Installation and Operating Guide
High- Ductless Exhaust Fume Hood
©
Copyright 2016
Terra Universal Inc. All rights reserved • Revised December 2016 • Document No. 1800-72
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
4
3.0
Maintenance
Use a clean, damp cloth and mild detergent to clean hood surfaces.
Activated carbon filters will not show any signs of saturation, so they must be tested frequently with a chemical-
specific detector tube or other gas detection system. It is advisable to conduct time studies using a Threshold Limit
Value (TLV) to better estimate the usable life of the filter in your application.
HEPA (or ULPA) final filters should be replaced about every two years, depending on use. As these filters clog, you
will notice a reduction in air speed and noisier blower operation.
To replace filters from inside the work area:
The filter(s) are held securely in place by two plated-steel pawls along
the front edge of the filter housing. Rotate each black knob 90° to
release the filter(s) and then carefully lower them out of the housing.
Insert the replacement filter(s) and rotate the pawls back into position.
To replace filters from outside the work area:
Disengage the polypropylene latches that hold the blower housing to the filter housing. The routed grips on either side
of the blower housing allow it to be lifted off of the filter housing. Once it is removed, simply lift the filter(s) out of their
housing and replace with new ones; then, reattach the blower housing.
Pawl and Latch Assembly
Shown: Three of the six latches that hold the blower housing (top) to the filter housing (bottom)
