Honeywell 7800 Series Manual

The Honeywell RM7885 is a microprocessor based inte-
grated burner control for semi-automatically fired gas, oil or
combination fuel single burner industrial applications. The
RM7885 requires a Relay Module Subbase and Amplifier to
complete the system. Options include Keyboard Display Mod-
ule, Personal Computer Interface, DATA CONTROLBUS
MODULE™, Remote Display Module, First-Out Expanded
Annunciator and COMBUSTION SYSTEM MANAGER™ Soft-
ware.
The RM7885 is programmed to provide a level of safety,
functional capability and features beyond the capacity of con-
ventional controls.
The RM7885 is adaptable to continuous firing, high-low or
modulating firing rate for semi-automatic burner sequencing.
Functions provided by the RM7885 include flame supervision,
system status indication, system or self-diagnostics and trouble-
shooting.
The RM7885 will operate with any of the following types of
ignitions:
1. Torch-ignited main burner using the S445A Start-Stop
Station, or any conventional knee or foot operated start-stop
station.
2. Torch-ignited pilot using the S445A Start-Stop Station, or
any conventional knee or foot operated start-stop station.
3. Direct-ignition oil burner or electrically ignited pilot,
using the S445A Start-Stop Station, which maintains electric
ignition as long as the Start Switch is depressed (up to 15
minutes).
Safety features:
- Closed loop logic test.
- Dynamic AMPLI-CHECK™.
- Dynamic input check.
- Dynamic safety relay test.
- Dynamic self-check logic.
- Expanded safe-start check.
- Internal hardware status monitoring.
- Tamper resistant timing and logic.
Lockout if Start Switch is held 15 minutes.
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
Fluorescent Display (VFD) located on the optional Key-
board Display Module.
First-out expanded annunciation with 26 Light Emitting
Diodes (LEDs) for limits and interlocks (optional).
Five LEDs for sequence information.
Interchangeable plug-in flame amplifiers.
Local or remote annunciation of RM7885A operation and
fault information (optional).
Nonvolatile memory; RM7885A 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.
- Lockout/alarm status.
7800 SERIES
Relay Module
- 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.
• On/off status of all digital inputs and outputs.
• Software revision and release of RM7885A and
optional Keyboard Display Module.
CONTENTS
Specifications ................................................ 2
Ordering Information .................................... 2
Principle Technical Features ........................ 7
Safety Provisions ........................................... 8
Installation .................................................... 9
Wiring .......................................................... 11
Assembly ...................................................... 16
Operation .................................................... 19
Checkout ...................................................... 21
Troubleshooting .......................................... 29
L.Z. • 6-92 • © Honeywell Inc. 1992 • Form Number 65-0107
RM7885A