Honeywell 7800 Series Manual

7800 SERIES RM7840E,G,L,M
The Honeywell RM7840 is a microprocessor
based integrated burner control for automatically
fired gas, oil, or combination fuel single burner ap-
plications. The RM7840 consists of a Relay Module.
Subbase, Amplifier and Purge Card are required to
complete the system. Options include Keyboard Dis-
play Module, Personal Computer Interface, DATA
CONTROLBUS MODULE
Mounting, First-Out Expanded Annunciator and
COMBUSTION SYSTEM MANAGER
The RM7840 is programmed to provide a level of
safety, functional capability and features beyond the
capacity of conventional controls.
Functions provided by the RM7840 include auto-
matic burner sequencing, flame supervision, system
status indication, system or self-diagnostics and
troubleshooting.
Safety features:
-Interlock check.
-Closed loop logic test.
-Dynamic AMPLI-CHECK™.
-Dynamic input check.
-Dynamic safety relay test.
-Dynamic self-check logic.
-Expanded safe-start check.
-High Fire Purge Switch test.
-Internal hardware status monitoring.
-Low Fire Start Switch test.
-Tamper resistant timing and logic.
Access for external electrical voltage checks.
Application flexibility.
Communication interface capability.
Dependable, long-term operation provided by microcom-
puter technology .
First-out annunciation and system diagnostics are pro-
vided by an optional 2 row by 20 column Vacuum Fluores-
cent Display (VFD) located on the Keyboard Display
Module (optional).
First-out expanded annunciation with 26 Light Emitting
Diodes (LEDs) for limits and interlocks (optional).
Five LEDs for sequence information.
Five function Run/Test Switch.
Interchangeable plug-in flame amplifiers.
Local or remote annunciation of RM7840 operation and
fault information.
Nonvolatile memory RM7840 retains history files and
sequencing status after loss of power.
Remote reset (optional).
Report generation (optional).
Burner controller data (optional):
-Expanded annunciator status.
-Flame signal strength.
-Hold status.
-Lockout/alarm status.
™ , Remote Display
™ software.
S. H. • Rev. 9-92 • ©Honeywell Inc. 1992 • Form Number 65-0087-2
Relay Module
-Sequence status.
-Sequence time.
-Total cycles of operation.
-Total hours of operation.
-Fault history, providing for 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.
• On/Off status of all digital inputs and outputs.
• Selected prepurge time.
• Software revision and version of RM7840 and
optional Keyboard Display Module.
• Status of configuration jumpers.
• Status of Run/Test Switch.
CONTENTS
Specifications ................................................ 2
Ordering Information .................................... 2
Principle Technical Features ........................ 7
Safety Provisions ........................................... 8
Installation .................................................... 9
Wiring .......................................................... 11
Assembly ...................................................... 15
Operation .................................................... 18
Static Checkout ............................................ 22
Checkout ...................................................... 24
Troubleshooting .......................................... 32