What types of HVAC control diagrams are commonly used?

There are several types of HVAC control diagrams, including ladder diagrams, wiring diagrams, pneumatic diagrams, and electronic diagrams. Ladder diagrams are used to represent electrical circuits, while wiring diagrams show the physical connections between components. Pneumatic diagrams illustrate pneumatic control systems, and electronic diagrams represent electronic control systems. Each type of diagram serves a specific purpose and is used in different contexts.