Description
The Honeywell RM7890A/B Relay Modules are microprocessor-based integrated burner controls for automatically fired, gas-only single burner on/off applications (if the Valve Proving feature is going to be used). The RM7890A/B System consists of a relay module, subbase, and amplifier. Options include the Keyboard Display Module (KDM) and remote display mounting. Functions provided by the RM7890 include automatic on/off burner sequencing, flame supervision, system status indication, system or self-diagnostics, and troubleshooting.