I don't have the Trane Manual, I do however have the Honeywell installation Manual. The used Trane terminals are as follows; X2, O, G, Y, T, R, W & B, the Honeywell has; E, Aux, Y, G, O, L, R, B & C.

The wire marked "T" has no home in the Honeywell and if that's true terminals "B" & "L" will not be used.

JRW

According to the Honeywell instructions, the wire previously attached to the B terminal on the Trane Baystat to the C terminal on the Honeywell. This will leave the the B and L terminals unused in the Honeywell, they are as listed;

Honeywell Trane

E - X2
W - Aux
Y - Y
G - G
O - O
L - unused
R - R
B - unused
C - B

Honeywell's instructions say that if you have an O and a B, place the B wire in the C terminal.

JRW
39852.0270256134

Not sure whether it works or not, I'm hesitant to hook it up that way until I am reasonably certain I won't cause a larger problem.

JRW