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FILTER REPLACEMENT
A. To remove the spent ACFHEPA filter:
1. Turn the unit on and make sure that the blower is running. The safety filter, located in the top of the
workstation, will protect you from any residual powders that might come off of the saturated primary
HEPA filter while replacing it.
2. Place 2 appropriate poly bags on the base of the workstation. You will place the saturated prefilter and
HEPA filter inside the bag and seal it before removing it from the hood.
3. Don the proper PPE for handling the substance that have been used inside the hood (refer to the
MSDS sheets). Remove the 4 black knobs holding the prefilter grid in place. This will expose the
saturated pre-filter.
DO NOT REMOVE THE PRE-FILTER FROM THE HOOD!
4. Remove the pre-filter from the pre-filter grid and place it inside the poly bag. Wipe any residue off of
the pre-filter grid and base of the workstation. Place the rag inside the bag with the pre-filter and seal
the bag.
5. With a small wrench, remove the ¼ - 20 hex nuts and remove the filter hold down.
6. Place the spent HEPA filter into the second poly bag. Wipe any residue off of the filter hold down
frame and any other obvious areas. Place the second rag into the bag and seal the bag. Dispose of
both bags in accordance with your local guidelines for the substances that have been used inside the
hood.
B. To install the new ACFHEPA filter:
1. Remove the ACFHEPA from the packaging. Visually inspect the HEPA filter for rips in the filter media.
2. Place the filter into the filter grid with the gasket and screen side facing away from you.
3. Place the filter hold down frame over the HEPA filter and secure it with the hex nuts.
4. Place the new pre-filter into the pre-filter grid and secure into place with the 4 black knobs.
5. Dispose of your PPE in accordance with your local guidelines for the substances that have been used
inside the hood.
Check the display screen to assure that the enclosure is functioning properly:
1. If the Low Airflow Alarm is not activated, proceed to use the enclosure.
2. If the Low Airflow Alarm is activated, contact our Technical Support Department at (800)849-0472.
Direct dial (919)255-3220. Monday - Friday 8:00AM - 5:00PM EST.
MAINTENANCE
