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6. Ventilated areas
Make sure the area is outdoors or sufficiently ventilated before entering the system or operating a hot
wok. A certain degree of ventilation must be maintained during the work. Ventilation must safely
disperse any refrigerant released and preferably expel it to the outside into the atmosphere.
7. Refrigeration equipment checks
When electrical components are modified, they must be suitable for their intended use and meet the
correct specification. At all times, the manufacturer's maintenance and service guidelines must be
followed. If in doubt, consult the manufacturer's technical service for assistance.
The following controls must be applied to installations using flammable refrigerants :
- the size of the charge as a function of the size of the room in which the rooms containing the
refrigerant are installed ;
- machines and ventilation outlets are working properly and are not obstructed.
8. Electrical device checks
Repair and maintenance of electrical components should include initial safety checks and component
inspection procedures. If there is a defect that could compromise safety, no electrical supply shall be
connected to the circuit until it has been satisfactorily remedied. If the defect cannot be rectified
immediately but it is necessary to continue operation, a suitable temporary solution must be used. This
situation shall be reported to the owner of the equipment so that all parties are informed.
Initial security checks should include :
- that the capacitors are discharged: this must be done in a safe way to avoid any possibility of sparks ;
- that no live electrical components or wiring are exposed when charging, recovering or purging the
system ;
- that there is continuity of grounding.
9. Repairs to hermetic components
When repairing sealed components, all power supplies must be disconnected from the equipment being
worked on before any removal of sealed covers, etc.
If it is absolutely necessary to have a power supply for the equipment during servicing, some form of
continuously operating leak detection should be located at the most critical point to warn of a potentially
hazardous situation.
Particular attention must be paid to the following points to ensure that when working on electrical
components, the enclosure is not modified in such a way that the level of protection is affected. This
includes damage to cables, excessive number of connections, terminals not conforming to the original
specifications, damage to seals, incorrect installation of cable glands, etc.
Make sure that the device is mounted securely.
Make sure that seals or sealing materials have not degraded to the extent that they are no longer used
to prevent the ingress of flammable atmospheres. Spare parts must comply with the manufacturer's
specifications.
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