be surveyed to make sure that there are 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.
9. Checks to electrical devices:
Repair and maintenance to electrical components shall include initial safety
checks and component inspection procedures. If a fault exists that could
compromise safety, then no electrical supply shall be connected to the circuit until
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