FEATURES

 Safety features:

 Access for external electrical voltage checks. 

Dynamic airflow switch check feature (RM7895F). 

Application flexibility. 

 Dependable, long-term operation provided by  microcomputer technology. 

Five Light Emitting Diodes (LEDs) for sequence  information, see Fig. 1.

Interchangeable plug-in flame amplifiers. 

Nonvolatile memory; retains history files and  sequencing status after loss of power. 

Selectable recycle or lockout on loss of airflow  (RM7895E,F). 

Selectable recycle or lockout on loss of flame.

OPTIONAL FEATURES 

 Communication interface capability. ï First-out annunciation and system diagnostics are  provided by a 2 row by 20 column Vacuum Fluorescent  Display (VFD) located on the optional KDM. 

First-out expanded annunciation with 26 LEDs for  limits and interlocks. 

Local or remote annunciation of RM7890D, RM7895E,F  operation and fault information. 

Report generation. 

 Remote reset. 

 Burner controller data using S7800 Keyboard Display: 

Expanded annunciator status. 

Flame signal strength.

APPLICATION The Honeywell RM7890D, RM7895E,F is a microprocessor  based integrated burner control for automatically fired gas, oil,  or combination fuel single burner Infrared Heater applications.  The RM7890D, RM7895E,F System consists of the Relay  Module, Wiring Subbase and Amplifier. A Purge Card is  required for the RM7895E,F to complete the system. Options  include Keyboard Display Module (KDM), Personal Computer  Interface, DATA CONTROLBUSô MODULE, Remote Display  Module, First-Out Expanded Annunciator and COMBUSTION  SYSTEM MANAGERô Software. The Relay Module is programmed to provide a level of safety,  functional capability and features beyond the capacity of  conventional controls. Functions provided by the RM7890D, RM7895E,F include  automatic burner sequencing, flame supervision, system  status indication, system or self-diagnostics and  troubleshooting. Higher impressed flame rod voltage makes the RM7090D,  RM7895E,F suitable for infrared heaters and some unstable/ hard to sense flame rod applications.