175Z7359 by Danfoss

The 175Z7359 is an AC drive manufactured by Danfoss for the VLT 6000 HVAC Drives series. As an HVAC-specific variable-frequency inverter, it modulates motor speed so air handlers, pumps, and cooling towers match real-time load demands in industrial automation and commercial building systems. It is identified as an HVAC drive, providing dedicated control for centrifugal fans and centrifugal pumps that would otherwise run at fixed mains frequency.

This model is housed in a Compact NEMA 1 enclosure that permits panel mounting inside conditioned equipment rooms while still providing a touch-safe housing against incidental contact. It accepts a single-phase or three-phase input within the 200-240 VAC range, allowing direct connection to low-voltage building power networks without an autotransformer. The inverter can deliver up to 5.5/7.5 kW/HP of mechanical output, matching mid-sized fan wheels and secondary loop pumps. A front-mounted control interface is supplied with an LCP, and the local panel offers start-stop keys and parameter access for local operation. Internally, the electronics follow the Danfoss baseline as a standard unit, so the hardware footprint, cooling path, and connector layout remain consistent across other ratings in the same series.

The drive is shipped without a filter, so any conducted RFI mitigation must be handled by cabinet-level line chokes when the installation is near sensitive instrumentation. The drive has no coating, which restricts use to clean, low-humidity switch rooms rather than corrosive process areas. Both the fieldbus port and the application option slot have no options installed, so network control must rely on the LCP or hard-wired I/O unless aftermarket modules are added. The unit uses the Graham application profile, so the default parameter set suits similar air movement equipment.