The Nutone QT9093WH is a combination heat and ventilation unit designed for installation in ceilings. This article provides a comprehensive overview of the installation process, safety precautions, service parts, and warranty information based on available documentation. The unit is intended for use in residential settings and requires adherence to all applicable building codes and safety standards. Proper installation and maintenance are crucial for safe and efficient operation.
Installation Procedures
Installation of the Nutone QT9093WH requires careful attention to detail and adherence to safety guidelines. The documentation outlines procedures for both new construction and existing construction scenarios.
For new construction, the installation process involves securing hanger brackets between joists. The hanger bar is then inserted through the bracket opposite the blower vent. The housing is positioned between the joists, and the side hanger brackets and adjustable hanger bar ends are secured to the joists using screws or nails. It is essential to ensure the duct connector points upwards. The unit is not designed for wall mounting.
In existing construction, the hanger bar and mounting brackets are not utilized. A hole is cut in the ceiling, ensuring the area above is free of plumbing and electrical wiring. Sufficient clearance must be available above the ceiling for the heater housing, ductwork, and wiring. Short pieces of 1” x 3” lumber (¾” nominal) are secured to the joists on either side of the opening, leaving approximately ½” between the top of the ceiling and the lumber. The housing flange serves as a template for marking the cutout.
Regardless of the construction type, electrical wiring is a critical component of the installation. A 12-gauge wire is required for 115-120 volt circuits with a 20-amp capacity. The wiring should be connected using wire nuts, and the ground wire must be connected under the ground screw in the junction box. The wiring diagram (Figure 4 in the documentation) illustrates the connections for power, heat, and night light functions. A “T” marking on the diagram indicates the connection point for a thermostat or timer switch. Care must be taken to avoid pinching the wiring between the junction box cover and the housing.
Safety Precautions
Several safety precautions are outlined in the provided documentation. The unit must be used only in the manner intended by the manufacturer. Before any servicing or cleaning, the power must be switched off at the service panel and locked to prevent accidental reactivation. If the service disconnecting means cannot be locked, a warning tag should be securely fastened to the panel.
The heater becomes hot during operation, and caution is advised to avoid burns. Combustible materials, such as furniture, draperies, and bedding, should be kept at least 3 feet (0.9 m) away from the front, sides, and rear of the heater. Extreme caution is necessary when the heater is used near children or invalids, or when left operating unattended.
The documentation explicitly warns against storing or using gasoline or other flammable vapors and liquids in the vicinity of the heater. The unit must be grounded, and it should not be connected to a dimmer switch or speed control. Ducted fans must always be vented to the outdoors.
Service Parts Identification
The documentation includes a detailed list of service parts for the Nutone QT9093WH. This list provides a key number, part number, and description for each component. Key components include the hanger bar set, ceiling mounting bracket assembly, outlet box and ground screw assembly, receptacle, power unit assembly (ventilator and heater), motor, blower wheel, damper, thermal protector, heat element, light socket assembly, grille assembly, switch assembly, and various screws, grommets, and washers. This detailed parts list facilitates repair and maintenance by allowing for the precise identification and replacement of faulty components.
Cleaning and Maintenance
The documentation provides instructions for cleaning the unit. The grille can be removed by loosening the two screws holding it in place. The grille openings can be gently vacuumed with a soft brush, or wiped with a soft cloth. It is crucial to avoid immersing any metal or electrical parts in water. After cleaning, the power should be restored.
Warranty Information
Broan-NuTone provides a one-year warranty to the original purchaser of its products, covering defects in materials and workmanship. This warranty supersedes all prior warranties. To qualify for warranty service, the purchaser must notify Broan-NuTone, provide the model number and part identification, and describe the nature of the defect. Proof of original purchase date must be presented when requesting service. The warranty does not cover routine maintenance or products subjected to misuse, neglect, accident, improper service, or repair. It specifically excludes starter devices and fluorescent lamp tubes. The warranty details may vary by state.
Electrical Specifications and Wiring
The Nutone QT9093WH requires a 12-gauge wire for 115-120 volt circuits with a 20-amp capacity. The unit requires five conductors plus ground to operate all functions independently. The wiring diagram (Figure 4) details the connections for the power line, heat function, and night light function. Proper wiring is essential for safe and reliable operation. The documentation emphasizes the importance of using wire nuts for connections and securing the ground wire appropriately.
Conclusion
The Nutone QT9093WH Heat-A-Vent Lite is a combined heating and ventilation unit requiring careful installation and adherence to safety guidelines. The provided documentation outlines detailed installation procedures for both new and existing construction, a comprehensive list of service parts, and warranty information. Proper installation, regular cleaning, and adherence to safety precautions are essential for ensuring the safe and efficient operation of this unit. The documentation serves as a valuable resource for installers, homeowners, and service technicians.