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Changing Trane Baystat240a to another thermostat

Home Improvement Asked on March 12, 2021

I want to change my current thermostat to a programmable electric one (no batteries). Could someone verify if it does have a common wire and if all wiring could fit modern thermostats?

Looking at the schematics I can see that there is a common wire present but I want to make sure.

–UPDATE–
If I were to go with Honeywell Touch Wifi (RTH9580) would the following wiring work? I am still missing T and F.

Honeywell touch

B -> C

R -> R

O -> W-O/B

Y -> Y

G -> G

W and X2 (both on)-> W2-Aux/e

T = ?

F = ?

One Answer

Trane units all use Blue as their 24 volt Common for their control circuits, Common is called this because all the 24 volt circuits return to Common to complete the 24 volt circuits.enter image description here

Answered by Keith Grayson on March 12, 2021

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