Hello I am new to this forum. I have question for anyone that can help. I am in the process of installing a new system. I purchased the 2 stage 5 ton water to air unit with no backup (electric/gas). I was wiring and configuring the thermostat and something came up. The thermostat has multiple settings to chose from. The two setting that I think should be able to be used are. The first is the 2H 2C. The problem have with that is the manual says to wire the 2nd stage of cold to Y2 and it says the 2nd stage of hot to the W2. The unit has one only one wire listed for a second stage witch is a orange wire, can these be jumper-ed together? The other option is the 3H 2C setting which says the 2nd stage is Y2 is for both. I have it configured this way now for testing and it does seam to work correctly. The only problem with this I see, is that it states the manual that stage 1 and 2 will shut off if 3 is turned on. I am hoping I am just miss understanding this. Is that true? Being that I don't have anything plugged in as a back up. I am guessing the system would shut down and I would have no heat. And of course that would only happen when its really cold. I would not want that to happen. So what would be the correct configuration? Thank you Oh and just as a side note: I do have back up in the form of a direct vent furnace and wood pellet stove. My plan is these are only needed or used during really cold days. They are set to turn on by there own thermostat and not be controlled by the geothermal.