Operation 19
4510003 Rev B
The VFD-M fan control modules control each large fan motor speed. The smaller fans
on the top outer edges of the tunnel begin running automatically when the Tunnel power
Switch is turned to the ON position.
The tunnel is shipped with the fan controls set at F60.0, which equals 60 Hz or full
power of the fans.
Control Function
Program/Function key Used to change parameters and display
amperage, hertz, frequency, and counter.
LED Display key Displays settings.
LED Indicators Lamps light up for each operation.
RUN key Not used
STOP/RESET key Not used
ENTER key Saves settings and changes to settings.
UP and DOWN keys Used to raise fan speed (no higher than 60) and
to lower fan speed to slow down airflow through
the inside vents of the tunnel.
Potentiometer
Refer to the VFD-M Digital Keypad Manual for
more information.
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