Honeywell RM7838A User Manual

7800 SERIES RELAY MODULES
32-00213—01 10
Fig. 4. RM7838A Relay Module exploded view.
PRINCIPAL TECHNICAL FEATURES
The RM7838A provides all customary flame safeguard
functions as well as significant advancements in safety,
annunciation, and system diagnostics.
Safety Shutdown (Lockout) Occurs If:
1. INITIATE Period
a. Purge card is not installed or removed.
b. Purge card is bad.
c. Configuration jumper was changed (after 200
hours).
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.
b. Intermittent pilot valve/ 1st stage oil terminal is
energized.
c. Start Switch terminal 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.
3. PURGE Period
a. a.Flame signal detected during PURGE .
b. High fire switch fails to close within four minutes,
15 seconds after the burner switch, limit and
interlock string is closed.
c. ntermittent pilot valve/1st stage oil terminal is
energized.
d. Main valve terminal is energized.
e. Internal system fault.
f. Purge card is removed.
g. Purge card is bad.
h. Start Switch terminal is energized.
4. PILOT FLAME ESTABLISHING Period (PFEP)
a. Intermittent pilot valve/1st stage oil terminal is
not energized.
b. No flame is present at end of PFEP.
c. Internal system fault.
d. Purge card is not installed or removed.
e. Purge card is bad.
f. Main valve terminal is energized.
5. RUN Period
HONEYWELL
POWER
PIL
OT
FLAME
MAIN
ALARM
RES
ET
KEYBOARD
DISPLAY
MODULE
PURGE
TIMER
CAPTIVE
MOUNTING
SCREW
RUN/TEST
SWITCH
CONFIGURATION
JUMPERS
RELAY
MODULE
SEQUENCE
STATUS
LED PANEL
RESET
BUTTON
FLAME
AMPLIFIER
SCROLL
M
ODE
- SAV
E -
BURNER CONTROL
SUBBASE
(Q7800A1005
plastic panel
mount version)
M1230A

Honeywell RM7838A Specifications

General

Brand	Honeywell
Model	RM7838A
Category	Control Unit
Language	English