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1.6. Prohibition of all sources of ignition:
No person carrying out work in connection with a refrigeration system involving the exposure of
piping containing or having contained flammable refrigerant must not use an ignition source
liable to create a risk of fire or explosion. All possible ignition sources, including cigarettes,
should be kept sufficiently far from the location of installation, repair, removal and disposal,
during which flammable refrigerant may possibly be released into the surrounding space. Before
starting work, the area around the equipment must be examined to ensure that there is no
danger of flammability or risk of ignition. "No smoking" signs must be prominently displayed.
1.7. Ventilated work area:
Make sure the area is open or properly ventilated before entering the system or performing hot
work.
Some ventilation must be maintained during the work. Aeration should safely disperse any
released refrigerant and preferably expel it outward into
the atmosphere.
1.8. Refrigeration equipment checks:
When electrical components are replaced, they must be fit for purpose and to appropriate
specifications. Always follow the manufacturer's guidelines for maintenance and service. If in
doubt, consult the manufacturer's technical department for assistance.
The following controls must be applied to installations using flammable refrigerants: the charge
corresponds to the dimensions of the room in which the rooms containing refrigerant are installed;
machines and air vents are functioning properly and are not blocked; if an indirect refrigeration
circuit is used, the secondary circuit must be checked in order to detect the presence of
refrigerant; the marking affixed to the equipment remains visible and legible. Illegible markings
and signs must be corrected; refrigeration pipes or components are installed in a position where
they are not likely to be exposed to a substance which could corrode components containing
refrigerant,
1.9. Checks of electrical devices:
Repair and maintenance of electrical components should include initial safety checks as well as
component examination procedures. In the event of a fault which could compromise safety, no
power supply should be connected to the circuit until the problem has been satisfactorily resolved.
If the fault cannot be corrected immediately but it is necessary to continue use, an adequate
temporary solution must be used. This problem should be reported to the owner of the equipment
so that all parties are aware.
The initial safety checks should include: discharging the capacitors: this should be done safely in
order to avoid any possibility of sparking; ensure that no live electrical components or wiring are
exposed when charging, recovering or purging the system; the presence of earth continuity.
2. REPAIRS OF SEALED COMPONENTS
2.1. When repairing sealed components, all power supplies should be disconnected from the
equipment being used before any removal of sealed covers, etc. If it is absolutely necessary to
have a power supply to the equipment during repair work, a continuously functional leak detection
technique must be at the most critical point to report any potentially hazardous situation.
EN-10
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