A "chemical" smell during the first firing is normal - stove enamel hardens only under heat. The process is called "burning-in", is described in the general operating instructions and is usually carried out by your specialist dealer.
Sometimes a stove smells at the beginning of the heating period. If the stove has not been used for a long time, dust has often collected on and in the appliance or on the stove pipe and is now burning.
If your stove smells unpleasant for a longer period of time, please contact your specialist dealer or our customer service. A child may have thrown a toy into the appliance between the top panel and the side panel. Or packaging material or tools were forgotten in the appliance during assembly. Rarely, inclusions in the natural stone also give off an unpleasant odour.