Nest Thermostat Installation Manual

Nest Learning Thermostat

™

Installation Guide

Installation step-by-step

Contents

Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

In the box

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Before you start

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Choose an installation method

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Replacing an existing wired thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installing the Nest Thermostat in a new spot

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Cable diagrams

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Nest Labs (Europe) Ltd. LimitedWarranty NestLearningThermostat

™

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WARNING: High voltage. Nest should be installed by a professional.

WE TAKE YOUR PRIVACY SERIOUSLY

We’re committed to being open and honest about how we use data. We will always ask for permission before sharing your personally identiﬁable information such as your email address. We also keep your data safe with industry-standard security tools. To learn more about our Privacy Policy, please go to nest.com/eu/privacy.

The Nest Learning Thermostat is compatible with almost all central heatingsystems, including:

• Combi and condensing boilers

• System and heat-only boilers

• Hydronic underﬂoor systems

• Air source and ground source heat pumps (heating only)

• Zoned systems (one Nest Thermostat per zone)

• Switched live systems

• Low-voltage (dry contact) systems

Compatibility

You don’t need Wi-Fi to use the Nest Thermostat, but Wi-Fi is required to control Nest from theNest app.

Installation step-by-step

Display

Screws Welcome Guide, Installation

Guide and Warranty

Base Heat Link

Trim plate

N L T1 T21 2 3

Power cord ClipsPower plug

In the box

For installations in a new spot only

Before you start

→ On the next page, you’ll see options for switching out an

existing thermostat or installing in a new spot.

Do I need to install the Nest Thermostat somewhere new?

Many existing wired thermostats are in rooms that are rarely used. Thetemperature they sense is warmer or cooler than homeowners feel.

So if the old thermostat isn’t in a good spot, install Nest somewhere new usingthe included power plug and cord, or using the Stand for Nest Learning Thermostat (sold separately).

The Nest Thermostat shouldbe:

• Installed so that it can communicate wirelessly with Heat Link (up to a maximum distance of 30m). The home’s construction and arrangement will affect the communication range

• In a room that’s used often, so Nest can read the right temperature and the homeowner can easily reach it

• On an interior wall

• Away from drafts

• 1.2 – 1.5m from the ﬂoor

• Not behind doors, bookcases orotherobjects

• If in a zoned system, near the radiator that it’s controlling

Installation step-by-step

Existing thermostat cables

Heat

Link

→ Jump to page 8

Choose this installation method if the current thermostat connects to heating cables in the wall and it doesn’t need to move to a better spot.

Replacing an existing wired thermostat

Install over a socket and power with the provided cord and plug.

Connect to the Stand for the Nest Learning Thermostat and place on a desk, shelf or other ﬂat surface.

NOTE:

The stand is sold separately and comes with its own Installation Guide. More info at nest.com/eu.

Installing the Nest Thermostat in a new spot

→ Jump to page 20

Choose this installation if there’s a wireless thermostat, no thermostat at all or a thermostat that needsto be moved to a better spot.

Installation step-by-step

Heat

Link

Replacing an existing wired thermostat

To replace an existing wired thermostat, you’ll need to:

1. Install the Heat Link ﬁrst

2. Remove or conﬁgure the programmer

3. Install the Nest Thermostat

Fuse box

Switch

CAUTION: High voltage cables

1. Switch off mains power

You’ll be working with high voltage cables, so protect yourself and the thermostat by turning off the power before you start.

Install Heat Link

Installation step-by-step

REPLACE A THERMOSTAT

Install Heat Link

2. Understand the cables

Find the call-for-heat circuit in the heating system.

The circuit may run directly from the thermostat to the boiler or pass through a junction box.

If there’s a combi boiler with no junction box, the Heat Link will be connected directly to the boiler’s control circuit.

You may need to test each cable to understand its function.

Make sure you connect the correct cables to the Heat Link to avoid blowing a fuse.

Boiler

Heat Link Thermostat

30cm

min.

30m

max.

Install Heat Link

3. Choose where you’ll install the Heat Link

The Heat Link and Nest Thermostat communicate wirelessly, even if they are also connected by cables. Positionthe Heat Link such that large metal objects—like the boiler or hot water tank—don’t come between it and the thermostat. Metal objects can block thewirelesssignal.

Installation step-by-step

REPLACE A THERMOSTAT

Junction box

Boiler

Heat Link

Install Heat Link

4. Run power to the Heat Link

Use a cable to connect the L (live) and N(neutral) connectors on the Heat Link to the L and N connectors on the boiler or junction box. This will power the HeatLink.

If existing controls operate at mains voltage, you can add a jumper cable between live and common. The jumper cable should be 0.75mm

and 55mm long (with 8mm of exposed cable at eachend).

WARNING:

DO NOT SKIP It’s important to install the Heat Link before the Nest Thermostat. Otherwise, high voltage current will irreparably damage the Nest Thermostat.

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