Century Motors RS1054AV1 Motor

The Century Motors RS1054AV1 is a high-performance 1/2 HP belt-drive blower motor designed for demanding HVACR applications. Operating at 1725/1425 RPM, this 56-frame motor features a capacitor start design to deliver the high starting torque necessary for heavy-duty fan and blower loads. Its resilient base mounting provides excellent vibration dampening, ensuring quiet operation in residential and commercial settings. Built with a versatile 115/230Vac dual-voltage rating and a 1.25 service factor, this motor handles voltage fluctuations and temporary overloads with ease. The reversible rotation and sleeve bearing system make it a flexible, field-ready replacement for various 48 and 56-frame configurations. As the direct cross-reference for Emerson 1790, the RS1054AV1 ensures seamless mechanical and electrical compatibility for contractors performing fast system restorations.

Key Benefits

• High Starting Torque: The capacitor-start induction-run (CSIR) design ensures reliable startups under heavy static pressure.
• Vibration Isolation: The resilient cradle base minimizes harmonic noise and mechanical wear across the drive assembly.
• Enhanced Durability: Features automatic overload protection and an open enclosure for optimal heat dissipation during continuous duty.
• Service Versatility: Dual-voltage 115/230V capability and reversible rotation allow for a single truck stock item to cover multiple field scenarios.
• NEMA 56 Frame Compatibility: Standardized dimensions with a 5/8-inch shaft diameter allow for easy updates to existing belt-drive systems.

Common Questions

What is the difference between RS1054AV1 and the legacy 1790 motor?
The RS1054AV1 is the modern production equivalent to the discontinued 1790. It maintains the same 56-frame footprint, horsepower, and electrical requirements, serving as a drop-in replacement without requiring modification to the mounting bracket or pulley.

Can this motor be used in 50Hz applications?
Yes, this motor is rated for 50/60Hz, providing 1425 RPM at 50Hz and 1725 RPM at 60Hz. This makes it suitable for equipment intended for international use or specific domestic applications requiring reduced speeds.

Is this motor suitable for direct-drive fans?
This specific model is engineered for belt-drive applications. While the 56-frame and 5/8-inch shaft are standard, ensure your fan blade or blower wheel is compatible with a sleeve bearing motor designed for side-loading belt tension.

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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.