20 / 87 EN
Air-conditioners / User’s Manual
Prior to recharging the system, it shall be
pressure-tested with the appropriate purging
gas.
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.
2.10 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, 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 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.
2.11 Labelling
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.
2.12 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
2
Maintenance instruction
