topic Re: power adaptor where no c wire exists in Nest Thermostats

power adaptor where no c wire exists

Tomm2 — Tue, 02 May 2023 15:22:25 GMT

I am looking to connect a power adaptor to my Rinnai Mo90sn

Re: power adaptor where no c wire exists

Patrick_Caezza — Tue, 02 May 2023 23:27:10 GMT

@Tomm2

Where are you located?

In US/Canada or UK/Europe?

Re: power adaptor where no c wire exists

zoeuvre — Wed, 03 May 2023 20:32:01 GMT

Hi Tomm2,

Thanks for posting here in Community forum. Check out the available thermostats we have by clicking this link. You may also buy one from our third-party sellers. Also, here's an article to learn more about the Nest Power Connector.

I appreciate your help, @Patrick_Caezza.

Best,

Zoe

usage of nest power adaptor

Tomm2 — Sat, 06 May 2023 10:49:08 GMT

This is the response I received from Rinnai in regard to hooking up the nest power adapter any thoughts?

Hello Tom,

I cannot find any literature that approves of a power adapter to be connected to the M090SN boiler to operate a Nest thermostat. The thermostat terminals on the boiler terminal bar are what is referred to as a dry contact meaning there should be no voltage at those terminals. Any voltage applied to those terminals could potentially damage the boiler. The folks at Nest should be able to supply you with a few alternative ways to connect their thermostat to dry contact terminals without installing a power adapter connection on the Rinnai boiler.

Regards,

Rinnai

Dustin Creamer

Technical Support

103 International Drive

Peachtree City, GA 30269
Toll Free: 1-800-621-9419
rinnai.us

Re: power adaptor where no c wire exists

EmersonB — Sat, 06 May 2023 21:49:31 GMT

Hi everyone,

@Tomm2, I'm dropping by to ensure that everything is covered here. Were you able to read the information and check the link that Zoe has shared? In case you have an update, you know where to find us.

I appreciate the help, Patrick_Caezza and Zoe.

Regards,
Emerson

Re: power adaptor where no c wire exists

Tomm2 — Sat, 06 May 2023 23:31:42 GMT

I live in the US

Re: power adaptor where no c wire exists

Tomm2 — Sat, 06 May 2023 23:36:11 GMT

I had that article. I understand that I can run a wire from the AC but I was looking to use the new adapter but based on the response I received from Rannai I do not believe it is advisable. I was surprised that the article did not say it could be a problem.

Re: usage of nest power adaptor

Markjosephp — Sat, 13 May 2023 18:22:05 GMT

Hello Tomm2,

I've duplicated your thread in the main one here. You’ll receive all updates on this issue on the main thread, and we recommend updating and checking this thread when needed.

Regards,

Mark