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Section 4 - OPERATION
© Copyright 2006 PREO SRL
All rights reserved
EAW530E2MV
Edition
03/2006
4.5 INTEGRATED FUNCTIONS
Other important microprocessor features are:
• Sequential heating of the various channels: when the system is switched on,
the tank, which constitutes the greatest volume of glue to be melted, is the
first component to be heated. When the tank temperature reaches half the
set-point value, the hoses and guns also being to be heated up. The
advantage of this is that the system components all reach the desired
temperature at the same time, saving energy and obtaining better hot-melt
conservation.
• Pump start: in order to avoid subjecting the pump to the working pressure
before the glue has completely melted, there is an internal safety device
that only enables the pump when the set temperature reaches the set-point,
enabling the machine ready green light. When the tank or other component
temperatures fall outside the set alarm range (-10°C +10°C) with respect to
the set-point, the glue dispensing is automatically disabled and the red
alarm light or yellow machine warming up light comes on.
• Signalling anomalies: in the event of interruption of the temperature probe
for any component, or in the event of a short-circuited probe, relative
anomaly signalling messages appear on the display in order to facilitate
troubleshooting operations.
• Economy function: lowers the temperature to a set value so as to keep the
glue liquid, but not at working temperature.
• Safety thermostat: the maximum temperature safety thermostat provides
additional protection, stopping the machine when the tank temperature
exceeds 230°C.
• Automatic scanning: when the machine is ready, the microprocessor (with a
time of 30 seconds per section) automatically scans the temperatures
measured and the relative set-points for the enabled channels only (with
set-point >0).
4.6 SETTING THE TANK TEMPERATURE
Turn the selector until reaching the position of the melting tank, which will begin to
flash.
Press the selector briefly until SET appears on the display then, turning the selector
itself, modify the set-point temperature within a range of settable values between
+2°C and +230°C.
The selector also has a virtual block that prevents you from exceeding 230°C.
Press the selector again to confirm the desired value and exit the programming
mode.
To deactivate the element, set a temperature of under 2°C. OFF will appear on the
display.
4.7 SETTING THE HOSE TEMPERATURES
Turn the selector until reaching the position of hose 1, which will begin to flash.
Press the selector briefly until SET appears on the screen then, turning the selector
itself, modify the set-point temperature within a range of settable values between
+2°C and +230°C.
The selector also has a virtual block that prevents you from exceeding 230°C.
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