GENERAL

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 www.abb-drive.com 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.

— Total cycles of operation.

— Total hours of operation.

— Fault history providing the six most recent faults:

• Cycles of operation at the time of the fault.

• Fault message and code.

• Hours of operation at the time of the fault.

• Sequence status at the time of the fault.

• Sequence time at the time of the fault.

— Diagnostic information:

• Device type.

• Flame amplifier type.

• Flame failure response time (FFRT).

• Manufacturing code.

• On/off status of all digital inputs and outputs.

• Selected prepurge time.

• Software revision and version of relay module and optional KDM.

• Status of configuration jumper.

• Status of Run/Test Switch.