NEW opened box Honeywell RM7890B1030 Automatic Primary Control 7800 Series Burner Control Unit. With its precise burner control, it ensures efficient and effective operation of your unit. The unit is easy to install and use, and is compatible with a variety of HVAC and refrigeration systems.Featuring a durable and reliable design, this burner control unit is built to last and withstand the rigors of commercial use. It is ideal for use in industries such as HVAC and refrigeration, as well as in business and industrial settings. With its automatic primary control function, it ensures that your unit operates at the desired temperature and pressure, ensuring optimal performance and energy efficiency.