Lennox 24B74 (622785-31) – Variable Frequency Drive (VFD) Replacement Kit, 5 HP, 460 VAC, 3-Phase

 

The Lennox 24B74 – 622785-31 Variable Frequency Drive Replacement Kit is a high-performance VFD engineered to deliver precise motor control, improved efficiency, and stable operation in demanding HVAC applications. Designed specifically for Lennox commercial equipment, this 5 HP, 460 VAC, 3-phase drive ensures accurate modulation of blower and motor speeds, helping reduce energy consumption while maintaining optimal airflow across heating and cooling cycles.

This OEM Lennox VFD kit includes the correct drive module and required components for a seamless field replacement, ensuring compatibility, safe operation, and long-term reliability. Ideal for rooftop units, air handlers, and commercial systems requiring precise variable-speed control.

 

Key Features

• OEM Lennox 24B74 622785-31 variable frequency drive replacement kit for commercial HVAC systems
• 5 HP, 460 VAC, 3-phase motor control for stable, efficient operation
• Supports variable-speed modulation to enhance airflow performance and energy efficiency
• Designed for Lennox commercial units for guaranteed fit and system compatibility
• Helps reduce power consumption and improve equipment longevity
• Includes required replacement components for straightforward installation

 

Applications

• Commercial rooftop units
• Lennox variable-air-volume (VAV) systems
• Air handlers and multi-speed commercial HVAC equipment
• Motor control in high-demand environments requiring precise speed regulation

 

Technical Specifications

• Model: Lennox 24B74 / 622785-31
• Type: Variable Frequency Drive (VFD) Replacement Kit
• Motor Rating: 5 HP
• Input Power: 460 VAC
• Phase: 3-Phase
• Application: Commercial HVAC motor speed control
• Compatibility: OEM Lennox commercial units (model-specific; verify with model/serial)