Product Overview

The FC-102P5K5T4E20 (131B4220) is a premier VLT® HVAC Drive FC 102 series frequency converter, specifically engineered by Danfoss to provide advanced control and maximum energy savings for high-end building automation systems. Delivering 5.5 kW (7.5 HP) of power, this drive is the industry standard for managing sophisticated fan, pump, and chiller applications. The FC-102P5K5T4E20 distinguishes itself from basic drives through its intelligent HVAC features, including a built-in Smart Logic Controller, multiple PID loops, and an intuitive user interface. By precisely matching motor speed to actual demand, it significantly reduces energy consumption and mechanical stress, ensuring the longevity of critical HVAC infrastructure in hospitals, data centers, and commercial complexes.

Technical Configuration

The VLT® HVAC Drive FC 102 platform is designed for seamless integration into modern smart buildings. This unit operates on a three-phase 380 - 480 VAC mains supply and is housed in a compact IP20 enclosure, optimized for high-density mounting within control cabinets. The 131B4220 is built with high-quality internal DC link reactors to minimize harmonic distortion without the need for external filters. Its hardware architecture supports a wide range of I/O configurations and high-speed communication protocols. A key functional advantage is the drive's ability to operate in "Sleep Mode," which automatically detects low-flow conditions and shuts down the motor to conserve power, while remaining ready to restart instantly upon demand.

Technical Specifications

Technical FAQs

What makes the FC 102 series different from the FC 101 basic series?While both control HVAC motors, the FC-102P5K5T4E20 offers a much deeper feature set, including more advanced PID control (up to 4 internal loops), enhanced diagnostic tools, and higher modularity for fieldbus options. The FC 102 is designed for "Total Building Control" rather than simple motor speed adjustment.

Can this drive help in detecting a broken fan belt?Yes. The FC 102 includes an "End-of-Curve" and "Broken Belt" detection feature. By monitoring the relationship between power consumption and speed, the 131B4220 can trigger an alarm or stop the motor if it detects a sudden drop in load, preventing unnecessary energy waste and mechanical damage.

Is it possible to use this 5.5 kW drive on a 230 V network?No. This specific model is configured with "Mains Voltage 4," which is strictly for 380 - 480 VAC three-phase supplies. Attempting to power it with 230 V will result in an undervoltage trip, and connection to higher voltages may cause permanent damage to the internal bridge rectifier.

Engineering & Installation Guide

• Optimized Cooling: The FC 102 series utilizes back-channel cooling to dissipate heat efficiently. For the IP20 chassis, ensure a vertical clearance of at least 100 mm above and below the 6.54 kg unit. Avoid mounting the drive directly above heat-producing components like large contactors or power supplies.

• BMS Integration: When connecting the drive to a BACnet or Modbus network, use high-quality twisted-pair shielded cable. Ensure the drive is correctly addressed in the software to allow the Building Management System (BMS) to access the drive's energy meters and diagnostic registers for centralized reporting.

• EMC Best Practices: To maintain the drive's low-noise profile, ensure the motor cable is shielded and that the shield is properly grounded at the drive's metal decoupling plate. Keep control signal wires (0-10V or 4-20mA) separate from power cables to prevent electromagnetic interference from causing speed fluctuations.