Bosch Climate 5000 SCI Series Installation Manual page 26

Information on Servicing
16. Charging procedures
In addition to conventional charging procedures, the following
requirements must be met:
• Ensure that contamination of different refrigerants does not occur
when using charging equipment. Hoses or lines must be as short as
possible to minimize the amount of refrigerant contained in them.
• Cylinders must be kept upright.
• Ensure that the refrigeration system is earthed prior to charging the
system with refrigerant.
• Label the system when charging is complete (if not already).
• Extreme care must be taken not to overfill the refrigeration system.
• Prior to recharging the system it must be pressure tested with OFN.
The system must be leak tested on completion of charging but prior
to commissioning. A follow up leak test must be carried out prior to
leaving the site.
17. 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 must
be taken.
If an 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 protetive 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 must not be charged into another refrigeration
system unless it has been cleaned and checked.
18. Labelling
Equipment must be labelled stating that it has been decommissioned
and emptied of refrigerant. The label must be dated and signed. Ensure
that there are labels on the equipment stating the equipment contains
flammable refrigerant.
26
19. Recovery
• When removing refrigerant from a system, either for service or
decommissioning, it is recommended good practice that all refriger-
ants are removed safely.
• When transferring refrigerant into cylinders, ensure that only appro-
priate 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 must 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 order with a set of
instructions concerning the equipment that is at hand and must be
suitable for the recovery of flammable refrigerants. In addition, a set
of calibrated weighing scales must be available and in good working
order.
• Hoses must 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 must 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 flammable refrigerant does not remain within the lubricant.
The evacuation process must be carried out prior to returning the
compressor to the suppliers. Only electric heating of the compres-
sor body must be employed to accelerate this process. When oil is
drained from a system, it must be carried out safely.
20. Transportation, marking and storage for units
1. Transport of equipment containing flammable refrigerants
Compliance with the transport regulations
2. Marking of equipment using signs
Compliance with local regulations
3. Disposal of equipment using flammable refrigerants
Compliance with national regulations
4. Storage of equipment/appliances
The storage of equipment should be in accordance with the
manufacturer's instructions.
5. Storage of packed (unsold) equipment
Storage package protection should be constructed such that
mechanical damage to the equipment inside the package will not
cause a leak of the refrigerant charge.
The maximum number of pieces of equipment permitted to be
stored together will be determined by local regulations.
Climate 5000 SCI – 6720887422 (2019/07)