When I had that same concern on my new unit I called the installer, I
know just enough to understand there is a safe operating output temp and
setting fan to low could be bad, and I dont know the safe limits. Also
with wired taps I did not want to make a mistake that could ruin a
board. So again I say talk to the installer first why risk ruining a
unit under warranty or doing something stupid that you are not familar
with. Installers have training and know their equipment and your house,
you don`t.