Mitsubishi City Multi PIU (Mk 2) Protocol Interface Unit Manual

This document describes the Mitsubishi City Multi PIU (Mk 2), a hardware interface that integrates Mitsubishi air conditioning units with a Satchwell Building Automation System (BAS). It details how the PIU maps standard BAS points to Mitsubishi system parameters, enabling monitoring and limited control via a BAS terminal, along with specifications, supported components, and typical system architecture.