1. Product Overview
The NuTone 87546000 B-unit Motor Assembly is a genuine replacement part designed for specific NuTone/Broan ventilation fan models. This assembly is crucial for the proper operation of your ventilation system, ensuring efficient air movement.
Key features of this assembly include:
- Genuine NuTone motor assembly.
- Includes the motor, blower wheel, and bracket.
- Compatible with NuTone/Broan ventilation fan models: 769RFT, 769RF, and V769RF.
- OEM replacement part, ensuring proper fit and function.
Figure 1: NuTone 87546000 B-unit Motor Assembly. This image displays the complete assembly, featuring the motor, the white blower wheel, and the metal mounting bracket. The red wires connecting to a black connector are also visible.
2. Safety Information
Before attempting any installation or maintenance, please read and understand all safety instructions. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Disconnect Power: Always turn off power at the circuit breaker or fuse box before installing, servicing, or cleaning the unit. Ensure the power is locked out to prevent accidental re-energization.
- Qualified Personnel: Installation and wiring must be performed by qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards.
- Proper Grounding: Ensure the unit is properly grounded.
- Ventilation: Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer.
- Inspect for Damage: Before installation, inspect the motor assembly for any signs of damage during shipping. Do not install if damaged.
3. Package Contents
Upon opening the package, verify that all components are present and undamaged:
- 1 x NuTone 87546000 B-unit Motor Assembly (includes motor, blower wheel, and bracket)
If any parts are missing or damaged, do not proceed with installation. Contact NuTone customer support immediately.
4. Setup and Installation
This motor assembly is designed as a direct replacement for specific NuTone/Broan ventilation fan models. Refer to your original fan's instruction manual for detailed disassembly and reassembly steps. The following are general guidelines:
- Preparation: Ensure the power to the ventilation fan circuit is completely disconnected at the main electrical panel. Verify with a voltage tester.
- Access the Fan Housing: Remove the fan grille and any light covers to access the motor assembly within the fan housing.
- Disconnect Old Assembly: Carefully disconnect the electrical wires from the old motor assembly. Note the wiring configuration if necessary. Unfasten any screws or clips holding the old assembly in place.
- Remove Old Assembly: Gently remove the old motor, blower wheel, and bracket assembly from the fan housing.
- Install New Assembly: Position the new NuTone 87546000 B-unit Motor Assembly into the fan housing. Ensure it seats correctly and align any mounting holes. Secure it with the appropriate screws or fasteners.
- Connect Wiring: Reconnect the electrical wires to the new motor assembly. Ensure connections are secure and follow the original wiring configuration.
- Test: Before reattaching the grille, restore power to the circuit and briefly test the fan to ensure it operates correctly and quietly.
- Final Assembly: Once confirmed operational, disconnect power again, then reattach the fan grille and any light covers. Restore power.
For optimal performance and safety, it is highly recommended to consult a qualified electrician or HVAC professional for installation if you are not comfortable performing electrical work.
5. Operating Instructions
The NuTone 87546000 B-unit Motor Assembly functions as the core component of your ventilation fan. Once properly installed, its operation is integrated with the fan's existing controls (e.g., wall switch, timer). When the fan is activated, the motor will power the blower wheel, drawing air through the fan housing and expelling it through the ductwork.
No direct user interaction with the motor assembly itself is required during normal operation.
6. Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your ventilation fan and its motor assembly. Always disconnect power before performing any maintenance.
- Blower Wheel Cleaning: Periodically (e.g., every 6-12 months), remove the fan grille and gently clean the blower wheel and motor housing. Dust and debris can accumulate on the blower wheel, reducing airflow and increasing motor strain. Use a soft brush or a vacuum cleaner with a brush attachment.
- Motor Lubrication: This motor assembly is typically designed with sealed bearings that do not require lubrication. Do not attempt to lubricate the motor unless specifically instructed by NuTone.
- Inspect Wiring: During cleaning, visually inspect the wiring connections for any signs of wear, fraying, or loose connections.
7. Troubleshooting
If your ventilation fan is not operating as expected after installing the new motor assembly, consider the following common issues:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not turn on. | No power to the fan; loose wiring connection; faulty wall switch or timer. | Check circuit breaker/fuse. Ensure all wiring connections are secure. Test the wall switch or timer. |
| Fan runs, but airflow is weak. | Clogged blower wheel; obstructed ductwork; incorrect fan model. | Clean the blower wheel and fan housing. Check ductwork for obstructions. Verify the motor assembly is compatible with your fan model. |
| Fan is unusually noisy. | Blower wheel imbalance or debris; loose mounting screws; motor issue. | Clean the blower wheel. Ensure the motor assembly is securely mounted. If noise persists, the motor may be faulty (unlikely for a new part). |
| Motor overheats. | Insufficient ventilation; excessive load; faulty motor. | Ensure fan housing is clear of obstructions. Verify correct voltage supply. If issues persist, contact a qualified technician. |
If troubleshooting steps do not resolve the issue, contact NuTone customer support or a qualified professional.
8. Specifications
| Attribute | Detail |
|---|---|
| Brand | NuTone |
| Model Name | 87546000 |
| Product Dimensions | 9"W x 9"H |
| Material | Copper |
| Item Weight | 2.7 Pounds |
| Manufacturer | Q2U LLC, formerly Davelle |
| UPC | 785577169908, 696727523795, 043941396337, 735090875091 |
| Part Number | 87546000 |
| Compatible Fan Models | 769RFT, 769RF, V769RF |
| First Available Date | November 4, 2012 |
9. Warranty Information
NuTone products are manufactured to the highest quality standards. This motor assembly is covered by NuTone's standard limited warranty. For specific warranty terms and conditions, including duration and coverage details, please refer to the warranty documentation included with your original ventilation fan or visit the official NuTone website.
Keep your proof of purchase for warranty claims.
10. Customer Support
For technical assistance, replacement parts, or warranty inquiries, please contact NuTone customer support:
- Website: Visit the official NuTone website for FAQs, product registration, and contact information.
- Phone: Refer to the NuTone website or your original product packaging for customer service phone numbers.
- When contacting support, please have your product model number (87546000) and purchase date available.
