Wiring to new Boiler

[TJ Anderson]

They are still on/off switches though, they can't ramp, only a boiler specific control on a modulating boiler can do that. I could save 30% on your heating bill if you have a standard boiler and gave me access to your standard programmer. It would run it for less time and you would go colder though lol

 

[davesparks]

They are still on/off switches though, they can't ramp, only a boiler specific control on a modulating boiler can do that. I could save 30% on your heating bill if you have a standard boiler and gave me access to your standard programmer. It would run it for less time and you would go colder though lol

The nest can operate on the open therm protocol and connect to a modulating boiler or any other heat source that way and achieve the better efficiency


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[TJ Anderson]

The nest can operate on the open therm protocol and connect to a modulating boiler or any other heat source that way and achieve the better efficiency


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I have a 30CDI with FW100 controller / stat plus external stat. This provides weather and load compensation. It is a 2 wire connection with power and signal CAN - BUS. How could a Nest achieve this on this boiler?

 

[Swcfisher]

I have a 30CDI with FW100 controller / stat plus external stat. This provides weather and load compensation. It is a 2 wire connection with power and signal CAN - BUS. How could a Nest achieve this on this boiler?

Use the opentherm connection on the nest...

 

[davesparks]

I have a 30CDI with FW100 controller / stat plus external stat. This provides weather and load compensation. It is a 2 wire connection with power and signal CAN - BUS. How could a Nest achieve this on this boiler?

I don't know if your particular boiler supports open therm.

But the opentherm protocol is a two wire data link which is intended to allow all parts of a heating system to communicate intelligently. So it would be basically the same as the setup you have currently but using a nest and the weather data comes from the online service


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[Tof99]

As mentioned,they utilise Opentherm protocol, this communicates directly with the boiler's CPU.
Smart stats also calculate the 'time to heat', by considering external weather and the time the boiler takes to get to temp on previous occasions, this is where a significant saving is made.
Also by utilising geo-location, this gives extra control or can control on behalf of the user. ie, knows when the user will be home, by utilising geo-location and traffic monitoring; in theory the heating will be at temp when you walk through the door.