Question about Kibernetik KS50L

As with any refrigerator, the refrigerator gives off heat to the rear, which must be dissipated. It can remain "enclosed" at the sides, but there must be enough space at the back and the air must be able to circulate.

rather no, or if so then only in a partially closed sideboard. The fridge needs air to cool and will otherwise overheat. So it certainly has to be open at the back.

According to the operating instructions, the refrigerator must not be locked in.