Nest suggesting to connect R into RH, yet Pro Setup documentation says

Rh Vs Rc Nest. Nest Red Wire To Rc Or Rh Uploadard If you have an Rh and an Rc wire, the Rh wire is the power wire for your heating system In this article, we'll look at why most modern thermostats have RC and RH terminals and some (mostly older) thermostats have only one terminal which is marked "R" and how they work

A Nest Learning Thermostat will automatically use this internal jumper if your system needs it R, Rh, Rc: Your system may have just an R wire, an Rh and an Rc wire, or a lone Rh or Rc wire

Nest 3 Generation Wiring Diagram Rc And Rh

Ultimately, the decision to wire RC and RH separately or use a shared R or Rh terminal depends on your specific HVAC system and its compatibility with your Nest thermostat model Therefore, the red t-stat wire is present at the terminal for such thermostats It's important to consult the thermostat manufacturer's instructions, follow the recommended wiring configuration, and seek professional assistance if needed to.

What Is RC and RH on a Nest Thermostat CitizenSide. The Nest Thermostat E only has an R connector, which is typically where an R wire would go The RC terminal supplies the 24-volt cooling power, and the RH terminal is the 24-volt heating power supply

Nest Showing No RC/RH r/hvacadvice. If you just have an R wire, it's responsible for powering your entire HVAC system (through the use of a transformer) The RC terminal is for cooling-specific functions, while the RH terminal is for heating-specific functions