On my 1.6TD with ac and no PS, there are two v belts, one goes from crank to compressor and water pump, the other goes from compressor to alternator.
My bro has a 1.6NA, with only one belt for alternator, water pump, and crank.
My other bro's jetta 1.6NA with AC and PS has 3 V belts, but I can't remember the config.
Garry