Does air-con leaking fluid make sense?

[scootermcscoot]

We got the bus back after having the control arm mounts fixed and we have some kind of leak. Gordy is based on an 07 Chev 3500 express van with the diesel engine.

As you stand in front and look at the engine, at the back left hand corner is a black box that says something about compressed refrigerant for air conditioning and there is a drip coming from there. looks and feels like water, clean and clear (and according to the g/f tastes like water, I know right). The box has what looks like aluminum pipes coming out that seem to go into the little mini rad in front of the engine rad. Is this the air con system leaking or is part of the engine cooling system?

[brokedown]

Without seeing it I'm gonna say that's condensation from the air conditioner.

Edit: and that's totally normal and expected.