If you are already planning to use the A/C, I don't see any problem with reclaiming the condensed water. You might as well reclaim the water from the vehicle A/C also.
I definitely would not run the A/C for the purpose of collecting condensation.
I would also not drink that stuff. It was probably clean water, back when the condenser was pristine and clean. Since it gets wet, it tends to collect dirt and fungus, etc.