Heat Pumps and Electric Heating - Converting York to Hunter Thermostat

Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.



PDA
LargeLouis
01-25-09, 12:43 PM
I have an York Mercury thermostat that I want to replace with a Hunter Programmable Thermostat. The York is a Q674L the Hunter is Model 44860. The question is the wiring. On the York the terminal and wire colors are:
W-White
B-Black
G-Green
R-Red
X-Blue
O-Orange
Y-Yellow.

Not sure what to do with the blue wire connected to the X terminal.

hvacservicetech
01-25-09, 01:33 PM
X is a common terminal for the 24 volt power. I think your stat is battery powered or system powered. So if it has a C terminal it goes there. If it don't then leave it off.
LargeLouis
01-25-09, 03:29 PM
Thank you. My stat is battery operated.