Broan-NuTone 678 Ventilation Fan and Light Combo User Manual
- June 1, 2024
- Broan NuTone
Table of Contents
Broan-NuTone 678 Ventilation Fan and Light Combo
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE
FOLLOWING:
- Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer at the address or telephone the number listed in the warranty.
- Before servicing or cleaning the unit, switch the power off at the 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.
- Installation work and electrical wiring must be done by a qualified person(s) under all applicable codes and standards, including fire-rated construction codes and standards.
- Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel-burning equipment to prevent back-drafting.
- Follow the heating equipment manufacturer’s guidelines 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.
- When cutting or drilling into a wall or ceiling, do not damage electrical wiring and other hidden utilities.
- Ducted fans must always be vented to the outdoors.
- If this unit is to be installed over a tub or shower, it must be marked as appropriate for the application and be connected to a GFCI (Ground Fault Circuit Interrupter) – protected branch circuit.
- Never place a switch where it can be reached from a tub or shower.
- Fluorescent models only: Do not use a dimmer switch to control the light of this unit.
- This unit must be grounded.
CAUTION
- For general ventilating use only. Do not use it to exhaust hazardous or explosive materials and vapours.
- This product is designed for ceiling installation only. This product is designed for installation in ceilings up to a 12/12 pitch. Ductwork must point up. DO NOT MOUNT THIS PRODUCT IN A WALL.
- To avoid motor bearing damage and noisy and/ or unbalanced impellers, keep drywall spray, construction dust, etc. of the power unit.
- Please read the specification label on the product for further information and requirements. Installer: Leave this manual with the homeowner. Homeowner: Use and Care information on page 4.
TYPICAL INSTALLATIONS
HOUSING MOUNTED DIRECTLY TO JOIST
2×6 (or larger) Discharge parallel to joists.
HOUSING MOUNTED TO 2×4 TRUSS
Requires additional framing for mounting tabs.
Discharge parallel to joists.
HOUSING MOUNTED TO “I” JOIST
Requires additional framing for mounting tabs.
Discharge parallel to joists.
HOUSING MOUNTED TO ADDITIONAL FRAMING
Discharge 900 to joists.
HOUSING MOUNTED TO 2×4 TRUSS
Requires additional framing for mounting tabs.
Discharge 900 to joists.
HOUSING MOUNTED TO “I” JOIST
Requires additional framing for mounting tabs.
Discharge 900 to joists. Additional framing must be a 2×6 (minimum height).
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 2×6 (minimum height)
New Construction
- Choose the location for your fan in the ceiling. For the best possible performance, use the shortest possible duct run and a minimum number of elbows.
- Position mounting brackets against the joist so that the bottom edge of the housing will be flush with a finished ceiling.
- Additional positioning feature for 5/8”, 1”, & 1-1/4” thick ceiling material: Holes in the corners of the housing are labelled with various ceiling material thicknesses.
- Position housing so the bottom edge of the 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 the side of the housing, 900 outward. Lift the housing until the tabs contact the underside of the joist.
- Mark the keyhole slot on both mounting brackets.
- Set housing aside and drive nails partially into the joist at the top of both keyhole marks.
- 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
- Choose the location for your fan/light in the ceiling. For the best possible performance, use the shortest possible duct run and a minimum number of elbows.
- In the attic, position mounting brackets against the joist. Trace the outline of housing on ceiling material.
- Set housing aside and cut the ceiling opening slightly larger than marked.
- Place housing in the opening so that its bottom edge is flush with the finished ceiling. Nail to joist through the keyhole on both sides.
- To ensure a noise-free installation, drive another nail through the top hole of each mounting bracket.
- Additional mounting holes are provided for installations where access from above is inconvenient or not possible.
- Nail or screw housing directly to joists or framing.
INSTALL THE DUCTWORK
NOTE: The duct connector has a counter-balanced damper flap. The flap will be “open” approx. 1” when the duct connector is attached to the housing. This design permits insulation to be in direct contact with fan/light housing per UL (Underwriters Laboratories) standards. The slightest backdraft, however, will close the damper flap, preventing air from entering the unit or finished space.
-
Snap the damper/duct connector onto the housing. Make sure that tabs on the connector lock into slots in the housing. The top of the damper/duct connector should be flush with the top of the housing.
NOTE: Make sure the damper flap is in place inside the duct connector. If it is not: Squeeze the top and bottom of the connector to snap the flap back into place. -
Connect a 4” round duct to the damper/duct connector and extend the duct to the outside through a roof or wall cap. Check the damper to make sure that it opens freely. Tape all duct connections to make them secure and air-tight
CONNECT THE WIRING
- Wire unit the following diagram. Run the electrical cable as directly as possible to the unit.
- Do not allow the cable to touch the sides or top of the unit after installation is complete.
ATTACH THE GRILLE
-
Slide the light reflector into the front of the grille opening. Plug the light into the WHITE receptacle. Place the grille/reflector combination over protruding screw, and fasten it in place using the acorn nut provided.
-
HAND TIGHTEN acorn nut 1/4 turn after it is snug.
NOTE: If the grille and light reflector are not snug to the ceiling, use a nut driver or pliers on an acorn nut to snug the grille to the ceiling. -
Install a light bulb (not included). (See next page for the type and size of your model.) Insert one tab on the light lens into a slot in the grille/reflector combination.
-
Squeeze the other tab slightly and snap into the remaining slot
USE AND CARE
WARNING: DISCONNECT THE ELECTRICAL POWER SUPPLY AND LOCKOUT THE SERVICE
PANEL BEFORE CLEANING OR SERVICING THIS UNIT.
BULB REPLACEMENT
Remove the lens by gently depressing the sides and pulling down. Use a
100-watt maximum incandescent bulb.
MOTOR LUBRICATION
The motor is permanently lubricated. Do not oil or disassemble the motor.
CLEANING
TO CLEAN LENS AND GRILLE
Remove the light lens and bulb. Remove the nut in the centre of the reflector
and lower assembly.
CAUTION : The grille and reflector are separate units. Unplug the light
from the WHITE receptacle. Plastic parts can be cleaned with mild, soapy water
(use a mild detergent, such as dishwashing liquid) and dried with a soft
cloth. Do not
use abrasive cloth, steel wool pads, or scouring powders.
TO CLEAN FAN ASSEMBLY
Unplug the fan assembly (BLACK receptacle). To remove the motor plate: Find
the single tab on the motor plate (located next to the receptacles). Push up
near the motor plate tab while pushing out on the side of the housing. Or
insert a straight-blade screwdriver into the slot in the housing (next to the
tab) and twist the screwdriver. Gently vacuum the fan, motor and interior of
the housing. METAL AND ELECTRICAL PARTS SHOULD NEVER BE IMMERSED IN WATER.
WARRANTY
BROAN-NUTONE ONE YEAR LIMITED WARRANTY
Broan-NuTone warrants to the original consumer purchaser of its products that
such products will be free from defects in materials or workmanship for one
year from the date of the original purchase. THERE ARE NO OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. During this one year,
Broan-NuTone will, at its option, repair or replace, without charge, any
product or part that is found to be defective under normal use and service.
THIS WARRANTY DOES NOT EXTEND TO FLUORESCENT LAMP STARTERS AND TUBES. This warranty does not cover (a) normal maintenance and service or (b) any products or parts that have been subject to misuse, negligence, accident, improper maintenance or repair (other than by Broan-NuTone), faulty installation or installation contrary to recommended installation instructions. The duration of any implied warranty is limited to the one-year specified for the express warranty. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
BROAN-NUTONE’S OBLIGATION TO REPAIR OR REPLACE, AT BROAN-NUTONE’S OPTION, SHALL BE THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY. BROAN- NUTONE SHALL NOT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH PRODUCT USE OR PERFORMANCE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. This warranty supersedes all prior warranties. To qualify for warranty service, you must (a) notify Broan-NuTone at the address or telephone number below, (b) give the model number and part identification and (c) describe the nature of any defect in the product or part. At the time of requesting warranty service, you must present evidence of the original purchase date. Broan-NuTone LLC, 926 West State Street, Hartford, WI 53027 (1-800-637-1453)
SERVICE PARTS
Not shown assembled. Order replacement parts by “PART NO.” – not by “KEY NO.”