7800 Series RM7824A Relay Module Pages 01-03. CSI 3-Part Specifications.

GENERAL

The Honeywell RM7824A Relay Module is a 24 Vdc microprocessor-based integrated burner control for automatically fired gas, oil or combination fuel single burner applications. The RM7824A consists of the Relay Module, Subbase and Amplifier are required to complete the system.  Options include Keyboard Display Module, Personal Computer Interface, DATA CONTROL BUS MODULE � , Remote Display Module and COMBUSTION SYSTEM MANAGER � Software.

The RM7824A is programmed to provide a level of safety, functional capability and features beyond the capacity of conventional controls.

Functions provided by the RM7824A include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting.

FEATURES

• Safety features:
   

  Closed loop logic test. Dynamic input check. Dynamic safety relay check. Dynamic self-check logic. Expanded safe-start check. Internal hardware status monitoring. Tamper resistant timing and logic.

• Access for external electrical voltage checks.
• Application flexibility.
• Communications interface capability.
• Dependable, long-term operation provided by microcomputer technology.
• First-out annunciation and system diagnostics are provided by a 2-row by 20-column Vacuum Fluorescent Display (VFD) located on the optional Keyboard Display Module.
• Five light emitting diodes (LEDs) for sequence information.
• Flame signal strength.
• Local or remote annunciation of RM7824A operation and fault information (optional).
• Nonvolatile memory; RM7824A retains history files and sequencing status after loss of power.
• Plug-in flame amplifier.
• Remote reset (optional).
• Report generation (optional).
• Shutter drive output.
• Burner controller data (optional):
   

  Hold status. Lockout/alarm status. Sequence status. Sequence time. Total cycles of operation. Total hours of operation. Fault history providing 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. Software revision and version of RM7824A and optional Keyboard Display Module. Status of configuration jumper.

SPECIFICATIONS

Model:
RM7824A Relay Module for the 7800 SERIES.

Electrical Ratings (See Table 1):
Voltage: 24 Vdc (22-28 Vdc).
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 500 VA.
Fusing: Total Connected Load: 20A maximum, type FRN or equivalent.

Environmental Ratings:
Ambient Temperature:
Operating: -40°F to +140°F (-40°C to +50°C).
Storage: -60°F to +150°F (-49°C to +66°C).
Humidity: 85% relative humidity, non-condensing.
Vibration: 0.5G environment.

Dimensions:
See Fig. 1 through 4.

ORDERING INFORMATION

When purchasing replacement and modernization products from your 7800 SERIES distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1. Your local Honeywell Home and Building Control Sales Office (check white pages of phone directory).
2. Home and Building Control Customer Logistics:  Honeywell Inc., 1885 Douglas Drive North, Minneapolis, Minnesota 55422-4386,  (612) 951-1000

In Canada�Honeywell Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

Weight:
RM7824A with Dust Cover: 1 pound, 12 ounces, unpacked.

IMPORTANT Flame Detection System available for use with RM7824A. To select your Plug-in Flame Signal Amplifier and applicable Flame Detector, see Table 2 and Fig. 3.

CAUTION
To prevent the control from sequencing on power up, RM7824 Relay Modules with software revision 2424 or less should not be used with R7848 Infrared Amplifiers and C7015 Infrared Flame Detectors, unless a ten-second delay is provided.

^a Circuitry tests all electronic components in the flame detection system (amplifier and detector) 12 times a minute during burner operation and shuts down the burner if the detection system fails.

Approval Bodies:
Underwriters Laboratories Inc. Component Recognized:
File no. MP268, guide no. MCCZ.
Canadian Standards Association certified: LR9S329-3.
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 Fig. 2.
Q7800A or Q7800B.

REMOVE ONLY FOR TERMINAL TEST ACCESS.

Fig. 1. Mounting dimensions of RM7824A Relay Module and Q7800A Subbase in in. (mm).