CAPTIVE-AIRE DU50HFA Centrifugal Upblast Exhaust Fan User Manual

1. Safety Information

Read all instructions carefully before installing, operating, or performing maintenance on the CAPTIVE-AIRE DU50HFA Centrifugal Upblast Exhaust Fan. Failure to follow these instructions may result in property damage, serious injury, or death.

• Electrical Safety: Ensure all electrical connections are made by a qualified electrician in accordance with local and national electrical codes. Disconnect power before servicing.
• Professional Installation: This unit requires professional installation due to its size, weight, and electrical requirements.
• Grease-Rated Application: This fan is specifically designed for restaurant grease and general ventilation applications. Ensure proper ductwork and hood systems are in place.
• Secure Mounting: The fan must be securely mounted to prevent movement or dislodgement during operation.
• Personal Protective Equipment (PPE): Always wear appropriate PPE, including gloves and eye protection, during installation, maintenance, and inspection.
• UL/ETL Compliance: The DU50HFA is UL705, UL762, & ULC-S645 Rated, ensuring compliance with safety standards.

2. Product Overview

The CAPTIVE-AIRE DU50HFA is a high-speed, direct-drive centrifugal upblast exhaust fan designed for efficient ventilation in demanding environments such as commercial kitchens. It features robust construction and integrated controls for reliable performance.

Key Features:

• High Speed Direct Drive Centrifugal Upblast Exhaust Fan with speed control and disconnect switch.
• Equipped with a 13-3/4" wheel.
• Fan Base Dimensions: 21" x 21".
• Weight: 88 LBs.
• Airflow Capacity: 900-1500 CFM.
• Motor: 0.50 HP, 115 Volt, Single Phase.
• Rated for restaurant grease and general ventilation applications.
• UL705, UL762, & ULC-S645 Rated.
• Includes a restaurant duty grease cup, down spout, and a hinge kit for exhaust fan roof curbs.
• Construction: Heavy gauge aluminum housing, backward inclined, non-overloading wheel, safety disconnect switch, variable speed control, vibration isolators, and quick release latches for motor compartment access.
• Manufactured in the USA.

Components:

This image shows the complete exhaust fan unit installed on a commercial rooftop, highlighting its robust aluminum housing and upblast design.

A detailed view of the external electrical disconnect switch, which provides a safety cutoff for the fan, and the conduit for electrical wiring.

This image displays the internal components, including the direct-drive motor and the variable speed control unit, accessible for maintenance.

A technical diagram illustrating the fan's base dimensions and the location of the grease drain, crucial for installation planning.

3. Specifications

4. Installation

Installation of the CAPTIVE-AIRE DU50HFA exhaust fan should be performed by qualified personnel only, adhering to all local and national building and electrical codes. The unit is designed for rooftop mounting above a compatible kitchen canopy hood.

General Steps:

1. Prepare Mounting Surface: Ensure the rooftop curb or mounting surface is level, structurally sound, and properly sealed to prevent water intrusion.
2. Position the Fan: Carefully lift and position the DU50HFA fan onto the prepared curb. The unit's 21" x 21" base should align with the opening.
3. Secure the Fan: Use appropriate fasteners to secure the fan base to the mounting curb. The included hinge kit should be utilized for easy access during maintenance.
4. Connect Ductwork: Ensure a tight and sealed connection between the fan's exhaust opening and the hood ductwork.
5. Electrical Connection: Proceed to the wiring section for detailed electrical connection instructions.
6. Install Grease Cup: Attach the restaurant duty grease cup and down spout to collect grease runoff.

For detailed dimensions and specific installation requirements, refer to the technical diagram provided in Figure 2.4 and consult the full installation guide.

5. Wiring

All electrical wiring must be performed by a licensed electrician. Ensure power is disconnected at the main breaker before attempting any wiring procedures. The DU50HFA operates on 115 Volt single-phase power.

Wiring for Direct Drive Connection:

To configure the motor for direct drive operation, it may be necessary to adjust the internal wiring connections. Typically, this involves swapping specific colored wires within the motor's terminal box.

• Locate the motor's wiring compartment.
• Identify the red and black lines.
• Carefully swap the connections of the red line and the black line.
• Ensure all connections are secure and insulated.
• Refer to the motor's specific wiring diagram, usually located inside the terminal box cover, for precise instructions.

6. Operation

The CAPTIVE-AIRE DU50HFA exhaust fan is designed for straightforward operation with its integrated speed control and disconnect switch.

Starting the Fan:

1. Ensure all installation and wiring procedures are complete and verified.
2. Turn on the main power supply to the fan at the electrical panel.
3. Engage the external disconnect switch to the "ON" position (refer to Figure 2.2).
4. Adjust the variable speed control (refer to Figure 2.3) to the desired airflow setting. The fan offers multiple power levels for precise control over ventilation.

Stopping the Fan:

1. Turn the variable speed control to the "OFF" position.
2. Disengage the external disconnect switch to the "OFF" position.
3. For extended periods of non-use or maintenance, turn off the main power supply at the electrical panel.

7. Maintenance

Regular maintenance is crucial for the longevity and efficient operation of your CAPTIVE-AIRE DU50HFA exhaust fan. Always disconnect power before performing any maintenance.

Routine Maintenance:

• Grease Cup Cleaning: Regularly inspect and empty the restaurant duty grease cup. Frequency depends on usage and cooking volume.
• Fan Wheel Inspection: Periodically inspect the fan wheel for grease buildup or debris. Excessive buildup can reduce efficiency and cause imbalance. Access the fan wheel by removing the top cover and the internal motor assembly. This typically involves releasing three clips on the top cover, then removing four 1/2-inch nuts securing the motor assembly, and finally a clip to slide back the outer casing.
• Motor and Wiring Check: Inspect the motor for any signs of wear, unusual noises, or overheating. Check electrical connections for tightness and corrosion.
• Housing Inspection: Examine the aluminum housing for any damage, corrosion, or loose fasteners.
• Vibration Isolators: Ensure vibration isolators are intact and functioning correctly to minimize noise and wear.

For detailed disassembly and cleaning procedures, consult the comprehensive service manual or contact technical support.

8. Troubleshooting

This section provides basic troubleshooting steps for common issues. For more complex problems, contact CAPTIVE-AIRE technical support.

9. Warranty and Support

The CAPTIVE-AIRE DU50HFA Centrifugal Upblast Exhaust Fan comes with a one-year warranty from the date of purchase.

For warranty claims, technical assistance, or any product-related inquiries, please contact CAPTIVE-AIRE technical support. Ensure you have your model number (DU50HFA) and purchase date available when contacting support.

Contact information for technical support can typically be found on the product packaging or the official CAPTIVE-AIRE website.