Which best describes the purpose of outdoor and return air dampers in an economizer control system?

The purpose of outdoor and return air dampers in an economizer control system is primarily to maintain the proper mixed air temperature for economical operation. In an economizer system, these dampers work together to regulate the intake of outside air and the recirculation of return air, allowing for optimal mixing based on the surrounding conditions. This mixture is crucial because it helps manage energy consumption and promotes efficiency by utilizing cooler outside air for ventilation when appropriate, reducing the need for mechanical cooling.

By controlling the temperature of the mixed air, the system can take advantage of favorable weather conditions to maintain comfort levels within the building, ultimately leading to reduced energy usage and operational costs. This operational strategy is essential to achieving the economic benefits associated with an economizer control system.