1 65-0106—2
7800 SERIES RM7823A
Relay Module
■ Safety features:
— Closed loop logic test.
— Dynamic AMPLI-CHECK™.
— Dynamic input check.
— Dynamic self-check logic.
— Expanded safe-start check.
— Internal hardware status monitoring.
— Tamper resistant logic.
■ Access for external electrical voltage checks.
■ Application flexibility with interchangeable plug-in
flame amplifiers.
■ Communication interface capability.
■ Dependable, long-term operation provided by microcom-
puter technology.
■ System and device diagnostics are provided by an optional
2 row by 20 column Vacuum Fluorescent Display (VFD)
located on the optional Keyboard Display Module.
■ First-out expanded annunciation with 26 Light Emitting
Diodes (LEDs) for limits and interlocks (optional).
■ Three (LEDs) for status information.
■ Local or remote annunciation of RM7823A operation and
fault information (optional).
■ Nonvolatile memory; RM7823A retains history files and
sequencing status after loss of power.
■ Remote reset (optional).
■ Report generation (optional).
■ Shutter drive output.
■ Burner controller data (optional):
— Expanded annunciator status.
— Flame signal strength.
— Hold status.
— Sequence status.
— Sequence time.
— Total hours of operation.
— Total cycles of operation.
— Fault history providing the six most recent faults:
• Cycles of operation at the time of the fault.
• Expanded annunciator data 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.
• Manufacturing code.
• Software revision and version of RM7823A and
optional Keyboard Display Module.
The Honeywell RM7823A is a microprocessor based
Flame Detector Relay that can be fitted with any 7800
SERIES Amplifier to provide relay action from one Spdt
relay when flame is present or not present. The RM7823A
Relay Module, Q7800 Wiring Subbase and Amplifier are
required to complete the system. Options include Keyboard
Display Module, Personal Computer Interface, DATA
CONTROLBUS MODULE™, Remote Display Module,
First-Out Expanded Annunciator and COMBUSTION
SYSTEM MANAGER™ Software.
The RM7823A is programmed to provide a level of
safety, functional capability and features beyond the capac-
ity of conventional controls.
Functions provided by the RM7823A include flame super-
vision, system status indication, system or self-diagnostics
and troubleshooting.
The RM7823A is a flame detector relay only. Suitable
primary control must be used to provide safe-start check,
safety lockout, load switching and other required functions in
flame safeguard systems.
65-0106-2
G.R. • Rev. 3-94 • ©Honeywell Inc. 1994 • Form Number 65-0106—2
CONTENTS
Specifications .................................................2
Ordering Information ..................................... 2
Principle Technical Features .......................... 7
Safety Provisions ............................................ 8
Installation ..................................................... 9
Wiring .......................................................... 10
Assembly ...................................................... 12
Operation ..................................................... 14
Checkout ...................................................... 15
Troubleshooting ........................................... 19
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