Nimbus Compact M NET R32 Installation Manual UK

Decommissioning
8. Decommissioning
Prior to performing this procedure, it is imperative for the technician
to fully understand the equipment and all its details.
We recommend recovering all the refrigerants safely.
Prior to performing the activity, a specimen of the oil and refrigerant
must be drawn if these substances must be analysed
before the recovered refrigerant is used again.
Electricity must be available before the activity starts.
Familiarise with the equipment and its operation.
Isolate the system electrically.
Before proceeding:
– Make sure that all personal protective equipment is
available and is used correctly.
– Make sure that the recovery process is always supervised
by a competent person.
– Make sure that the recovery equipment and the cylinders
conform to the appropriate standards.
8.1 Draining the circuit and recovering the
refrigerant
To correctly recover the refrigerant from the system, the following
standard indications must be observed:
– When the refrigerant is transferred to the cylinders,
make sure that only appropriate refrigerant recovery
cylinders are used. Make sure that the correct number
of cylinders is available for maintaining the system’s
total charge. The cylinders must be complete with the
pressure limiting valve and the relative shut-off valves in
efficient working order. The vacuum recovery cylinders
must be drained and, if possible, cooled before the recovery
operations begin.
– The recovery equipment must be in good working order.
Moreover, a set of calibrated scales must be available
and in good working order. The flexible hoses must
be complete with the disconnection joints without
leakages and in good working order. Before using the
recovery machine, check that it is in efficient working
order, that it has been adequately serviced and that all
the associated electrical components are sealed to prevent
ignition in case of refrigerant leakages. Contact the
manufacturer in case of doubts.
– The refrigerant recovered must be returned to the refrigerant
supplier in the correct recovery cylinder and
the relevant waste transfer note must be drawn up. Do
not mix the refrigerants in the recovery units and, above
all, in the cylinders.
– If the compressors or the compressor oils must be removed,
make sure that they have been drained to an
acceptable level so that no flammable refrigerant remains
inside the lubricant. The drainage process must
be carried out before returning the compressor to the
suppliers. Only the electrical heating of the compressor
body must be used to speed up this process. Whenever
oil is drained from a system, the procedure must be carried
out in safe conditions.
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Equipment shall be labelled stating that it has
been de-commissioned and emptied of refrigerant.
The label shall be dated and signed.
For appliances containing flammable refrigerants,
ensure that there are labels on the equipment
stating the equipment contains flammable
refrigerant.
78 / EN