Installation Manual
Installation Overview
1. Confirm system compatibility
Before opening the Nest Thermostat package, check all of the wires connected to the current thermostat
against the list of available connectors on the Nest Thermostat box, or use the Compatibility Checker at
http://nest.com/works to show you exactly where to connect each wire.
2. Briefly test the HVAC system
Test the heating, cooling, fan and other system features with the current thermostat before installing the
Nest thermostat so you can address any existing issues.
At times, outdoor weather conditions may prohibit testing of heating or cooling. In those cases, inform
the customer that you cannot test and ask the customer about the system's operation and performance.
3. Turn off power to the HVAC system
Turn off the power to the system to protect yourself and the equipment. Locate the circuit box and check
to see if the circuits are labeled or if there is a circuit directory. Turn off all HVAC system circuits.
If you cannot determine which circuits belong to the HVAC system turn off the main circuit breaker after
obtaining permission from your customer. Confirm the power is off by attempting to activate the HVAC
system using the existing thermostat.
4. Remove the old thermostat
Before removing the old thermostat, take a quick picture of the wiring with your phone in case you need
it for reference. Disconnect the wiring and remove the old thermostat. Use the wire labels included in
Nest Thermostat Installation Guide if needed. Be sure to leave the original thermostat, hardware and any
jumper wires with the customer.
5. Offer the customer installation finishing options
You may need to cover up holes, old paint or marks left by the old thermostat. Ask your customer if they
prefer to repair the wall themselves or if they want to have the Nest trim plate installed. Let the customer
know that the trim plate can be painted to match the wall.
6. Install the Nest Thermostat
Run the wires through the center of the Nest Thermostat base and attach it to the wall using the screws
provided. Do not use a power drill on the screws. Over tightening the screws can damage the circuitry in
the Nest base. For paneling, plaster-and-lath, or if there is a stud behind the thermostat, pre-drill a hole
using a 3/32” bit first.
Use the built-in level for proper alignment. Trim or re-strip any wires as necessary and connect them to
their corresponding terminals on the base. Make sure the wire is straight and the connector button
stays down after inserting it.
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