Which type of drawing is required alongside HVAC system prints for the installation of an HVAC control system?

The correct choice is plot plans for the installation of an HVAC control system alongside HVAC system prints. Plot plans provide essential information about the layout of the building site and where the HVAC systems will be positioned. They give a bird's eye view of the building's footprint, indicating critical elements such as property lines, existing structures, and any outdoor equipment locations. This context is vital for installers to understand how the HVAC systems will integrate into the larger environment, ensuring compliance with codes, zoning regulations, and physical constraints of the site.

Other drawing types could be relevant in different contexts. Detail drawings focus on specific components and their construction details, which might be more pertinent for intricate areas but do not provide the overall site layout. Electrical schematics might assist with electrical connections and operation but would not indicate external spatial arrangements. System layouts convey how equipment is arranged and connected but lack the broader site perspective provided by plot plans. Thus, plot plans are the most necessary to guide the overall installation process in relation to the physical site.