Honeywell 7800 Series Manual

RM7830A, RM7850A Relay Module

APPLICATION

The Honeywell RM7830A or RM7850A Relay Module is a
microprocessor based integrated burner control for automatically fired
gas, oil, or combination fuel single burner full modulation (RM7850A) or
on/off (RM7830A) power burner applications. The RM7830A or
RM7850A consists of a Relay Module. Subbase, Amplifier, and Purge
Card are required to complete the system. The Keyboard Display,
which is optional, can be mounted on the Relay Module or on the face
of a panel door. The Keyboard Display can also be mounted remotely
from the panel, provided this is approved for the application.
The 7800 SERIES is programmed to provide a level of safety,
functional capability and features beyond the capacity of conventional
controls.
Functions provided by the 7800 SERIES include automatic burner
sequencing, flame supervision, system status indication, system or
self-diagnostics and troubleshooting. Text readout for the Keyboard
Display Module is available in English, Spanish, Portugese, French,
German and Italian languages.

FEATURES

• 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 (RM7850A).
- Internal hardware status monitoring.
- Low Fire Start Switch test (RM7850A).
- Tamper resistant timing and logic.
® U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved
7800 SERIES
• First-out annunciation and system diagnostics provided by a
2 row by 20 column Vacuum Fluorescent Display (VFD)
located on the Keyboard Display Module. Text readout for this
unique Keyboard Display Module is available in English,
Spanish, Portugese, French, German and Italian languages.
• Access for external electrical voltage checks.
• Application flexibility.
• Dependable, long-term operation provided by microcomputer
technology.
• Five sequence information Light Emitting Diodes (LEDs)-
Power, Pilot, Flame, Main, Alarm (see Fig. 17).
• Five function Run/Test Switch.
• Interchangeable plug-in flame amplifiers.
• Nonvolatile memory for retaining history files and
sequencing status after loss of power.
• Remote mounting of the Keyboard Display Module (subject to
application approval).
• Remote reset (subject to application approval).
• Burner controller data available on the Keyboard Display
Module:
- Sequence status.
- Sequence time.
- Hold status.
- Lockout/alarm status.
- Flame signal strength.
- Total cycles of operation.
- Total hours of operation.
- Fault history of six most recent faults:
• Cycles of operation at time of fault.
• Fault message and code.
• Hours of operation at time of fault.
• Sequence status at time of fault.
• Sequence time at time of 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 Relay Module and
Keyboard Display Module.
• Status of configuration jumpers.
• Status of Run/Test Switch.
Application .......................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Ordering Information ........................................................... 2
Principle Technical Features ............................................... 7
Safety Provisions ................................................................ 8
Installation and Wiring ......................................................... 9
Operation ............................................................................ 20
Checkout ............................................................................. 28
Troubleshooting .................................................................. 29
X-XX UL
PRODUCT DATA
Contents
65-0222