Electrical Diagram - Bosch 520PN Applications Manual

10

Electrical diagram

Fig. 71 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
C 1210 ES/ESC
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