- Purifier HEPA Filtered Enclosures & Purifier Class I Filtered Enclosures User's Manual

Chapter 4: High Performance Features and Safet

19. The HEPA filter in the enclosure will gradually accumulate

airborne particulate matter from the room and from work

performed in the enclosure. The rate of accumulation will

depend upon the cleanliness of the room air, the amount of

time the enclosure is operating and the nature of work

being done in the enclosure. With normal usage, the HEPA

filters will last two to five years before requiring

replacement.

20. Avoid direct exposure to ultraviolet (UV) radiation;

NEVER work in the Purifier Class I Enclosure when the

UV light is on.

21. Ensure that the filtered enclosure is connected to an

electrical service in accordance with local and national

electrical codes. Failure to do so may create a fire or

electrical hazard. Do not remove or service any electrical

components without first disconnecting the filtered

enclosure from electrical service.

22. Use of an open flame must be avoided with the enclosure.

Open flames may disrupt the airflow patterns in the

enclosure and cause a fire hazard with volatile solvents.

23. Increase the face velocity by adjusting the speed control of

the motorized impeller or change the HEPA filter when the

face velocity falls below acceptable limits established by

your Safety Officer.

24. Exhaust carbon filters and HEPA filters are disposed as

hazardous waste. The user is responsible for recording the

chemicals adsorbed or treated by the filters and disposing

properly. HEPA filters should be decontaminated before

disposal on Purifier enclosures.

25. Ensure only trained operators use the enclosure. New users

should review the User’s Manual and become familiar with

the operation of the enclosure.

26. If the filtered enclosure is to be used in a confined space,

make sure the space is well ventilated and the concentration

of toxic contaminants cannot accumulate greater than the

TWA.

27. Proper operation of the enclosure depends largely upon the

enclosure location and the operator’s work habits. The

enclosure should be located away from traffic patterns,

doors, fans, ventilation registers, fume hoods, and any other

air-handling device that could disrupt its airflow patterns.

Consult Chapter 2: Prerequisites and Chapter 3: Getting

Started sections of this manual for further details.