Overview This listing is for a USED Danfoss 175Z7049 VLT6000 HVAC Variable Frequency Drive. It is designed for controlling AC induction motors in HVAC systems and general industrial applications. This unit is rated at 2.2kW (approx. 3 HP) and supports 3‑phase 380‑460V input with output frequency control from 0.1 to 1000Hz. The VLT6000 series includes features suited for fan, pump, and air‑handling applications.