English
9
Safety precautions
•
Electrostatic charge may accumulate and
create a hazardous condition when charging
and discharging the refrigerant.
To avoid fi re or explosion, dissipate static
electricity during transfer by grounding and
bonding containers and equipment before
charging/discharging.
10. Decommissioning
•
Before carrying out this procedure, it is
essential that the technician is completely
familiar with the equipment and all its details.
•
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 over fi ll 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 fi lled
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.
•
Electrostatic charge may accumulate and
create a hazardous condition when charging or
discharging the refrigerant.
To avoid fi re or explosion, dissipate static
electricity during transfer by grounding and
bonding containers and equipment before
charging/discharging.
11. 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 fl ammable
refrigerant.
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 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 shut-off valves in good
working order.
•
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 fl ammable
refrigerants.
•
In addition, a set of calibrated weighing scales
shall be available and in good working order.
•
Hoses shall be complete with leak-free
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 refrigerants 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 fl ammable 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.
To Next Page
Loading...
