nest Learning thermostat Installation And Configuration Manual
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nest Learning thermostat Installation And Configuration Manual

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Nest Learning Thermostat
Pro installation & configuration guide
Need help?
•
Help online: http://support.nest.com/certified
•
Nest Certified Professional support: 1-855-VIP-NEST (1-855-847-6378)
•
Hours: 5am-9pm (pacific), 8am-midnight (eastern).
Last updated: April 17, 2013
Version: 2.0

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  • Page 1 Nest Learning Thermostat Pro installation & configuration guide Need help? • Help online: http://support.nest.com/certified • Nest Certified Professional support: 1-855-VIP-NEST (1-855-847-6378) • Hours: 5am-9pm (pacific), 8am-midnight (eastern). Last updated: April 17, 2013 Version: 2.0...

  • Page 2: Table Of Contents

    Table of Contents Installation overview What’s different about installing Nest Installation check-list Installation details Technical specifications Supported wiring Wiring diagrams: Conventional Systems Wiring diagrams: Heat Pump Systems Wiring diagrams: Humidifiers and Dehumidifiers Configuring Nest with Pro Setup What is Pro Setup?

  • Page 3: Installation Overview

    Determine wiring compatibility before opening Nest packaging.   Just a simple test: would all the wires on the current thermostat have a home on Nest’s base?   Take off the cover of the old thermostat and look at the wires. Check them against the list of available connectors on the box or visit nest.com/works.

  • Page 4: Installation Details

    Test heating and cooling for two minutes each. This is vital to any installation. After setting up Nest, you need to run each part of the system for a few minutes. This will ensure that Nest’s installed correctly and there aren’t any HVAC compatibility issues.
  • Page 5 Secure: AES-128 , SSL/TLS, WEP, WPA/WPA2 * Nest may need a common wire if Nest can’t get the voltage it needs from standard HVAC wiring without interfering with normal HVAC operation. This occurs most often in certain zoned systems. Get more info in the troubleshooting section, starting on page 28.

  • Page 6: Technical Specifications

    No common wire required with most installations installations 24 bit color 24 bit color Display 320 x 320 pixel display 320 x 320 pixel display 1.75" diameter 1.75" diameter Language English English Spanish Spanish French French Nest Learning Thermostat installation & configuration guide Page 4...
  • Page 7 2.5 minute minimum delay between Lockout compressor cycles compressor cycles Outdoor Temp Nest utilizes local weather data over Wi-Fi in Nest utilizes local weather data over Wi-Fi in Sensors place of outdoor temperature sensors place of outdoor temperature sensors Nest Learning Thermostat installation & configuration guide...

  • Page 8: Supported Wiring

    24VAC power from transformer* * No jumper wires required. You don’t need to hang on to any old jumper wires going from Rh (sometimes just called R) to Rc. Nest will automatically jump these two connectors. Nest Learning Thermostat installation & configuration guide...
  • Page 9 24VAC power from cooling transformer* * No jumper wires required. You don’t need to hang on to any old jumper wires going from Rh (sometimes just called R) to Rc. Nest will automatically jump these two connectors. Nest Learning Thermostat installation & configuration guide...

  • Page 10: Wiring Diagrams: Conventional Systems

    24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.
  • Page 11 24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.
  • Page 12 24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.
  • Page 13 24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.

  • Page 14: Wiring Diagrams: Heat Pump Systems

    24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.

  • Page 15: 2 Stage Heat Pump

    24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.

  • Page 16: 2 Stage Heat Pump (Aux/Emergency Heat)

    24VAC power from heating transformer ‡ * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. * Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating.

  • Page 17: Wiring Diagrams: Humidifiers And Dehumidifiers

    24VAC relay suitable for HVAC equipment use. Consult humidifier/dehumidifier installation manual for wiring requirements. Important Note: In dual transformer set ups (where there is both an Rh and an Rc wire connected to Nest), Nest will power the * connector from the Rh wire.

  • Page 18: Possible Configurations

    • Install the 2 hum wires directly into the relay. • Run the single wire from the relay to the * terminal at Nest. • Nest recommends the White Rogers 90-290Q or similar 24VAC HVAC relay. Nest Learning Thermostat installation & configuration guide...
  • Page 19 • This system has a humidifier built in to its HVAC system and only 1 hum wire. • Connect the hum wire from the built-in system directly to the * terminal at the Nest. • No relay is recommended. Nest Learning Thermostat installation & configuration guide...

  • Page 20: Configuring Nest With Pro Setup

    Pro Setup. How do I enter Pro Setup? During setup on a Nest Learning Thermostat, you’ll be asked if you’re a homeowner or a professional. If you answer “professional,” you’ll receive Pro Setup options.

  • Page 21: How Do You Configure Special Systems

    However, you can turn the ring and select DONE at any time to exit Pro Setup without making any changes. How do you configure special systems? Below are examples of how to configure a Nest Learning Thermostat to control some of the more complex heating and cooling systems. Dual Fuel Systems...
  • Page 22 The 2nd generation Nest Learning Thermostat will use System Match to recognize your system as a two-stage heat pump if you’ve connected Y1, Y2, and O/B wires. Nest assumes that your Y1 wire will be used to activate 1st stage heating and cooling for your heat pump.

  • Page 23: How To Quick Reference Guide

    As an example, if it’s a heat only system, Nest won’t show any cooling options. If it’s a heat pump, Nest will know and do a special test to check the orientation of the O/B wire.
  • Page 24 Heat Pump: Both auxiliary and compressor lockout temperatures can be changed in the Heat Pump section of the Advanced Settings menu. By default, Nest will lock out the Setting compressor and auxiliary heater when the outdoor temperature is above 50°F but will not lock out auxiliary lockout temperatures the compressor at any temperature.
  • Page 25 COOL TO temperature. Press the ring again when done. Adjust Safety Temperatures No matter the schedule, Nest will never let the home go above or below the safety temperatures. To adjust them, follow these steps: 1. Press the ring to bring up the menu.

  • Page 26: Wiring Error Quick Reference Guide

    When Nest senses what wires have been connected to its base, it automatically configures its software for the system type it detects. If it’s a heat only system, Nest won’t show any cooling options. If it’s a heat pump, Nest will know—and do a special test to check the orientation of the O/B wire.
  • Page 27 Y2 wire without Y1wire. Your Nest is physically detecting a Y2 wire but not a Y1 wire that is required for 2 stage conventional cooling systems or 2 stage heat pumps. W3 wire without W2/AUX Your Nest is physically detecting a * (W3) wire but not a W2/AUX wire wire.
  • Page 28 Error number Description What’s going on? Your Nest may have Your Nest either has wires that aren't fully inserted into the tripped an internal fuse connectors or has tripped an internal fuse. and Nest needs to be replaced. Power wire Rc detected.
  • Page 29 Failed to connect. Nest is connected to your wireless network but not to the internet. Important Note: These errors may change with future software updates. Visit nest.com/support for the latest information. Nest Learning Thermostat installation & configuration guide Page 27...

  • Page 30: Troubleshooting

    This is a simple issue to address: 1. If you’re installing Nest to control a heat pump system and the old thermostat has both an B and a C, connect to B to Nest’s O/B connector and connect the C to Nest’s C connector.
  • Page 31 (“C”) wire installed? While we find that in the vast majority of homes Nest can charge its built in battery power sharing from the regular heating and cooling wires, a few installations require a common wire to bring power to Nest without interfering with the normal operation of the heating and cooling system.
  • Page 32 The heat call is detected by the controller board when the W wire is shorted to the R wire, which causes the 24V AC voltage to be detected. When the Nest thermostat is taking power, a small voltage is generated between W and C (typically less than 8 volts) which can cause a false heat call in a small number of systems.

  • Page 33: Quick Troubleshooting Reference Guide

    • The thermostat needs to be reconfigured. Nest doesn’t turn The power was never turned Nest doesn’t turn on until it senses both the that on after back on. wires are hooked up and power is coming to those installation.
  • Page 34 Nest Fi network is online. when they use one servers can’t communicate with If it is, check the Nest system status in the upper of the Nest apps. the device. This may happen if: right of nest.com/support. Nest will publish •...

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