1. Introduction
This manual provides instructions for the installation, operation, and maintenance of your Broan-NuTone Model 688 Ceiling and Wall Ventilation Fan. This fan is designed to effectively remove humidity, tobacco smoke, and cooking odors, contributing to improved indoor air quality. Please read all instructions carefully before installation and use.
2. Safety Information
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.
- Before servicing or cleaning the unit, switch 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) in accordance with 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 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.
- When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
- Ducted fans must always be vented to the outdoors.
- This unit is suitable for use in a shower or tub when connected to a GFCI protected branch circuit.
- This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. (Proposition 65 Warning)
3. Package Contents
Your Broan-NuTone 688 Ventilation Fan package includes:
- Broan 688 Ceiling and Wall Mount Fan
- 50 CFM 4.0 Sones Motor Assembly
- White Plastic Grille
- Installation Hardware
4. Specifications
| Feature | Specification |
|---|---|
| Brand | Broan-NuTone |
| Model Number | 688 |
| Air Flow Capacity | 50 Cubic Feet Per Minute (CFM) |
| Noise Level | 4.0 Sones |
| Power Source | AC |
| Voltage | 120V |
| Duct Diameter | 3 inches |
| Mounting Type | Ceiling Mount, Wall Mount |
| Material | Galvanized steel, Polymeric (Grille) |
| Product Dimensions | 0.38"D x 9.25"W x 9"H |
| Item Weight | 3 Pounds |
5. Installation
The Broan-NuTone 688 fan is designed for straightforward installation in new construction or as a replacement unit. It can be installed between ceiling joists or wall studs. The torsion springs grille mounting requires no tools for a quick and easy installation. The motor snaps in and out for easy cleaning, and the removable wiring cover simplifies electrical connections.
Installation Steps:
- Prepare the Opening: Ensure the opening in the ceiling or wall is appropriately sized for the fan housing.
- Mount the Housing: Secure the fan housing to the ceiling joists or wall studs using screws or nails. The housing is made of corrosion-resistant galvanized steel.
- Connect Ductwork: Attach a 3-inch duct to the fan's exhaust port and route it to the outdoors. Ensure all connections are sealed to prevent air leakage.
- Electrical Connection: Connect the electrical wiring to the fan. The removable wiring cover allows for easier connections. Ensure power is OFF at the service panel before making any electrical connections.
- Install Motor Assembly: The plug-in, permanently lubricated motor with the polymeric blower wheel snaps into the housing.
- Attach Grille: Secure the white polymeric grille using the torsion springs. No tools are needed for this step. The grille is paintable to match your decor.
Visual Aids for Installation:
Helpful Installation Videos:
6. Operation
The Broan-NuTone 688 fan operates with a simple button control. Once installed and wired, activate the fan using the designated wall switch. The fan will immediately begin to exhaust air at 50 CFM, effectively removing moisture and odors from the room. To turn off the fan, simply toggle the switch to the off position.
7. Maintenance
Regular maintenance ensures optimal performance and longevity of your ventilation fan.
Cleaning the Grille:
- Turn off power at the service panel before cleaning.
- Remove the grille by gently squeezing the torsion springs and pulling down.
- Wash the grille in warm, soapy water. Rinse thoroughly and dry completely before reattaching.
Cleaning the Motor and Blower Wheel:
- Turn off power at the service panel.
- The motor assembly snaps out of the housing without the need for screws.
- Carefully wipe the motor and blower wheel with a damp cloth. Do not immerse the motor in water.
- Ensure all parts are dry before reassembling.
8. Troubleshooting
If your Broan-NuTone 688 fan is not operating as expected, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not turn on | No power to the unit; loose wiring; faulty switch. | Check circuit breaker/fuse. Ensure all wiring connections are secure. Test or replace the wall switch. |
| Reduced airflow | Clogged grille or blower wheel; obstructed ductwork. | Clean the grille and blower wheel as per maintenance instructions. Check ductwork for obstructions or kinks. |
| Excessive noise | Loose motor assembly; dirty blower wheel; fan blades hitting housing. | Ensure motor assembly is securely snapped in. Clean the blower wheel. Inspect for any obstructions or damage to fan blades. |
9. Warranty and Support
The Broan-NuTone 688 Ceiling and Wall Ventilation Fan comes with a one-year warranty on parts and labor. For warranty claims or technical support, please contact Broan-NuTone customer service. Keep your proof of purchase for warranty validation.
For further assistance, visit the official Broan-NuTone website or contact their customer support line.