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A12C
no flammable hazards or ignition risks. "No Smoking" signs shall be
displayed.
7) Ventilated area
Ensure that the area is in the open or that it is adequately ventilated
before breaking into the system or conducting any hot work. A
degree of ventilation shall continue during the period that the work
is carried out. The ventilation should safely disperse any released
refrigerant and preferably expel it externally into the atmosphere.
8) Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for
the purpose and to the correct specification. At all times the
manufacturer's maintenance and service guidelines shall be
followed. If in doubt consult the manufacturer's technical
department for assistance.
The following checks shall be applied to installations using
flammable refrigerants:
– The charge size is in accordance with the room size within which
the refrigerant containing parts are installed;
– The ventilation machinery and outlets are operating adequately
and are not obstructed;
– If an indirect refrigerating circuit is being used, the secondary
circuit shall be checked for the presence of refrigerant;
– Marking to the equipment continues to be visible and legible.
Markings and signs that are illegible shall be corrected;
– Refrigeration pipe or components are installed in a position where
they are unlikely to be exposed to any substance which may corrode
refrigerant containing components, unless the components are
constructed of materials which are inherently resistant to being
corroded or are suitably protected against being so corroded.
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