Install Instructions

33 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
4
7
M2514B
A
6
F1
GENERAL FOOTNOTES, SEE PAGE 5.
A
B
E
D
1234
5 78
15
18
C
C
C
B
7800 SERIES CONVERSION WIRING DIAGRAM
FROM________________________________ TO ______________________
(DEVICE TO BE MODERNIZED) (O.S. NUMBER OF RELAY MODULE TO BE USED)
L1&3
C
E
D
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
3
4
12
13
14
11
MAIN VALVE
10
IGNITION
TRANSFORMER
FOR DIRECT SPARK IGNITION 
(OIL OR GAS)
8
9
L2
For Insurance Requirements
5
Q535 OR Q536 SUBBASE HAD U1 AND U2 
TERMINALS THAT WERE USED FOR 
C7020 AND C7012E,F FLAME DETECTORS. 
A. TO MODERNIZE C7020 APPLICATIONS, 
CHOOSE A NEW DETECTION AND 
REWIRE PER RM7840/RM7800 
SPECIFICATIONS. 
B. TO MODERNIZE A C7012E,F
APPLICATION, USE THE EXISTING
SENSOR AND REWIRE PER 
RM7840/RM7800 SPECIFICATIONS.
TERMINAL 6 PROVIDED 30 SECOND MFEP. 
THE REPLACEMENT CONTROL WILL 
PROVIDE 15 SECOND MFEP.

INTERLOCKS
RM7840L/
RM7800L
RM7840E/
RM7800E
RUNNING INTERLOCKS 6–7 6–7
PREIGNITION INTERLOCKS 4–20 4–20
HIGHFIRE SWITCH* 5–19 4–19
LOWFIRE SWITCH* 5–18 5–18
* JUMPER WILL ADD ADDITIONAL 30 SECONDS
TO THE PREPURGE TIMING
TO MODERNIZE TO AN RM7840L,E OR
RM7800L,E TO MEET INSURANCE
REQUIREMENTS, THE FOLLOWING
INTERLOCKS ARE NORMALLY REQUIRED.
(CONNECT OR JUMPER INTERLOCKS AS
SHOWN TO THE Q7800 SUBBASE TERMINALS).
3
R4126A1008, A1016, A1024, A1032 A1040,
A1057, A1081, A1149
R4126B1006, B1014, B1022
RM7840E1016, RM7800E1010
RM7840L1018, RM7800L1012