Beisler 1225-4 - Manual (Page 14)

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3.5 Adjust air pressure
The machine needs an air pressure between 5 and 6 bar. This is adjusted at
the air supply unit:
1 Air connecting hose
2 Control to adjust the air pressure
3 Pressure gauge
4 Collector for condensing water
5 Release valve for condensed water
Check the air pressure at the pressure gauge (3). If the indicated value
differs from 6 bar, adjust the pressure by turning the black control (2).
4 Operation of the sewing head
The operation of the sewing head is explained in the separate manual of the
sewing head, which is part of the machine’s documentation.
Please obtain all rules and regulations.