FC111P7K5T4 Danfoss VLT HVAC Basic Drive 7.5kW

Product Overview

The FC111P7K5T4 (FC-111P7K5T4) is a high-efficiency frequency converter from the Danfoss VLT HVAC Basic Drive series, specifically optimized for fan and pump control in building automation. Delivering a typical shaft output of 7.5 kW (10.0 HP), this drive is engineered to maximize energy savings in climate control systems. The FC111P7K5T4 combines a compact H3 frame design with advanced software features such as the Automatic Energy Optimizer (AEO), which ensures the motor consumes only the necessary amount of power for the current load. In environments like commercial office buildings, hospitals, and hotels, this drive serves as a critical component for maintaining air quality and fluid circulation while significantly lowering operational overhead and mechanical wear on infrastructure.

Technical Configuration

The VLT HVAC Basic Drive series is designed for straightforward integration into HVAC-R architectures, prioritizing essential functionality and high efficiency.

• Space-Saving Design: The H3 frame size with an IP20 rating allows for high-density mounting within electrical cabinets, minimizing the total enclosure footprint.

• High Efficiency Architecture: Boasts a best-case efficiency of 98.2 percent, which leads to lower heat dissipation and reduced energy waste during operation.

• Thermal Performance: Engineered to maintain a continuous output of 15.5 A at 40 deg C; the drive remains operational at 50 deg C with a derated output of 14.0 A.

• Simplified Connectivity: Features terminals designed for cable sizes up to 4 mm2 (10 AWG), facilitating rapid and secure installation for both mains supply and motor connections.

• Integrated HVAC Logic: Includes a built-in PI controller, allowing the drive to manage pressure, flow, and temperature without the need for an external controller.

Technical Specifications

Technical FAQs

Can the FC111P7K5T4 operate reliably in high-temperature mechanical rooms?

Yes. The drive is rated for full performance at 40 deg C. It can operate in ambient temperatures up to 50 deg C, provided the output current is limited to 14.0 A to ensure the internal power electronics stay within safe thermal limits.

Does this drive include protection against motor damage?

The FC111P7K5T4 features comprehensive motor protection, including electronic thermal relay (ETR) monitoring for motor overload, protection against short circuits on motor terminals, and earth fault protection to prevent catastrophic failure of the drive or motor insulation.

What is the benefit of the "Automatic Energy Optimizer" (AEO)?

The AEO function allows the drive to detect the actual load of the motor and adjust the voltage-to-frequency ratio accordingly. This results in an additional 3-5 percent energy saving at partial loads compared to standard V/f control, which is highly beneficial for variable load fan applications.

Engineering & Installation Guide

• Vertical Mounting Protocol: To ensure the rated 97.8 percent efficiency and proper heat dissipation of the 198 W power loss, the drive must be mounted vertically. Ensure at least 100 mm of free air space above and below the H3 frame to facilitate natural convection.

• EMC and Shielding: In HVAC environments with sensitive electronics, use shielded motor cables. The shield should be connected to the drive's metal decoupling plate with a 360 degree clamp. This minimizes electromagnetic interference that could otherwise affect building sensors or BMS communication lines.

• Initial Setup and Tuning: Utilize the "Quick Menu" for basic commissioning. It is highly recommended to run an Automatic Motor Adaptation (AMA) during startup. This measures the motor's electrical characteristics at a standstill to optimize the drive’s internal motor model, resulting in smoother operation and higher energy efficiency.