16
EC7830, RM7830A,EC7850A,RM7850A 7800 SERIES RELAY MODULES
66-1092—2
66-1092—2 R. R. Rev. 8-98
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
www.honeywell.com
2. In the measured PURGE sequence, the Run/Test
Switch, placed in the TEST position, causes the
PURGE timing to stop. The firing rate motor is in the
High Fire position.
3. In Purge Drive to Low Fire position, the Run/Test
Switch, when placed in the TEST position, holds the
burner in PURGE with the firing rate motor in the Low
Fire position (EC/RM7850A).
4. During the PILOT STAB. period, the Run/Test Switch,
when placed in the TEST position, stops the timer,
allowing for pilot turn-down test and other burner
adjustments. This activates a 15-second flameout timer
that permits pilot flame adjustment without nuisance
safety shutdowns.
5. During Run, the Run/Test Switch, when placed in the
TEST position, drives the firing rate motor to the Low
Fire position.
IMPORTANT
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.
SETTINGS AND ADJUSTMENTS
Selectable Site-Configurable Jumpers
The relay module has three site-configurable jumper options,
see Fig. 6 and Table 6. If necessary, clip the site-configurable
jumpers 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
200 hours occur, the relay module locks 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. If JR3 is
clipped (Airflow Switch is present), the relay module locks out
if it detects a jumper between terminals 6 and 7.
Jumper
Number
Description
Intact
Clipped
JR1
First Safety Time
5 seconds
3 seconds
JR2
Main Trial Time
5 seconds
3 seconds
JR3
Airflow Switch
No
Yes
SERVICE NOTE:
Clipping and removing a site-configurable
jumper enhances the level of safety.
Fig. 6. Selectable site-configurable jumpers.
Table 6. Site-configurable jumper options.
SERVICE NOTE:
Clipping and removing a site-
configurable jumper enhances the level
of safety.
IMPORTANT
Clipping site-configurable jumpers after 200 hours of
operation results in a nonresettable Code 110,
LOCKOUT. The relay module must be replaced.
Flame Signal Measurement
Measure the flame signal at the appropriate times as defined
in the applicable flame amplifier specifications.
For further checkout and troubleshooting, see form 65-0229.
RUN/TEST SWITCH
SELECTABLE CONFIGURATION
JUMPERS
M7701B