176F2985 by Danfoss

The 176F2985 is an AC variable-frequency drive manufactured by Danfoss and supplied in the VLT 6000 HVAC Drives series. Intended for building automation, the drive modulates motor speed so fan or pump output tracks real-time demand, improving energy use and reducing mechanical wear in ventilation systems. It is suited for applications that need controlled airflow or water circulation instead of constant full-speed motor operation.

Rated at 18.5/25 kW/HP, the unit handles the power range commonly required by midsize air-handling equipment. It accepts a three-phase input of 380-460 VAC, matching standard commercial mains without additional step-up or step-down hardware. All electronics are housed in a Compact NEMA 1 enclosure that allows indoor panel mounting while shielding personnel from live conductors. Network integration is provided through a LonWorks free topology port, enabling communication over unshielded twisted pair in flexible building-control layouts. Local operation and parameter access are carried out with the included LCP, which displays frequency, current, and alarm codes. Because the package is a standard unit, it does not require auxiliary heat-sink kits or extended I/O cards for normal installation.

The EMC section ships without a filter, so external RFI suppression may be added when nearby instrumentation requires tighter emission control. Circuit boards carry no coating, indicating the drive is intended for clean mechanical rooms rather than corrosive or high-humidity areas. The unit has no options, so the terminal layout remains consistent across this model. Danfoss designates the target application as Graham, a reference profile aligned with typical large-scale ventilation sequences, and the product type remains HVAC Drives for pressure, temperature, and flow control loops in modern building management systems.