Product Description:

The 178B4810 is a variable-frequency drive manufactured by Danfoss for the VLT 6000 HVAC Drives series. Designed for fan, pump, and compressor duties in building services, it is intended for heating, ventilation, and air-conditioning installations. The unit modulates three-phase induction motors to match airflow or water-flow requirements as demand changes, reducing unnecessary motor operation while maintaining process control. This variable-speed operation is suitable for large air-handling systems, chilled-water circulation systems, and other motor-driven building equipment that experiences changing loads throughout the day.

The drive connects to three-phase supply lines rated at 380–460 VAC, allowing deployment on common 400 V distribution networks without an autotransformer. Its power section can deliver up to 90 kW (125 HP), supplying adequate torque for large air-handling units or chilled-water pumps. A compact IP20 housing permits installation inside a switchboard where basic protection against accidental contact is sufficient. Additional enclosure protection can be provided by the surrounding cabinet when the installation requires greater resistance to dust or moisture. Radio-frequency interference is attenuated by the integrated Class A1 and Class B filter, helping the panel meet applicable industrial electromagnetic compatibility limits. Operators can adjust speed, review operating values, and view status messages through the detachable LCP local control panel. The removable panel provides direct access to drive settings without requiring a permanently installed external keypad.

The drive is configured for HVAC applications, and its control functions include predefined airflow and pump macros. These functions support common building-service processes without requiring a separate control arrangement for every basic fan or pump task. Internally, it remains a standard unit, with no factory-installed hardware expansions such as enhanced input and output functions or additional relays. The model has no fieldbus option, so control-system integration relies on hardwired terminals unless an external gateway is added. This arrangement supports conventional analog and digital control signals from building automation equipment. The circuit boards have no conformal coating, so the drive should be installed in a clean, dry enclosure that limits exposure to condensation, conductive dust, and corrosive airborne contaminants. Suitable cabinet ventilation should also prevent moisture accumulation around the uncoated electronic assemblies during normal operation.