BACnet PIU for TRANE BCU and Satchwell BAS Integration Manual

This document describes the BACnet PIU, a hardware and software interface that allows a Satchwell BAS (Building Automation System) to monitor and control TRANE BCU chillers and building control units via ARCNET and BACnet protocol. It details features such as point mapping, alarm reporting, and logging, while noting that the PIU cannot be used for initial chiller setup or reconfiguration.