In principle it should be possible to just run some of the elements which would reduce the loading on your supply and the wiring needed (and work around the possible overloaded neutral previously mentioned) - but obviously it would then take longer to heat up. But as said, once up to temperature, they generally don't need all that much power - if you keep the door shut.
But then, are any of the controls taken from across two phases, or are they all taken off one 240V phase ?
I;ve certainly seen manuals/connection diagrams for 3 phase equipment (cookers) where the single phase model simply has a strap across the three phase terminals to connect the single phase to. From observation, there seems to be a tendency to take multiple neutral wires to a little tree of push on connections on the back of the terminal block - and if that's how the wiring has been done, then there wouldn't be a common neutral wire to overload.
But without seeing the wiring inside, impossible to say for certain.
But then, are any of the controls taken from across two phases, or are they all taken off one 240V phase ?
I;ve certainly seen manuals/connection diagrams for 3 phase equipment (cookers) where the single phase model simply has a strap across the three phase terminals to connect the single phase to. From observation, there seems to be a tendency to take multiple neutral wires to a little tree of push on connections on the back of the terminal block - and if that's how the wiring has been done, then there wouldn't be a common neutral wire to overload.
But without seeing the wiring inside, impossible to say for certain.
