Install Instructions

19 65-0100—2
12
Q7800
13
14
15
16
18
17
19
20
21
22
G
L2
9
8
7
6
5
4
3
10
F
G
L2
9
8
3
7
M2544B
A
E
F
1ST STAGE
FUEL VALVE
2ND STAGE
FUEL VALVE
(OPTIONAL)
10
IGNITION
TRANSFORMER
FOR DIRECT SPARK IGNITION 
(OIL OR GAS)
21
9
L2
GENERAL FOOTNOTES, SEE PAGE 5.
A
B
C
C
D
D
E
C
E
1234
5
78
15
B
6
7800 SERIES CONVERSION WIRING DIAGRAM
FROM________________________________ TO ______________________
(DEVICE TO BE MODERNIZED) (O.S. NUMBER OF RELAY MODULE TO BE USED)
L1&4
R4150A1056, A1163, A1189, A1239
RM7840M1017 OR RM7800M1011
AIR FLOW SWITCH MAY HAVE BEEN 
CONNECTED BETWEEN Q520 
TERMINALS 10 AND 11. CONNECT 
BETWEEN Q7800 SUBBASE TERMINALS 
6 AND 7. BE SURE AIR FLOW SWITCH 
IS RATED TO HANDLE LOADS ON Q7800 
SUBBASE TERMINALS 8, 9, 10 AND 21.

REPLACEMENT RM7840/RM7800
PROVIDE 5 SECOND IGNITION VS. 10.

JUMPER Q7800 SUBBASE TERMINAL
4 TO 13 AND TERMINAL 14 TO 18.
LOCATE THIS JUNCTION
OR TERMINAL 16 
AND CONNECT IT TO
Q7800 SUBBASE
TERMINAL 6

LOCATE THE START INTERLOCKS AT THIS POINT AND 
CONNECT IT TO Q7800 SUBBASE TERMINAL 20. 
START INTERLOCKS NOW BECOME PREIGNITION 
INTERLOCKS. IF START INTERLOCKS ARE NOT USED,
JUMPER Q7800 TERMINALS 4 TO 20.
LIMITS
CONTROLLER
START
INTERLOCKS
AIRFLOW
SWITCH
L1
3
4
5