F ILTER C LEANING C ONTROLS
The Clean Air AutoPulse Controller TM has been implemented on all Clean Air Industries Liberty Weldcell as a filter cleaning controller. The controller is connected to a differential pressure sensor
which measures the pressure drop across the filters. This pressure drop is displayed in the lower right
of the front display on the controller. The controller can be manipulated using the buttons below the
front display.
The Pulse time on the valve is set internally and cannot be changed. The valve will open and pulse
for 0.2 seconds. There are 4 different pulse modes available: AutoPulse, TimedPulse, CountPulse,
and ManualPulse.
Motor status is indicated at the top of the Display. This displays the contact status for activating and
holding in the motor contactor. When the controller is running, an indicator icon will be displayed. This
indicator resembles a pair of small rotating triangles. Additionally, input and output contacts can be
checked by holding down the ‘ESC’ key. The dis play will change to show the appropriate input and
output contacts. Once power to the system is turned on, the controller will start up in Automatic Mode.
Several Manual and Option modes are available as well which are shown below.
The controller will always restart into automatic mode when power is cycled regardless of the
mode before the power was shut off.
To change modes, hold the ‘B’ button while pressing the ‘+’ or ‘ - ’ Button.
Copyright © Clean Air Industries , Inc.
Liberty WeldCell User Manual, August 2023
Page 40 of 66
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