Honeywell RM7838B1013 User Manual

RM7838B,C 7800 SERIES RELAY MODULE
32-00199—01 22
Fig. 10. RM7838B,C Relay Module operation (using pilot valve hold) (not RM7838C1020/RM7838C2020).
INITIATE
POWER PILOT FLAME MAIN
ALARM ALARM
STANDBY
(INDEFINITE)
POWER
ALARM
POWER
DRIVE
TO
HIGH
FIRE
DRIVE
TO
LOW FIRE
DRIVE
TO
LOW
FIRE
MAIN
VALVE
PFEP HOLD
5
SECONDS
MAX
10 SEC 10 SEC10 SEC 10 SEC45 SEC
HOLD
(INDE-
FINITE)
HOLD (INDEFINITE)
PURGE
PREPURGE TIME IS
SELECTABLE THROUGH
VARIOUS ST7800
PURGE TIMER CARDS
PFEP
J1 INTACT (10 SEC)
J1 CLIPPED (4 SEC)
MFEP MFEP
NORMAL
BURNER
RUN
NORMAL
BURNER
RUN
RM7838B/C ENERGIZED (TERMINAL 4 AND L2)
TERMINAL 3 ENERGIZED (ALARM)
TERMINAL 6 ENERGIZED (START/STOP SWITCH)
LOW FIRE SWITCH CLOSED (TERMINAL 18)
HIGH FIRE SWITCH
CLOSED (TERM 19)
PREIGNITION INTERLOCKS CLOSED (TERM 20 ENERGIZED)
SAFE START CHECK
TERMINAL 13 TO 12
TERMINAL
13 TO 15
TERMINAL
13 TO 15
TERMINAL 13 TO 14 TERMINAL 13 TO 14 TERMINAL 13 TO 14
TERMINAL 18
TERM 10
TERM 10
TERM 21 ENERGIZED
TERMINAL 5 ENERGIZED (COMBUSTION AIR FAN)
TERMINAL 7 ENERGIZED (COMBUSTION AIRFLOW SWITCH)
TERMINAL 8 ENERGIZED (J2 INTACT)
TERMINAL 17 ENERGIZED TERMINAL 16 ENERGIZED
FLAME PROVING
TERMINAL 9
TERMINAL 8 ENERGIZED (J2 CUT) TERMINAL 8
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT FLAME
POWER
MAIN
PILOT
FLAME
POWER
M9744F
PILOT VALVE HOLD
3
5
1 2 3
1
1
ALARM IS OFF FOR RM7838C. WHEN CONFIGURATION JUMPER J3 IS CLIPPED, THE RM7838B AUTOMATICALLY CONTINUES INTO THE MFEP (NO WAITING TIME BETWEEN THE PFEP AND MFEP). ALARM (TERMINAL 3) IS DE-ENERGIZED AS SOON AS FLAME IS DETECTED (RM7838B ONLY).
4 5 6
6
NORMAL SHUTDOWN OCCURS WHEN TERMINAL 6 IS DE-ENERGIZED. THE RM7838B/C STARTS THE PILOT VALVE HOLD SEQUENCE WHEN TERMINAL 16 IS ENERGIZED. THE RM7838B/C REMAINS IN PILOT VALVE HOLD INDEFINITELY OR UNTIL TERMINAL 16 IS DE-ENERGIZED. 15 SECONDS FOR RM7838C.
4
2
PFEPINITIATE PURGE MFEP RUN MFEP RUN
PILOT
VALVE
HOLD
(CLOSED)
PILOT
VALVE
HOLD
(CLOSED)
PILOT
VALVE
HOLD
(CLOSED)
PILOT
VALVE
HOLD
(CLOSED)
MOV SWITCH CLOSED
LED DISPLAY
2010000000 00 00 45 55
10
J3 INTACT
BURNER
OPERATING CONTROLS AND INTERLOCKS
FLAME SIGNAL
FIRING RATE M OTOR

Honeywell RM7838B1013 Specifications

General

Brand	Honeywell
Model	RM7838B1013
Category	Control Unit
Language	English