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an appropriate position according to the instructions. Ensure that the refrigera-
tion 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.
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 prompt-
ly and all isolation valves on the equipment are closed of.
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 emp-
tied of refrigerant. The label shall be dated and signed.
Ensure that there are labels on the equipment stating the equipment contains
flammable refrigerant.
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