Speed Control
The air flow can be regulated from 300 to 900 cfm by using the HIGH/VARIABLE speed selector switch and the SPEED
CONTROL knob.
Start the Machine
To start the machine in high speed, set the rocker switch HIGH/VARIABLE speed to the HIGH position. In this position
the SPEED CONTROL is disabled.
To start the machine in VARIABLE SPEED, set the rocker switch to the VARIABLE SPEED position and rotate the SPEED
CONTROL knob clockwise to obtain the desired airflow. As the filters fill with dust, the efficiency of the filters are
maintained, but the airflow will decrease and the vacuum reading will increase. Change the primary/secondary filter
frequently to protect the HEPA and to get more air flow and prolong the life of your HEPA. When the vacuum gauge
reached about 2.0” CC, with a clean per-filter in place, the HEPA filter will have to be replaced. Accessories such as
an optional intake manifold can be used on the suction side of the unit providing 12” connection for the flex duct. The
discharge side of the unit has a 12” diameter ring for a flex duct.
Maintenance
The blower and motor do not require any maintenance when the machine is operated with the HEPA filter in place.
Pr-Filter 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). 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.
Troubleshooting
Your Omnitec Design machine is designed and engineered to provide years of trouble free service. Occasionally
problems occur. Here are some helpful tips and solutions
The machine does not start
1. Check that the unit is plugged in and there is 115VAC available. Select either LOW or HIGH speed to turn the machine
on. If the red indicator light comes on, power is coming to the unit from the outlet.
2. Call Omnitec technical support to troubleshoot further.
filter tab
