Honeywell RM7800L1012 Programmable Control 120 V Burner Control with airflow switch check option, for Automatic Single Burner Systems. Replaces the BC7000/PM720L series of Honeywell products. Please order the Base Amplifier, Wiring Subbase & Purge Timer Separately. Includes Keyboard Display Module S7800A1001 / S7800A1142. Overview: Microprocessor-based integrated burner control for automatically fired gas, oil, coal or combination fuel single burner applications. Provides safety, functional capability and features beyond conventional controls. Features: Functions include automatic burner sequencing, flame supervision, system status indication, system