HONEYWELL EC7890A1011 burner control

CONTROL BOX HONEYWELL EC7890A1011

The Honeywell EC/RM7830, EC/RM7850 Relay Module is a microprocessor-based integrated burner control for automatically fired gas, oil, or combination fuel burner on/off (EC/RM7830A) or full modulation (EC/RM7850A) power burner applications. The EC/RM7830A or EC/RM7850A system consists of the relay module, wiring subbase, amplifier and purge card. Options include the keyboard display module (KDM), personal computer interface, Data ControlBus Module, and Combustion System Manager Software. The KDM can be mounted on the relay module or on the face of a panel door. The KDM can also be remotely mounted from the panel if this is approved for the application. The EC/RM7830, EC/RM7850 is programmed to provide a level of safety, functional capability and features beyond the capacity of conventional controls. The basic functions of the EC/RM7830A, EC/RM7850A includes automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics, and troubleshooting. FEATURES • Safety Features: — Interlock check. — Dynamic Ampli-Check. — Closed loop logic test. — Dynamic input check. — Dynamic safety relay test. — Dynamic self-check logic. — High Fire Purge Switch test (EC/RM7850A). — Expanded safe-start check. — Internal hardware status monitoring. — Low Fire Start Switch test (EC/RM7850A). — Tamper-resistant timing and logic. • Ignition attempts: 1 or 5. Selectable by model number. • Access for external electrical voltage checks. • Application flexibility. • Microcomputer technology allows dependable, long-term operation. • First-out annunciation and system diagnostics provided by a 2-row by 20-column vacuum fluorescent display (VFD) located on the KDM (optional). Text readout available in English, Spanish, Portuguese, French, German, Japanese (Katakana), Chinese, and Italian languages. • Five sequence information light emitting diodes (LEDs) with symbols for Power, Pilot, Flame, Main, and Alarm (see Fig. 1). • Five-function Run/Test Switch. • Interchangeable plug-in flame amplifiers. • Non volatile memory; EC/RM7830A, EC/RM7850A retain history files and sequencing status after the loss of power. • Remote reset (subject to application approval; optional). • Remote mounting of KDM (subject to application approval). • Burner control data available on the optional KDM: — Flame signal strength. — Hold status. — Lockout/alarm status. — Sequence status. — Sequence time.

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