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minimise the amount of refrigerant contained in them. Cylinders shall be kept
upright. 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.
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DECOMMISSIONING
Before carrying out this procedure, it is essential that the technician is completely
familiar with the equipment and all its detail. lt 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. lt is essential that 4 GB electrical power is available before
the task is commenced.
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l)
10 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.
11 RECOVERY
When removing refrigerant from a system, either for servicing or decommissioning,
il 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 are 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
4
108
Become familiar with the equipment and its operation.
lsolate system electrically.
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.
Pump down refrigerant system, if possible. g) lf a vacuum is not possible,
make a manifold so that refrigerant can be removed from various parts
of the system. h) Make sure that cylinder is situated on the scales before
recovery takes place.
Start the recovery machine and operate in accordance with manufacturer's
instructions.
Do not overfill cylinders. (No more than 80 % volume liquid charge).
Do not exceed the maximum working pressure of the cylinder, even
temporarily.
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. m)
Recovered refrigerant shall not be charged into another refrigeration
system unless it has been cleaned and checked.
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