The model number is TP-WEM01-A, installed with the "large backplate", as pictured below.
There are no visible screws, etc. I have the manual but it is no help.
The thermostat is simply pressed onto the mounting bracket and "snaps" into place.
veja a Guia de instalação or Carrier's video; at ~2:20, it shows the thermostat being mounted.
Since there is no description for removal, I'd try prying suavemente along the four edges, between thermostat and wall.
BTW, o manual do proprietário omits mounting the device.
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