Revision Date: 09222022 06
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Maintenance
Preventative Maintenance
The motor and blower do not require maintenance and your OmniAire machine will run for years with
proper regular replacement of the filters. In addition, the unit’s power cord should be inspected for cuts
or other damage on a regular basis.
Prefilter Replacement
The primary/secondary filter should be changed when the orange side shows it is loaded with dust.
Changing the filter can be done while the machine is running. Ensure that the orange side of the
prefilter is facing the HEPA filter.
HEPA Filter Replacement
During your projects, your HEPA filter purifies the air and gradually becomes loaded with sub-micron
particulates. Even when the HEPA filter is fully loaded, the filter is still removing particulates from the
air at the rated efficiency yet at a reduced airflow. This will affect the ability of the machine to provide
positive or negative pressure within the containment.
To replace the HEPA filter unplug the machine and remove the screen/manifold to remove the prefilter.
You will see 4 filter tabs holding the HEPA filter in place (see photo above). These tabs are secured with
1/4-20 Nylock nuts, which require a 7/16” wrench or socket.
Remove all 4 filter tab retaining nuts and remove the filter tabs and set aside. Slide the HEPA filter out
along the filter guides and remove it from the machine. ALWAYS TREAT THE USED HEPA FILTER AS
HAZMAT AND PROCESS IT ACCORDING TO YOUR ESTABLISHED HAZMAT PROCEDURES.
To replace the HEPA filter ensure that the gasket on the HEPA filter faces inwards toward the flange,
slide the filter in place along the filter guides and re-install the filter tabs and filter tab securing nuts.
The nuts should initially be tightened to where the stud is flush with the end of the nut. This will
compress the gasket on the filter approximately 1/2 of the thickness. This allows for the filter to be
reseated and tightened at a later time if necessary.
