01-25-2023 05:48 PM
I am replacing a Robert-Shaw thermostat on a two stage geo-thermal heat pump which provides both heat and air conditioning . There is no emergency heat backup on the system . Hopefully I can use a Google Nest but currently I have 7 wires connected as follows: Most Nest diagrams show 4 or 6
C - blue
R - Red
Y1 - Yellow
W2 - White
Y2 - Brown
G - Green
O - Orange
There is nothing connected to E/W1 or B.
Do I just transfer wires to corresponding terminals regardless of color ?
Much obliged in advance
01-25-2023 06:46 PM
Try this
Red to Rc
Orange to O/B
Since you do not have aux heat put White to W1
Match up the rest
If it is not working in correct mode you might have to go into the settings for OB wire it has A or B output mode so if you get Air Cond when you wanted Heat switch the OB setting.
01-29-2023 10:29 AM
Hello there,
Thanks for confirming the wiring configuration, @Houptee.
@Noreaster, I wanted to stop by and see how I could help. How's it going? Have you tried installing your new Nest Thermostat? Also, here's a quick reference on how to install a Nest Thermostat. Please let us know if you have any other questions or concerns.
Regards,
Mark
02-01-2023 10:36 AM
Hi Noreaster,
I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.
Thanks,
Mark
02-02-2023 10:39 AM
Hello Noreaster,
I'm checking in to make sure that you've seen our response. Please let us know if you have any additional questions or concerns before we lock this thread in 24 hours.
Thanks,
Mark