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ves exposing any pipe work that contains or has contained flammable
refrigerant shall use any sources of ignition in such a manner that it may
lead to the risk of fire or explosion. All possible ignition sources, including
cigarette smoking, should be kept sufficiently far away from the site of ins-
tallation, repairing, removing and disposal, during which flammable refrige-
rant 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 exter-
nally 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 refri-
gerant 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 seconda-
ry 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 mate-
rials which are inherently resistant to being corroded or are suitably protec-
ted 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 cir-
cuit until it is satisfactorily dealt with. If the fault cannot be corrected im-
mediately 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.
Initial safety checks shall include:
That capacitors are discharged: this shall be done in a safe manner to
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