BS EN 14957:2006 pdf download

BS EN 14957:2006 pdf download.Food processing  machinery一 Dishwashing machines with conveyor一Safety and hygiene requirements.
— counterbalancing if not depending on one single element (see also 5.7). In this case, a failure in one of the counterbalancing elements shall not allow a closing force higher than 50 N (unless this solution Is combined with one at the other solutions);
— an automatically engaging restraint device keeping the door in the open position. it necessary combined with elements from the other solutions
5.2.4 Zone 4
For both type of machines. access to the mectiarwcal parts shall be prevented by movable interlocking or by fixed guards. The opening of movable guards shall stop the mechanical parts wiuile fixed guards shall be able to be removed only with the use of tools,
5.2.5 Zone 5
Accessible mobile parts of the fans shall be protected by a gad designed as a fixed guard and complying with
EN 2941992. Table 4.
5.3 ElectrIcal hazards
5.3.1 General
The electrical equipment shall comply with EN 60204-1 and with the following requirements.
5.3.2 Safety requirements related to electromagnetic phenomena
The machines shall have sufficient immuMy 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 intended by the manufacturer
The manufacturer of the machine shall des.gn, install and wwe the equipment and sub-assemblies takiog into account the recommendations of the suppliers of these sub-assemblies.
5.3.3 Protection against water ingress
The machine shal be designed considering the possibility of water ingress (e.g. overflowing, condensation) that can affect electrical safety. All the electrical components shall have a degree of protection IPX5 as defined in EN
60529:1991.
5.3.4 DIsconnecting device (see EN 60204-1)
A disconnecting device shell be fitted for separation of the energy source, according to EN 60204-1.
If It is not supplied andior installed by the manufacturer, the instruction handbook shall precise its specifications
and conditions of installation.
5.3.5 ProtectIon against electric shocks
Protection against direct and iodirect contact shall be ensured in compliance with EN 60204-1.
Operator interface control devices shall have a degree of protection IPX5, as defined in EN 60529:1991.
5.3.6 Emergency stop (see EN 60204-1)
Machines shall be fitted with one or more emergency stop devices, as far as the risk assessment of the manufacturer does not establish that such a device would not lessen the risk, either because it would not reduce the stopping time or because It would not enable the special measures reqared to deal with the risk to be taken.
if the risk assessment by the manufacturer allows him to conclude that no emergency stopping device is required. then a supply disconnecting device Ii accordance with EN 60204-1 shall be provided. It shall stop all the operations of the machine.
5.3.7 Motor enclosures (see EN 80204-1)
Motors with a degree of protection lower than 1P23 shall be mounted inside an enclosure that guarantees a
minimum degree of protection 1P23.
5.4 Thermal hazards
5.4.1 The opening of the inspection doors shall stop the water jets.
5.42 Direct access to healing elements shall be prevented (e.g. by a grid designed as a fixed guard and with openings in accordance with Table 4 of EN 294:1992.
5.4.3 The temperature of the external parts of the machine that can generally come into contact with the operator for no longer than 3s. shall not exceed the limit temperature of 65t for non-coated metal (accordrg to EN ISO
13732-1).
5.4.4 The over-heating of heating elements shall be prevented by a device complementary to the regulating system. e.g. by a temperature limiting device or a pressure switch.
5.5 ChemIcal hazards
The chemicals dosing system shall be designed and constructed for reducing as much as possible the risks related to contact with or inhalation of chemicals and vapours. The manufacturer shall design the machine in order to reduce the quantity of steam coming out of the machine, e.g. by curtains. If necessary, the manufacturer shall consider provisions for the extraction of vapours. The manufacturer shall include in the information for use instructions for the installation (see Clause 7).
If the system of distribution for the cleaning, the rinsing and disinfecting products is not made by the manufacturer of the dishwashing machine with conveyor, the machine manufacturer shall make provisions for the integration of the system in the machine, The manufacturer shalt include in the information for use instructions for the integration (see Clause 7).