So, the house I'm living in currently has an old Chronotherm III thermostat and I'd like to replace it with a newer VisionPro thermostat that was given to me at work. I've tried to figure out where the old connections should go but it's confusing me somewhat and I'd rather not fry everything by trying. I'll post what I've found so far below, as well as some pictures of the current wiring of the old thermostat.
Chronotherm 3 Model - T8611G 1004
VisionPro Model - TB8220U 1003
Current Wiring of the Old Thermostat (Everything under the TYPE category is my best guess)
Wire -> Letter -- Type
Red -> R -- Standard 24V AC Hot Line (Heating)
Blue -> C & X2 -- 24 AC Common Line and either seond stage heating or indicator lights
Black -> L -- Service Light
Green -> G -- Fan On
White -> E & W2 -- Emergency Heat Relay and Second Stage Heating
Orange -> O -- Engergize to Cool(Control Valve)
Yellow -> Y -- Cooling Call
Here is a LINK
to pictures of the wiring that I've described above.
Any help getting the connections right would be helpful. Also, if someone could tell me what mode to set the new thermostat in (1H/1C, 3H/2C, etc...) that would also be great. Thanks for any help in advance!