Help

College student

For the record I'm not an HVAC tech that is why I am asking this question. all though I haven't decided weather to pursue my degree w/ HVAC or Electrical work. But anyway, on to my question. On most Pressure switches that Have seen have two inlets or outlets, I was wondering IF the outlet that has the black tip is the one that is supposed to run to the inducer? this is on an ARCOAIRE high EFF Natural Gas Furnace. Thanks for your time
Jon

Union Made

If this is one of the metal diaphram type pressure switches, then the purpose of the two connections is so it can read a differental pressure. If you are only using one connection it most likely is the one next to the terminal block. If looking at the switch you will see a crimped ridge around the edge of it. This would be where the diaphram is sealed to the housing. The two ports then would on either side of this ridge.