Insignia NS-OTR17SS3 Installation Guide - Page 7

1.7 Cu. Ft. Over-the-Range Microwave Exhaust requirements Use this section if you plan to vent your microwave outside (top or back exhaust). If you plan to recirculate the air back into the room, skip to Unpacking your microwave on page 9. When installing exhaust vents: • Use the most direct route with as few elbows/transitions as possible. This helps prevent blockages and ensures that the exhaust is being vented correctly. Also make sure that dampers swing freely and that nothing is blocking the ducts. • Your microwave is designed to mate with a standard 3 1/4" × 10" (8.2 x 25.4 cm) rectangular duct or 5 in. (12.7 cm) diameter/6 in. (15.2 cm) diameter round duct. If a round duct is required, a rectangular-to-round transition adapter must be used. Note: If a rectangular-to-round transition adapter is used, you must cut the bottom corners of the damper with tin snips to let the damper have free movement. • Elbows, transitions, and wall/roof caps add resistance to airflow. Each of these pieces are equivalent to a section of straight duct that is longer than their actual physical size. When calculating your duct length, add the equivalent lengths of all the pieces together. For proper airflow, the equivalent airflow should not exceed 140 ft. (42.7 m). For example: Outside top exhaust (example) Duct Pieces Equivalent × Number = Total Length Used Equivalent Length Roof cap 1 E24 Rectangular-to1L Round Transition 5 Adapter M P 12 ft. (3.6 m) Straight Duct (6 in. (15.2 cm) E X A 1 1421 round 24 ft. (7.3 m) ×( )= ft. (7.3 m) 5 ft. (1.5 m) ×( )= ft. (1.5 m) 12 ft. (3.6 m) ×( )= ft. (3.6 m) Total ductwork = ft. (12.5 m) Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood. For proper airflow, this number should not exceed 140 ft. Important: If a rectangular-to-round transition adapter is used, the bottom corners of the damper will have to be cut to fit, using the tin snips, in order to allow free movement of the damper. Outside back exhaust (example) Duct Pieces Equivalent × Number = Total Length Used Equivalent Length Wall cap P21L E4200 90°elbow 40 ft. (12.2 m) × ( )= ft. (12.2 m) 10 ft. (3 m) ×( )= ft. (6 m) M Straight duct 6" round OR X A 1 3 3-1/4"× 10"rectangular 3 ft. (.9 m) ×( )= ft. (.9 m) E 63 Total ductwork = ft. (19.2 m) Equivalent lengths of duct pieces are based on actual tests and reflect requirements for For proper airflow, good venting performance with any vent hood. this number should not exceed 140 ft. Note: For back exhausting, care should be taken to align exhaust with space between studs, or the wall should be prepared at the time it is constructed by leaving enough space between the wall studs to accommodate exhaust. Use the Equivalent duct length table on page 8 to calculate the equivalent ductwork length for your setup. www.insigniaproducts.com 7