They just installed the following system:
Air handler: TAM7AOC42
Clean Effects: TFD235CLA
The first crew installed a XL800 thermostat (not the one I ordered), but agreed to come back Monday to replace it with the XL950 (the correct one).
When they installed the XL950, the guy told me that the wiring was all wrong because of the XL800, and had to rewire the system. He messed with the condenser and with the air handler. He installed a BAY24VRPAC52DA relay panel right on the air handler.
From the XL950 installation guide, it seems that the BAY24VRPAC52DA relay panel is used to make the XL950 talk to non-communicating systems. But I was told by the sales guy that my system is a communicating system and the XL950 would be able to talk to it.
Why would the second installer have added the BAY24VRPAC52DA relay panel when he installed the XL950? Does this seem right?
Thanks in advance for your reply.
P.S. Oh, and besides that, when he left, the outside temperature sensor reported 18 degrees (clearly incorrect for South Florida). He said that it would "fix itself" in 24hrs. In fact, the XL950 started showing the correct outside temperature only after I registered it and requested weather information vie the Internet. But I suspect that this is only masking the incorrect reading from the outside temperature sensor.