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
manufacturer's 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 refrigera-
tion system unless it has been cleaned and checked.
15. Labelling
Equipment shall be labelled stating that it has been de- commis-
sioned 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.
16. 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 associat-
ed shut-off valves in good working order.
Empty recovery cylinders are evacuated and, if possible, cooled
before recovery occurs.
The recovery equipment shall be in good working order with a set
of instructions concerning the equipment that is at hand and shall be
suitable for the recovery of flammable refrigerants.
In addition, a set of calibrated weighing scales shall be available
and in good working order.
Hoses shall be complete with leak-free disconnect couplings and in
good condition.
Before using the recovery machine, check that it is in satisfactory
working order, has been properly maintained and that any associat-
ed electrical components are sealed to prevent ignition in the event
of a refrigerant release.
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