Honeywell RM7890B1014/U Burner Control Relay

Overview

The Honeywell RM7890B1014/U is a microprocessor-based burner control relay. It belongs to the 7800 Series and controls automatically fired single burner systems. It supports gas, oil, coal, or combination fuels. The module provides flame supervision, automatic sequencing, and system diagnostics. These features improve safety and operational reliability. It suits industrial combustion systems with intermittent pilot ignition and shutter drive functions.

Technical Specifications

• Model Number: RM7890B1014/U

• Series: 7800 Series

• Application: On-Off primary control for single burner systems

• Input Voltage: 120 VAC (+10%, –15%), 50/60 Hz

• Power Consumption: Max 10 W

• Flame Establishing Period: Selectable 4 or 10 seconds (intermittent pilot)

• Output Contacts: 2 SPDT relays

• Compatible Flame Amplifiers: R7847, R7848, R7849, R7851, R7861, R7886

• Mounting Base Required: Q7800A or Q7800B universal wiring subbase

• Indicators: 5 LEDs for sequence status

• Memory: Nonvolatile; retains history after power loss

• Optional Features: Remote reset, report generation, relight or lockout on flame loss

• Communication Options: PC interface, Data ControlBus Module, remote display

• Operating Temperature: -40°C to +60°C (-40°F to +140°F)

• Storage Temperature: -40°C to +66°C (-40°F to +150°F)

• Humidity Range: Up to 85% RH, non-condensing

• Vibration Resistance: 0.5 G

• Weight: 0.8 kg