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and disposal, during which flammable refrigerant can possibly be
released to the surrounding space. Prior to work taking place, the area
around the equipment is to 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 it is satisfactorily dealt with. If the fault
cannot be corrected immediately but it is necessary to continue
operation, an adequate temporary solution shall be used. This shall be
reported to the owner of the equipment so all parties are advised.
