Product Description:

The 178B2022 is an AC variable-frequency drive produced by Danfoss for the VLT 6000 HVAC Drives series. It allows building-automation controllers to vary fan and pump motor speeds according to heating and cooling demand. Adjusting motor speed helps regulate airflow and water circulation in industrial and commercial facilities. The drive can support applications such as air-handling units, cooling towers, circulation pumps, and variable-air-volume systems.

This model accepts a three-phase input of 380–460 VAC, covering common low-voltage power supplies found in mechanical-room panels. Its output capacity is rated at 5.5 kW (7.5 HP), making it suitable for midsized fans and secondary-loop pumps. The Compact IP 20 enclosure is intended for installation inside a protective cabinet and permits cable entry from the top or bottom. Integrated electromagnetic compatibility suppression is provided by a Class A1 and B filter, which reduces conducted electrical emissions in mixed-voltage switchboards. The drive is supplied without an LCP, so operation and parameter adjustment require a remote keypad, standard control terminals, or an available network connection. Its standard terminal strip accepts the control signals needed to regulate connected HVAC equipment.

The internal hardware uses the Standard unit configuration, without extended conformal sealing or reinforced bus bars. The control board has no protective coating, so the drive should be installed in conditioned air when high humidity, corrosive vapor, or airborne contamination may be present. The fieldbus slot and application-option bay are fitted with blank plates because this configuration does not include those optional modules. Built-in control functions include preset acceleration ramps and PID control for fans, pumps, dampers, valves, and variable-air-volume boxes. These functions allow the motor speed to respond to pressure, temperature, flow, or other process signals received through the standard input and output terminals.