Nest 3rd gen to Trane heat pump TEM4A0C42S41SAA

[MotorBikeMike]

My original thermostat has 7 wires connected as shown in the first photo. 

I've also included a photo of the nest unit. On the left side of the unit I have the wires attached on the right side I think the White wire should go to W1 and the Blue to C - I don't know where to connect the brown wire. (The black was not attached to anything and also was not stripped back.

A guess on my part is the Brown wire is not needed but that is a Wild Guess. If you know the correct answer I would be appreciate the help.

Thanks,

Mike

[MotorBikeMike]

I meant to say the White wire should go to W1.

Thanks,

[Patrick_Caezza]

@MotorBikeMike 

Yellow - Y to Y1

Green - G to G

Orange - O/B to OB

Red - R to Rc

White - W2 to W2 (aet as AUX heat)

Blue - C to C

Brown - E to * (set as emergency heat)

[MotorBikeMike]

Thank you.

1. Is W2 set as aux heat by default in nest or do I need to make some adjustment.

2. is * set as emergency heat by default in next or is there an adjustment that I need to make.

Thank you.

[MotorBikeMike]

@Patrick_Caezza 

Thank you.

1. Is W2 set as aux heat by default on the nest thermostat or do I need to make adjustment in the setup software.

2. is * set as emergency heat by default in next or is there an adjustment that I need to make.

Thank you.

[Patrick_Caezza · Accepted solution]

@MotorBikeMike 

As you are setting it up, it will ask you to verify those terminals.

[Jenelyn_O]

Hi there,

Thanks for posting in the Google Nest Community forum. I hope you get the answer you're looking for. Please let us know if you still need help, as I'll be willing to assist you further.

I appreciate your help, @Patrick_Caezza.

Best,

Jenelyn

[MotorBikeMike]

The Nest unit seems to be working fine thanks to 

 @Patrick_Caezza.

Cheers,

Mike

[zoeuvre]

Hi MotorBikeMike,
 

As we got our resolution here, I'm going to mark this thread as complete. I'll be locking this thread if we won't hear back from you again in 24 hours. Should that happen, feel free to create a new one if you have more questions or have other concerns in the future. 

All thanks for your help, @Patrick_Caezza and Jenelyn. 
 

Cheers,

Zoe