Whirlpool 20K Manual Del Usuario página 41

prior to conducting work on the
system.
6-2 Work procedure
Work shall be undertaken under
a controlled procedure so as to
minimize the risk of flammable gas
or vapour being present while the
work is being performed.
6-3 General work area
All maintenance staff and others
working in the local area shall be
instructed on the nature of work
being carried out. Work in confied
spaces shall be avoided. The area
around the workspace shall be
sectioned off. Ensure that the
conditionswithin the area have been
made safe by control of flammable
material.
6-4 Checking for presence of refrigerant
The area shall be checked with an
appropriate refrigerant detector
prior to and during work, to ensure
the technician is aware of prtentially
flammable atmospheres. Ensure
that hte leak detection equipment
being used is suitable for use with
flammable refrigerants, i.e. non-
sparking adequately sealed or
intrinsically safe.
6-5 Presence of fire extinguisher
If any hot work is to be conducted on
the refrigeration equipment or any
associated partsappropriate fire
extinguishing equipment shall be
avalaible to hand. Have a dry powder
or CO fire extinguisher adjacent to
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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;
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