Us Motors 1814 Three Phase Ac Motor 1.5 Hp 1725 Rpm

Product Description

The US MOTORS 1814 is a three-phase, standard-efficiency AC motor built for commercial and industrial HVAC applications. Rated at 1.5 horsepower and 1725 RPM, it operates on 60 Hz power and is housed in an OPAO (open protected air over) enclosure suited for airstream-cooled installations. The 56HZ frame with rigid mount configuration makes it a direct-fit replacement in belt-drive or direct-drive fan assemblies. Ball bearings, Class B insulation, and a 1.15 service factor give this motor reliable continuous-duty performance in demanding environments. Automatic thermal protection guards against overload without manual reset intervention.

The 1814 is designed for HVAC system installations where three-phase power is available, including rooftop units, air handlers, and commercial fan applications. The reversible rotation allows the installer to configure shaft direction to match the driven load. A 5/8-inch shaft diameter at 1-7/8 inches in length fits standard 56HZ-frame couplings and pulleys. Full load amperage is rated at 5 amps on one voltage configuration and 2.5 amps on another, accommodating dual-voltage wiring setups typical in light commercial equipment rooms.

Key Features

• 1.5 HP three-phase output at 1725 RPM nameplate speed
• OPAO enclosure rated for open air-over installations in duct or airstream environments
• Rigid mount on 56HZ frame for drop-in replacement compatibility
• Reversible motor rotation for flexible field installation
• Automatic thermal overload protection for continuous-duty protection
• 1.15 service factor provides headroom above nameplate load

Compatibility

Designed as an OEM-style replacement three-phase AC motor for commercial HVAC equipment using a 56HZ rigid-mount frame configuration with air-over enclosure requirements.

Installation Notes

Installation should be performed by a qualified electrician or HVAC technician familiar with three-phase motor wiring per NEC guidelines. Disconnect and lock out all power before removing the existing motor or making any wiring connections. Verify that the supply voltage and phase configuration match the motor nameplate before energizing. Confirm shaft alignment and belt tension after mounting to prevent premature bearing wear.