Principal Technical Features - Honeywell RM7838B Installation Instructions Manual

SEQUENCE
STATUS
LED PANEL
RESET
BUTTON
KEYBOARD
DISPLAY
MODULE
Mounting Other System Components
(Fig. 4)
Mount other required and optional system components by
referring to Fig. 4 and the instructions provided with each
component.
PRINCIPAL TECHNICAL
FEATURES
The RM7838B,C provides all customary flame safeguard
functions as well as significant advancements in safety,
annunciation and system diagnostics.
RUN/TEST
SWITCH
RELAY
MODULE
CONFIGURATION
JUMPERS
PURGE
TIMER
POWE R
PILOT
FLAM E
MAIN
ALAR M
SC RO LL
MO DE
- SA VE -
Fig. 6. RM7838B,C Relay Module exploded view.
RM7838B,C 7800 SERIES RELAY MODULE
WIRING
SUBBASE
RESE T
Safety Shutdown (Lockout) Occurs
If:
1. INITIATE Period
a. Purge card is not installed or removed.
b. Purge card is bad.
c. Configuration jumpers were changed after
200 hours of operation.
d. AC line power errors, see Operation.
e. Four minute INITIATE period is exceeded.
2. STANDBY Period
a. Flame signal is present after 240 seconds after Run
Complete.
b. Preignition Interlock is open after 30 seconds.
c. Ignition/pilot valve terminal is energized.
d. Main valve terminal is energized.
e. Internal system fault.
f. Purge card is not installed or removed.
g. Purge card is bad.
h. Flame detected during the last two seconds.
13
H O N E Y W E LL
CAPTIVE
MOUNTING
SCREW
FLAME
AMPLIFIER
M 1 2 3 0
66-1094—08