Is this PTAC unit self-evaporating?

Thank you for reaching out with your question. No, I am not seeing anywhere on the product page that this unit is self-evaporating, however I do see on the Installation Manual that this PTAC has a Dry Mode. While the Mode is set to Dry, the air conditioner will generally operate in the form of a dehumidifier. Since the conditioned space is a closed of sealed area, some degree of cooling will continue.
If you have any additional questions, please feel free to give our customer service line a call.