Bosch Greentherm T9800 SEC 199 Installation And Operating Instructions Manual page 66

Indoor residential and commercial tankless water heaters

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66 | Electrical diagram

[1] Ionization sensor

[2] Fan

[3] Ignition electrode

[4] Power supply

[5] Connection for anti freeze kit

[6] Connection for remote control

[7] Gas valve - modulation solenoid

[8] Bypass water valve

[9] Electrovalve 3

[10] Electrovalve 1

[11] Electrovalve 2

[12] Gas valve - safety solenoid

[13] Thermal fuse

[14] Water flow sensor

[15] Flue gases temperature sensor

[16] Condensing unit flue gases temperature sensor

[17] Outlet hot water temperature sensor

[18] Air temperature sensor

[19] Heat exchanger hot water temperature sensor

[20] Inlet cold water temperature sensor

[21] External water temperature sensor/Aquastat

[22] Main water valve

[23] Cascading in/Out

[24] Touch control display connection

6 720 816 815 (2018/08)

Greentherm T9800 SE 160/199 | SEC 199

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