Settings And Adjustments; Selectable Site-Configurable Jumpers - Honeywell 7800 Series Installation Instructions Manual

adjustments. This activates a fifteen-second flame-
out timer that permits pilot flame adjustment with-
out nuisance safety shutdowns.
3. During Run, the Run/Test Switch, when placed in the
TEST position, drives the firing rate motor to the
OPEN position.
NOTE: When the 7800 SERIES 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.

SETTINGS AND ADJUSTMENTS

Selectable Site-Configurable Jumpers

The EC7820A Relay Module has three site-configurable
jumper options, see Fig. 5 and Table 5. If necessary, clip
the site configurable jumper with side cutters and remove
the resistors from the relay module. The relay module
reads the settings of these configuration jumpers at
startup. After 200 hours of main valve operation, the relay
module locks the jumper settings into internal memory. If
these jumpers are changed after the lockin occurs, the
relay module will lock out. This safety function assures
that the relay module cannot be modified after it is
installed in a particular location.
If JR3 (Airflow Switch) is intact (no Airflow Switch), then a
jumper must be installed between terminals 6 and 7 of the
wiring subbase. If jumper JR3 is clipped (Airflow Switch is
present), the relay module locks out if it detects a jumper
between terminals 6 and 7.
NOTE: Clipping and removing a site-configurable
jumper enhances the level of safety
CAUTION
Equipment Shutdown Hazard. Improper
procedure causes lockout.
Clipping and removing a Site Configurable Jumper after
200 hours of operation results in a hard lockout (Code
110)
EC7820A 7800 SERIES RELAY MODULES
RUN/TEST SWITCH
Fig. 5. Selectable site-configurable jumpers.
Table 5. Site configurable jumper options.
Jumper
Number Description
JR1 First Safety
Time
JR2 Main Trial Time
JR3 Airflow Switch
WARNING
Explosion Hazard.
Can cause serious injury or death.
Be sure all manual fuel shutoff valves are closed.
13
SELECTABLE CONFIGURATION
JUMPERS
M7701C
Intact Clipped
10 5
seconds seconds
8 seconds 5
seconds
No Yes
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