Amsta AMCLI180E Notice D'utilisation page 37

9. TAKING OUT OF SERVICE
Before performing this procedure, it is essential that the technician is familiar with the equipment
and all of its details. It is recommended, in accordance with good practice, to recover all
refrigerants safely. Before performing the task, an oil and refrigerant sample should be taken in
case analysis is required before reusing the recovered refrigerant. It is essential that the power
supply is available before the start of the task.
a) Familiarize yourself with the equipment and its operation.
b) Isolate the system electrically.
c) Before starting the procedure, make sure that: mechanical handling equipment is available, if
necessary, for handling the refrigerant cylinders; all personal protective equipment is available and
used correctly; the recovery process is continuously supervised by a competent person; recovery
equipment and cylinders meet appropriate standards.
d) Pump the refrigerant system, if possible.
e) If vacuum is not possible, create a manifold so that refrigerant can be drained from different
parts of the system.
f) Make sure the bottle is placed on the scale before recovery.
g) Start the recovery machine, then operate according to the manufacturer's instructions.
h) Do not overfill the bottles (no more than 80 % volume in liquid charge).
i) Do not exceed the maximum operating pressure of the cylinder, even temporarily.
j) When the cylinders have been properly filled and the process is complete, ensure that the
cylinders and equipment are properly removed from the site and that all equipment isolation
valves are closed.
k) Recovered refrigerant should not be charged into another refrigeration system unless it has
been cleaned and checked.
10. LABELING
Equipment should be labelled with a label indicating that it has been removed from service and
emptied of refrigerant. The label must be dated and signed.
Make sure the equipment has labels indicating that the equipment contains flammable refrigerant.
11. RECOVERY
When emptying refrigerant from a system, whether for repair work or decommissioning, it is
recommended that all refrigerants be drained safely. When transferring refrigerant into cylinders,
be sure to use only suitable refrigerant recovery cylinders.
Make sure that the correct number of cylinders to hold the total system charge are 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 must be fitted with a pressure
relief valve and associated shut-off valves in good working order. Empty recovery bottles are
disposed of and, if possible, cooled before recovery.
Recovery equipment should be in good working order with a set of equipment instructions
available and should be suitable for the recovery of flammable refrigerants.
In addition, a set of calibrated scales must be available and in good working order. The pipes must
be complete with disconnected fittings without leaks and in good condition. Before using the
recovery machine, make sure that it is in good working order, properly maintained, and that all
associated electrical components are sealed to prevent ignition if refrigerant is released. Consult
the manufacturer if in doubt.
The recovered refrigerant should be returned to the refrigerant supplier in the appropriate recovery
cylinder, and the corresponding waste transfer ticket should be prepared. Do not mix refrigerants
in the recovery units and in particular in the bottles.
If compressors or compressor oils need to be disposed of, make sure they have been vented to
an acceptable level to ensure that flammable refrigerant does not remain in the lubricant. The
evacuation process should be done before returning the compressor to the suppliers. Only an
electric heater of the compressor body should be used to speed up this process. When oil is
drained from a system, it must be done safely.
EN-12