Honeywell 7800 Series Product Data

GENERAL
The Honeywell RM7896 is a microprocessor based integrated
burner control for automatically fired gas, oil, or combination
fuel single burner applications. The RM7896 consists of the
Relay Module. Subbase, Amplifier and Purge Card 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 RM7896 is programmed to provide a level of safety,
functional capability and features beyond the capacity of
conventional controls.
Functions provided by the RM7896 include automatic burner
sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting.
FEATURES
• Safety features:
- Airflow switch check.
- Closed loop logic test.
- Dynamic Ampli-Check®.
- Dynamic input check.
- Dynamic safety relay test.
- Dynamic self-check logic.
- Internal hardware status monitoring.
- Tamper resistant timing and logic.
• Access for external electrical voltage checks.
• Airflow switch check feature (RM7896B,D).
• 15 second postpurge.
• Application flexibility.
• Communication interface capability.
• Delayed main valve (RM7896C,D).
• Dependable, long-term operation provided by
microcomputer technology.
• First-out annunciation and system diagnostics provided
by a 2 row by 20 column Vacuum Fluorescent Display
(VFD) located on the optional Keyboard Display Module
(optional).
Copyright © 1995 Honeywell Inc. • All Rights Reserved
RM7896A,B,C,D Relay Module
•
•
•
•
•
•
•
•
•
•
•
•
Specifications ...........................................................................
Ordering Information ................................................................
Principal Technical Features ....................................................
Safety Provisions .....................................................................
Installation ................................................................................
Wiring ....................................................................................... 11
Assembly ................................................................................. 14
Operation ................................................................................. 17
Checkout .................................................................................. 21
Troubleshooting ....................................................................... 27
7800 SERIES
First-out expanded annunciation with 26 Light Emitting
Diodes (LEDs) for limits and interlocks (optional).
Five (LEDs) for sequence information.
Two function Run/Test Switch (RM7896C,D).
Interchangeable plug-in flame amplifiers.
Local or remote annunciation of RM7896 operation and
fault information.
Nonvolatile memory; RM7896 retains history files and
sequencing status after loss of power.
Remote reset (optional).
Report generation (optional).
Selectable recycle or lockout on loss of airflow.
Selectable recycle or lockout on loss of flame.
Shutter drive output.
Burner controller data (optional):
- Expanded annunciator status.
- Flame signal strength.
- Hold status.
- Lockout/alarm status.
- 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 RM7896 and
optional Keyboard Display Module.
- Status of configuration jumpers.
- Status of Run/Test Switch (RM7896C,D).
PRODUCT DATA
Contents
2
2
7
8
9
65-0193