15
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 equip-
ment are closed off.
k) Recovered refrigerant shall not be charged into another refrig-
eration 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 refrig-
erants are removed safely.
When transferring refrigerant into cylinders, ensure that only ap-
propriate refrigerant recovery cylinders are employed.
Make sure that the correct number of cylinders for holding the to-
tal system charge is available. All cylinders to be used are desig-
nated for the recovered refrigerant and labelled for that refriger-
ant (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.
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 associated electrical components are sealed to pre-
vent ignition in the event of a refrigerant release. Consult manu-
facturer if in doubt.