AMIKON Industrial Supply / Honeywell Honeywell EC7850A1072 Relay Module A 7800 Series microprocessor-based burner control relay module for automatic gas, oil or combination-fuel single-burner applications using full modulation. Its control functions include burner sequencing, flame supervision, operating-status indication and diagnostics. Manufacturer-listed product: Discontinued Technical Specifications Model EC7850A1072 Product series 7800 Series Product type Microprocessor