175Z7035 by Danfoss

The 175Z7035 is an AC variable-frequency drive built by Danfoss for the VLT 6000 HVAC Drives series. The unit regulates three-phase induction motors in heating, ventilation, and air conditioning installations, enabling precise speed control for fans, pumps, and compressors in building management systems. By matching motor speed to actual demand, it reduces energy use, eases startup loading, and supports local operation through its integrated control interface. This type of control helps maintain stable airflow or water circulation when load conditions shift during normal building operation.

It accepts a supply voltage of 380-460 VAC, allowing direct connection to standard low-voltage mains. The continuous output capability is 45 kW/60 HP, which suits large air handlers and chilled-water pumps. A compact IP 20 enclosure permits safe cabinet mounting while keeping the overall footprint manageable. To limit conducted emissions, the drive incorporates a Class A1 and Class B filter, supporting use in installations that require reduced electromagnetic interference. Setup and daily operation are handled through an LCP (Local Control Panel), which provides direct access to operating parameters and status information.

The dedicated HVAC profile supports control functions commonly used for variable airflow and pressure demands, including tuned ramps, PID behavior, and sleep operation. Internally, the electronics use a standard unit configuration that fits the basic series layout. The circuit boards are supplied with no protective coating, so the drive is better suited to dry indoor environments with limited airborne contamination. The factory configuration includes no communication options for fieldbus networking, which keeps the wiring focused on analog references or local panel control. In applications that rely on standalone drive control, this arrangement keeps the installation straightforward and avoids unused network hardware.