Honeywell 7800 Series Manual page 18

7800 SERIES RM7830A, RM7850A RELAY MODULE
During RUN, the Run/Test Switch, when placed in the
TEST position, drives the firing rate motor to the Low
Fire position.
Fig. 13. Flame signal amplifier mounting.
NOTE: When the Relay Module is switched to the TEST
mode, it stops and holds at the next Run/Test Switch
point in the operating sequence. Make sure that the
RUN/TEST SWITCH is in the RUN position before
leaving the installation.
65-0222
Selectable Site-Configurable Jumpers
The RM7830A or RM7850A has three site-configurable jumper
options, see Figure 15 and Table 4. The site-configurable
jumpers should be clipped with side cutters and the resistors
removed from the Relay Module. The RM7830A or RM7850A
reads the settings of these configuration jumpers at startup.
After 200 hours of Main Valve operation, the RM7830A or
RM7850A locks the configuration jumper settings into its
internal memory. If these jumpers are altered after the lock in
occurs, the RM7830A or RM7850A will lockout. This safety
function of the RM7830A or RM7850A helps assure that it
cannot be modified after it is installed in a particular application.
If Jumper 3 (Airflow Switch) is intact (No Airflow Switch), then
a jumper must be installed between Terminals 6 and 7. If
Jumper 3 is clipped (Airflow Switch is present), the RM7830A
or RM7850A will lockout if it detects a jumper between
Terminals 6 and 7.
Table 4. Site Configurable Jumper Options.
Jumper
Number Description
JR1 First Safety Time
JR2 Main Trial Time
JR3 Airflow Switch
18
Intact Clipped
5 seconds 3 seconds
5 seconds 3 seconds
No Yes