135X3931 Danfoss VLT HVAC Drive 1.5KW/2.0HP 380-480VAC IP55

Why Choose the Danfoss 135X3931 VLT® HVAC Drive?

The Danfoss 135X3931 is a reliable and energy-efficient AC variable frequency drive (VFD) from the Danfoss VLT® HVAC Drive FC-102 series, designed specifically for heating, ventilation, air conditioning and refrigeration applications. Engineered for precise motor speed control, it helps optimise the performance of fans, pumps and compressors in commercial and industrial building services.

As part of the advanced Danfoss FC-102 HVAC drive range, this unit combines intelligent control functions with robust construction and simple commissioning. It is designed to reduce energy consumption, improve system reliability and support smooth integration into modern HVAC automation and building management systems.

With a rated output power of 1.5 kW / 2.0 HP and a three-phase 380–480 V AC supply, the Danfoss 135X3931 is ideal for small HVAC motors requiring dependable and efficient variable speed control. Its IP55 / Type 12 enclosure provides protection for installation in demanding indoor industrial environments.

Key Advantages

• Dedicated HVAC variable frequency drive for fans, pumps and compressors.
• 1.5 kW / 2.0 HP motor power rating for efficient HVAC control.
• Three-phase 380–480 V AC input suitable for industrial power supplies.
• IP55 / Type 12 enclosure for improved environmental protection.
• Graphical local control panel for easy setup and operation.
• Integrated HVAC functions help reduce external control requirements.
• Modular design allows flexible configuration and future upgrades.
• Energy-saving motor control helps lower operating costs.

Key Features

• Danfoss VLT® HVAC Drive FC-102 series.
• 1.5 kW / 2.0 HP rated output power.
• Three-phase 380–480 V AC input supply.
• IP55 / Type 12 protection rating.
• A4 frame size.
• Graphical local control panel included.
• No brake chopper configuration.
• Not coated PCB.
• Mains disconnect included.
• Designed for ventilation, heating and refrigeration applications.

Technical Specifications

• Manufacturer: Danfoss
• Series: VLT® HVAC Drive FC-102
• Model: 135X3931
• Full model code: FC-102P1K5T4Z55H2XGX1OXSXXXXAXBXCXXXXDX
• Product type: AC variable frequency drive
• Rated output power: 1.5 kW / 2.0 HP
• Input voltage: 380–480 V AC
• Input phases: 3-phase
• Application range: HVAC, ventilation, heating and refrigeration
• Protection rating: IP55 / Type 12
• Frame size: A4
• Brake chopper: No
• Control panel: Graphical Local Control Panel
• PCB coating: Not coated
• Mains disconnect: Included

Efficient Motor Control for HVAC Applications

Variable frequency drives such as the Danfoss VLT® HVAC Drive FC-102 regulate motor speed by adjusting output frequency and voltage. This allows HVAC systems to match motor performance to real demand, reducing energy waste and improving overall system efficiency.

The Danfoss 135X3931 is particularly suited to building services applications where reliable fan, pump and compressor control is required. Its HVAC-specific intelligence supports efficient operation, reduced mechanical stress and improved comfort control across modern commercial and industrial facilities.

Typical Applications

• HVAC fan speed control.
• Air handling units and ventilation systems.
• Heating and cooling systems.
• Commercial pump control.
• Refrigeration and compressor applications.
• Building management systems.
• Industrial climate control systems.

Trusted by HVAC Engineers Worldwide

Danfoss VLT® HVAC Drives are widely used by building services engineers, facilities teams and automation professionals to deliver efficient motor control, reduced energy consumption and dependable HVAC performance.