Lennox 41K91 Motor
The Lennox 41K91 is a commercial-grade, multi-speed condenser fan motor designed for high-static applications in 460V HVAC systems. This 1/3 HP motor operates at a nominal 825 RPM, providing the specific torque curves required for heat dissipation in large-tonnage Lennox rooftop units (RTU) and split systems. Engineered with a 48-frame diameter and an OAS (Open Air Over) enclosure, it ensures optimal thermal management during continuous operation. As a two-speed motor, it allows for modulated airflow, which is critical for maintaining head pressure in varying ambient conditions. When replacing an original equipment manufacturer (OEM) part, this 460V single-phase motor ensures correct shaft alignment and electrical compatibility, preventing the premature bearing wear or capacitor failure often associated with generic alternatives. This Lennox replacement motor is a direct drop-in for units requiring precise 825 RPM 460V specifications, maintaining the factory-designed airflow profiles and electrical load balancing.
Key Technical Benefits
- Direct OEM Compatibility: Specifically engineered for Lennox HVAC units, ensuring correct lead lengths and mounting patterns.
- Two-Speed Flexibility: Supports multi-stage cooling configurations for improved EER and part-load efficiency.
- High-Voltage Durability: Optimized for 460V 1-phase industrial power supplies with robust internal insulation.
- Permanent Split Capacitor (PSC) Design: Known for reliable starting torque and consistent performance under high-static loads.
- Thermal Overload Protection: Features internal sensors to prevent winding failure during extreme ambient temperature spikes.
Common Installation Questions
What capacitor is required for the Lennox 41K91?
This motor requires a specific MFD/VAC rated run capacitor. Always check the nameplate on the 41K91, as using an undersized capacitor can lead to overheating and reduced torque.
Can I use this to replace a 1075 RPM motor?
No, this is an 825 RPM motor. Installing a motor with a different RPM rating will disrupt the CFM across the coils, potentially causing compressor failure or liquid slugging.
Is this motor reversible?
The 41K91 is typically set for a specific rotation. Verify the rotation (CW or CCW) from the lead end before securing the fan blade to ensure proper airflow direction.
This item is not eligible for free shipping.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Lennox 41K91 is a commercial-grade, multi-speed condenser fan motor designed for high-static applications in 460V HVAC systems. This 1/3 HP motor operates at a nominal 825 RPM, providing the specific torque curves required for heat dissipation in large-tonnage Lennox rooftop units (RTU) and split systems. Engineered with a 48-frame diameter and an OAS (Open Air Over) enclosure, it ensures optimal thermal management during continuous operation. As a two-speed motor, it allows for modulated airflow, which is critical for maintaining head pressure in varying ambient conditions. When replacing an original equipment manufacturer (OEM) part, this 460V single-phase motor ensures correct shaft alignment and electrical compatibility, preventing the premature bearing wear or capacitor failure often associated with generic alternatives. This Lennox replacement motor is a direct drop-in for units requiring precise 825 RPM 460V specifications, maintaining the factory-designed airflow profiles and electrical load balancing.
Key Technical Benefits
- Direct OEM Compatibility: Specifically engineered for Lennox HVAC units, ensuring correct lead lengths and mounting patterns.
- Two-Speed Flexibility: Supports multi-stage cooling configurations for improved EER and part-load efficiency.
- High-Voltage Durability: Optimized for 460V 1-phase industrial power supplies with robust internal insulation.
- Permanent Split Capacitor (PSC) Design: Known for reliable starting torque and consistent performance under high-static loads.
- Thermal Overload Protection: Features internal sensors to prevent winding failure during extreme ambient temperature spikes.
Common Installation Questions
What capacitor is required for the Lennox 41K91?
This motor requires a specific MFD/VAC rated run capacitor. Always check the nameplate on the 41K91, as using an undersized capacitor can lead to overheating and reduced torque.
Can I use this to replace a 1075 RPM motor?
No, this is an 825 RPM motor. Installing a motor with a different RPM rating will disrupt the CFM across the coils, potentially causing compressor failure or liquid slugging.
Is this motor reversible?
The 41K91 is typically set for a specific rotation. Verify the rotation (CW or CCW) from the lead end before securing the fan blade to ensure proper airflow direction.
This item is not eligible for free shipping.
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.
