Nest Thermostat E Manuale utente

Thermostat E

Installation Guide

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Compatibility

The Nest Thermostat E works with most 24V

systems, including forced air, variable speed,

heat pump and radiant systems, as well as

common fuel types such as natural gas,

electricity and oil.

It can control:

• Heating and cooling: one stage of heating

and cooling, and a second stage of either

heating or cooling

• Heat pumps: with auxiliary and

emergency heat

• Fans: one speed

You can check your system’s compatibility

at nest.com/ca/works

Professional installation is recommended for

dual fuel systems (heat pump with furnace).

Watch the video

To see an overview of how to install the Nest Thermostat,

visit support.nest.com/ca/thermostat-e

Don’t want to install your

Nest Thermostat yourself?

The Nest Thermostat is designed for DIY

installation, but you can also hire a Nest Pro

to do it for you. They’ll take care of installation

and make sure everything’s up and running.

Go to nest.com/ca/install to ﬁnd a Nest Pro

installer near you.

In the box

Display

Trim plate

Base

Wall screws

Breaker box System switch

1. Switch off power

This protects you and avoids blowing a fuse in your

equipment. To make sure the power is off, change

the temperature with your current thermostat

and wait at least ﬁve minutes to be sure that your

system doesn’t turn on.

2. Remove the cover

Some thermostat covers pop off, while others

need to be unscrewed. Older thermostats may

have a second plate that should also be removed

to expose the wires.

BOGYWAAC

NOT

USED

3. Take a picture of the wires

Take a picture of your thermostat’s wires and

save it for reference. Make sure you can read

the wire terminal labels.

IMPORTANT:If there are two labels on

your thermostat’s wire connectors, go

to nest.com/ca/labels for detailed help

and instructions.

Incompatible wiring and voltage

Stranded wires

Stranded wires aren’t compatible with the

Nest Thermostat.

High-voltage wires

If your thermostat is labeled 120V or 240V,

or has thick wires with wire nuts, or has

L1 and L2 terminal blocks, your system

is high voltage and isn’t compatible with

the Nest Thermostat.

If you haven’t already, go to nest.com/ca/works

and enter your thermostat’s wires into the

compatibility checker.

• Enter only the connectors on your

thermostat that have wires in them

• Do not use wire colors – enter the

connector labels

• Do not enter any jumper wires into

the checker (see step 5)

If your system is compatible, you’ll get a

custom wiring diagram that you will need

to install your Nest Thermostat. You can

print it or email it to yourself.

4. Use the compatibility checker

5. Remove any jumper wires

Jumper wires are short wires between two

connectors. The Nest Thermostat doesn’t

need jumpers. If your thermostat has jumpers,

remove them, but save them along with your

old thermostat.

IMPORTANT:If you have Rh and Rc wires, you have

a dual transformer system. The Nest Thermostat E

is not compatible with dual transformer systems,

but you may be able to use the 3rd generation Nest

Learning Thermostat.

6.Label the wires

Peel off the labels below and attach them

to the thermostat’s matching wires.

Note: If you have an Rc or Rh wire, put the

R label on it.

IMPORTANT:If you’re unsure about wiring

your thermostat, go to nest.com/ca/install

to contact a Nest Pro in your area.

Wiring tips

Wire colors can vary, but:

• Common or C wires are generally blue.

• If there’s an orange wire in the connector labeled both W and O/B,

then you likely have a heat pump. Put this wire in the Nest Thermostat’s

*O/B connector.

• If there’s a white wire in the connector labeled both W and O/B,

then you probably don’t have a heat pump. Put this wire in the Nest

Thermostat’s W connector.

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