2019 | Confidential and Proprietary | Do not distribute
This is your comprehensive guide to setting up and installing Nest thermostats.
Don’t have time to read through the steps? Go to the Additional Resources section to watch
the installation video.
If you are pre-drilling holes, use a 3/32”drill bit. If you are drilling into hard materials such as stone,
brick, concrete or marble, use a masonry drill bit and drill.
Step 1: Switch off the power
Step 2: Remove the cover of existing thermostat
Once you’re sure the power is off, remove the thermostat’s cover. Some pop off,
others need to be unscrewed.
Important: Take this opportunity to also take a picture of the current wiring.
Before exposing any wiring make sure power to the system is turned off. An
HVAC system can have multiple breakers so make sure to turn them all off.
To check that its off, change the temperature on the thermostat
appropriately for heating or cooling by 5 degrees and wait 5 minutes to see
if the system turns on.
Step 3: Check system and get a wiring diagram
Let’s confirm this setup is compatible for a Nest thermostat by visiting the
Here you will also get a customized wiring diagram to
show where to install the wires.
Incompatible wiring:
High voltage wires
If the thermostat is labeled 120V or 240V or has thick wires with wire
nuts, the system is high voltage and isn’t compatible with the Nest
thermostat. Do not connect the Nest thermostat to high-voltage
wires.
.
Stranded wires
Nest thermostats are not compatible with stranded wires. Do not
connect the Nest Thermostat to stranded wires.
Installation guide
Step by step
