Compression chiller system with integrated process and control diagram showing high-side and low-side refrigeration loops, sensor instrumentation, and PLC-based feedback control. Refrigerant flows from the Compressor through Oil Separator, Condenser, Receiver, Electronic Expansion Valve, and Evaporator in a closed cycle, while chilled water circulates through the Evaporator to serve AHU and building loads. Pressure and temperature sensors on both refrigerant and water sides feed into the Chiller Controller, which uses PID control to modulate the EEV Actuator Signal and maintain setpoint chilled water supply temperature. This architecture demonstrates best-practice sensor placement, control loop design, and separation of high-pressure and low-pressure zones for safe, efficient chiller operation. Fork and customize this diagram on Diagrams.so to document your facility's chiller configuration, add equipment-specific parameters, or integrate with building automation system documentation.