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Technical Characteristics and Dimensions

6 720 608 992 (2018/01)

2.6 Functional diagram of the heater

Fig. 2 Functional diagram

[1] Pilot burner

[2] Ignition Electrode

[3] Ionisation probe

[4] Heat exchanger

[5] Main burner

[6] Injector

[7a] Burner pressure test point

[7b] Gas inlet pressure test point

[8] Slow ignition valve

[9] Venturi

[10] Temperature/volume selector

[11] Water valve

[12] Plunger

[13] Water flow regulator

[14] Water filter

[15] Hydrogenerator

[16] Cold water pipe

[17] Diaphragm

[18] Main gas valve

[19] Maximum gas adjusting screw

[20] Gas supply pipe

[21] Gas filter

[22] Hot water pipe

[23] Ignition unit

[24] Temperature sensor

[25] Servo valve

[26] Power selector

[27] Gas valve

[28] Pilot valve

[29] Pilot injector

[30] Pilot gas pipe

[31] Overtemperature switch

[32] Flue gas safety device

[33] Relief Valve/Drain screw

171819207b21

6720608992-05.1V

Bosch GWH 16-2 G Series User Manual

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