Issues connecting Nest Thermostat 2nd Generation to ER-142-400

[thefrank503]

Hi, 

we are curently upgrading all of our thermostat in our warehouse to Nest Thermostat. but we are having problems trying to connect the NEST Thermostat to on this unit : 

• ER-142-400 : 16,500 cfm – 400,000 btu/hr

we are properly connecting the cables in the nest thermostat but when trying to turn on the heat it doesn't work and it only works when turning on the Fan. please find diagram for cables below. 

[Patrick_Caezza]

@thefrank503 

The picture of the wiring diagram is unreadable. Can you post a better one?

[thefrank503]

Hello @Patrick_Caezza , Thank you for looking at my post. hopefully the picture below have a better resolution. 

[zoeuvre]

Hi there, 
 

I’m sorry for the delay in responding, and I thank you for taking the time to contact us. Please send us a clear photo of your old thermostat wiring and how you wired it to your Nest Learning Thermostat. 

I'll look forward to your response.

Regards,
Zoe

[Princesss]

Hello folks,

We just want to check if you have seen our response posted above. Let us know if you have additional questions, otherwise we'll be locking the thread.
 

Best,

Princess

[Princesss]

Hello everyone, 

Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Google Nest devices and we'd be glad to assist you further.
 

Best,

Princess

[thefrank503]

Hello,

Please don't close this thread yet. I will provide the pictures tomorrow morning. thanks

[Princesss]

Hi thefrank503,

No worries, we'll keep this thread open for few more days and will wait for your update.

Best,

Princess

[Princesss]

Hi thefrank503,

How's it going? Have you seen our response posted above? Let us know if you have additional questions, otherwise we'll be locking the thread.

Best,

Princess

[Princesss]

Hi there,

Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Google Nest devices and we'd be glad to assist you further.
 

Best,

Princess