Features
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.
Specifications
Application Programming Control
Flame Establishing Period – Pilot 4 sec or 10 sec
Flame Establishing Period – Main 10 sec or Intermittent
Interlocks Running
Preignition Yes
PrePurge Determined by ST7800A Purge Timer Card
PostPurge 15 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.
Voltage 120 Vac (+10, -15%)
Frequency 50 Hz
Frequency 60 Hz (±10%)
AirFlow Check User selectable
Second Stage Pilot Valve Intermittent
Pilot Type interrupted
Vibration 0.5 G environment
Early Spark Termination Yes, 5 sec
Ambient Temperature Range (F) -40 F to +140 F
Ambient Temperature Range (C) -40 C to +60 C
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
Weight (lb) 1 lb 13 oz