![]() The wiring schema in my first post was the correct identification. High motivation to get this wired up since it was probably another 10 degrees inside. Of course, I picked the perfect 90+ degree day to be working on this in my driveway. I don't know if this is just a difference in systems or what.Īgain, all, really appreciate taking the time to give me some feedback.Īdding some info in case anyone in the future needs this as a reference. It looks like your heater control is going to G, which for me I think would be feeding my A/C. In your second link, pic 11, I don't see the blue wire, but then it appears in pics 17, 18, you have the blue wire going to W, which in my case I have a white wire (Heater control) going to W. I can't quite tell but it appears you are dealing with a couple t-stats? Some of these pics are kind of throwing me. Based on the rest of your comments, since my t-stat is battery, can I gather you don't think the blue VDC(-) is needed? As with the above, should I hook it up outside the t-stat loop per my comment? Second, WDK450, in the link you provided to the the "Upgrading analog." thread, that is exactly the wiring I have right now, which gives me heat only. Kind of like in the example in the image in my first post. So, I guess I would then ponder, does it do any good or harm to connect the blue wire that leads to the A/C to the VDC(-) that is not connected to the t-stat. From your comment, it would seem you think it is not relevant to the operation of the A/C. So, as I am learning more, I think what I am pondering is whether or not the blue has any purpose in the functionality of the A/C, or is it just there to close the loop on the t-stat. In that example, it appears as if the blue wire going to the original t-stat is simply left disconnected. A few more questions and comments from me.įirst, COOKIE, the link you provided is the exact t-stat I have. See the image for what I am describing, and the blue line is what I am proposing.Īll - first, thanks for taking the time to reply. In that case they simply capped off the blue wire and made no connection at the t-stat, but I have no idea if there was any VDC(-) supplied to the A/C elsewhere, or even if it is needed. The analog t-stat had a blue wire connection. I saw one thread where someone actually installed the exact same thermostat from an analog t-stat that already had A/C control. I am wondering how important it is for the control panel on the A/C to connect to this at the t-stat? I could easily connect the new control panel straight to the VDC(-) at the same connection point at the heater and bypass the t-stat. However, at my heater, there is a straight connection to a 12VDC(-). Since I am using a household t-stat, I don't have a VDC(-) wire running to it. Although, probably at first I am simply going to wire the green and only have high fan. The new wiring says I need to connect the control board to the thermostat as follows :Ī/C -> green wire-> t-stat for, I believe, high A/C fanĪ/C -> gray wire to t-state, I think this is low A/C fanĪ/C -> yellow wire to t-stat, this should be A/C relayĪ/C -> blue wire to t-stat - this is labeled as 12 VDC(-), and then the diagram shows that there should be a 12VDC(-) connection to the t-stat.įor the most part, I am OK with the green, gray and yellow. This thermostat wire goes up the wall, past my A/C and over the the thermostat, so I am going to tap right into that wire. So, that is what is giving me my 12VDC (+) and my heater control. Currently, my t-stat only controls my heater, and my A/C controls are located on the ceiling unit.Ĭurrent wiring to the thermostat consists of a single red and single white wire coming off of my heater. My particular thermostat is a digital LUX household thermostat. I am in the process of installing one of the Airxel Circuit Boards that will allow me to connect my A/C to be thermostat controlled. Just curious if anyone here has had this specific situation. I did a search for this issue, and see some that are close but not quite the same.
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