Carrier Performance EDGE Owner's Manual page 16

Using the EXP - Edge
TM
Expansion Port - to program the thermostat
Your Edge TMthermostat includes a unique EXP - Edge _-_.
Expansion Port - that allows you to use a digital memory _/ _:_.
card to program the thermostat on your computer. _-_._
Remove the dual port digital memory card and insert it in IIJ
your computer's digital or USB memory card reader. Follow"
the onscreen instructions to program temperatures, the corresponding
time, and the day of the week. You can even schedule your thermostat to
remind you to change your furnace filter, the UV light or humidifier pad.
When you've completed the process on your computer, simply reinsert
the card back into the EXP port on the thermostat. It will automatically
transfer the settings on the card to the thermostat.
I