If you have questions, contact the manufacturer at the address or telephone number listed in the warranty. 2. Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting means to prevent power from being switched on accidentally. When the service disconnecting means cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel. 3. Installation work and electrical wiring must be done by a qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards. 4. Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equipment to prevent backdrafting. Follow the heating equipment manufacturer’s guideline and safety standards such as those published by the National Fire Protection Association (NFPA), and the American Society for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities. 5. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities. 6. Ducted fans must always be vented to the outdoors. 7. NEVER place a switch where it can be reached from a tub or shower. 8. This unit must be grounded. 9. This unit is U.L. listed. Type I.C. inherently protected. CAUTION i. 2. 3. For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors. This product is designed for installation in FLAT CEILINGS ONLY. Do not mount this product in a wall. The light fixture assembly must be mounted to the fan housing assembly included with this product. Do not mount the light fixture assembly to a wiring outlet box. 4. To avoid motor bearing damage and noisy and/or unbalanced impellers, keep drywall spray, construction dust, etc. off power unit. 5. Please read specification label on product for further information and requirements. Installer: Leave this manual with the homeowner. Homeowner: Use and Care information on page 4. TYPICAL INSTALLATIONS POWER CABLE POWER CABLE TJ. / MOUNTING TABS \ 2 x 4 CEILING JOIST or TRUSS ADDITIONAL FRAMING * HOUSING 2 x 4 CEILING JOIST or TRUSS HOUSING MOUNTED DIRECTLY TO JOIST 2x6 (or larger) Discharge parallel to joists. CEILING MATERIAL GRILLE PAN - GLASS LIGHT SHADE HOUSING MOUNTED TO 2x4TRUSS Requires additional framing for mounting tabs. Discharge parallel to joists. POWER CABLE TW MOUNTING ADDITIONAL FRAMING * „I" JOIST CEILING MATERIAL GLASS LIGHT SHADE LIGHT SHADE HOUSING MOUNTED TO “I” JOIST Requires additional framing for mounting tabs. Discharge parallel to joists. * Additional framing must be a 2x6 (minimum height), at least 9-inches long. SUSPENDED CEILINGS Housing hung with wires 3-point mount. PLAN THE INSTALLATION The unit will operate most quietly and efficiently when located where the shortest possible duct run and minimum number of elbows will be needed. Use a roof cap or wall cap that has a built-in damper to reduce backdrafts. Plan to supply the unit with proper line voltage and appropriate power cable. INSULATION (Can be placed around and over fan housing FAN HOUSING , IM 4-IN. ROUND DUCT * * Purchase 4-IN. ROUND separately ELBOW(S) WALL CAP * NuTone MODEL 768CHNT Page 2 INSTALL THE HOUSING - PLEASE NOTE -THE FOLLOWING INSTALLATION ILLUSTRATIONS SHOW 2 X 6 JOISTS. IF YOU HAVE A TRUSS OR “I”-JOIST INSTALLATION, MOUNT THE VENTILATOR TO THE ADDITIONAL FRAMING IN THE SAME MANNER. (Additional framing must be a 2x6 (minimum height), at least 9-inches long.) New Construction 1. Choose the location for your fan in the ceiling. For best possible performance, use the shortest possible duct run and a minimum number of elbows. 2. Position mounting brackets against joist so that bottom edge of housing will be flush with finished ceiling. Additional positioning feature for 5/8” 1” & 1-1/4” thick ceiling material: Holes in corners of housing are labeled with various ceiling material thicknesses. Position housing so bottom edge of joist is visible through a matched set of holes. The housing is now in the proper position for that ceiling material thickness. Additional positioning feature for 1/2” thick ceiling material: Bend two tabs, on side of housing, 900 outward. Lift housing until tabs contact underside of joist. Mark the keyhole slot on both mounting brackets. INSTALL THE HOUSING (continued)_ New Construction 3. Set housing aside and drive nails partially into joist at the top of both keyhole marks. 4. Hang housing from nails and pound nails tight. To ensure a noise-free mount, pound another nail through the top hole of each mounting tab. Existing Construction 1. Choose the location for your fan/light in the ceiling. For best possible performance, use the shortest possible duct run and a minimum number of elbows. 2. In attic, position mounting brackets against joist. Trace outline of housing...