The Honeywell RM7838A is a microprocessor-based
integrated burner control for semi-automatically fired gas, oil,
or combination fuel single burner applications. The RM7838A
Relay Module is intended to replace the Industrial
R4138A,B,C and D Flame Safeguard Primary Control, but
does not include an override on momentary power
interruptions. The RM7838A System consists of a relay
module, 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
Functions provided by the RM7838A include semi-automatic
burner sequencing, flame supervision, system status
indication, system or self-diagnosis and troubleshooting.
This document provides installation and static checkout
instructions. Other applicable publications are:
63-2278 Q7700 Network Interface Unit Product Data.
65-0084 Q7800A,B 22-Terminal Wiring Subbase Product
65-0089 ST7800A Plug-in Purge Timer Installation
65-0090 S7800A Keyboard Display Module Product Data.
65-0091 S7810A Data ControlBus Module™ Product
65-0101 S7830 Expanded Annunciator Product Data.
65-0109 R7824, R7847, R7848, R7849, R7861, R7886
Flame Amplifiers for the 7800 SERIES Product Data.
65-0131 221818A Extension Cable Assembly
65-0229 7800 SERIES Relay Modules Checkout and
Electrical Ratings, see Table 3:
Voltage and Frequency: 120 Vac (+10/-15%), 50/60 Hz
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 20A maximum, type FRN
® U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • All Rights Reserved
7800 SERIES Relay Modules
Operating: -40°F to 140°F (-40°C to 60°C).
Storage: -40°F to 150°F (-40°C to 66°C).
Humidity: 85% relative humidity continuous,
Vibration: 0.5G environment.
Underwriters Laboratories Inc. Listed: File No. MP268,
Canadian Standards Association Certified: LR9S329-3.
Factory Mutual Approved: Report No. J.I.1V9AO.AF.
Industrial Risk Insurers: Acceptable.
Federal Communications Commission: Part 15, Class B,
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
2. Check the ratings given in the instructions and marked
on the product to make sure the product is suitable for
3. Installer must be a trained, experienced, flame
4. After installation is complete, check out the product
operation as provided in these instructions.
Fire or Explosion Hazard.
Can cause property damage, severe injury,
Verify safety requirements each time a control is
installed on a burner.
Electrical Shock Hazard.
Can cause electrical shock or equipment/
Disconnect the power supply before beginning