flammable refrigerants, i.e. non-sparking, adequately sealed or
intrinsically safe.
5) Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment
or any associated parts, appropriate fire extinguishing
equipment shall be available to hand. Have a dry powder or CO2
fire extinguisher adjacent to the charging area.
6) No ignition sources
No person carrying out work in relation to a refrigeration system
which involves 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
repairing, removing 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
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