Honeywell upgrade replacement programming control r7140l1009, use for r4140l features the honeywell r7140g, l, m burner control modules are microprocessor-based integrated burner control for automatically fired gas, oil or combination fuel single burner applications functions provided by the r7140g,l,m include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting upgrade replacement for bc7000 or r4140 legacy programmer controls