The I/O documentation is out-of-date.

It seems air-cooled heat recovery chillers have been available in EnergyPlus since at least the 2014 release.

I'm able to make a model with an air-cooled chiller with heat recovery (OpenStudio 3.6.1, E+ version 23.1.0).

I made an issue on the E+ repo to clarify the documentation and provide and example .idf file of a model with an air-cooled heat recovery chiller.