IM2023
52
h) Do not exceed the maximum operating pressure of the cylinder, even temporarily.
i) After proper filling of the cylinders and completion of the process, make sure that the
cylinders and equipment are removed from the procedure site and that all shut-off
valves on the equipment are closed.
j) The extracted cooling agent shall not be refilled into another cooling system unless it
has been cleaned and checked.
18. Marking
The marking shall indicate that the equipment has been decommissioned and that
cooling agent has been emptied. The label shall contain date and signature. Ensure
that the equipment contains labels that denote that it contains a highly flammable
cooling agent.
19. Cooling agent extraction
The staff shall have extensive experience in extraction of the cooling agent safely
during equipment maintenance or decommissioning.
When injecting the cooling agent into the cylinders, ensure the use of the appropriate
cylinders. Ensure that the required number of cylinders is available to store the total
system charge. Make sure that all the used cylinders are designed for the extracted
cooling agent and have the marking appropriate for this type of cooling agent (i.e.
special cylinders for the cooling agent extraction). The cylinders shall be equipped with
a pressure relief valve and corresponding shut-off valves in proper working condition.
Empty cylinders shall be vacuumed and, if possible, cooled prior to the start of the
cooling agent pumping process.
The pumping equipment shall be in proper working condition; it shall have a set of
necessary instructions; and it shall be suitable for the extraction of flammable cooling
agents.
In addition, a set of calibrated scales shall be available and shall be in proper working
condition. The hoses shall be complete with sealed disconnecting couplings and shall
be in proper condition.
Before using the device to pump out the cooling agent, make sure that it is in a
satisfactory working condition, and that all relevant electrical components are sealed to
prevent fire in case of cooling agent release. In case of any doubts, please contact the
manufacturer.
The collected cooling agent shall be returned to the supplier of the cooling agent in a
proper container, with an appropriate waste material transfer invoice. Do not mix
cooling agents in drain installations and especially in cylinders.
In case of necessity to remove the compressors or compressor oils, make sure that
they have been pumped out to an acceptable level to ensure that no flammable cooling
agent remains in the oiling. The pumping process shall be carried out before returning
the compressor to the supplier. In order to speed up this process, use only electric
heating of the compressor housing. Handle the oil safely after its extraction from the
system.
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