Decontamination, Determination of when to replace hepa filters – Labconco XPert Filtered Balance Stations 3962622 User Manual

Page 40

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Chapter 6: Maintaining Your Filtered Enclosure

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36

Decontamination

When used in conjunction with biohazards, the XPert Filtered Balance System and
XPert Filtered Balance Station should be decontaminated with formaldehyde gas before:

Maintenance work in contaminated areas

HEPA filter changes

Moving the cabinet to a new location

Changing research programs

After a gross spill of biohazardous material

The procedures for performing a gaseous decontamination are thoroughly outlined
in the U.S. Department of Health, Education and Welfare booklet entitled
Formaldehyde Decontamination of Laminar Flow Biological Safety Cabinets,
available from NIH, Division of Safety, Bethesda, MD 20892, call 301-496-2801,
or from Labconco Corporation.

Determination of When to Replace HEPA Filters

The HEPA filters in the filtered enclosures gradually accumulate airborne
particulate matter and powders from the enclosure and room. 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. In
typical installations and usage, the HEPA filters will last two to five years before
requiring replacement. Replace HEPA filters when face velocity drops below the
recommended 60-80 fpm velocity, and the speed control is adjusted to full speed.
Replace HEPA filters if it fails the HEPA Filter Leak Test in Chapter 6.

How to Install a New HEPA Filter with the Bag-In/

Bag-Out Procedure for XPert Filtered Balance

Systems and Stations

The XPert enclosures include a true bag-in/bag-out filter disposal system for safely
removing the HEPA filter and protect the worker from toxic powders and
particulates. See Figures 6-1 for the Bag-In/Bag-Out Procedure. For your safety,
wear appropriate personal protective equipment during the change of HEPA filters.
If working with biohazardous materials, use the decontamination procedure outlined
in Chapter 6. (Consult your Safety Officer before performing filter changes).

Do NOT contact blower wheel while still in motion.

NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.

1. With the enclosure OFF, remove the front panel secured by two screws on

top of the enclosure.

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