14
FILTER REPLACEMENT
A. To remove the spent ACFHEPA fi lter:
1. Turn the unit on and make sure that the blower is running. The safety fi lter, located in the top of the
workstation, will protect you from any residual powders that might come off of the saturated primary
HEPA fi lter while replacing it.
2. Place 2 appropriate poly bags on the base of the workstation. You will place the saturated prefi lter and
HEPA fi lter 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 prefi lter grid in place. This will expose the
saturated pre-fi lter.
DO NOT REMOVE THE PRE-FILTER FROM THE HOOD!
4. Remove the pre-fi lter from the pre-fi lter grid and place it inside the poly bag. Wipe any residue off of
the pre-fi lter grid and base of the workstation. Place the rag inside the bag with the pre-fi lter and seal
the bag.
5. With a small wrench, remove the ¼ - 20 hex nuts and remove the fi lter hold down.
6. Place the spent HEPA fi lter into the second poly bag. Wipe any residue off of the fi lter 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 fi lter:
1. Remove the ACFHEPA from the packaging. Visually inspect the HEPA fi lter for rips in the fi lter media.
2. Place the fi lter into the fi lter grid with the gasket and screen side facing away from you.
3. Place the fi lter hold down frame over the HEPA fi lter and secure it with the hex nuts.
4. Place the new pre-fi lter into the pre-fi lter 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 Airfl ow Alarm is not activated, proceed to use the enclosure.
2. If the Low Airfl ow 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
