175Z7282 by Danfoss

The 175Z7282 is an AC variable-frequency drive manufactured by Danfoss for the VLT 6000 HVAC Drives series. It is engineered for HVAC automation, where it regulates fan or pump motors so airflow and water flow match real-time building demand, which can improve energy efficiency and reduce mechanical stress on driven equipment. By adjusting motor speed instead of relying on throttling dampers or valves, the drive serves as a central control element in commercial air-handling units and chilled-water loops. Its operating role makes it suitable for systems that need stable motor control during changing load conditions throughout the day.

The enclosure is rated as Compact NEMA 1, so the unit can be mounted indoors in electrical rooms without a separate gasketed cabinet. Its input supply window of 380-460 VAC aligns with common three-phase power systems found in large facilities, and a power rating of 2.2 kW / 3.0 HP allows it to start and modulate standard 3 HP induction motors used on supply fans or small booster pumps. Conducted emissions are reduced by the integrated Class A1 and B filter, which helps the installation meet typical EMC limits in commercial environments. The front panel comes with an LCP, giving direct parameter access and local start-stop control without an external keypad. Circuit boards are supplied without a protective coating, so the electronics are intended for clean, conditioned spaces rather than corrosive or high-humidity areas.

The drive is supplied with no fieldbus options, so speed references, status signals, and fault indications are handled through analog and digital terminals instead of through BACnet or LonWorks communication. It is shipped as a standard unit, so cooling, control, and protection functions use the base configuration without modular add-ons. This arrangement supports installations that rely on conventional hardwired control schemes in air-handling units and pump panels. It also fits applications where simple terminal-based integration is preferred over network-based building automation links.