Honeywell RM7840L Installation Instruction

66-1085—3
10
RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES
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WIRING
SUBBASE
RUN/TEST
SWITCH
RELAY
MODULE
CONFIGURATION
JUMPERS
PURGE
TIMER
SEQUENCE
STATUS
LED PANEL
RESET
BUTTON
KEYBOARD
DISPLAY
MODULE
(STANDARD ON
RM7800E,G,L,M)
CAPTIVE
MOUNTING
SCREW
FLAME
AMPLIFIER
M16353
SAFETY SHUTDOWN
Fig. 5. RM7800IRM7840 Relay Module exploded view.
d. Ignition/pilot valve/intermittent pilot valve terminal is
energized.
e. Main valve terminal is energized.
Safety Shutdown (Lockout) occurs if any of
the following occur during the indicated
period:
1. INITIATE Period:
a. Purge card is not installed or is removed.
b. Purge card is bad.
c. Configuration jumpers are changed (after 200 hours
of operation).
d. Ac line power errors occurred, see Operation
section.
e. Four minute INITIATE period has been exceeded.
2. STANDBY Period:
a. Flame signal is present after 40 seconds.
b. Preignition Interlock is open an accumulative time
of 30 seconds.
c. Interlock check feature is enabled and the
Interlock String (including airflow switch) is closed
for 120 seconds with controller closed.
f. Internal system fault occurred.
g. Purge card is not installed or is removed.
h. Purge card is bad.
3. PREPURGE Period:
a. Preignition Interlock opens anytime during
PREPURGE period (RM7840E,L).
b. Flame signal is detected after first ten seconds
during PREPURGE (RM7840E,L).
c. High Fire Switch fails to close within four minutes
and fifteen seconds after the firing rate motor is
commanded to drive to the high fire position at the
start of PREPURGE (RM7840E,L).
d. Low Fire Switch fails to close within four minutes
and fifteen seconds after the firing rate motor is
commanded to drive to the low fire position at the
end of PREPURGE.
e. Running Interlock does not close within 30 seconds
(RM7840G,M).
f. Lockout Interlock does not close within 10 seconds
(RM7840E,L).

Honeywell RM7840L Specifications

General

Brand	Honeywell
Model	RM7840L
Category	Control Unit
Language	English