Tracer ZN517 is a field-installed, application-specific controller that provides direct-digital zone temperature control. The controller can operate as a stand-alone device or as part of a building automation system (BAS). ZN517 is designed to control the following types of equipment: 2-heat/2-cool rooftop with optional economizer control; 4-cool rooftop with optional economizer control; 2-stage heat pump with optional economizer and auxiliary heat control; Split system. The Tracer ZN517 follows the guidelines of the Space Comfort Controller (SCC) profile.