8Burner minimum maximumdiameter diameterTriple crown (ultra-rapid) 180 mm 260 mmMedium (semi-rapid)rear 120 mm 220 mmfront 120 mm 180 mmSmall (auxiliary) 80 mm 160 mmAs soon as a liquid starts boiling, turn down the flame so that it willbarely keep the liquid simmering.Use only pans or pots with flat bottom.If you use a saucepan which is smaller than the recommended size, theflame will spread beyond the bottom of the vessel, causing the handle tooverheat.Carefully supervise cooking with fat or oil, since these types of foodstuffcan result in a fire, if over-heated.The stainless steel can become tarnished if excessively heated. Thereforeprolonged cooking with potstones, earthenware pans or cast-iron platesis inadvisable. Also, do not use aluminium foil to protect the top duringuse.Make sure pots do not protrude over the edges of the cooktop and thatthey are centrally positioned on the rings in order to obtain lower gasconsumption.Do not place unstable or deformed pots on the rings: they could tip overor spill their contents, causing accidents.Pots must not enter the control zone.It is advisable to use cast iron recipients or steak plates only on the rearburners, so as not to damage the electronic lighting components.Using the hob correctlyTo ensure maximum burner efficiency, it is strongly recommended that you use onlypots and pans with a flat bottom fitting the size of the burner used, so that flamewill not spread beyond the bottom of the vessel (see the table beside).