Danfoss FC111P37KT4 VLT HVAC Basic Drive

Description

The Danfoss FC111P37KT4 is a high-performance VLT HVAC Basic Drive engineered to optimize energy efficiency in ventilation, heating, and air conditioning applications. Rated for a typical shaft output of 37.0 kW (40.0 hp), this variable frequency drive provides precise motor speed control, effectively reducing operational costs and extending the lifespan of mechanical equipment in HVAC systems.

This VLT HVAC Basic Drive is designed for robustness and reliability in demanding industrial environments. With an IP20 protection rating, it is built to operate within a wide range of input voltages (3x380–480 V) while maintaining high efficiency—up to 97.7% in typical operating conditions. The unit includes advanced current management capabilities to handle both continuous and intermittent loads, ensuring stable performance at varying ambient temperatures.

Features

• Optimized for HVAC fan and pump applications
• High operational efficiency up to 97.7%
• Dual voltage and current ratings for flexible application (380–440 V and 441–480 V)
• Supports ambient temperatures up to 50 degC with derated output
• Compact IP20 enclosure design
• Designed for standard industrial motor control

Applications

• Commercial and industrial HVAC systems
• Variable air volume (VAV) systems
• Cooling tower fans
• Centrifugal pump control
• Air handling units

Technical Specifications

Output Performance (at 40 degC ambient):

Output Performance (at 50 degC ambient):

Installation Guidelines

• Ventilation: Due to the 922 W power loss, ensure adequate cabinet ventilation or cooling to prevent overheating, especially when operating near the 50 degC ambient limit.
• Cabling: Use shielded cables for motor connections to minimize electromagnetic interference (EMI). Ensure terminals are tightened to accommodate up to 35 mm2 (2 AWG) wire size.
• Grounding: Proper earthing of the drive frame is essential for safety and to comply with electromagnetic compatibility (EMC) standards.
• Clearance: Maintain the recommended clearance distances around the drive as specified in the manual to ensure optimal airflow through the heat sink.