Honeywell 7800 SERIES EC7895A Product Data

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PRODUCT DATA
Copyright © 1996 Honeywell Inc. • All Rights Reserved
X-XX UL
7800 SERIES EC7895A, RM7895A
Relay Module
GENERAL
The Yamatake Honeywell EC7895A and RM7895 is a microprocessor
based integrated burner control for automatically fired gas, oil, or
combination fuel single burner applications. The RM7895 consists of
the Relay Module. Subbase, Amplifier and Purge Card. Options
include Keyboard Display Module, Personal Computer Interface,
DATA CONTROLBUS MODULE™, Remote Display Module, and
COMBUSTION SYSTEM MANAGER™ Software.
The EC7895 and RM7895 are programmed to provide a level of
safety, functional capability and features beyond the capacity of
conventional controls.
Functions provided by the EC7895 and RM7895 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.
Application flexibility.
Communication interface capability.
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.
Five (LEDs) for sequence information.
Interchangeable plug-in flame amplifiers.
Local or remote annunciation of EC7895 and RM7895
operation and fault information.
Nonvolatile memory; EC7895 and RM7895 retain 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):
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.
•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 EC7895 and RM7895
and optional Keyboard Display Module.
Status of configuration jumpers.
Contents
General ......................................................................................... 1
Features ........................................................................................ 1
Specifications ................................................................................ 2
Ordering Information ..................................................................... 2
Principal Technical Features ......................................................... 8
Safety Provisions .......................................................................... 8
Installation ..................................................................................... 9
Wiring ............................................................................................ 11
Assembly ...................................................................................... 14
Operation ...................................................................................... 17
Checkout ....................................................................................... 20
Troubleshooting ............................................................................ 26
65-0205