DIYbanter - View Single Post - Installing NEST Thermostat

Tony Hwang

wrote:
I just installed 2 of these nest thermostat in my house. Both 2 wire connection, un marked, The system is gas, radiant in floor heating and basically if you touch the 2 wires it completes the circuit and you have heat. My nest has a built in battery so it works even when i pull it off the wall. anyways you just need to connect W1 and RH and you are good to go, even if you get the wires backwards it will still work, i am not sure on if it will charge the nest if it is backwards. I am going to take a look at my relay box tomorrow and verify the color codes. i have both of the wired opposite so i know they work no matter what.

good luck.

On Saturday, 14 December 2013 07:52:40 UTC-8, Ian wrote:
I am installing a new NEST thermostat, replacing an old two wire mercury bulb furnace thermostat. There are only two unmarked wires. There's 24 V across the wires.

Can anyone tell me which letters on the NEST base (W, Y, O/B, AUX, E, G, C, etc) they will map to? It has to be the most basic of installations; open or close the circuit.

Thanks,

Ian
Hi,
Nest 'stat has firmware bug, never heard about it? Off topic their
smoke detectors are being recalled.