KitchenAid KECD867XSS Installation Guide - Page 7

Calculating Vent System Length To calculate the length of the system you need, add the equivalent feet (meters) for each vent piece used in the system. Vent Piece 6" (15.2 cm) Round 45° elbow 2.5 ft (0.8 m) Example vent system 90˚ elbow 2 ft (0.6 m) 6 ft (1.8 m) wall cap 90° elbow 6" (15.2 cm) wall cap 5.0 ft (1.5 m) 0.0 ft (0.0 m) 3¹⁄₄" x 10" (8.3 cm x 25.4 cm) 4.5 ft to 6" (15.2 cm) transition (1.4 m) 6" (15.2 cm) to 3¹⁄₄" x 10" 1 ft (8.3 cm x 25.4 cm) transition (0.3 m) 3¹⁄₄" x 10" (8.3 cm x 25.4 cm) 9.0 ft to 6" (15.2 cm) 90° elbow (2.7 m) transition 6" (15.2 cm) to 3¹⁄₄" x 10" 5.0 ft (8.3 cm x 25.4 cm) 90° elbow (1.5 m) transition 3¹⁄₄" x 10" (8.3 cm x 25.4 cm) 5.0 ft 90° elbow (1.5 m) 3¹⁄₄" x 10" (8.3 cm x 25.4 cm) 12.0 ft flat elbow (3.7 m) 3¹⁄₄" x 10" (8.3 cm x 25.4 cm) 0.0 ft wall cap (0.0 m) 5" to 6" (12.7 cm to 15.2 cm) 1 ft transition (0.3 m) 1- 90° elbow 8 ft (2.4 m) straight 1 - wall cap System length = 5 ft (1.5 m) = 8 ft (2.4 m) = 0 ft (0 m) = 13 ft (3.9 m) NOTE: Flexible vent is not recommended. Flexible vent creates back pressure and air turbulence that greatly reduce performance. Determine Range Blower Setting This cooktop is equipped with a dual range blower. It is shipped from the factory in the low range for most installations. If the equivalent duct length exceeds 30 ft (9.1 m), it must be converted to high range. Do not convert the blower to high range for shorter lengths; this will cause excessive noise and conditioned air loss. Convert blower before installing into countertop if necessary. To Convert to High Range: WARNING Excessive Weight Hazard Use two or more people to move and install cooktop. Failure to do so can result in back or other injury. 1. Using 2 or more people, place cooktop on floor with front edge and plenum down. 2. Remove the four #10 - 32 locknuts (A) that attach the blower motor assembly to the blower exhaust scroll. 3. Remove the blower motor assembly (B) from the blower exhaust scroll (E). 4. Slowly reach in the blower exhaust scroll opening and remove the retainer (C). 5. Gently remove the restrictor ring (D). 6. Place the motor assembly back on the studs of the blower exhaust scroll. 7