RM7838B,C 7800 SERIES RELAY MODULE
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2010 Honeywell International Inc.
66-1094—08 M.S. Rev. 09-10
Printed in U.S.A.
SETTINGS AND ADJUSTMENTS
Selectable Site-Configurable
Jumpers
The RM7838B,C has a three site-configurable jumper option,
see Fig. 8 and Table 7. If necessary, clip the site-configurable
jumper with side cutters and remove the resistors from the
Relay Module.
Fig. 11. Selectable site-configurable jumpers.
Table 8. Site Configurable Jumper Options.
a
Unclipped: RM7838B,C waits indefinitely for a 120V Man-
ual Open Valve input. When input is received, 10 second
MFEP begins. The RM7838B,C also turns on terminal 9.
b
Clipped: After the required PFEP, the RM7838B,C
immediately goes to MFEP by outputting 120 Vac to the
Main Valve terminal 9. At the end of the 10 second MFEP, if
there is not an input on the Manual Open Valve terminal
17, the RM7838B,C goes to safety shutdown. If automatic
main valves are used, a jumper is required between
terminals 4 and 17.
c
RM7838C1020 does not have JR3.
NOTE: SERVICE NOTE: Clipping and removing a
site-configurable jumper enhances the level of
safety.
IMPORTANT
Clipping and removing a site-configurable jumper
after 200 hours of operation results in a
nonresettable Fault 110 and a lockout.
RUN/TEST SWITCH
SELECTABLE CONFIGURATION JUMPERS
M7428
Jumper
Number Description Intact Clipped
JR1 Pilot Flame
Establishing Period
(PFEP)
10 seconds 4 seconds
JR2 Pilot Valve Intermittent Interrupted
JR3
a,b,c
Deferred or immediate
Main Flame
Deferred Immediate
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