8
Safety Precautions
2-4. Presence of fi re extinguisher
•
If any hot work is to be conducted on the
refrigerating equipment or any associated
parts, appropriate fire extinguishing
equipment shall be available at hand.
•
Have a dry powder or CO
2
fi re extinguisher
adjacent to the charging area.
2-5. No ignition sources
•
No person carrying out work in relation to a
refrigerating 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 can lead to
the risk of fire or explosion. They must not be
smoking when carrying out such work.
•
All possible ignition sources, including
cigarette smoking, should be kept suffi ciently
far away from the site of installation,
repairing, removing and disposal, during
which fl ammable 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 fl ammable hazards or
ignition risks.
•
“No Smoking” signs shall be displayed.
2-6. 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.
2-7. Checks to the refrigerating equipment
•
Where electrical components are being
changed, they shall be fi t for the purpose and
to the correct specifi cation.
•
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 fl ammable refrigerants.
-
The actual refrigerant charge 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.
-
Refrigerating pipe or components are
installed in a position where they are
unlikely to be exposed to any substance
which can corrode refrigerant containing
components, unless the components
are constructed of materials which are
inherently resistant to being corroded or
are properly protected against being so
corroded.
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