1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your CAPTIVE-AIRE Model DU12HFA Restaurant Canopy Hood Grease Rated Exhaust Fan. Please read this manual thoroughly before attempting to install or operate the unit. Retain this manual for future reference.
The CAPTIVE-AIRE DU12HFA is a high-speed, direct-drive centrifugal upblast exhaust fan designed specifically for restaurant grease and general ventilation applications. It features a robust aluminum housing, a backward-inclined wheel, and integrated speed control for optimal performance.
2. Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
- Always disconnect power before servicing the unit.
- Ensure all electrical connections comply with local codes and national electrical codes (NEC).
- Installation must be performed by qualified personnel.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
- Do not operate the fan if any parts are damaged or missing.
- This unit is designed for outdoor, upblast exhaust applications.
The unit is ETL Listed and complies with UL705 (electrical) Standards and CSA Std C22.2, No 113. Models 12 thru 85 are ETL Listed and comply with UL762 and ULC-S645 Standards for grease-rated applications.
3. Setup and Installation
The CAPTIVE-AIRE DU12HFA exhaust fan is designed for rooftop installation, typically on a roof curb (not included). A hinge kit is provided for exhaust fan roof curbs to allow for easy access for maintenance.
3.1 Unpacking and Inspection
Upon receipt, inspect the unit for any shipping damage. Report any damage to the carrier immediately. Verify all components are present according to the packing list.
Figure 1: CAPTIVE-AIRE DU12HFA Exhaust Fan. This image shows the complete exhaust fan unit, highlighting its robust aluminum construction and the integrated control box on the side.
3.2 Mounting the Fan
- Ensure the roof curb is properly installed and sealed to prevent leaks.
- Carefully lift the exhaust fan onto the roof curb. The fan base dimensions are 19" x 19".
- Secure the fan to the roof curb using appropriate fasteners.
- Install the provided hinge kit to allow the fan to pivot open for maintenance access.
Figure 2: CAPTIVE-AIRE DU12HFA Exhaust Fan installed on a rooftop. This image illustrates the fan mounted on a roof curb, connected to the electrical supply, and ready for operation.
3.3 Electrical Connections
The DU12HFA operates on 115 Volt Single Phase power. It includes a safety disconnect switch and a variable speed control.
- Ensure the power supply matches the fan's requirements (115V, single phase).
- Connect the fan to a dedicated circuit with appropriate overcurrent protection.
- Wire the disconnect switch and variable speed control according to the wiring diagram provided with the unit and local electrical codes.
- The main unit input is 2.4 Amps MCA, 15 Amps MOP, 115 V, 14 AWG Wire Min.
Figure 3: Close-up view of the electrical control box on the CAPTIVE-AIRE DU12HFA Exhaust Fan. This box houses the safety disconnect switch and provides access for electrical wiring.
Figure 4: Internal view of the CAPTIVE-AIRE DU12HFA Exhaust Fan, showing the motor, wiring, and the Varispeed control unit. This illustrates the direct-drive mechanism and speed adjustment components.
4. Operating Instructions
The DU12HFA fan is designed for continuous operation in commercial kitchen environments.
4.1 Initial Startup
- Before starting, ensure all installation steps are complete and verified by a qualified electrician.
- Turn the disconnect switch to the "ON" position.
- Adjust the variable speed control to the desired exhaust rate. The fan operates within a range of 100-500 CFM.
- Monitor the fan for any unusual noises or vibrations during initial operation.
4.2 Speed Control
The integrated variable speed control allows adjustment of the fan's CFM output. Rotate the knob on the control unit to increase or decrease the fan speed as needed for your ventilation requirements.
5. Maintenance
CAUTION: Always disconnect power to the unit before performing any maintenance or cleaning.
5.1 Routine Inspection
- Monthly: Inspect the fan wheel for grease buildup. Clean as necessary.
- Quarterly: Check motor bearings for wear and lubrication (if applicable, direct drive motors are often sealed). Inspect electrical connections for tightness and corrosion.
- Annually: Perform a thorough inspection of the entire unit, including housing, mounting, and wiring.
5.2 Cleaning
The DU12HFA is grease-rated and includes a restaurant duty grease cup and down spout. Regular cleaning is crucial for optimal performance and fire safety.
- Disconnect power to the fan.
- Open the fan housing using the quick-release latches and hinge kit.
- Remove and empty the grease cup. Clean it thoroughly.
- Clean the fan wheel and interior surfaces of the housing using a suitable degreaser. Ensure all grease is removed.
- Inspect the down spout for blockages and clear if necessary.
- Reassemble the fan, ensuring all latches are securely fastened.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan does not start | No power; Disconnect switch OFF; Motor overload; Faulty wiring | Check circuit breaker/fuse; Turn disconnect switch ON; Reset motor overload; Inspect wiring (qualified electrician only) |
| Reduced airflow | Grease buildup on wheel; Blocked ductwork; Incorrect speed setting | Clean fan wheel; Inspect and clear ductwork; Adjust speed control to higher setting |
| Excessive noise/vibration | Unbalanced fan wheel (grease buildup); Loose mounting; Worn motor bearings | Clean fan wheel thoroughly; Tighten mounting bolts; Contact technical support for motor inspection |
| Motor overheats | Insufficient airflow; Motor overload; Incorrect voltage | Check for blockages; Reset overload; Verify power supply voltage |
If troubleshooting steps do not resolve the issue, contact CAPTIVE-AIRE technical support.
7. Specifications - Model DU12HFA
Figure 5: Technical diagram of the CAPTIVE-AIRE DU12HFA Exhaust Fan, illustrating key dimensions and components such as the grease drain and ductwork connection.
| Feature | Detail |
|---|---|
| Model Name | DU12HFA |
| Brand | CAPTIVE-AIRE |
| Electric Fan Design | Exhaust Fan (Centrifugal Upblast) |
| Motor | 0.180 HP, 115 Volt, Single Phase, Direct Drive |
| Air Flow Capacity | 100-500 CFM (Cubic Feet Per Minute) |
| Fan Base Dimensions | 19" x 19" |
| Wheel Size | 10-1/2" |
| Item Weight | 62 Pounds |
| Power Source | Corded Electric |
| Voltage | 115 Volts |
| Wattage | 134 watts |
| Control Method | Variable Speed Control (Touch-type adjustment) |
| Housing Material | Heavy Gauge Aluminum |
| Certifications | UL705, UL762, ULC-S645, ETL Listed |
| Recommended Use | Restaurant Canopy Hood Grease Exhaust, General Ventilation |
| Special Features | Disconnect Switch, Variable Speed Control, Vibration Isolators, Quick Release Latches, Restaurant Duty Grease Cup, Down Spout, Hinge Kit |
8. Warranty
The CAPTIVE-AIRE DU12HFA exhaust fan comes with a one-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service. For specific warranty terms and conditions, please refer to the documentation included with your product or contact CAPTIVE-AIRE customer service.
This warranty does not cover damage resulting from improper installation, misuse, abuse, unauthorized repairs, or lack of proper maintenance.
9. Technical Support
Technical support is available upon purchase of your CAPTIVE-AIRE DU12HFA exhaust fan. If you encounter any issues during installation, operation, or maintenance that are not covered in this manual, please contact CAPTIVE-AIRE directly.
For assistance, please visit the official CAPTIVE-AIRE website or refer to the contact information provided with your product documentation.
CAPTIVE-AIRE Systems
www.captiveaire.com
