[. . . ] After adjusting the taps put the knob back in its position and turn off the flame. [. . . ] Then: - open the gas flow with a knob and light the adjusted burner, set the knob in the simmering position . And then, without changing that position, remove it from the tap's mandrel put a screwdriver in opening 'A" or mandrel opening "B" (depending on the type of the tap - fig. 03) and turn it, observing the flame, to achieve such a size of the flame that will prevent it from being extinguished in a slight draught or during the operation of quick switching from the full to the simmering position . In the event of a change of the type of gas replace the nozzles and adjust the taps. Before beginning these activities you must: - shut down the cock shutting off the gas supply system or cylinder from the hob, shut down all the taps in the hob, disconnect the hob from the mains. Then: Y118 Z097 X072 065 085 050 - remove the burners' lids and rings, remove the nozzles with socket wrench no. [. . . ] Then: Y118 Z097 X072 065 085 050 - remove the burners' lids and rings, remove the nozzles with socket wrench no. [. . . ]