Installation Guide

1. Switch off power
This protects you and avoids blowing a fuse
in your equipment. Adjust the temperature
on your old thermostat to make sure your
system is off.
2. Remove cover
Some covers pop off, while others need
to be unscrewed.
CAUTION: Do not connect Nest
to high-voltage wires.
4. Remove any jumper wires
Jumper wires are short wires between two
connectors. You won’t need them. An R wire
can go into either RC or RH.
3. Check your system
If your old thermostat is labeled 120V or 240V
or has thick wires with wire nuts, your system
is high voltage. Not sure? Contact support.
Breaker box
Switch