Definitons Of The Functions - LERICA LEVAC C30 M8 Mode D'emploi Et D'entretien

VACUUM CHAMBER
PACKAGING MACHINES
5.5 DEFINITIONS OF THE FUNCTIONS
5.5.1 GAS FUNCTION (OPTIONAL)
Product packaging by flushing with gas is available as optional. The GAS option makes it possible to pack delicate products without pressing due to
pressure difference. To compensate for this pressure difference, the air is replaced with a controlled gas mixture generally consisting of 30%
carbon dioxide and 60% nitrogen. It is also possible to use antioxidant gas mixtures which help prolong the shelf-life. To select the suitable mixture,
consult the information leaflet of the best gas production Companies.
The maximum permitted percentage of gas is 60%. This percentage represents the chamber volume occupied by the gas. Beyond the 60% limit, the
pressure exerted by the sealing bar on the bag may be insufficient and bag sealing may be defective. If the cover opens during the cycle, reduce
the gas flushing time.
5.5.2 SEALING FUNCTION (SEAL)
After vacuum creation and gas flushing (if envisaged), the machine proceeds with bag sealing by means of the sealing bar provided with sealing
wire. The sealing time varies according to the bag basic weight, environmental temperature and the quantity of work to be done. In any case, the seal
seam on the bag must be uniform, clearly marked, without melted points. Set a sealing time suitable for the bag, approximately between 2 and 4
seconds.
5.5.3 SOFTAIR FUNCTION (OPTIONAL)
Slow devacumation in the vacuum chamber after bag sealing makes it possible to pack delicate products or products with sharp cutting edges (e.g.
hard cheeses, speck, raw ham, ribs etc.) thereby avoiding damage to the bags due to excessively rapid decompression.
For packing cheese segments it is advisable to smooth the edges.
The optimum value can be determined after a few test runs before packaging the product in series.
5.5.4 JARS FUNCTION (A)
With the JARS function, it is possible to create vacuum in external containers (vacuum box) in models provided with a special valve or pack
channelled bags that are longer than the standard dimensions permitted by the vacuum chamber, outside the machine.
The JARS function is activated by means of the JARS key. The function is deactivated manually after the maximum vacuum is achieved, measured
by the vacuum gauge.
5.5.5 STOP FUNCTION
Pressing the STOP button will cause the machine to interrupt the function in progress immediately and proceed with the next one. It is particularly
suitable for avoiding liquids extraction or incorrect positioning of bags. In case of an emergency, turn off the machine using the main switch.
REV. 00 - Cod.: 1500228
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INSTALLATION
Operation and maintenance manual / Ed. 10 - 2005
GB
GB