The Fuji FRN100AR1M-4U is a FRENIC-HVAC series drive rated for 100 HP on a 3-phase 460 VAC supply, housed in a NEMA Type 1 enclosure. That NEMA 1 rating means it's for indoor use where dripping water or dust isn't a concern — think a mechanical room or electrical closet, not a washdown zone. The 100 HP rating at 460 V tells you it's sized for a 100 HP motor load; if you're matching it to a pump or fan in an HVAC application, that's the number that governs the BOM line.
What you're getting — the FRENIC-HVAC series
The FRENIC-HVAC series is Fuji's dedicated line for pump, fan, and compressor applications in commercial HVAC. The FRN100AR1M-4U fits that role: 100 HP, 460 V, three-phase input and output. The NEMA 1 enclosure keeps the power section and control board behind a sheet-metal cover suitable for clean indoor environments. If you're replacing a failed drive on a chiller or air handler, this is the direct drop-in for that horsepower class.