Settings And Adjustments - Honeywell 7800 SERIES Installation Instructions Manual

Keyboard Display Module (KDM)
The Keyboard Display Module (see Fig. 3) is provided with
the RM7838A Relay Module. The first line of the Vacuum
Fluorescent Display (VFD) provides:
1. Current status of the burner sequence (STANDBY,
PURGE, PILOT IGN, MAIN IGN and RUN).
2. Timing information (PURGE, PILOT IGN, and MAIN
IGN) in minutes and seconds.
3. Hold information (PURGE HOLD:T19).
4. Lockout information (Lockout, Fault Code, Message and
Sequence).
The extreme right side of the first line is either blank or shows
a small arrow pointing to the second line followed by a two-
letter code (DI, Diagnostic Information; Hn, Fault History
Information; EA, Expanded Annunciator). When the arrow and
two-letter codes are displayed, it indicates the second line is
showing a selectable message submenu. The second line
displays selectable or pre-emptive messages.
A selectable message supplies information for flame strength,
system status indication, system or self-diagnostics and
troubleshooting.
A pre-emptive message has parentheses around the
message and supplies a detailed message to support the
sequence status information. A pre-emptive message can
also be a lockout message. A pre-emptive message replaces
a selectable message to support the sequence status
information. It also replaces a selectable message after
60 seconds or if a lockout message is available.

SETTINGS AND ADJUSTMENTS

Selectable Sit-Configurable Jumpers
The RM7838A has one site-configurable jumper option, see
Fig. 4 and Table 6. If necessary, the site configurable jumper
should be clipped with side cutters and the resistor removed
from the relay module.
RM7838A 7800 SERIES RELAY MODULES
SELECTABLE CONFIGURATION JUMPER
Fig. 4. Selectable site-configurable jumper.
Table 6. Site-Configurable Jumper Options.
Jumper
Number Description
JR1 Pilot Flame Establishing
Period (PFEP)
SERVICE NOTE: Clipping and removing a site-cofigurable-
jumper enhances the level of safetyand
removing a site-configurable-jumper after
200 hours of operation causes a non-
resettable fault 110.
11
M11502
Intact Clipped
10 4
seconds seconds
66-1087—2