176F0723 by Danfoss

The 176F0723 is a variable frequency drive manufactured by Danfoss for the VLT 6000 HVAC Drives series. It is intended for controlling the speed of induction motors in building air-handling units, chillers, and pump circuits so that airflow or water flow matches real-time demand. By modulating motor frequency instead of using throttling dampers or valves, the unit reduces energy consumption and lowers mechanical stress across HVAC equipment in industrial automation and commercial facilities.

Designed around HVAC service points, the drive accepts a three-phase supply of 380-460 VAC, allowing direct connection to typical utility feeders without a step-down transformer. Its enclosure is a compact IP 54 housing, which protects internal electronics against dust accumulation and water splashes common in mechanical rooms. For electromagnetic compatibility, a factory-installed Class A1 filter attenuates conducted emissions on the mains line. A removable LCP keypad offers parameter access, local start and stop control, and real-time readouts. The default application macro is set for HVAC operation, so preset PID loops are aimed at fan pressure or water temperature regulation and can be activated without additional programming.

The platform is shipped as a standard unit, so its power components, control boards, and cooling passages follow the baseline design. Protective lacquer is omitted, and the boards are supplied without coating, which supports heat dissipation but requires installation in conditions consistent with the enclosure rating. The internal control board has no fieldbus options, so external gateways are needed when remote communication protocols are required. The product is grouped under HVAC Drives, so its parameter structure uses temperature-control terms common in building-management systems.