175Z7024 by Danfoss

The 175Z7024 is an AC drive manufactured by Danfoss and included in the VLT 6000 HVAC Drives series. It is intended for ventilation and chiller installations where variable-speed control of fans or pumps reduces energy consumption and extends mechanical life. By varying motor frequency rather than relying on damper throttling, the unit delivers stable airflow while integrating with building management inputs for temperature and pressure regulation. This method helps keep system output closer to real demand and reduces abrupt changes in connected equipment. It also supports smoother response when building loads rise or fall through the day.

For power compatibility, the drive accepts a three-phase input of 380-460 VAC and converts it to a regulated output for induction motors in the same voltage class. Its continuous rating is 2.2 kW / 3.0 HP, which sets the upper motor size for typical rooftop units or hydronic pumps. The housing uses a compact IP20 enclosure, so the electronics must sit inside a switchboard. To minimize conducted interference, an integrated Class A1 and B filter attenuates line-borne noise and helps meet EMC limits in commercial buildings. Day-to-day adjustments are carried out through an LCP (Local Control Panel), and the keypad and display allow frequency changes, alarm checks, and local testing without external tools.

Because the drive is tailored for HVAC use, it ships as a standard unit without application-specific hardware. The circuit boards have no coating, so the installation site must be free from corrosive vapors or high humidity that could condense on unprotected traces. The unit belongs to the HVAC Drives product family, and simple analog and relay I/O cover typical damper, valve, and interlock tasks in building-service systems. When networking is required, a separate gateway must be added because the native fieldbus slot remains unused. This arrangement suits installations that rely on straightforward control signals rather than direct network communication at the drive.