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Honeywell 7800 Series Installation Instructions Manual page 5

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

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Rm7897a1002Rm7897c1000