Description
Honeywell EC7890B1010
Technical Specifications
- Compatible detectors: UV and IR flame detectors
- Supply voltage: 120 V AC 50/60 Hz
- Display: 4-digit backlit LCD
- Keypad: 6-button local programming keypad
- Analog outputs: Two 4–20 mA modulation outputs
- Event log: 50 stored burner events
- Mounting: DIN rail mount
Functional Features Onboard keypad and display, full configuration without external programming tools. Real-time flame signal trend graph on the display, supports combustion tuning. 50-event non-volatile log records burner starts, stops and lockouts. Parallel air/fuel modulation outputs. Flame signal threshold adjustable on-site. Lockout reset button integrated on the front panel.
Application Scenarios Industrial boilers requiring frequent on-site burner tuning Process heaters with variable fuel quality Burner management systems requiring detailed event history Spare part replacement for EC7890 controls with display failure
Performance Parameters
- Flame signal trend resolution: 1 second sampling
- Event log retention: 10 years without power
- Display refresh rate: 1 second
- Operating temperature: -10 °C to +60 °C
- Analog output load: ≤600 Ω
Material Composition ABS flame retardant front bezel Backlit LCD display Tactile rubber keypad Event log non-volatile memory Screw terminal blocks Steel mounting bracket
Structural Features Rectangular enclosure with larger front panel. Front face houses LCD display, navigation keypad and reset button. Rear terminals grouped by power, detector, outputs and communication. Removable terminal blocks reduce field wiring time. DIN rail mounting clips.
Working Principle The control executes the standard burner management sequence while continuously measuring flame detector signal strength. The keypad and display let operators view live flame trends, adjust modulation ratios and review logged events. During run state, analog outputs drive air and fuel valves in parallel. All burner operational events are recorded to the on-board event log with timestamps. Lockout events trigger immediate fuel valve shutdown and require manual reset.
Installation Requirements Mount the control on the cabinet DIN rail. Connect all field wiring to labeled terminals. Power up, set basic burner parameters via the local keypad. Run a full sequence test, verify all functions operate as configured.
Usage Notes Never expose the display to direct sunlight, UV exposure clouds the LCD window. Keypad lockout prevents unauthorized parameter changes during normal operation. Event log memory fills after long operation; export old data during annual service. Do not press keys with sharp objects, this damages the rubber keypad membrane.
