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10
Electrical diagram
16
20
19
18
17
Fig. 66 Electrical scheme
[1]
Intlet water temperature sensor
[2]
Outlet water temperature sensor
[3]
Backflow temperature sensor
[4]
Cascading output connection
[5]
Cascading input connection
[6]
Ionization sensor
[7]
Water flow sensor
[8]
Flue gas limiter
[9]
Heat exchanger overheat sensor (ECO)
[10] Gas valve
[11] Jumper resistance
[12] Water valve
[13] Primary fan
[14] ON/OFF switch
[15] Secondary fan
[16] AC plug
[17] Main connection
[18] Ignition electrodes
[19] Ground post
[20] Antifreeze kit connection
[21] Fuse
[22] Fuse
RTG 199 ME – 6 720 811 615 (2015/04)
15
M
21
22
13
12
M
M
E
PS
16
16
...
...
1
1
20
20
14
JP2
JP7
JP5
11
10
T=104°C
9
T=220°F
T=110°C
T=230°F
8
7
FS
6
...
...
1
1
JP8
JP6
6720608158-92.1AL
Electrical diagram
Casc.
5
input
Casc.
4
output
3
Back flow
2
1
47
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