Electrical Diagram - Bosch 940 ESO Installation Manual
For outdoor installations only temperature modulated with electronic ignition suitable for heating potable water and space heating (intended for variable flow applications)
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Also See for 940 ESO:
- Instruction manual (60 pages) ,
- Manual (52 pages) ,
- Applications manual (107 pages)
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Electrical diagram
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20
19
18
17
21
Fig. 60 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
Jumper resistance
11
12
Water valve
13
Primary fan
ON/OFF switch
14
15
Secondary fan
16
AC plug
Main connection
17
18
Ignition electrodes
19
Ground post
20
Antifreeze kit connection
21
Fuse
22
Fuse
6 720 644 956
15
13
M
M
22
12
M
E
PS
T=104°C
T=220°F
20
...
16
...
1
14
JP2
JP8
JP7
JP6
JP5
6720608158-92.1AL
Electrical diagram
11
10
9
T=110°C
T=230°F
8
7
FS
6
Casc.
5
input
Casc.
output
Back flow
1
4
3
2
1
43
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