Accutrol AVC5000 - Page 27

Installation & Operation Manual - Model AVC5000
Contents of this Manual are Subject to Change Without Notification Page 27
6.6.4.2.1.4 Combination Sash (AI-2 and AI-3) Configuration
Follow the steps below to configure the controller for a Combination Sash style fume hood.
Note: Most VAV fume hoods are designed with some open area located above and below the sash to
provide a means for air to enter into the fume hood from the room when the sash is in the closed position.
The open area above the sash, which is usually referred to as a “restricted upper bypass”, allows air to
enter into the fume hood only when the sash is closed, or nearly closed. As the sash is raised, the upper
bypass becomes blocked. The open area below the sash which allows air to flow into the fume hood over
the work surface is sometimes referred to as the lower bypass or airfoil opening. The lower bypass area is
not affected by the sash position.
1. Select
2. Open Vert Sash to
100%, Measure Max
Vert Open Height &
Width and Enter
Measured Values in
the Boxes Provided
3. Close Vert Sash then
Position Horiz Panels
to Achieve Max
Horizontal Opening
and Enter Measured
Values in the Boxes
Provided.
4. Measure the Upper Bypass and Lower Bypass Opening Height and Enter Values in the Boxes Provided
then Save Changes