Io Hvac Controls Nfx24 N4 Damper Actuator 90 In-lb 24V

Product Description

The IO HVAC CONTROLS nfx24 n4 is a spring-return damper actuator rated at 90 in-lb (10 Nm) of torque, designed for on/off control of HVAC dampers in air handling and ventilation systems. It operates on AC/DC 24 volts and features a NEMA 4X enclosure rating, making it suitable for environments exposed to moisture, dust, and washdown conditions. The spring-return mechanism drives the damper to its fail-safe position on power loss, a critical function in smoke control, outside air, and exhaust applications. Licensed HVAC technicians and controls contractors are the typical installers of this type of actuator.

This actuator is suited for commercial and industrial HVAC applications where a NEMA 4X-rated, spring-return actuator is required. Typical installations include air handling units, rooftop units, and ventilation systems that demand reliable fail-safe damper positioning. Its on/off control signal makes it straightforward to wire into two-position control schemes using standard low-voltage control panels or building automation systems.

Key Features

• 90 in-lb (10 Nm) torque output for reliable damper actuation
• Spring return provides automatic fail-safe positioning on power loss
• AC/DC 24-volt power input for broad compatibility with low-voltage control systems
• NEMA 4X enclosure rating for protection against moisture, dust, and corrosion
• On/off (open/close) control signal for simple two-position damper operation

Compatibility

Designed as an OEM-style replacement or new-installation spring-return damper actuator for use in residential and commercial HVAC duct and air handling systems requiring on/off, 24-volt control with NEMA 4X environmental protection.

Installation Notes

Installation should be performed by a licensed HVAC technician or controls contractor familiar with low-voltage wiring and NEC requirements. De-energize the control panel and confirm zero voltage at the actuator terminals before making any wiring connections. The actuator should be mounted securely to the damper shaft per the manufacturer mounting instructions to prevent slippage under load. Verify fail-safe spring-return direction is appropriate for the application before commissioning.

Technical Specifications

• Torque: 90 in-lb (10 Nm)
• Control Type: On/Off (Open/Close)
• Voltage: AC/DC 24 volts
• Return Type: Spring return
• Enclosure Rating: NEMA 4X

Standard Information

• Brand: IO HVAC CONTROLS
• Manufacturer Part Number: nfx24 n4