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8 IMPORTANT SAFETY INSTRUCTIONS
e) If a vacuum is not possible, make a
manifold so that refrigerant can be
removed from various parts of the
system.
f) Make sure that cylinder is situated on the
scales before recovery takes place.
g) Start the recovery machine and operate
in accordance with instructions.
h) Do not overfill cylinders. (No more than
80% volume liquid charge).
i) Do not exceed the maximum working
pressure of the cylinder, even
temporarily.
j) When the cylinders have been filled
correctly and the process completed,
make sure that the cylinders and the
equipment are removed from site
promptly and all isolation valves on the
equipment are closed off.
k) Recovered refrigerant shall not be
charged into another refrigeration system
unless it has been cleaned and checked.
14.
Labelling
Equipment shall be labelled stating that it
has been de-commissioned and emptied
of refrigerant. The label shall be dated
and signed. Ensure that there are labels
on the equipment stating the equipment
contains flammable refrigerant.
15. Recovery
When removing refrigerant from a
system, either for servicing or
decommissioning, it is recommended
good practice that all refrigerants are
removed safely. When transferring
refrigerant into cylinders, ensure that only
appropriate refrigerant recovery
cylinders are employed. Ensure that the
correct number of cylinders for holding
the total system charge is available. All
cylinders to be used are designated for
the recovered refrigerant and labelled for
that refrigerant (i.e. special cylinders for
the recovery of refrigerant). Cylinders
shall be complete with pressure relief
valve and associated shut-off valves in
good working order. Empty recovery
cylinders are evacuated and, if possible,
cooled before recovery occurs.
12. Charging procedures
In addition to conventional charging
procedures, the following requirements
shall be followed. Ensure that
contamination of different refrigerants
does not occur when using charging
equipment. Hoses or lines shall be as
short as possible to minimise the amount
of refrigerant contained in them.
Cylinders shall be kept in an appropriate
position according to the instructions.
Ensure that the refrigeration system is
earthed prior to charging the system with
refrigerant. Label the system when
charging is complete (if not already).
Extreme care shall be taken not to overfill
the refrigeration system. Prior to
recharging the system it shall be pressure
tested with OFN. The system shall be leak
tested on completion of charging but
prior to commissioning. A follow up leak
test shall be carried out prior to leaving
the site.
13. Decommissioning
Before carrying out this procedure, it is
essential that the technician is completely
familiar with the equipment and all its
detail. It is recommended good practice
that all refrigerants are recovered safely.
Prior to the task being carried out, an oil
and refrigerant sample shall be taken in
case analysis is required prior to re-use of
reclaimed refrigerant. It is essential that
electrical power is available before the
task is commenced.
a) Become familiar with the equipment and
its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure
that: Mechanical handling equipment is
available, if required, for handling
refrigerant cylinders; All personal
protective equipment is available and
being used correctly; The recovery
process is supervised at all times by a
competent person; Recovery equipment
and cylinders conform to the appropriate
standards.
d) Pump down refrigerant system, if
possible.
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