TAC Xenta 104-A Zone Controller Manual

This document describes the TAC Xenta 104-A, a LonMark-compliant zone controller for roof top units, small AHUs, and unit ventilators, featuring sequenced control of heating, cooling, and economizer dampers. It details technical specifications, inputs/outputs, application programs, and control functions such as cascade control, economizer operation, and staged or tri-state heating.