Honeywell Burner Control Series RM7800 AXXXX
SPECIFICATIONS
Electrical Ratings (see Tables 1 through 4):
Voltage and Frequency:
EC7830/EC7850: 220 to 240 Vac (+10%/-15%),
50/60 Hz (±10%).
RM7830/RM7850: 120 Vac (+10%/-15%),
50/60 Hz (±10%).
Keyboard Display Module (optional): 13 Vdc peak fullwave
rectified (+20%/-15%).
Power Dissipation:
Relay Module: 10W maximum.
KDM: 3W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing (Total Connected Load): 15A, type SC or equivalent.
APPLICATION
The Honeywell RM7800/RM7840 Relay Modules are
microprocessor-based integrated burner controls for
automatically fired gas, oil, or combination fuel single burner
applications. The RM7800/RM7840 Relay Modules are used
for UL/CSA On/Off, UL/CSA Modulating, and FM/IRI
Modulating burner applications. The RM7800/RM7840 system
consists of a Relay Module. Keyboard Display Modules
(standard with RM7800), Dust Cover (standard with RM7840),
Subbase, Amplifier, and Purge Card. Options include DATA
CONTROLBUS MODULE™, Remote Display Mounting, FirstOut Expanded Annunciator and Communications through
Modbus™.
Functions provided by the RM7800/RM7840 include
automatic burner sequencing, flame supervision, system
status indication, system or self-diagnostics and
troubleshooting. The RM7800/RM7840 is a solid state
replacement for the electromechanical R4140 Automatic
Programming Control.
• Safety Features:
— Interlock check.
— Dynamic Ampli-Check™.
— Closed loop logic test.
— Dynamic input check.
— Dynamic safety relay test.
— Dynamic self-check logic.
— High Fire Purge Switch test (EC/RM7850A).
— Expanded safe-start check.
— Internal hardware status monitoring.
— Low Fire Start Switch test (EC/RM7850A).
— Tamper-resistant timing and logic.
• Ignition attempts: 1 or 5. Selectable by model number.
• Access for external electrical voltage checks.
• Application flexibility.
• Microcomputer technology allows dependable,
long-term operation.
• First-out annunciation and system diagnostics
provided by a 2-row by 20-column vacuum fluorescent
display (VFD) located on the KDM (optional). Text
readout available in English, Spanish, Portuguese,
French, German, Japanese (Katakana), Chinese, and
Italian languages.
• Five sequence information light emitting diodes
(LEDs) with symbols for Power, Pilot, Flame, Main, and
Alarm (see Fig. 1).
• Five-function Run/Test Switch.
• Interchangeable plug-in flame amplifiers.
• Non volatile memory; EC/RM7830A, EC/RM7850A
retain history files and sequencing status after the loss
of power.
• Remote reset (subject to application approval;
optional).
• Remote mounting of KDM (subject to application
approval).
• Burner control data available on the optional KDM:
— Flame signal strength.
— Hold status.
— Lockout/alarm status.
— Sequence status.
— Sequence time.
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