Danfoss FC111P22KT4 VLT HVAC Basic Drive 22kW

Product Overview

The FC111P22KT4 (FC-111P22KT4) is a high-performance frequency converter from the Danfoss VLT HVAC Basic Drive series, specifically engineered to optimize fan and pump applications. With a robust 22 kW (30 HP) power rating, this drive is a critical asset for building automation systems, cooling towers, and industrial ventilation. The FC111P22KT4 excels at reducing energy consumption and operational costs by providing precise flow control and integrated HVAC functions. Its compact H5 enclosure design and 98.1 percent peak efficiency rating make it an ideal solution for facility managers looking to maximize system uptime while minimizing the carbon footprint of large-scale climate control infrastructure.

Technical Configuration

The VLT HVAC Basic Drive is built for simplicity and reliability in demanding commercial environments. Its hardware architecture is optimized for seamless integration into existing HVAC control loops.

• Power Density: Delivers a continuous output of 42.5 A at 400 V, housed in a space-saving H5 frame size that simplifies cabinet layout.

• Thermal Management: Engineered to maintain high performance even in elevated temperatures, providing a continuous 38.0 A output at 50 deg C ambient conditions.

• Energy Efficiency: Features a "best case" efficiency of 98.1 percent, significantly reducing heat dissipation within electrical rooms.

• HVAC-Specific Firmware: Includes built-in functions such as Fire Mode, Pump Auto-Tuning, and Sleep Mode to protect mechanical equipment and ensure occupant safety.

• Wiring Accessibility: Features terminals designed for up to 16 mm2 (6 AWG) cabling, ensuring secure electrical connections for both mains input and motor output.

Technical Specifications

Technical FAQs

What is the maximum ambient temperature the FC111P22KT4 can operate in without total shutdown?

The drive is rated for full performance at 40 deg C. It can operate at up to 50 deg C, though the continuous output current is derated (e.g., from 42.5 A down to 38.0 A at 400 V) to protect internal components from thermal stress.

Does this drive support emergency operation during a fire?

Yes, the VLT HVAC Basic Drive series includes a "Fire Mode" function. When activated, the drive ignores most non-critical alarms and protective internal trips to keep the ventilation fans running as long as possible for smoke extraction and stairwell pressurization.

What cable size is required for the mains and motor terminals?

The terminals on the H5 enclosure accept a maximum cable size of 16 mm2 or 6 AWG. It is recommended to use shielded motor cables to maintain electromagnetic compatibility (EMC) in commercial building environments.

Engineering & Installation Guide

• Vertical Airflow Management: To ensure the rated 97.9 percent efficiency and prevent overheating, the FC111P22KT4 must be mounted vertically. Maintain sufficient clearance above and below the H5 enclosure to allow the integrated fans to pull cool air through the heat sink effectively.

• Harmonic Mitigation: While the HVAC Basic Drive is highly efficient, large 22 kW loads can introduce harmonics into the building's electrical grid. Ensure the drive is integrated with appropriate line reactors or that the building’s transformer capacity is checked if multiple units are installed on the same bus.

• Motor Protection Settings: During initial commissioning, accurately enter the motor nameplate data (Current, Voltage, RPM) into the drive's parameter set. Utilize the Automatic Motor Adaptation (AMA) feature to allow the drive to measure the motor's stator resistance, which optimizes torque performance and energy savings.