Product Description:

The 175Z7056 is an AC variable frequency drive produced by Danfoss within the VLT 6000 HVAC Drives series. This standalone controller regulates the speed of three-phase induction motors used in air-handling units, pumps, and exhaust fans in building automation systems. Its variable-frequency output allows connected equipment to match fan or pump speed to actual demand rather than relying on dampers or throttling valves. This method can reduce unnecessary motor operation while providing precise airflow, pressure, or water-flow control. The drive can be installed near compatible HVAC equipment or incorporated into a broader building control system.

The drive delivers a continuous mechanical output of 18.5 kW or 25 HP, allowing it to operate motors within that power range under rated conditions. It accepts a mains supply of 380–460 VAC and connects directly to compatible three-phase utility power without requiring a transformer. The aluminum housing has a compact IP54 enclosure that protects internal components against limited dust ingress and water spray commonly found in mechanical rooms. Integrated electromagnetic compatibility suppression is provided by a Class A1 and B filter, which limits conducted electrical emissions on the incoming power system. A front-mounted local control panel (LCP) provides start and stop commands, status information, and access to operating parameters. The electronic assemblies have no protective coating, so the drive should be installed in a noncorrosive location that does not expose internal components to aggressive vapor or condensation.

The intended application is HVAC control, with operating functions suited to variable-torque loads such as centrifugal fans and pumps. Preconfigured fan and pump macros simplify parameter entry by grouping commonly used motor-control settings for these applications. The drive is a standard unit that uses the baseline configuration for this VLT platform. Its control architecture supports demand-based operation from local commands or compatible external control signals. When connected to sensors or a building controller, the unit can adjust motor speed in response to changing pressure, temperature, flow, or ventilation requirements. The empty communication slot also permits the later installation of a compatible network module when integration with a building automation network is required.