Chapter 5: Using The Ductless Enclosure
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If a Check Airflow Activates
The most common causes of a check airflow alarm are:
• Blockage of the inlet perforated baffle or exhaust outlet.
• Loading or blockage of the filters resulting in low airflow.
• Motorized impeller failure or faulty electrical connector to the impeller.
Note: If the alarm sounds during use, immediately take appropriate action to
prevent contamination to you and other personnel in the area.
Resetting the Airflow Alert System
The Check Airflow Alarm automatically resets to normal operation and
displays the face velocity once the face velocity has increased and stabilized.
Working In the Paramount Ductless Enclosure
Planning
• Thoroughly understand procedures and equipment required before
beginning work.
• Arrange for minimal disruptions, such as room traffic or entry into the
room while the cabinet is in use.
Start-up
• Turn on blower and observe face velocity.
• Turn on the fluorescent light.
• Allow the enclosure to operate unobstructed for 1 minute.
• Wear a long sleeved lab coat with knit cuffs and over-the-cuff rubber
gloves. Use protective eyewear. Wear a protective mask if appropriate.
Loading Materials and Equipment
• Only load the materials required for the procedure. Do not overload
the enclosure.
• Do not obstruct the enclosure’s perforated baffle.
• Large objects should not be placed close together.
• Always operate with the sash in the closed position.
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