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7800 SERIES CONVERSION WIRING DIAGRAM
FROM__________________________
RA890
(DEVICE TO BE MODERNIZED)
Q7800
G
G
2
7
2
L2
3
11
4
E
5
(L1)
1
D
6
4
6
F
13
4
7
F
3
8
5
9
4
10
F
F
6
1
2
3
7
8
9
GENERAL FOOTNOTES, SEE PAGE 4.
A
B
(O.S. NUMBER OF RELAY MODULE TO BE USED)
12
8
13
14
15
16
17
18
19
20
21
22
12
4
5
6
10
11
12
13
TO ____________________
RM7895
10
IF THE APPLICATION HAS EXTERNAL PURGE TIMING
A
AND/OR ON AN EXTERNAL INTERRUPTED
PILOT RELAY, THEN CONVERT TO RM7895.
OTHERWISE CONVERT RA890 TO RM7890.
REMOVE EXTERNAL PURGE TIMER AND/OR
B
INTERRUPTED PILOT RELAY.
SELECT RELAY MODULE:
C
• RM7895A - INTERMITTENT PILOT WITHOUT
AIRFLOW SWITCH CHECK.
• RM7895B - INTERMITTENT PILOT WITH
AIRFLOW SWITCH CHECK.
• RM7895C - INTERRUPTED PILOT WITHOUT
AIRFOLW SWITCH CHECK.
• RM7895D - INTERRUPTED PILOT WITH
AIRFLOW SWITCH CHECK.
CONNECT 120 VAC POWER TO Q7800 TERMINAL 5 (L1).
D
ON POWER BURNERS, IDENTIFY BURNER MOTOR
E
WIRE ON Q270 SUBBASE TERMINAL 3 AND CONNECT
IT TO Q7800 SUBBASE TERMINAL 4.
THE LINE VOLTAGE AIRFLOW SWITCH (IF USED) IS TO
F
BE INSTALLED BETWEEN SUBBASE Q7800 TERMINAL 6
AND TERMINAL 7.
IF APPLICATION HAD AN EXTERNAL PURGE TIMER,
G
THEN SELECT A PURGE CARD THAT MATCHES THE
TIMING OF THE EXTERNAL PURGE TIMER.
7
C
M6012
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