Can one Power Connector handle two Nest thermostats?

[HenryJ]

I have a gas-fired, heat only, forced hot water heating system with two zones and two Nest thermostats that don't have C wires.  Can I use a single Power Connector to handle both  Nest thermostats, or do I need two separate Power Connectors?  If one Power Connector can handle two thermostats, where can I find the right wiring diagram?

[Houptee]

Each Nest needs its own power connector.

The R and W go directly to the R W on the power connector.

Then the wiring at the boiler is different depending on if you have 2 zone valves, or if you have 2 switching relays that control 2 circulators. Post pics of the wiring at the boiler to determine where you will connect the C wire at the boiler for the power connectors.

Or if you can pull new 5 conductor thermostat wire to each Nest then you don't need the power adapters.

This has all the info about the power connector.

https://support.google.com/googlenest/answer/10523126?hl=en

[HenryJ]

OK, thank you.  This case can be closed.

[aatienza]

Hy HenryJ,

That's great to hear! Let us know if you have other questions as I'll be locking the thread after 24 hours.

Thanks,

Archie