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The bit that looks like a detergent drawer is where the water collects and if your washer has a decent spin cycle that doesn't need emptied much. If you can, most will have a drainage hose you can use instead of having to empty that water drawer. Although, since I got it 3 weeks ago, I've only emptied it twice. Lint trap like normal and there's another filter in front of the intake for the heat pump bit (technical term) but I haven't touched that yet.
https://ao.com/product/dhr83431w-beko-heat-pump-tumble-dryer-white-76373-126.aspx
4amps and only 900w, I don't see why it would need it's own circuit.