Multi Products 3174 Actuator

The Multi Products 3174 Actuator is a heavy-duty, 24V 2RPM round shaft actuator engineered for precise damper control and ventilation automation in commercial and residential HVAC systems. As a veteran-preferred HVAC replacement motor, this unit features a 0.3125-inch diameter round shaft, providing a robust interface for damper linkages. Built with a zinc die-cast housing and a high-torque metal geartrain, the 3174 is designed to handle the mechanical stresses of continuous duty cycles in environmental control applications. This internal gearmotor assembly is UL recognized and utilizes an impedance-protected coil to prevent thermal overload during stalled conditions, ensuring long-term reliability in the field. When replacing an existing unit, technicians should verify the 4-digit SPEC number stamped on the housing to ensure 100% mechanical and electrical compatibility with the current system configuration.

• 24V AC synchronous motor provides consistent 2RPM output speed for reliable opening and closing of dampers.
• Heavy-duty metal geartrain ensures high-torque performance and durability compared to plastic alternatives.
• Dust-proof zinc die-cast housing protects internal components from debris in mechanical rooms and ductwork.
• Standard round shaft design allows for universal compatibility with common HVAC lever arms and linkages.
• Impedance-protected electrical design prevents damper actuator failure during unexpected obstructions.

What is the shaft size for the Multi Products 3174?
The 3174 features a standard 0.3125-inch round shaft, which is compatible with a wide range of universal HVAC lever arms and mounting hardware.

Can I use this 24V actuator with a 120V system?
No, this is a 24VAC actuator. Connecting this unit to a 120V power source will cause immediate electrical failure and represents a safety hazard.

Is the Multi Products 3174 suitable for spring-return applications?
While this unit provides excellent torque, always check your specific damper motor requirements. This model is typically used for power-open/power-close or floating control depending on your wiring setup.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.