131L9867 Danfoss VLT HVAC Drive FC 101 5.5 KW

Product Overview

The 131L9867 (131L9867) is a high-efficiency VLT HVAC Drive FC 101 designed to provide superior motor control for heating, ventilation, and air conditioning systems. Engineered for a power output of 5.5 KW (7.5 HP), this three-phase frequency converter is optimized for driving fans, pumps, and compressors in commercial buildings, data centers, and hospital infrastructure. The 131L9867 focuses on extreme reliability and energy savings, featuring built-in HVAC functions that eliminate the need for external PLC controllers in many applications. Its IP20 enclosure is designed for cabinet mounting, providing a cost-effective yet powerful solution for reducing operational costs and extending the lifespan of mechanical components through soft-starting and precise speed regulation.

Technical Configuration

The FC-101 platform is built with a ruggedized power electronics architecture to withstand the demands of continuous HVAC operation. It features an integrated RFI class A1 (C2) filter, ensuring compliance with electromagnetic compatibility standards in both industrial and commercial grids. The drive includes a built-in PI controller for closed-loop regulation of pressure, flow, and temperature without requiring additional hardware. Furthermore, the unit is equipped with a "Fire Mode" safety feature, which allows the drive to ignore non-critical alarms to maintain smoke extraction or pressurization in emergency scenarios. The hardware is designed for efficient side-by-side mounting, maximizing cabinet density while maintaining thermal stability.

Technical Specifications

Technical FAQs

Does the 131L9867 include a graphical LCP display as standard?

The FC 101 series typically requires a separate LCP (Local Control Panel) for local programming. However, parameters can also be configured via the MCT 10 software through the integrated communication port.

What is the benefit of the H4 RFI filter in an HVAC application?

The H4 (A1/C2) filter minimizes high-frequency electromagnetic interference. This is crucial in commercial buildings to ensure the drive does not interfere with sensitive electronics, BMS sensors, or communication equipment sharing the same power line.

Can this drive be used for permanent magnet (PM) motors?

The FC 101 is primarily optimized for asynchronous induction motors. For high-efficiency PM motor control, please verify the specific firmware version or consider the VLT HVAC Drive FC 102 series for advanced motor compatibility.

Engineering & Installation Guide

Harmonic Mitigation: Although the FC 101 is designed for efficiency, high-power VFDs can introduce harmonics. In installations with multiple 5.5 KW drives, ensure that the total harmonic distortion (THD) at the point of common coupling meets local utility requirements. Consider using line reactors if the transformer capacity is limited.

Grounding and Shielding: To maintain the effectiveness of the C2 RFI filter, the motor cable must be shielded. The shield should be clamped to the drive’s metal backplate using a proper EMC decoupling plate. Ensure the grounding path back to the distribution board is low-impedance to prevent common-mode currents.

Fire Mode Configuration: When commissioning the "Fire Mode" function, ensure that the external control signal is fail-safe. Once activated, the drive will continue to run at the setpoint despite most internal protection trips (e.g., thermal overload), as human safety and smoke clearance take priority over equipment protection in this mode