Honeywell RM7838B1013 User Manual

RM7838B,C 7800 SERIES RELAY MODULE
32-00199—01 20
Keyboard Display Module
The KDM (see Fig. 8) is provided with the RM7838B,C
Relay Module. The first line of the Vacuum Fluorescent
Display (VFD) provides:
a. Current status of the burner sequence
(STANDBY, PURGE, PILOT IGN, MAIN IGN and
RUN).
b. Timing information (PURGE, PILOT IGN and
MAIN IGN) in minutes and seconds.
c. Hold information (PURGE HOLD).
d. Lockout information (Lockout, Fault Code, Mes-
sage and Sequence).
Fig. 8. RM7838B,C Relay Module operation (not using pilot valve hold); see Fig. 9 for the
RM7838C1020/RM7838C2020.
INITIATE
POWER
LED
DISPLAY
PILOT
FLAME
MAIN
ALARM ALARM
STANDBY
(INDEFINITE)
POWER
ALARM
POWER
DRIVE
TO
HIGH
FIRE
DRIVE
TO
LOW
FIRE
5
SECONDS
MAX
2010000000 00
10 SEC 10 SEC
HOLD
(INDE-
FINITE)
HOLD
(INDEFINITE)
J3 INTACT
PURGE
PURGE TIME IS SELECTABLE
THROUGH VARIOUS
ST7800 PURGE TIMER CARDS
PFEP
J1 INTACT (10 SEC)
J1 CLIPPED (4 SEC)
MFEP NORMAL
BURNER
RUN
RM7838B/C ENERGIZED (TERMINAL 4 AND L2)
TERMINAL 3 ENERGIZED (ALARM)
TERMINAL 6 ENERGIZED (LIMITS/STOP SWITCH)
LF SWITCH CLOSED (TERMINAL 18)
HF SWITCH CLOSED (TERM 19)
PREIGNITION INTERLOCKS CLOSED (TERM 20 ENERGIZED)
SAFE START CHECK
TERMINAL 13 TO 12
TERMINAL
13 TO 15
TERMINAL 13 TO 14 TERMINAL 13 TO 14
TERM 10
TERMINAL 5 ENERGIZED (COMBUSTION AIR FAN)
TERMINAL 7 ENERGIZED (COMBUSTION AIRFLOW SWITCH)
TERMINAL 8 ENERGIZED (J2 INTACT)
TERMINAL 17
FLAME PROVING
TERMINAL 9
TERMINAL 8 ENERGIZED (J2 CUT)
MAIN
PILOT
FLAME
POWER
MAIN
PILOT
FLAME
POWER
MAIN
PILOT
FLAME
POWER
M9745E
3
1
2
1
1
1
ALARM IS OFF FOR RM7838C.
WHEN CONFIGURATION JUMPER J3 IS CLIPPED, THE RM7838B/C AUTOMATICALLY CONTINUES INTO THE MFEP (NO WAITING TIME BETWEEN THE PFEP AND MFEP).
T17 MUST CLOSE WITHIN 10 SECONDS.
ALARM (TERMINAL 3) IS DE-ENERGIZED AS SOON AS FLAME IS DETECTED (RM7838B ONLY).
NORMAL SHUTDOWN OCCURS WHEN TERMINAL 6 IS DE-ENERGIZED.
15 SECONDS FOR RM7838C.
3
4
5
5
4
2
PFEPINITIATE PURGE
ALARM
POWER
START MFEP RUN
TERMINAL 21 ENERGIZED
(IGNITION)
(INTERRUPTED
PILOT)
(INTER-
MITTENT
PILOT)
(STARTS
MFEP)
(MAIN
VALVE)
OPERATING
CONTROLS
AND
INTERLOCKS
FLAME
SIGNAL
FIRING
RATE
MOTOR
BURNER

Honeywell RM7838B1013 Specifications

General

Brand	Honeywell
Model	RM7838B1013
Category	Control Unit
Language	English