Install Instructions

65-0100—2 40
12
Q7800
13
14
15
16
18
17
19
20
21
22
G
L2
9
8
7
6
5
4
3
10
F
G
2 (L2) + 15
9
8
4
7
M2522B
A
5,6
F
GENERAL FOOTNOTES, SEE PAGE 5.
A
B
E
1234
5
7815
18
16
B
C
C
D
7800 SERIES CONVERSION WIRING DIAGRAM
FROM________________________________ TO ______________________
(DEVICE TO BE MODERNIZED) (O.S. NUMBER OF RELAY MODULE TO BE USED)
1 (L1) + 3
R4181A1000, A1026 RM7840G1014 OR RM7800G1018
C
E
D
CONNECT JUMPER BETWEEN Q7800
SUBBASE TERMINAL 5 AND 19 FOR 30
SECOND MFEP REQUIRED FOR TERMINAL
6 APPLICATION.

DISCARD JUMPER WIRES FROM Q477 OR
Q514 SUBBASE TERMINALS F TO 14 OR
F TO 16.

THE LOW FIRE SWITCH, IF REQUIRED,
WAS CONNECTED BETWEEN Q477 OR Q514
SUBBASE TERMINALS 1 AND 18. THE WIRE
FROM THE LOW FIRE SWITCH AND 1 MUST
BE IDENTIFIED AND CONNECTED TO Q7800 
SUBBASE TERMINAL 8.
IF NO LOW FIRE SWITCH WAS USED,
Q477,Q514 TERMINALS 1 AND 18 WERE
JUMPED. REMOVE TERMINAL 1 AND
CONNECT TO Q7800 SUBBASE TERMINAL 8.
NOTE: THIS JUMPER ADDS 30 SECONDS
TO THE PURGE TIMING.
LOCATE THIS JUNCTION 
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 OR 1
3
4
18
11
10
12
13
1ST STAGE
FUEL VALVE
2ND STAGE
FUEL VALVE
(OPTIONAL)
10
IGNITION
TRANSFORMER
FOR DIRECT SPARK IGNITION 
(OIL OR GAS)
21
9
L2