[Zeke]

PVC won't attach to ABS chemically. You'll have to mechanically attach it. You may find a saddle.

However, this is a bad idea for many reasons. Sewer gas is one.

Jeff, I'm surprised you do it the way you do. You aren't getting that inspected I assume.

908 has the right idea even though it isn't allowed here. Dump it into the vent stack.

Edit: I was mistaken about the vent stack. Apparently as long as the vent is a dry vent it is acceptable to dump condensate into the stack. This provision provides that in no way will the HVAC drain line be open in any way, including the tailpiece of a sink drain before the trap, that terminates within the living space. I suspect that it must not be covered an any way just as an electrical splice.