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Electrical diagram
9 Electrical diagram
Fig. 72 Electrical scheme
1 Inlet 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 Exhaust temperature sensor
12 Water valve
13 Primary fan
14 ON/OFF switch
15 Secondary fan
16 Power supply cord
17 Power connection
18 Ignition electrodes
19 Ground post
20 Antifreeze kit connection
21 Fuse
22 Fuse
20...1
16...1
JP5
JP6
JP7
JP8
JP2
M
PS
MM
E
FS
T=104°C
T=220°F
T=90°C
T=194°F
Casc.
input
Casc.
output
2
1
4
5
6
7
9
10
11
12
13
15
16
20
19
18
21
22
17
14
8
Backflow
3
6720608158-01.1AL
T=110°C
T=230°F
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