A P&ID (Piping and Instrumentation Diagram) is a schematic representation of a process system that shows the piping, equipment, and instrumentation used to control and monitor the system. In the context of a heating system, the P&ID might include isolation valves that are open in heating mode, which regulate the flow of hot water or steam through the system. The valves might be represented on the P&ID by symbols indicating their type, position, and control method. The diagram could also include other relevant equipment, such as pumps, heat exchangers, and temperature sensors. By including isolation valves that are open in heating mode on the P&ID, engineers, and technicians can easily identify the key components of the system and ensure that the system is operating correctly and safely. Use EdrawMax to create a similar diagram for your projects. EdrawMax offers a wide range of similar templates that helps beginners and professionals in creating great-looking diagrams.