Microprocessor-based integrated burner control for automatically fired gas, oil, coal or combination fuel single burner applications. Provides safety, functional
capability and features beyond conventional controls.
Functions include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting.
Access for external electrical voltage checks.
Application flexibility and communication interface capability.
Five LEDs provide sequence information.
Five function Run/Test Switch.
Interchangeable plug-in flame amplifiers.
Local or remote annunciation of RM7840 operation and fault information.
Nonvolatile memory retains history files and lockout status after loss of power.
Compatible with existing Honeywell flame detectors.
Dimensions (in.):5 in. wide x 5 in. high x 5 1/4 in. deep with Q7800A Subbase x 6 3/32 in. deep with Q7800B Subbase
Dimensions (mm):127 mm wide x 127 mm high x 133 mm deep with Q7800A Subbase x 155 mm deep with Q7800B Subbase
Frequency:50 Hz; 60 Hz (±10%)
Approvals, Underwriters Laboratories Inc.:Component Recognized, File No. MP268; Guide No. MCCZ.
Approvals, CSA:Certified, File No. LR95329-3.
Voltage:120 Vac (+10, -15%)
Shipping and Storage Temperature Range (F):-40 F to +140 F
Shipping and Storage Temperature Range (C):-40 C to +60 C
Approvals, Federal Communications Commission:FCC Part 15, Class B, Emissions.
Flame Establishing Period – Pilot:4 sec or 10 sec
Flame Establishing Period – Main:10 sec, or 15 sec, or 30 sec, or Intermittent
PrePurge:Determined by ST7800A Purge Timer Card
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.
AirFlow Check:User selectable
Second Stage Pilot Valve:selectable
Vibration:0.5 G environment
Approvals, Control Safety Devices:Acceptable: CSD-1
Approvals, Swiss RE:Acceptable
Approvals, Factory Mutual: Report No. OX4A5.AF.
Shipping Weight: 2 kg