10-4
Optional Parts and Equipment
Low temperature setback
Low Temperature Setback provides a means to reduce the temperature
of the heating channels without changing all of their setpoints or without
shutting the unit down. It is especially useful when normal operations
must be interrupted for a while. The adhesive in the system can be kept
hot during such periods but at a lower temperature, thus reducing the
amount of char that will form when the system is idle and reducing
energy consumption as well.
r
-1
Figure 10.2 - Controls and Indicators on
Units with Low Temperature Setback:
1 ON/OFF lndiscaot (Yellow LED)
2 GWOFF Toggle Switch
3 Dial for Setting Amount of Temperature
Setback
The Low Temperature Setback feature is activated by a toggle switch
on the control panel of the applicator (see Figure 10.2). Once the
switch is turned on, a yellow LED on the control panel and the lower
half of the power indicator lamp on the front of the unit will begin to
flash. They will continue to flash as long as the applicator is in the
setback mode of operation. The amount by which the temperature is to
be set back is determined by turning a dial potentiometer, which is
located on the control panel. The setback range is adjustable from 60’F
(16X) to 150’F (66X). If, for example, the temperature is set back by
70’F (21X), the temperature on all channels will be reduced by this
amount.
As soon as the temperature setback feature is turned on, the yellow
LED’s for the tank, hoses,and guns will go off because the unit is
cooling down, but when the setback temperature is reached, the yellow
LED’s will begin flashing, just as they do at the normal operating
setpoints. The pump, however, will not operate when the applicator is in
the setback mode because the pump solenoid valve is disabled.
A special feature can be obtained with Digital Readout: a plug on the
circuit board for activating the temperature setback mode of operation
remotely and automatically instead of manually by a switch on the
control panel.
Low Temperature Setback must be ordered at same time the unit is
purchased; it cannot be added later without ordering a new circuit
board.
P/N 106 701A
41-23OOSP- Issued 1194
0 Nordson Corporation 1994
All Rights Resented
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