05
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.
Before carrying out this procedure, it is essential
that the technician is completely familiar with the
equipment and all its detail. It is recommended
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 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 the cylinder is situated on the
scales before recovery takes place.
g) Start the recovery machine and operate it in
accordance with the 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 has been 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.
Equipment shall be labeled 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 that the equipment contains flammable
refrigerant.
When removing refrigerant from a system, either
for servicing or decommissioning, it is
recommended 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
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. Empty recovery cylinders are evacuated
and, if possible, cooled before recovery occurs.
The recovery equipment must be in good
working and come with a set of instructions for
proper usage. Futhermore, the equipment
should be suitable for safely recovering
flammable refrigerants. If in doubt, the
manufacturer should be consulted. 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.
The recovered refrigerant shall be processed
according to local legislation 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 be certain that
flammable refrigerant does not remain within the
lubricant. The compressor body shall not be
heated by an open flame or other ignition
sources to accelerate this process. When oil is
drained from a system, it shall be carried out
safely.
Do not use the air conditioner for other
purposes. In order to avoid any quality
deterioration, do not use the unit for the cooling
of precision instruments, food, plants, animals or
works of art. Before cleaning, be sure to stop the
operation, turn the breaker off or unplug the
supply cord. Otherwise, electric shock and injury
may occur.
In order to avoid electric shock or fire, make sure
that an ground leak detector is installed.
Never put any objects into the air inlet or outlet.
Never inspect or service the unit by yourself.
Ask a qualified service person to perform this
task.
Do not dispose of this product as unsorted
municipal waste. This waste should be collected
separately for special treatment. Do not dispose
of electrical appliances as unsorted municipal
waste. Use separate collection facilities. Contact
your local government for information regarding
the connection systems available.
If electrical appliances are disposed of in landfills
or dumps, hazardous substances can leak into
the groundwater and get into the food chain,
harming your health and well-being.
To prevent refrigerant leak, contact your dealer.
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