Hantech 10474165 Mode D'emploi page 17

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.
9. 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 refrigerants 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 re-use 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, forhandling
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 refrigerant 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 refrigeration
system unless it has been cleaned
and checked.
10. 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.
11. 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 is available. All
cylinders to be used are designated
for the recovered refrigerant and
– 17 –