1 HP, 115 VAC Direct Drive Furnace Blower Motor

DiversiTech WG840595 1 HP 115V Direct Drive Furnace Blower Motor

The DiversiTech WG840595 is a 1 HP, 115 VAC direct drive furnace blower motor engineered for reliable residential HVAC applications. This motor delivers 1075 RPM performance at 5.4 amps, providing consistent airflow for forced-air furnaces while operating quietly and efficiently. Built with Class B insulation and automatic thermal overload protection, it's designed for HVAC professionals and homeowners who need a dependable replacement motor that installs quickly using standard 48-frame mounting brackets.

Key Features & Benefits

• 1 HP Power Output at 115V: Delivers robust 1075 RPM performance on standard residential voltage, ensuring strong, consistent airflow without requiring specialty electrical circuits.
• Three-Speed Operation: Offers 1075/3 speed configuration for flexible airflow control, letting you match the motor speed to your system's ductwork and heating demands.
• Automatic Thermal Overload Protection: Built-in thermal protector shuts down the motor if it overheats, preventing damage and extending motor lifespan without manual intervention.
• Standard 48 Frame Motor Casing: Installs directly using all standard 48-frame mounting brackets, eliminating the need for custom hardware and reducing installation time.
• Electrically Reversible: Allows field reversal of motor rotation direction, simplifying installations where airflow direction must change without repositioning the motor.
• Class B Insulation: Provides high-temperature protection for motor windings, ensuring safe operation and durability even in demanding furnace environments.
• Low Power Consumption Design: Operates at 12.6 FLA (Full Load Amps) while maintaining 1 HP output, reducing operating costs compared to less efficient motors.
• Quiet Operation: Engineered for minimal noise during continuous duty cycles, making it suitable for installations near living spaces.

Compatibility & Requirements

This motor requires a 370 VAC capacitor (not included) and operates on 60 Hz power. It features a 2.5-inch diameter hub and includes 2.5-inch diameter hub rings for blower wheel attachment. The motor operates in an air-over cooling configuration, meaning it must be mounted with airflow passing over the housing for proper thermal management. It is designed for continuous duty operation in forced-air furnace applications.

Installation & Care

The WG840595 installs using any standard 48-frame blower motor mounting bracket system. The motor is electrically reversible, allowing technicians to change rotation direction by reconnecting the internal wiring as needed during installation. Proper airflow over the motor housing is required for cooling during continuous operation.

What's Included

• Direct drive furnace blower motor
• 2.5-inch diameter hub rings

Frequently Asked Questions

Q: Will this 1 HP 115V motor work as a replacement in my existing furnace?
A: The WG840595 is compatible with any furnace using a standard 48-frame blower motor mounting bracket. It operates on 115 VAC at 60 Hz and requires a 370 VAC capacitor. Verify your existing motor uses 48-frame mounting and that your system provides adequate airflow over the motor housing for air-over cooling before replacing.

Q: What are the electrical specifications and amp draw for this motor?
A: This motor operates on 115 VAC single-phase power at 60 Hz. It draws 5.4 amps during normal operation and has a full load amperage (FLA) rating of 12.6 amps. The motor delivers 1 HP at 1075 RPM and requires a 370 VAC capacitor to start and run properly.

Q: How do I wire this blower motor and what capacitor does it need?
A: The WG840595 requires a 370 VAC capacitor for operation (sold separately). The motor is electrically reversible, meaning its internal wiring can be reconfigured to change rotation direction. Consult the product specification sheet and follow National Electrical Code guidelines when connecting power and capacitor leads. If you are not a licensed technician, hire a qualified HVAC professional for installation.

Q: Does this motor come with thermal overload protection?
A: Yes, the WG840595 includes an automatic thermal overload protector built into the motor. This safety device shuts down the motor if internal temperatures exceed safe operating limits, preventing winding damage and protecting your furnace system. The motor will automatically reset once it cools to a safe temperature.

Q: What does "three-speed" mean and how do I change speeds?
A: The motor provides three operational speeds at 1075 RPM increments (1075/3), allowing you to adjust airflow output by connecting to different speed taps on the motor. Speed selection is made during installation by wiring to the appropriate motor lead. This flexibility lets you match motor output to your ductwork and heating requirements without replacing the motor.

Q: Can I reverse the direction this motor spins?
A: Yes, the WG840595 is electrically reversible. A qualified technician can reconfigure the internal motor wiring to change the direction of rotation without removing or repositioning the motor. This feature simplifies installations where blower wheel orientation or airflow direction needs to change.

Q: What frame size is this motor and will my existing mounting bracket fit?
A: This is a standard 48-frame motor with a 48-frame motor casing. It installs using all standard 48-frame mounting brackets commonly used in residential furnaces. The motor includes 2.5-inch diameter hub rings for attaching your blower wheel to the motor shaft.

Q: Is this motor rated for continuous operation?
A: Yes, the WG840595 is rated for continuous duty operation in forced-air heating systems. It features Class B insulation for high-temperature protection and operates in an air-over cooling configuration, meaning airflow from the blower must pass over the motor housing to maintain proper operating temperatures during extended run cycles.

Q: What does "air over" cooling mean for this motor?
A: Air-over cooling means the motor relies on airflow passing over its housing to dissipate heat during operation. This is standard for direct drive furnace blower motors, where the blower wheel itself moves air across the motor body. Ensure your blower assembly provides adequate airflow over the motor for proper cooling during continuous operation.

Q: What are the shaft dimensions and hub ring size included with this motor?
A: The motor includes 2.5-inch diameter hub rings for mounting a blower wheel to the motor shaft. These hub rings provide a secure connection between the motor and your furnace blower wheel. Verify your existing blower wheel is compatible with a 2.5-inch hub before ordering.