13Complete InstallationNOTE: The downdraft vent system is supplied with a 3¹⁄₄" x 10"(8.3 x 25.4 cm) back draft damper and a 6" (15.2 cm) round venttransition with damper. Refer to “3¹⁄₄" x 10" (8.3 x 25.4 cm) backdraft damper” or “6" (15.2 cm) round vent transition withdamper,” depending upon the type of venting you are using.3¹⁄₄" x 10" (8.3 x 25.4 cm) Back Draft Damper1. Attach the 3¼" x 10" (8.3 x 25.4 cm) back draft damper tothe vent opening in the blower motor box, using three3.5 x 9.5 mm screws.6" (15.2 cm) Round Vent Transition With Damper1. Attach the 6" (15.2 cm) round vent transition to vent opening(left or right side venting only is recommended), using two3.5 x 9.5 mm screws.2. Remove 4 screws attaching the terminal box cover.3. Determine which direction (front or rear) the home powersupply cable will enter the terminal box. Remove theappropriate knockout from the front or rear panel and install a¹⁄₂" (12.7 mm) UL listed or CSA approved conduit connector.4. Using 2 or more people, insert the downdraft vent into thecountertop cutout. Position downdraft vent so it is centeredin the cutout with the rear flange over the edge of the cutoutand the rear of the vent box against the edge of the cutout.5. Drill 2 pilot holes through each of the undercounter mountingbrackets into the underside of the countertop. Using 2 screws(not provided) of the appropriate length, mount the bracketsto the countertop.IMPORTANT: Select a screw length that will not allow thescrews to go through the countertop when tightened.6. Check that the downdraft vent is level vertically. Loosen thelower support legs screws and position the legs against thecabinet floor.A. 3.5 x 9.5 mm screwsB. 3¼" x 10" (8.3 x 25.4 cm) back draft damperA. 3.5 x 9.5 mm screwsB. 6" (15.2 cm) round vent transition with damperA. Terminal box coverAABABAA. Rear flange of downdraft ventB. Edge of cutout in countertopC. Rear of downdraft ventD. Cabinet backE. Lower support legF. Cabinet floorG. CountertopA. ScrewsB. BacksplashC. CountertopACBDEFGAB C