Honeywell RM7897A1002 User Manual

RM7897A1002, RM7897C1000 7800 SERIES RELAY MODULES
5 66-1151
Fig. 3. Wiring subbase and sequence chart for RM7897C.
G
L2
3
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
MASTER
SWITCH
IGNITION
MAIN FUEL VALVE(S)
BURNER
CONTROLLER/LIMITS
BURNER MOTOR
(BLOWER)
10 SEC. INTERRUPTED
PILOT/IGNITION
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
DELAYED
(2ND STAGE)
MAIN VALVE
LINE VOLTAGE
ALARM
L1
(HOT)
L2
1
8
9
10
IGNITION
TRANSFORMER
MAIN VALVE
Q7800
2
L2
4
RUNNING INTERLOCK
(INCLUDING
AIRFLOW SWITCH).
FLAME DETECTOR
4
M22729A
PREIGNITION
INTERLOCK
120 VAC, 50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.
1
2
PROGRAMMABLE POST PURGE TIMING USING S7800A1142 KDM.
SEE FLAME DETECTOR SPECIFICATIONS FOR CORRECT WIRING.
PURGE TIME DEPENDS ON WHICH ST7800 IS INSTALLED.
3
4
5
POWER
OPERATING
CONTROLS
AND
INTERLOCKS
BURNER
FLAME
SIGNAL
INITIATE
(INITIAL
POWERUP
ONLY)
POWER
STANDBY
POWER
PILOT
FLAME
MAIN
PFEP
10 SEC.
(4 SEC. IF
JR1
CLIPPED
POWER
MFEP
PILOT
FLAME
MAIN
RUN
POWER
POSTPURGE
POWER
STANDBY
00 00 10
00
20
BURNER/BLOWER MOTOR
IGNITION
MAIN VALVE
LIMITS AND BURNER CONTROLLER CLOSED
PREIGNITION INTERLOCK CLOSED
SAFE START CHECK
FLAME PROVING
INTERRUPT/PILOT
8
10
5
9
6
TO
20TO5
L1
DELAYED MAIN VALVE
21
TIMED
PREPURGE
POWER
FLAME
MAIN
PILOT
ALARM
POWER
FLAME
MAIN
PILOT
ALARMALARMALARM
PII
SSC
LED
DISPLAY
RUNNING INTERLOCK
TO
3
5
6 7

Honeywell RM7897A1002 Specifications

General

Brand	Honeywell
Model	RM7897A1002
Category	Control Unit
Language	English