Honeywell RM7800E, G, L, M Relay Modules
Microprocessor-based integrated burner control for automatically fired gas, oil, coal or combination fuel single burner applications. Provides safety, functional capability and features beyond conventional controls.
APPLICATION
The Honeywell RM7800 is a microprocessor based integrated
burner control for automatically fired gas, oil or combination
fuel single burner applications. The RM7800 system consists
of a Relay Module and Keyboard Display Module, Subbase,
Amplifier, and Purge Card. Options include Personal
Computer Interface, DATA CONTROLBUS MODULE™,
Remote Display Mounting, First-Out Expanded Annunciator
and Combustion System Manager¨ Software.
The RM7800 is programmed to provide a level of safety,
functional capability and features beyond the capacity of
conventional controls.
Functions provided by the RM7800 include automatic burner
sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting.
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.
— Internal hardware status monitoring.
— Low Fire Start Switch test.
— Tamper resistant timing and logic.
• Access for external electrical voltage checks.
• Application flexibility.
• Provides 0.8 to 3.0 second Flame Failure Response
Time (FFRT), depending on amplifier selected.
• Communication interface capability.
• Dependable, long-term operation provided by
microcomputer technology.
• First-out annunciation and system diagnostics
provided by 2 row by 20 column Vacuum Fluorescent
Display (VFD) located on the Keyboard Display
Module.
• First-out expanded annunciation with 26 Light Emitting
Diodes (LEDs) for limits and interlocks (optional).
• Five sequence information LEDs
• Five function Run/Test Switch.
• Interchangeable plug-in flame amplifiers.
• Local or remote annunciation of operation and fault
information (optional).
• Nonvolatile memory for retaining history files and
sequencing status after loss of power.
• Remote reset (optional).
• Report generation (optional).
• Burner controller data:
— Sequence status.
— Sequence time.
— Hold status.
— Lockout/alarm status.
— Flame signal strength.
— Expanded annunciator status.
— Total cycles of operation.
— Total hours of operation.
— Fault history of six most recent faults:
• Cycles of operation at time of fault.
• Expanded annunciator data 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 RM7800 and
Keyboard Display Module.
• Status of configuration jumpers.
• Status of Run/Test Switch.
SPECIFICATIONS
Electrical Ratings, see Table 1:
Voltage and Frequency: 120 Vac (+10/-15%),
50 or 60 Hz (+/- 10%)4.
Keyboard Display Module: 13 Vdc peak full wave rectified
(+20/-15%).
Power Dissipation:
RM7800: 10 Watts maximum.
Display Module: 3 Watts maximum.
Maximum Total Connected Load: 2000 VA.
Fusing: Total Connected Load: 20A maximum, type FRN
or equivalent.
Environmental Ratings:
Ambient Temperature:
Operating: -40°F to 140°F (-40°C to 60°C).
Storage: -40°F to 150°F (-40°C to 66°C).
Humidity: 85% RH continuous, noncondensing.
Vibration: 0.5G environment.
Weight:
RM7800: 1 pound 13 ounces, unpacked.
Keyboard Display Module: 4 ounces, unpacked.
Approval Bodies:
Underwriters Laboratories Inc. listed, File No. MP268,
Guide No. MCCZ.
Canadian Standards Association certified, LR9S329-3.
Factory Mutual approved, Report No. J.I.1V9A0.AF.
IRI acceptable.
Federal Communications Commission, Part 15,
Class B—Emissions.
Mounting: Q7800A for panel mount or Q7800B for wall
or burner mount.
Required Components:
Plug-in Flame Signal Amplifier, see Table 2.
ST7800A Plug-in Purge Timer Cards: selectable models:
two seconds to 30 minutes.
Q7800A or Q7800B Wiring Subbase.
