Honeywell round to LUX TX500 Thermostat - http://www.hvacmechanic.com/ Forums

Original message

philipleung366

67.80.171.123

"Honeywell round to LUX TX500 Thermostat" , posted Wed 28 May 22:02

I have an existing old Honeywell round thermostat in my house controlling the A/C and baseboard heating. I have bought a
LUX TX500 programable thermostat. Could someone show me how to map the wires from the old one to the new one? Thanks a lot!

Replies:

Banger

70.160.131.133

"Re(1):Honeywell round to LUX TX500 Thermostat" , posted Sat 31 May 08:39

The Lux and the honeywell both use the same terminal identifiers so you should be able to look at where the old wires were and match them up to the new thermostat terminals. If the wire came from the Y terminal, put it back on the Y terminal, etc. Be careful you don't mix up the 2 R terminals, Rh is for heat and Rc is for cool. Your system may have them seperated if you have hot water heat.