 2: Areas between moving parts of the conveyor mechanism and their load at both extremities of the processing zones. Hazards of drawing-in, shearing and crushing. Zone 3: Inspection doors giving access to the processing zones or conveyors. Hazards of crushing, shearing, drawing-in or pressurised fluid spilling. Zone 4: Area giving access to the driving mechanism and technical movable parts. Hazards of crushing, shearing and drawing-in. Zone 5: Drying area. Hazards of crushing, shearing and drawing-in.
Key
1 zone 1 2 zone 2 3 zone 3 4 zone 4 5 zone 5 A unloading area B drying area C processing area D washing area E loading area Figure 2 — Hazards zones 4.3 Electrical hazards Hazard of electrical shock from direct or indirect contact with live components. Hazard of external influences on electrical equipment such as the presence of water.



EN 14957:2006 (E) 11 Hazard due to fire and explosion. 4.4 Thermal hazards Hazard of burn due to the contact of hands with heating elements or other elements at high temperature. Hazard of burn due to water splashes while opening the inspection doors. 4.5 Chemical hazards Hazard due to contact with or inhalation of detergent and vapours. 4.6 Hazards generated by neglecting hygiene principles in machine design The major risk is the accumulation of food soils inside the processing zones of the dishwashing machine, e.g. filters, tanks, which can lead to growth of micro-organisms. NOTE Hazards of potable water network pollution are dealt with by EN 1717 or EN 61770. 4.7 Hazards generated by neglecting ergonomic principles Risk of injury or chronic damage to the body resulting from harmful body postures during operation (loading, unloading), cleaning (racks, filters, access doors) and during the hand loading of dosing devices and dispensers. 4.8 Hazard from loss of stability Impact or crushing hazard if the machine topples over. 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 12100-2 for relevant but not significant hazards, which are not dealt with by this document. For hazards which are to be reduced by the application of the type B-standards such as EN 294, EN 349, EN ISO 13732-1, EN 614-1, EN 953, EN 954-1, EN 1088, EN 1760-2, EN 60204-1, EN 60529
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