Initially, a Green LED will illuminate (at bottom of graph). As the airflow rate decreases (as the filter(s) start
to become clogged), LED’s will illuminate high on the graphical display.
Illumination colors will darken to shades of Yellow and finally to Red as the illumination reaches the top
of the graphical curve.
When the first Red LED illuminates, it is indicating insufficient airflow. Replacement of the filter(s) at this
point is highly recommended. Refer to “Filter Replacement”, page 12.
If the last Red LED (at the upper right of the display) illuminates, an alarm will sound. Immediately, turn
the system power off (Power Switch) and change filters.
Caution
Overheating may occur and cause motor damage if the system is operated with completely
clogged filters.
Motor Compensation Feature
The Arm-Evac 250 features intelligent pump flow sensors that increase the power to the motor as filters
become blocked to assure peak performance.
Maintenance
General Tips:
•
Before opening the Arm-Evac 250, always turn off the power source.
•
Protect the Arm-Evac and accessories from dampness.
•
Do not extract water vapor or steam.
•
The Arm-Evac 250 must not be operated without filters. Impurities in the extracted air can
damage the motor pump.
•
Do not allow the Arm-Evac 250 or ducting hoses to become blocked.
•
Do not extract corrosive compounds without checking with PACE.
•
Re-calibrate the Arm-Evac 250 whenever a filter change out or system configuration change
occurs.
Filter Replacement
Pre-Filter
This filter removes coarse particles from the air. In general, the pre-filter must be changed on a
monthly basis. However, depending on your particular process, the filter may need to be
changed more or less frequently. A visual inspection on a weekly basis is recommended.
Main Filters
Fume Extraction Filters remove particulates from the air and capture noxious odors and gases.
Depending on your particular process, the filter cartridge may need to be changed more or less
frequently.
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