Black & Decker BXAC12000E Manuel D'utilisation page 13

Ensure that contamination of different refrigerants does
not occur when using charging equipment. Hoses or lines
shall be as short as possible to minimise the amount of
refrigerant contained in them.
Cylinders shall be kept upright.
Ensure that the refrigeration system is earthed prior to
charging the system with refrigerant.
Label the system when charging is complete (if not
already).
Extreme care shall be taken not to overfill the refrigeration
system.
Prior to recharging the system, it shall be pressure tested
with OFN. The system shall be leak tested on completion
of charging but prior to commissioning. A follow up leak
test shall be carried out prior to leaving the site.
DECOMMISSIONING
Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and all
its detail. It is recommended good practice that all refrig-
erants are recovered safely. Prior to the task being carried
out, an oil and refrigerant sample shall be taken in case
analysis is required prior to reuse of reclaimed refrigerant.
It is essential that electrical power is available before the
task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
mechanical handling equipment is available, if required,
for handling refrigerant cylinders; all personal protective
equipment is available and being used correctly; the
recovery process is supervised at all times by a competent
person; recovery equipment and cylinders conform to the
appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that re-
frigerant can be removed from various parts of the system.
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 equipment are closed off.
k) Recovered refrigerant shall not be charged into another
(Original instructions)
refrigeration system unless it has been cleaned and
checked.
LABELLING
Equipment shall be labelled stating that it has been de-
commissioned 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.
RECOVERY
When removing refrigerant from a system, either for
servicing or decommissioning, it is recommended good
practice that all refrigerants are removed safely. When
transferring refrigerant into cylinders, ensure that only
appropriate refrigerant recovery cylinders are employed.
Ensure that the correct number of cylinders for holding 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 shall be complete with pressure
relief valve and associated shutoff 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 leakfree 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 prevent ignition in the event of a refrigerant
release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the
refrigerant supplier in the correct recovery cylinder, and
the relevant Waste Transfer Note arranged. Do not mix re-
frigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed,
ensure that they have been evacuated to an acceptable
level to make certain that flammable refrigerant does not
remain within the lubricant. The evacuation process shall
be carried out prior to returning the compressor to the
suppliers. Only electric heating to the compressor body
shall be employed to accelerate this process. When oil is
drained from a system, it shall be carried out safely.
Competence of service personnel
General
Special training additional to usual refrigerating equipment
ENGLISH
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