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Safety precautions /
~
CAUTION
6-5
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
C02
fire extinguisher adjacent to the charging area.
6-6 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 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.
6-7
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.
6-8
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
-6-
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