The Honeywell RM7890A2015 is a Microprocessor-based integrated burner control (120V, 50/60Hz) designed for single burner applications using gas, oil, coal, or combination fuel. It goes beyond standard controls, ensuring safety and advanced functionality. Use the RM/EC7800 2000 Series with subbases Q7800A2005/U, Q7800B2003/U, Q7800B2011/U.
Functions cover automatic burner sequencing, flame supervision, system diagnostics, and troubleshooting with external voltage checks. Enjoy application flexibility and communication interface capability.
Equipped with five LEDs for sequence data, a five-function Run/Test switch, and interchangeable plug-in flame amplifiers, it allows optional local or remote annunciation of RM7840 operation and faults. Nonvolatile memory retains history and lockout status after a power loss, compatible with existing Honeywell flame detectors. It also includes a dust cover and AirFlow switch check option.
- Flame Establishing Period – Pilot, 4 sec or 10 sec
- Flame Establishing Period – Main, 10 sec or 15 sec
- Early Spark Termination – Yes, 5 sec
- Required Components: Q7800A,B Universal Wiring Subbases, R7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal
- Amplifier, ST7800A Plug-in Purge Timer Card
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