Danfoss FC111P11KT4 VLT HVAC Basic Drive

Product Overview

The Danfoss FC111P11KT4 (VLT HVAC Basic Drive) is a high-performance frequency converter engineered for reliable motor control in commercial and industrial HVAC systems. With a nominal shaft output of 11.0 kW (15.0 HP), this drive provides precision speed regulation for air handling units, pumps, and cooling towers. Designed to optimize energy usage with an efficiency rating of up to 98.1%, the FC-111 reduces operational costs while minimizing mechanical strain on critical infrastructure. Its robust architecture ensures stable performance in continuous-duty applications, helping facility managers maintain climate control efficiency and prevent costly system downtime.

Technical Configuration

The FC111P11KT4 features a streamlined, high-efficiency design optimized for building automation environments:

• HVAC Series: VLT HVAC Basic Drive, specifically tuned for fan and pump torque curves.
• Power Capacity: Supports 11.0 kW (15.0 HP) motors, accommodating three-phase power supplies from 380-480 VAC.
• Output Performance: Delivers a continuous current of 23.0 A (at 380-440 V) at 40 deg C, with dynamic intermittent current handling for startup transitions.
• Enclosure Protection: IP20 / Open-type chassis, designed for seamless integration within standard NEMA or IP-rated electrical enclosures.
• Connectivity: Equipped with terminal blocks supporting cable sizes up to 16 mm2 (6 AWG), ensuring a secure, low-resistance power path for industrial installation requirements.

Technical Specifications

Frequently Asked Questions

Is this drive suitable for environments up to 50 deg C?

Yes, the unit is rated for operation at 50 deg C ambient temperature; however, users should note the current derating to 20.9 A (at 380-440 V) to ensure safe, continuous operation without overheating.

Can the FC-111 series handle regenerative braking?

The VLT HVAC Basic Drive is primarily designed for variable torque loads like fans and pumps. If your application involves high-inertia loads or frequent braking, an external braking solution may be required.

How does the drive minimize electromagnetic interference?

The FC-111 series adheres to industrial standards for emission control. Proper installation, including the use of shielded motor cables and a solid connection between the cable shield and the drive's chassis, is critical to maintaining this compliance.

Engineering Guidelines and Installation Best Practices

• Thermal Management: The drive generates up to 274 W of heat at typical load. For cabinet-mounted installations, ensure a calculated airflow volume sufficient to remove this heat. Maintain a minimum vertical clearance of 150 mm above and below the drive to prevent heat accumulation around the power modules.
• Wiring Requirements: Use copper conductors rated for at least 75 deg C. Ensure the protective earth (PE) connection is firmly secured to the drive chassis, as the PE connection is vital for both safety and electromagnetic noise suppression in the HVAC control loop.
• Preventative Inspection: Periodically check the cooling fan's intake for dust or debris. HVAC environments often contain airborne particulates that can clog airflow paths, leading to reduced efficiency and increased power loss.