INVENTOR V7CRI-18WiFiR/U7RS-18 Installationshandbuch Seite 43

When the nal OFN charge is used, the system shall be vented down to atmospheric pressure
to enable work to take place. This operation is absolutely vital if brazing operations on the
pipe-work are to take place.
Ensure that the outlet for the vacuum pump is not closed to any ignition sources and there
is ventilation available.
16. Charging procedures
In addition to conventional charging procedures, the following requirements shall be followed:
Ensure that contamination of different refrigerants does not occur when using charging
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equipment. Hoses or lines shall be as short as possible to minimize the amount of
refrigerant contained in them.
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Cylinders shall be kept upright.
Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
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Label the system when charging is complete(if not already).
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Extreme care shall be taken not to over ll the refrigeration system.
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Prior to recharging the system it shall be pressure tested with OFN. The system shall be
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leak tested on completion of charging but prior to commissioning. A follow up leak test
shall 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 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;
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all personal protetive equipment is available and being used correctly;
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the recovery process is supervised at all times by a competent person;
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recovery equipment and cylinders conform to the appropriate standards.
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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.
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