Allied Air LX7921 Direct Drive Blower Motor 1/2 Hp 115V

Product Description

The ALLIED AIR LX7921 is a direct drive fan and blower motor rated at 1/2 HP and designed for residential and light commercial HVAC air-handling applications. Operating on 115 volts AC, single-phase, 60 Hz power, it draws 8 amps at full load and spins at 1075 RPM. The motor offers 5 speeds, giving technicians the flexibility to match airflow to system requirements during commissioning. It is housed in an open air-over (OAO) enclosure and mounts via a flex bracket, making it a common replacement choice in forced-air systems where space and vibration tolerance are factors. An automatic reset thermal overload protector is built in for motor protection.

This motor is suited for direct drive blower assemblies in residential forced-air furnaces, air handlers, and package units. The 48Y NEMA frame and flex bracket mounting are standard configurations found across a wide range of residential equipment. The 5-speed taps allow airflow adjustment to meet heating, cooling, and continuous fan operating modes. Licensed HVAC technicians typically handle this replacement as part of blower section service or motor failure diagnosis.

Key Features

• 1/2 HP output with 5-speed taps for flexible airflow configuration
• 115V AC, single-phase, 60 Hz operation at 8 amps full load
• 1075 RPM speed rating standard for residential blower applications
• 48Y NEMA frame with flex bracket mount for broad fitment
• OAO enclosure rated for air-over cooling in blower assemblies
• Automatic reset thermal overload protector for motor protection
• Class B insulation with a 1.0 service factor

Compatibility

Designed as an OEM-style direct drive blower motor replacement for residential and light commercial forced-air HVAC systems using a 48Y frame flex bracket configuration.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all electrical power to the air handler or furnace before removing the existing motor. Verify voltage, amperage, RPM, rotation direction, and speed tap wiring match system requirements before energizing. Refer to the equipment wiring diagram for proper speed tap selection and ensure the flex bracket is secured to prevent vibration-related fatigue.

Technical Specifications

• Power Rating: 1/2 HP
• Voltage Rating: 115 volts AC, 1-Phase
• Frequency Rating: 60 Hz
• Full Load Amps: 8 amps
• Speed Rating: 1075 RPM
• Number of Speeds: 5
• NEMA Frame Size: 48Y
• Mounting: Flex Bracket
• Enclosure Type: OAO (Open Air-Over)
• Insulation Class: B
• Service Factor: 1.0
• Application: Direct Drive Fan and Blower
• Weight: 15 pounds

Standard Information

• Brand: ALLIED AIR
• Manufacturer Part Number: LX7921