DC Inverter U-match Series Duct Type Unit
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5.4.8 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:
(1) Become familiar with the equipment and its operation.
(2) Isolate system electrically.
(3) Before attempting the procedure ensure that:
1) Mechanical handling equipment is available, if required, for handling
refrigerant cylinders.
2) All personal protective equipment is available and being used correctly.
3) The recovery process is supervised at all times by a competent person.
4) Recovery equipment and cylinders conform to the appropriate standards.
(4) Pump down refrigerant system, if possible.
(5) If a vacuum is not possible, make a manifold so that refrigerant can be
removed from various parts of the system.
(6) Make sure that cylinder is situated on the scales before recovery takes place.
(7) Start the recovery machine and operate in accordance with manufacturer's
instructions.
(8) Do not overfill cylinders. (No more than 80 % volume liquid charge).
(9) Do not exceed the maximum working pressure of the cylinder, even
temporarily.
(10) 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.
(11) Recovered refrigerant shall not be charged into another refrigeration system
unless it has been cleaned and checked.
5.4.9 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.
