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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.
14.Decommissioning
Before carrying out this procedure, it is essential that the technician is com-
pletely 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 ana-
lysis 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 sys-
tem electrically. c) Before attempting the procedure ensure that: Mechanical
handling equipment is available, if required, for handling refrigerant cylin-
ders;All personal protective equipment is available and being used correctly;
The recovery process is supervised at all times by a competent person; Re-
covery equipment and cylinders conform to the appropriate standards. d)
Pump down refrigerant system, if possible. 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 reco-
very takes place. g) Start the recovery machine and operate in accordance
with manufacturer's instructions. h) Do not overfill cylinders. (No more than
80 % volume liquid charge). i) Do not exceed the maximum working pres-
sure of thecylinder, 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.
15.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 flam-
mable refrigerant.
16.Recovery
When removing refrigerant from a system, either for servicing or decommis-
sioning, it is recommended good practice that all refrigerants are removed
safely. When transferring refrigerant into cylinders, ensure that only appro-
priate refrigerant recovery cylinders are employed. Ensure that the correct
number of cylinders for holding the total system charge is available. All cy-
linders to be used are designated for the recovered refrigerant and labelled
ENG
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