Multi Products 2781AS Actuator

The Multi Products 2781AS Actuator is a heavy-duty 120V damper motor specifically engineered for high-torque applications in commercial HVAC and ventilation systems. This UL6 compliant unit features a Clockwise (CW) rotation and is built with a rugged Type B square shaft configuration to ensure a secure, slip-free connection to damper linkages. Professionals often utilize this model as a reliable Ruskin damper actuator replacement, providing direct compatibility where precision airflow control is required. Designed with a zinc die-cast housing and a heavy-duty metal geartrain, the 2781AS delivers a stall torque of 45 in-lb at a rated speed of 2 RPM. The UL recognized impedance protected coil ensures thermal stability during continuous duty, while the dust-proof enclosure protects internal components in demanding mechanical room environments. This square shaft actuator is the industry standard for contractors seeking direct-drive damper control with a 120-volt power supply, offering seamless integration into existing HVAC control systems without the need for complex mounting modifications.

• High Torque Performance: Delivers 45 in-lb stall torque, making it ideal for managing medium to large damper sections effectively.
• Rugged Construction: Features a heavy-duty metal geartrain and zinc die-cast housing for maximum durability in commercial environments.
• Easy Installation: The Type B square shaft design ensures a positive mechanical connection with standard HVAC damper hardware.
• Safety Rated: UL6 and UL14V compliant with an impedance protected coil to prevent overheating during stalled conditions.
• Precision Control: Maintains a consistent 2 RPM output speed for steady, reliable air volume regulation.

Is the 2781AS compatible with Ruskin dampers?
Yes, the 2781AS is a primary replacement motor for many Ruskin installations. It is crucial to verify that your existing unit has a CW rotation and a square shaft before installation.

What should I do if my motor is stalling?
First, inspect the damper blades for debris or mechanical binding. While the 2781AS has a 45 in-lb torque rating, excessive resistance from frozen linkages or damaged seals can prevent the square shaft from turning.

Can I use this for spring-return applications?
This specific model is engineered for high-performance power-open/power-close or floating control. For spring-return requirements, ensure your linkage allows for the 2 RPM speed and 0.09 stall amps draw.

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.