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can be released into the surrounding space. Before work starts, the area around the
equipment must be thoroughly examined to ensure that no danger or risk of ignition
is present. "No Smoking" signs must be displayed.
1.7. Ventilation
Ensure that the area is outdoors or adequately ventilated before intervening in the
system or carrying out any work at high temperature. Proper ventilation must be kept
at all times during work. Ventilation should safely disperse any refrigerant released
and preferably expel it externally to the atmosphere.
1.8. Verification of refrigeration equipment
When electrical components are replaced, they must be fit for purpose and to the
correct specification. The manufacturer's maintenance and service guidelines
must be followed at all times. In case of doubt, refer to the manufacturer's technical
department for assistance.
The following checks must be applied to installations using flammable refrigerants:
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The load size is in accordance with the size of the room where refrigerant-
containing parts are installed.
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Ventilation machinery and outlets can be properly operated and are unobstructed.
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If an indirect cooling circuit is used, the secondary circuit must be checked for
refrigerant presence.
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Equipment marking remains visible and legible. Illegible markings and symbols
should be corrected.
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The components or refrigerant piping are installed in a position where they are
not susceptible to exposure to any substance that may corrode the refrigerant-
containing components, unless the components are made of materials that are
inherently resistant to corrosion or are properly protected against it.
1.9. Verification of electrical devices
Repair and maintenance of electrical components should include initial safety checks
and component-inspection procedures. If there is a fault that may compromise safety,
then no power supply should be connected to the circuit until the fault is satisfactorily
dealt with. If the fault cannot be corrected immediately, but continued operation is
necessary, a suitable temporary solution must be used. This should be reported to the
owner of the equipment so as to inform all parties.
During initial safety checks, make sure
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that capacitors are unloaded–this must be done in a safe manner to avoid sparks;
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that no live wiring or electrical components are exposed while loading, recovering,
or purging the system;
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that there is continuity in the earth connection.
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