Labconco Purifie Horizontal Clean Benches 3970424 - Manual (Page 30)

Chapter 6: Maintaining Your Vertical Clean Bench
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Routine Maintenance Schedule
Weekly

Wipe down the interior surfaces of the enclosure with a disinfectant or
cleaner, depending upon the usage of the unit and allow to dry.

Using a damp cloth, clean the exterior surfaces of the enclosure,
particularly the front and top to remove any accumulated dust.

Operate the exhaust system, noting the airflow velocity out the front of the
enclosure using a source of visible smoke. Airflow monitors are
recommended for constant monitoring.
Monthly (or more often as required)

Determine the actual downflow velocity 6" below the upper diffuser of the
enclosure where the average reading should be at the specified velocity.
(Use calibrated thermal anemometer or other approved apparatus). Airflow
alarms are recommended for constant monitoring.

All weekly activities.

Check downflow velocity. Increase speed control or change HEPA filter
when downflow velocity of the enclosure drops below the recommended
speed for your facility or if the airflow alarm monitor alerts you. Airflow
monitors are recommended.
Annually

Replace UV lamps if equipped.

Verify proper operation of the UV closure panel switch.

Have the enclosure validated by a qualified certification technician. See
Certification and Recertification to follow in Chapter 6.

All monthly activities.

Change prefilter.
When to Replace HEPA Filters
The HEPA filter in the Purifier Vertical Clean Bench gradually accumulates airborne
particulate matter from the room. The rate of accumulation will depend upon the
cleanliness of the room air, and the amount of operational time the enclosure is
operating. In typical installations and usage, the HEPA filters will last two to five
years before requiring replacement. Replace HEPA filters when downflow velocity
drops below the recommended 30-65 fpm velocity and the speed control is adjusted
to full speed. Replace HEPA filter if it fails the HEPA Filter Leak Test in Chapter 6.
HEPA