Once you have verified that the Liberty Weldcell is picking up the fumes or smoke, look at the
metal intake spark baffles at the back of the welding booth(s). These filters should be washed
when they become visibly dirty/contaminated.
If the unit begins auto pulsing at 7.0 in. H 2 O and the smoke is still being drawn in at an
acceptable level, the setting could be increased to a higher number. The correct number is
based on trial and error.
The process for determining your specific filter change interval is based on many variables.
Please feel free to establish a filter change interval that meets you application and desired
performance results. By properly monitoring the filters you will reduce filter costs and improve
the efficiency of the units.
Proper filter cartridge replacement is important to optimal performance of the Liberty
Weldcell.
What determines the maximum acceptable pressure
differential reading?
The answer is a reading slightly less than the point where the unit stops drawing in an
acceptable level of smoke plume.
If the unit still draws acceptably at 7.0 in. H 2 O, then the controller can be set to begin the auto
pulse cycle at a higher level. Please see the controller programming instructions for this
procedure.
If the unit stops draws acceptably at 5.0 in. H 2 O, then the controller can be set to begin the
auto pulse cycle at a lower level. Please see the controller programming instructions for this
procedure.
Copyright © Clean Air Industries , Inc.
Liberty WeldCell User Manual, August 2023
Page 56 of 66
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