10
The area shall be checked with an appropriate refrigerant detector prior to and during
work, to ensure the technician is aware of potentially flammable atmospheres. Ensure
that the leak detection equipment being used is suitable for use with flammable
refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
04 Checking for presence of refrigerant
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.
05 Presence of fire extinguisher
No person carrying out work in relation to a refrigeration system which involves
exposing any pipe work that contains or has contained flammable refrigeration 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 installation, 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.
06 No ignition sources
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 refrigeration equipment.
07 Ventilated area
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:
08 Checks to the refrigeration equipment
The charge size is in accordance with the room size within 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.
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