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General specs

Terminal

Specification

Notes

L

230 V AC/50 Hz mains voltage

Live wire

N

230 V AC/50 Hz mains voltage

Neutral wire

1

Heating relay normally closed/satisfied

3 A resistive, 1 A inductive

2

Heating relay common

3 A resistive, 1 A inductive

3

Heating relay normally open/call for heat

3 A resistive, 1 A inductive

4

Hot water relay normally closed/satisfied

3 A resistive, 1 A inductive

5

Hot water relay common

3 A resistive, 1 A inductive

6

Hot water relay normally open/call for heat

3 A resistive, 1 A inductive

OT1

OpenTherm wire 1

42 V DC max.

OT2

OpenTherm wire 2

42 V DC max.

If using T1 and T2, connect to earth

T1

12 V DC power output to Nest

T2

12 V DC power output to Nest

Note: T1 and T2 have no polarity at the thermostat.
Maximum cable thickness = 2 mm²

AC power adaptor

Input: 100-240 V AC, 50/60 Hz, 0.2 A  |  Output: 5 V DC, 1.4 A

Heat Link

W

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in

g s

p

ec

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19

Summary of Contents for A0001

Page 1: ...Installation step by step Learning Thermostat Installation Guide ...

Page 2: ...e that your heating system is working Your system needs to be working and needs to conform to building and safety regulations before a Pro can start working Find the best place to install your Nest Thermostat Install the thermostat and Heat Link Connect your thermostat to Wi Fi or help you do it yourself Give you a quick product intro and demo If you ve already bought installation you can schedule...

Page 3: ...ox 5 Before you start 6 Installing the Heat Link 7 Installing the thermostat 12 on the wall 13 on the stand 14 Wiring diagrams 18 ErP class 26 Nest Labs Europe Ltd Limited Warranty 27 WARNING High voltage The Nest Thermostat should be installed by a professional ...

Page 4: ... Combi boilers System boilers with hot water control Heat pumps heating only Zoned systems District heating with electrical control valve Control systems On Off OpenTherm A Wi Fi connection is required to control the Nest Thermostat with the Nest app and to receive software updates Compatibility ...

Page 5: ...Installation step by step 5 Display Base Heat Link Screws Trim plate In the box ...

Page 6: ...age 12 Where should you install it Place it within 30 metres of the Heat Link Closer is generally better Walls and large objects between them can affect their communication range The Nest Thermostat should be in a room that s used often so that it can read the right temperature can sense when the home is empty and know when to automatically turn down the heating It should have a clear view of the ...

Page 7: ...t s important to install the Heat Link before the Nest Thermostat Do not connect the thermostat directly to your heating system High voltage current will irreparably damage the Nest Thermostat The Heat Link is necessary even if there are low voltage wires ...

Page 8: ... Heat Link 1 Switch off mains power You ll be working with mains voltage so protect yourself the heating system and the thermostat by turning off the power before you start Fuse box Switch CAUTION High voltage wires or ...

Page 9: ...unction box This will power the Heat Link Connect the heating control circuit to the Heat Link 1 normally closed satisfied 2 common 3 normally open call for heat as needed If the system has a hot water control circuit connect it to 4 normally closed satisfied 5 common 6 normally open call for heat as needed If you have an OpenTherm boiler connect its control circuit to the OT1 and OT2 terminals Se...

Page 10: ...s from the wire bundle that goes to the current thermostat and attach them to the T1 and T2 terminals on the Heat Link HEATING Call for heat normally open Common Satisfied normally closed 12 V DC power Earth OpenTherm 42 V DC max HOT WATER Call for heat normally open Common Satisfied normally closed 230V AC live and neutral input power Installing the Heat Link ...

Page 11: ... included to mount the Heat Link near the boiler or junction box Then put the Heat Link cover back on To help ensure a good wireless connection to the thermostat Leave at least 30 cm of space on each side Install it within 30 m of the thermostat Boiler Heat Link Thermostat 30 cm min 30 m max ...

Page 12: ... stand Choose this installation method if you re replacing a wireless thermostat or if the thermostat needs to be moved to a better position The Nest Stand is sold separately Go to nest com eu for more information Go to page 14 to start Existing thermostat wires With the stand you can put your thermostat on a desk shelf or other flat surface to Heat Link Installing the thermostat ...

Page 13: ...se first then screw them to the wall as one piece When installed on the wall the Nest Thermostat should be 1 2 1 5 m above the floor 6 Connect the wires Connect the wires coming through the wall to Nest s T1 and T2 terminals It doesn t matter which wire goes into which connector Continue to page 15 Installing it on the wall IMPORTANT Terminate and insulate all wires according to the regulations in...

Page 14: ... and plug it into a wall socket Stand mounted thermostats should be placed on a table or shelf 0 75 1 m above the floor and no further than 1 m from the edge IMPORTANT Make sure that you install the Heat Link before you install the Nest Thermostat NOTE The Nest Stand is sold separately and comes with its own installation instructions Go to nest com eu stand for more information ...

Page 15: ...step 15 Finishing installation and setup 8 Attach the display Press the thermostat display onto the base until it clicks into place Switch on mains power and the Nest Thermostat will begin setup or INSTALLING THE THERMOSTAT ...

Page 16: ...est com if you re using a computer If you need help please visit nest com eu pairing 9 Setup The Nest Thermostat will turn on and take you through setup You can select a language connect it to Wi Fi and tell it some things about your home and system so that it can help save energy The Nest Thermostat doesn t have a touch screen Turn the thermostat display and press it to select Finishing installat...

Page 17: ...ly start learning your schedule or you can choose a schedule with preset times and temperatures You can edit your schedule at any time For help with getting started learning about Nest Thermostat features energy saving tips and more please go to nest com eu thermostatbasics INSTALLING THE THERMOSTAT ...

Page 18: ...agrams show you how to install the Nest Thermostat on 230 V combi boilers page 20 Low voltage dry contact combi boilers page 21 S plan page 22 Y plan page 23 OpenTherm boiler page 24 District heating with electrical control valve page 25 ...

Page 19: ...ter relay normally closed satisfied 3 A resistive 1A inductive 5 Hot water relay common 3 A resistive 1A inductive 6 Hot water relay normally open call for heat 3 A resistive 1A inductive OT1 OpenTherm wire1 42 V DC max OT2 OpenTherm wire 2 42 V DC max If using T1 and T2 connect to earth T1 12 V DC power output to Nest T2 12 V DC power output to Nest Note T1 and T2 have no polarity at the thermost...

Page 20: ...230 V combi boiler L N Boiler 12 V 3 A 230 V AC 50 Hz N L 1 2 3 4 5 6 OT1 OT2 T1 T2 L N Input power 20 ...

Page 21: ...Low voltage dry contact combi boiler L N Boiler 12 V 3 A 230 V AC 50 Hz N L 1 2 3 4 5 6 OT1 OT2 T1 T2 A B Input power Wiring specs 21 ...

Page 22: ...S plan L N Hot water tank Boiler Heating valve Water valve 12 V 3 A 230 V AC 50 Hz N L 1 2 3 4 5 6 OT1 OT2 T1 T2 L N 1 Com GR BW O GR BW O Input power 22 ...

Page 23: ...Y plan L N Zone valve Hot water tank Boiler 12 V 3 A 230 V AC 50 Hz N L 1 2 3 4 5 6 OT1 OT2 T1 T2 W L N 2 1 Com GR BL O Input power Wiring specs 23 ...

Page 24: ...OpenTherm boiler L N OT boiler N L 1 2 3 4 5 6 OT1 OT2 T1 T2 OT1 OT2 Input power 12 V 3 A 230 V AC 50 Hz 24 ...

Page 25: ...District heating with electrical control valve L N District heating valve 12 V 3 A 230 V AC 50 Hz N L 1 2 3 4 5 6 OT1 OT2 T1 T2 L N Input power Wiring specs 25 ...

Page 26: ...hermostat installed in an On Off heating system IV TPI room thermostat for use with on off output heaters An electronic room thermostat that controls both thermostat cycle rate and in cycle on off ratio of the heater proportional to room temperature TPI control strategy reduces mean water temperature improves room temperature control accuracy and enhances system efficiency 2 Nest Learning Thermost...

Page 27: ...ied with this Product for any reason you may return it at your cost in its original condition within thirty 30 days of the original purchase and receive a full refund 3 WARRANTY CONDITIONS HOW TO GET SERVICE IF YOU WANT TO CLAIM UNDER THIS LIMITED WARRANTY Before making a claim under this Limited Warranty the owner of the Product must a notify Nest Labs of the intention to claim by visiting nest c...

Page 28: ... DISCRETION AND RISK YOU WILL BE SOLELY RESPONSIBLEFOR ANDNEST LABSANDITSAFFILIATEDISCLAIM ANY ANDALL LOSS LIABILITYORDAMAGES INCLUDINGTOYOUR WIRING FIXTURES ELECTRICITY HOME PRODUCT PRODUCT PERIPHERALS COMPUTER MOBILE DEVICE AND ALL OTHER ITEMS ANDPETS INYOURHOME RESULTINGFROMYOURUSE OF THE PRODUCTINFORMATION SERVICESORPRODUCT PRODUCT INFORMATIONPROVIDEDBYTHE SERVICESISNOTINTENDEDAS A SUBSTITUTEF...

Page 29: ...The full text of the EU DoC is available at the following Internet address nest com eu legal compliance red PRODUCT WIRELESS INFORMATION HU 2400 2483 5 MHz Wi Fi max 18 0 dBm BLE max 8 0 dBm 802 15 4 max 15 1 dBm 5150 5350 5470 5725 MHz Wi Fi max 14 8 dBm HL 2400 2483 5 MHz 802 15 4 max 12 5 dBm RF EXPOSURE INFORMATION MPE This device meets EU requirements and those of the International Commission...

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