Replacing old Baystat240A with new honeywell 3100A. Can anyone help me with the wiring.
Old Baystat Color Code
R-Red
T-Tan
O-Orange
G-Green
Y-Yellow
X2-Black
B- Bl
U and W are jumped with White wire

New Honeywell 3100A
E-
Aux-
Y-
G-
O-
L-
R-
B-
C- has on it Optional with Battery
can you tell me what wires go from baystat to new honeywell

First check the resources available posted here at the beginning of this board under sticky notes. There is much thermostat wiring info there.

I have no direct wiring change over for a Baystat so you might have to trace the wiring back to the unit to se where it goes.

Honeywell has a toll free number for you to call for help.
It is located on the papers that came with your nre thermostat.