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Air Pressure
Switch
bk
b
g/y
br
M1
1 2 3 4 5
M6
b
20
M2
21
bk
22
15
16
M3
br
17
7
18
b
8
br
19
9
10
Ignition
11
12
Sequence
13
PCB
14
M4
Flame
Sensing
Electrode
br
b
Primary Sensor
Fan
H/W Storage
Sensor
br
- brown
bk
- black
b
- blue
r
- red
y
- yellow
g
- green
g/y - green / yellow
w
- white
40
2
1
bk
r
3
w
Reset
Switch
Relay PCB
M1
bk
1
bk
2
w
b
3
r
4
5
6
7
8
br
w
b
w
bk
g
r
r
r
b
br
Neon PCB
r
r
Differential Water
Flow Switch
Main PCB
w
M12
r
56
g
55
br
54
bk
53
r
bk
M11
FA4
r
49
b
50
br
51
r
52
48 47 46 45
M10
bk
br
g
br
br
r
bk
r
bk
1
A
DHW
CH
Selector
Control
Control
Switch
Knob
Knob
B
4
bk
bk
b
br
bk
bk
1
2
3
4
Optional Timers
12.0 Illustrated Wiring Diagram
br
b
b
Overheat
Thermostat
r
b
r
b
M7
30
29
28
27
26
25
24
g
w
r
bk
b
15
14
13
12
11
10
w
M6
FA3
23
w
22
21
FA1
20
5
FA2
19
bk
bk
18
br
br
bk
b
br
Suppressor
Blue
Brown
Mains
Blue
Mains
Brown
Green/Yellow
bk
g/y
b
bk
bk
Gas Valve
M5
17
16
br
M4
9
8
b
br
Pump
M1
2
1
M2
b
3
4
6
7
Diverter Valve
M3
br
b
br
Link
g/y
b
b
br
br
g/y
bk
Mains Input
bk
b
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