175Z7269 by Danfoss

The 175Z7269 is an AC variable frequency drive produced by Danfoss for the VLT 6000 HVAC Drives series. Installed between the mains supply and a three-phase induction motor, it varies output frequency to control fan or pump speed in ventilation, heating, and cooling systems. By adjusting motor torque in real time, the drive helps reduce energy use and limits mechanical stress during starts and stops. The unit is commonly used where motors run for long periods and speed changes are needed to match building load without constant full-speed operation.

The drive accepts a line input of 200-240 VAC, so it can connect directly to common low-voltage distribution panels. Its continuous output rating of 1.1 kW (1.5 HP) supports small air-handling units and zone pumps that do not need high breakaway torque. A Compact NEMA 1 enclosure helps protect the unit in indoor installations while allowing convection cooling through top vents. Direct operator interaction is provided through an LCP, a detachable keypad with parameter menus, fault readout, and manual speed control. The unit is supplied without a filter, so installations that require additional conducted-emission suppression may need external RFI components.

From a configuration standpoint, the drive is supplied as a standard unit. Network connectivity is not included, and the unit comes without fieldbus options, so control is handled through hardwired commands and signals. The operating profile follows the Graham duty template used for this model, which sets the drive for HVAC fan and pump behavior. It is also supplied without application options, keeping the feature set limited to the standard configuration for this version. This arrangement suits standalone HVAC panels that rely on local control and conventional input wiring rather than networked communication.