Century Motors 391A Motor
The Century Motors 391A HVAC Blower Motor is a 230V single-phase replacement motor designed for compatible heating, ventilation, and air conditioning equipment. Featuring a nominal 1050 RPM operating speed, three selectable speeds, and a 42-frame configuration, this motor is intended for blower and fan applications requiring the specified electrical and mechanical characteristics.
The Century 391A 3-speed motor features an open air-over (OAO) enclosure, which relies on airflow across the motor for proper cooling. Correct installation is important for maintaining operating temperature, airflow performance, and motor service life. Select the appropriate speed connection according to the equipment wiring diagram and application requirements.
Before replacing an existing HVAC blower motor, confirm the original motor part number, horsepower, voltage, frequency, RPM, rotation direction, shaft dimensions, mounting arrangement, and capacitor requirements. Do not substitute based on frame size or voltage alone. Verify that the installation provides adequate cooling airflow and that the blower assembly rotates freely before returning the equipment to operation.
Key Benefits
-
230V single-phase operation for compatible HVAC electrical systems.
-
1050 RPM nominal speed for specified blower applications.
-
Three selectable speeds for compatible airflow configurations.
-
42-frame motor construction for matching mechanical installations.
-
Open air-over cooling design for applications with adequate airflow.
-
Century Motors 391A part identification for replacement matching.
Common Questions
Q: What are the electrical specifications of the Century Motors 391A?
A: The supplied product information identifies a 230V, single-phase motor with a nominal speed of 1050 RPM and three speed selections.
Q: What does OAO mean on the Century 391A motor?
A: OAO means open air-over. The motor requires airflow across its housing for cooling and must be installed in an application designed to provide that airflow.
Q: Can the Century 391A replace another 42-frame blower motor?
A: Only if the horsepower, voltage, speed, rotation, shaft, mounting, electrical, and cooling requirements match the original motor and equipment specifications.
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.
391A is the cross for 391, HC37SA651