[mrweasel]

Normally the only pipe that's available to dishwashers is the cold water pipe.

However, even if you had hot water available, it would actually be to hot. The hot water entering can be much hotter than the required 30C for the lowest setting, so the dishwasher would need to cool the water.

[sgerenser]

In the U.S. dishwashers are almost always installed directly next to the kitchen sink, where either the cold or hot line can be easily tapped with a tee valve. I guess plumbing/kitchen layout is done differently in Europe.

As for heat setting, what’s the reason to be concerned with tap water being too hot? I don’t think plumbing code would allow water to be available at the tap that was hot enough to actually damage any type of utensil/drinkware/etc? I presume the only reason there might be a lower heat setting is simply for energy savings, which is kind of moot if you’re instead pulling hot water from the efficiently heated water supply.