Yaskawa AC Drive Static Duct Pressure Control Application Guide

This document describes how Yaskawa AC drives use a built-in PID algorithm to regulate static duct pressure in HVAC systems by adjusting fan speed based on feedback from a differential pressure transducer. It explains the closed-loop control process, transducer placement (about 2/3 down the duct), and wiring configurations for maintaining setpoint while reducing energy consumption compared to constant air volume systems.