Luxpro PSP511LC to Nest Gen3 Thermostat wiring help

[D2022]

Has anyone done this before?  There is jumper between Rh-Rc and Y-W and the white cable is connected to "O".

Thank you so much for reviewing.

 

[Patrick_Caezza · Accepted solution]

Wire it like this

Red - RC to Rc (jumper to RH not needed

Yellow - Y to Y1 (jumper to W not needed)

Green - G to G

White - O to OB

[D2022]

Hello,

I have another question..   my AC / Heating unit has one of these Fan coil inside my unit for both AC & Heating.  https://www.tempstar.com/en/us/products/fan-coils/fvm4x/ .  The luxpro controller is used for both AC & Heating and I was wondering... isn't that the reason why the RC ( assuming C=Cooling ) & RH ( assuming H=heating ) is jumpered?

Also, according my research, the "W" is for heating and it is jumpered with "Y" which is for cooling. ( accordingly my research ).  

I see the pattern there since the luxpro thermostat controls both cooling & heating.

Would nest thermostat automatically know about these jumpers since it does not require jumpers?

Thank you!

[Patrick_Caezza]

There was a time when the heating and cooling systems were separate and each had its own power. This is why there are the Rh and Rc terminals, Rh is for heating and Rc is for cooling. At some point, they combined both heating and cooling into one unit with only one power source so you had to jumper the Rh and Rc terminals together to provide power to each part of the thermostat.

Jumpering the Y and W terminals together was required by some manufacturers of Heat Pump systems and I forgot why, but the new thermostats don't need to be jumpered anymore

[aatienza]

Hi D2022,

Thanks for the help, Patrick_Caezza.

Thanks for being here in the community and for providing further details about your wiring setup.

Chiming in to ensure everything is covered here. Let us know if you still need help, and the community will be happy to lend a hand.

Thanks,

Archie

[D2022]

Thank you.  I have received the thermostat and followed your instruction.  And it is in working flawlessly.   Thank you, again.   

[aatienza]

Hey D2022,

You're welcome! Let us know if you have any other questions, we're here to help.

Thanks,

Archie

[aatienza]

Hey D2022,

I'd like to bump in here to make sure that you've seen our response.

Please let us know if you have any other questions or concerns as I will be locking this thread in 24 hours.

Have a great day.

Thanks,

Archie

[D2022]

Thank you!

I have not tried it, yet, as my nest thermostat is still enroute with the carriers. I will update as soon as I try it out.