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sources of ignition, including cigarette smoke, should be kept sufficiently far from
the place of installation, repair, removal and disposal, during which flammable
refrigerant can be released into the surrounding space. Before starting work,
the area around the equipment should be inspected to ensure that there are no
flammable hazards or ignition hazards. No smoking signs must be put up.
7) Ventilation of the area
Make sure the work area is outdoors or is adequately ventilated before putting hands
to the system or conduct hot work. It is necessary to ensure adequate ventilation
during the period of execution of the work. Ventilation should disperse safely any
refrigerant released and preferably expel it externally to the atmosphere.
8) Controls for refrigeration equipment
When replacing electrical components, they must be fit for purpose and with the
correct specifications. The manufacturer’s maintenance and service guidelines
must be followed at all times. If in doubt, consult the technical assistance of a
qualified center. The following controls must be applied to systems using flammable
refrigerants: the size of the charge conforms to the size of the room where the
parts containing refrigerant are installed; machines and ventilation openings are
functioning properly and are not blocked; if an indirect refrigerant circuit is used,
the secondary circuit must be checked to verify the presence of refrigerant; the
marking on the equipment continues to be visible and legible. Illegible markings
and signs must be corrected; refrigeration pipe or components are installed in a
position where it is unlikely that they will be exposed to any substance that can
corrode components containing refrigerant, unless the latter are constructed with
materials that are intrinsically resistant to being corroded or adequately protected.
9) Control of electrical devices
Repair and maintenance of electrical components must include initial safety checks
and component inspection procedures. If there is a fault that could compromise
safety, do not connect any electrical power to the circuit until it is satisfactorily
addressed. If the fault cannot be corrected immediately but it is necessary to continue
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