07:59 Oct 25, 2009 

If I had asked a terminology question and it has been answered satisfactorily (meaning a correct answer) I would award the points - and, it is of absolutely no interest for what the asker finally went.
And, if I saw VL 80 °C, I would always read it as "Vorlauftemperatur 80 °C" (supply (flow) temperature).
And the glossary entry doesn't make much sense to me:
correct would be Continuous output l/h (supply temp. 80°C, tap temp. 45°C): [after the colon goes the amount, like 1,250]. Round brackets meaning: based on