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Ignition burner 3 is designed for igniting the main burner;
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Main burner 10 is designed for creating and burning air-gas mixture;
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Electronic control block 11 provides ignition control and gas supply to the ignition and main
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burners;
water temperature sensor 4 (Scheme 10, 11) is designed to measure the appliance's output water
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temperature;
flame sensor 8 ensures control of the ignition and main burners' operation;
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plug 9 is designed to create a spark charge for the ignition burner's ignition;
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Gag 14 is used for draining the water from the water heater's water circuit in order to prevent it from
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freezing; a safety valve integrated into the gag is designed to protect the appliance's water circuit from
high water pressure.;
thermo relay 16 (draught sensor) is designed to switch the appliance off in case of no draught in
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the exhaust flue
17
Technical staff manual
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