Honeywell RM7840G1022 Burner Control 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. With Valve Proving Feature. RM7800L comes standard with S7800A1142 Keyboard Display. Features: Functions include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and trouble shooting. Access for external electrical voltage checks. Application flexibility and communication interface capability. Five LEDs provide sequence information. Power LED blinks fault code