Honeywell 7800 SERIES Manual page 5

Fig. 2—Mounting dimensions of RM7890 Relay Module and Q7800B Subbase in in. [mm].
BURNER CONTROL
POWER
PILOT
FLAME
MAIN
ALARM
RESET
5 [127]
Fig. 3—Rectification detectors.
IGNITION
ELECTRODE FLAME ROD
(Q179C ONLY)
21
1
32
[42]
1
3
8
[79]
25 25
32 32
[20] [20]
25
2 [62]
32
BRACKET
Q179
2
[51]
1
1 [32]
4
C7013A
5
[127]
REMOVE ONLY FOR TERMINAL TEST ACCESS.
1
CERAMIC
INSULATORS
1 [25]
13
1
32
[36]
TARGET
3
[10]
8
1
1
1
16
[13]
2
[27]
11
3
[2]
16
32
[18]
17
32
THREADED
[14]
MOUNTING
HOLES (2)–
10-32 UNF
M1983
5 5
1 [33] [8]
16 16
5
3
6 [155]
32
MOUNTING FLANGE
7
7 [183]
32
3
3
4
[95]
1/2–14 NPSM
LEADWIRES
C7012A,C,E,F
13 1
1 [32]
[21]
4
16
3
1
4
[45]
C7014A
RM7890A,B,C
SPECIFICATIONS
1
M5149
3/4–14 NPT OR
1–11-1/2 NPT
1
5
8
[130]
7
3
16
[87]
1
5 [133]
4
FACEPLATE
M1962
3
1 [35]
8
M1847
65-0126—2