Done the relay is assuming you have a high voltage system but the name millivolt is self explanatory there is no high voltage.
Nest high voltage conversion.
It is possible to convert to a low voltage system if you have a high voltage system but it s pretty involved and takes a bit of know how so.
High voltage thermostats are often built into the wall and typically have two to four thick wires coming out of the thermostat.
You ve probably heard the term low voltage or 24v while researching smart thermostats but if you re early in your research you might not yet know the difference the difference is critical.
Today s best known smart thermostats from manufacturers like ecobee nest and honeywell are desig.
A typical high voltage thermostat with 2 4 black and red wires.
I don t see the need for the relay.
Wire nuts are often used to connect the thermostat to the system wires.
A typical low voltage thermostat with multiple small wires in different colors.
I enjoy my work and these type of gadgets intrigue me.
I m installing a nest gen 2 thermostat in my eichler and am using a honeywell relay ra89a to convert from high voltage to low voltage.
I m wondering if i can place the relay right behind the thermostat and if this would cause any issues.
I ll post the diy photos as soon as i complete this project.
It learns your habits and is controllable using smartphone applications when situations arise and you need to change the settings.
I have a millivolt system and i connected it to the nest with a 24vdc source like you mentioned.
The 2018 nest learning thermostat 3rd generation is not only compatible with high voltage systems but it works as your best friend who is an agoraphobe and never leaves the house.
In some cases it is possible to make a high voltage system nest.
Nest thermostat high voltage hack installation high voltage conversion i am a licensed electrician that specializes in commercial building automation lighting controls fire alarm and security systems.