Product Description:

The 175Z7369 is an AC variable frequency drive released by Danfoss for the VLT 6000 HVAC Drives series. It serves as the speed-control element in air-handling units, pumps, and cooling towers where precise fan or impeller regulation is required to match thermal loads and reduce energy use. By modulating motor frequency rather than relying on dampers or valves, the drive can integrate into building management systems and support demand-based ventilation and chilled-water circulation.

The unit operates from 380–460 VAC three-phase mains and can deliver up to 30 kW / 40 HP at the motor terminals. A Compact NEMA 1 housing allows panel-mounted installation inside conditioned electrical rooms while providing finger-safe access to the wiring. The front face is fitted with an LCP that provides local start, stop, and parameter-entry functions without auxiliary interfaces. The line side is configured without a filter, so external radio-frequency interference suppression may be required where sensitive instruments share the power supply. The drive does not have additional application modules installed. Control connections remain available for the hard-wired signals used in standard HVAC installations.

The internal configuration uses the Graham application code, which provides a parameter set for variable-airflow routines commonly used in commercial HVAC equipment. The control boards have no protective coating, restricting the drive to clean, dry electrical enclosures that prevent exposure to condensation and corrosive airborne contaminants. The drive includes no fieldbus options, so speed commands and operating signals must use hard-wired analog, digital, or relay connections. Its standard unit configuration uses the baseline terminal arrangement and cooling components for the 30 kW frame size. Adequate ventilation around the enclosure is necessary to remove operating heat and maintain reliable performance under continuous load.