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Fral FSC25HP.4.3001 Manuel Technique page 36

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7.9
Labelling
7.10
Recovery
carrying out the work, oil and cooling fluid samples must be taken in case an analysis is required
before using the cooling fluid again.
It is essential that electricity is available before starting work.
Before carrying out this procedure, it is essential that the technician is totally familiar with the
apparatus and all its details. It is good practice that all refrigerant fluids are safely stored. Before
carrying out the work, oil and cooling fluid samples must be taken in case an analysis is required
before using the cooling fluid again.
It is essential that electricity is available before starting work.
a) Become familiar with the apparatus and its operation
b) Isolate the system from an electrical point of view.
c) Before trying the procedure, make sure that
a mechanical manoeuvring device is available, if required, to handle the refrigerant
fluid cylinders;
all personal protective equipment is available and used correctly;
that the recovery process is constantly under the control of a competent person;
the recovery apparatus and the cylinders comply with the relevant standards.
d) Depressurize the cooling system, if possible.
e) If the vacuum cannot be obtained, connect a manifold so that the refrigerant fluid can be removed
from various parts of the system.
f) Make sure that the cylinder is located on the scale before recovery takes place.
g) Start the recovery unit and operate it according to the manufacturer's instructions.
h) Do not overfill the cylinders (no more than 80% by volume of the refill liquid).
i) Do not exceed, even temporarily, the maximum operating pressure of the cylinder.
j) When the cylinders have been correctly filled and the process is finished, check that the cylinders
and the equipment are removed promptly from the site and that all the isolation valves of the
appliance are closed.
k) Recovered refrigerant fluids must not be loaded into another refrigeration system unless they
have been cleaned and checked.
The appliances must bear a label stating that they have been taken out of service and emptied of
the refrigerant fluid. The label must be dated and signed. Make sure that labels have been affixed
to the appliance stating that the appliance contains a flammable refrigerant.
When removing refrigerant fluids from a system, either for maintenance or for decommissioning, it
is good practice that this is done safely.
When transferring the refrigerant fluid into the cylinders, check that only cylinders suitable for the
recovery of refrigerant fluids are used. Make sure that the exact number of cylinders is available to
contain the total refill of the system. All cylinders to be used are designated for the refrigerant fluid
kept and labelled for that refrigerant fluid (i.e., cylinders for the storage of the refrigerant fluid). The
cylinders must be complete with a pressure relief valve and associated shut-off valves, in good
working order. The empty guard cylinders are withdrawn and, if possible, cooled before recovery
occurs.
The recovery apparatus must be in good operating condition with a series of instructions relating to
the apparatus being managed and must be suitable for the recovery of flammable refrigerating
fluids. A set of calibrated weighing scales must also be available. The pipes must be equipped with
connectors for disconnection that do not leak and are in good operating condition. Before using the
recovery machine, check that it is in a satisfactory condition of use, that it has had proper
maintenance and that any associated electrical components are sealed to prevent ignition in case
of leakage of refrigerant fluid. Consult the manufacturer if in doubt.
The recovered refrigerant fluid must be returned to the supplier of the refrigerant fluid in the
appropriate recovery cylinder, drawing up the relative Waste Transfer Note. Do not mix the
refrigerant fluids in the recovery units and, in particular, not in the cylinders.
If the compressors or their oils need to be removed, make sure they have been emptied to an
acceptable level to ensure that the flammable refrigerant fluid does not remain in the lubricant. The
36
M.FSC25HP.4.3001-01 Manual _ITA_UK_DE_FR_ES - 01/08/2023

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