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Section 4 - OPERATION
© Copyright 2006 PREO SRL
All rights reserved
EAW530E2MV
Edition
03/2006
4.10 SETTING THE PUMP REVOLUTIONS
Turn the selector until reaching the gear pump symbol on position, which will begin
to flash. SPD will appear on the display.
Press the selector briefly until SET appears on the display then, turning the selector
itself, modify the number of pump revolutions within a range of settable values
between 2 and 99.
This value indicates a hypothetical scale of 1 to 100 (expressed as a percentage),
comparable to a traditional potentiometer that regulates pump revolutions.
Press the selector again to confirm the desired value and exit the programming
mode.
By setting the value at 0, the pump motor will automatically be switched off. OFF
will appear on the display.
4.11 DISPLAYING THE PRESSURE (OPTIONAL)
By turning the selector until BAR appears on the display, the pressure of the
adhesive will be shown on the display, expressed in bar. This display is comparable
to a traditional digital pressure gauge, indicating the adhesive pressure in bar.
4.12 QUICK RELEASE AND PRESSURE REGULATION VALVE (OPTIONAL)
This particular device serves a dual purpose within the system.
A safety purpose and an operational purpose.
Its safety purpose consists of automatically discharging any pressure still present in
the system when it is switched off.
Its operational purpose, on the other hand, lies in the possibility to regulate (as
illustrated in figure 21) the pressure of the air feeding the valve, thus preventing
the adhesive pressure from exceeding a set value, keeping it constant.
Figure 21
Precise valve calibration, together with the regulation of the number of pump
revolutions, allows the system to dispense the adhesive in a precise, constant and