Emerson Sensi Smart Thermostat Pro Installation Guide

PRO Installation

Thermostat

Smart

There are a lot of choices when it comes to buying a thermostat, but only one combines 125 years of experience and the latest connected home technology to empower your customers to take control of their comfort from anywhere. We proudly connect you to a professional-grade thermostat that you can offer your customers with confidence and that will keep you connected with them even after the initial install.

Sensi partner program

Always be the Contractor-On-Call with your customers. The Sensi app saves your contact information so when your customer needs service, you’re just a tap away. Register at

www.sensiregistration.com.

Need help?

Visit sensicomfort.com/support for around-the-clock access to support articles, instructional downloads and comprehensive support videos. Our highly-trained Sensi Support Team is available seven days a week.

1.888.605.7131 support@sensicomfort.com

Easy to install and connect

Sensi is designed to install like a standard thermostat. It gives you the flexibility to connect to Wi-Fi at installation or let your customer connect it later using the Sensi app.

MOBILE DEVICE COMPATIBILITY

OPERATING SYSTEM COMPATIBILITY

iOS Yes

Android Yes

Amazon Fire Yes

SMART HOME PLATFORM COMPATIBILITY

OPERATING SYSTEM COMPATIBILITY

Amazon Alexa Yes

Google Assistant Yes

Apple HomeKit

Wink Yes

Yes, but requires a common wire (c-wire)

HVAC SYSTEM COMPATIBILITY

SYSTEM TYPE COMPATIBILITY MODIFICATIONS

Conventional heating and cooling

• Gas furnace

• Air conditioner

• Electric furnace

• Boiler

Heat only

• Gas furnace

• Electric furnace

• Boiler

Cool only

• Air conditioner Heat pump Yes Requires a common

Communicating proprietary systems

Line voltage No Requires low voltage

Millivolt systems No Requires 20-30VAC

Yes None

Yes Requires a common

wire (c-wire)

Yes Requires a common

wire (c-wire)

No Needs standard HVAC wiring

(20-30VAC)

What’s in the box?

• Sensi Thermostat

• Screws and Anchors

• Wire Labels

• 2 AA Batteries

• Sensi Security Code

(found on the back of the Welcome Guide)

Items needed for Wi-Fi connection:

• The homeowners compatible iOS or Android device with the Sensi app installed and registered

• Your customer’s Wi-Fi network name (SSID) and password

QUICK TIP: Ask the homeowner to download the

Sensi app and gather their Wi-Fi information while you are installing the thermostat.

Installation

1. Install Sensi thermostat, referring to these terminal

definitions, cross references and wiring diagrams as needed:

OLD THERMOSTAT

RH RH

RC, R RC

SENSI THERMOSTAT

†

CONVENTIONAL SYSTEM

Power for heating, 24V

Power for cooling, 24V

HEAT PUMP SYSTEM

C, X, B** C Common wire, 24V

Y, Y1 Y 1st stage cool

Y2 Y2/*

W, W1, W/E, Aux/E, E

†††

W/E 1st indoor stage heat

W2/*

2nd stage cool or humidifier

2nd indoor stage heat or dehumidifier

1st outdoor stage heat

2nd outdoor stage heat and cool or humidifier

1st stage auxiliary/ emergency heat

2nd stage auxiliary/ emergency heat or dehumidifier

G G Indoor blower (fan)

O,B,†† O/B O/B

L L no function

†

Two transformer systems (separate RC and RH wires), clip internal jumper located

on back of Sensi above battery compartment.

††

Label “B” as “C” only if the old thermostat al so had a wire in “O”. If there is no wire

on “O”-label the wire “B”.

†††

On Heat Pump system with separate W2 and E wires, label both wires W/E

(2 wires in one terminal).

Changeover (reversing valve) connection for heat pump or zone panel systems

“L” terminal connection

SINGLE STAGE OR MULTI-STAGE SYSTEM (NO HEAT PUMP) WITH TWO TRANSFORMERS

Two transformers systems (separate RC and RH wires), clip internal RC/RH jumper, located on back of thermostat.

Energized

Blower

in Cool

Constantly

Circulator

Fan

Heat

Pump “L”

Mode

(Factory

Default)

Energized

On Call

For Cool

Terminal

Connection

Energized

(And Heat

If Conﬁ-

In Heat

Mode (Or

Constantly

gured

For Electric

Heat)

Aux Mode)

Dots Indicate

Phased

HOT

Relationship

NEUTRAL

120 VAC

24 VAC

NEUTRAL

HOT

Cooling TransformerHeating Transformer

Thermostat

Heat

Mode

Cool

24 Volt

1st Stage

Mode

1st stage

(Common)

Heat

(Hot)

Cool

(Hot)

Multi-

Stage

De-

humidiﬁer

Humidiﬁer

AC2

GA2

†

NEUTRAL

24 VAC

EL2

Dots Indicate

HOT

Phased

Relationship

HOT

120 VAC

NEUTRAL

Heat

Mode

2nd Stage

Cool

Mode

2nd Stage

†

EL1

AC1

GA1

Stage

Single

System

Conﬁguration

HEAT PUMP SYSTEMS

Common connection required on Heat-only, Cool-only or Heat Pump systems.

NEUTRAL

Energized

Blower/

Mode

in Cool

Constantly

Circulator

Fan

Heat

Pump “L”

(Factory

Default)

Energized

On Call

For Cool

Terminal

Connection

(And Heat If

In Heat

Energized

Constantly

Conﬁgured

For Electric

Heat)

Mode (Or

Aux Mode)

Dots Indicate

Phased

Relationship

HOT

120 VAC

24 VAC

NEUTRAL

HOT

Thermostat

††

†

System

Conﬁguration

Single

Heat

Mode

Cool

Mode

Heat And

Cool Mode

Heat

Stage

2nd Stage

1st Stage

Pump

(Com-

HP1

Heat

Mode

pressor)

24 Volt

(Hot)

24 Volt

(Hot)

24 Volt

1st Stage

NOTE: Dual

Fuel Option

(Common)

Heat

Cool

Multi-

De-

Humidiﬁer

Heat Mode

De-Energizes

Heat

Stage

humidiﬁer

1st Stage

HP2

Pump

Internal jumper between RC and RH, located on back of thermostat.

†

††

2. After installation, configure the thermostat to the appropriate system type. Press “Menu” on the thermostat and refer to these menu options as needed:

CONFIGURATION MENU ITEMS REFERENCE

Display Code

Fn Circulating Fan OFF Off/10% – 100% (5% increments) H AA Humidification

H SP Humidification

dH AA Dehumidification

dH SP Dehumidification

Menu item Default Options

Wireless Setup

Connects Thermostat to Wi-Fi network

Fahrenheit or Celsius F F

Outdoor Equipment Configuration

Cooling or heat pumps

Indoor Equipment Configuration

For Gas or Electric Heat

Reversing Valve Position Selects “O” or “B” Setting For Heat Pumps Only

Add Accessory

Set Point

Add Accessory

Set Point

Wireless Radio

Turns Wi-Fi Radio On/Off

— Connect

AC2 AC1 – Conventional Cooling 1

AC2– Conventional Cooling 2

HP1 – Heat Pump 1 (Single Stage) HP2– Heat Pump 2 (Two-Stage) AC0– No Cooling

EL2 EL1– Electric 1 (Single Stage)

EL2– Electric 2 (Two-Stage) FAn GA1 Gas 1 (Single Stage) GA2 Gas 2 (Two-Stage)

O O

B 2

OFF Off/On

OFF Off/5% – 50% (5% increments)

Od Od/Oc

Od – Optimal dehumidification

(Overcool to dehumidify)

Oc – Optimal comfort

(Wired dehumidification)

OFF Off/40% – 95% (5% increments)

ON Off/On

(Single Stage)

(Two-Stage)

3. Once the thermostat is installed and properly configured,

test the equipment by following these steps:

• Turn on power to the system.

• Fan Operation

• If your system does not have a “G” terminal

connection, skip to “Heating System” below.

• Press the “Fan” button on the thermostat and select the “On” position. The blower should begin to operate.

• Press the “Mode” button to turn off the system. Then press the “Fan” button on the thermostat and select the “Auto” position. The blower should stop immediately.

• Circulating Fan

• Press the “Menu” button on the thermostat and press

the “Next” button until you reach the “Fn” screen.

• Adjust the % run time from 10%-100% in 5% increments by using the arrow up or down buttons (default is OFF), then press “Exit”.

• The % run time is the percentage of time the fan shall run in a day. This calculation takes into account the amount of time the heating, cooling and continuous fan have run during the same day.

• Heating System

• Press the “Mode” button on the thermostat

and select the “Heat” position.

• Press the up arrow on the thermostat and adjust the setting to 1° above the current room temperature. The heating system should begin to operate and the thermostat will indicate “Heating” of “Heating Auxiliary” on the screen.

• For heat pumps with auxiliary, press the up arrow on the thermostat and adjust the setting to 3° above the current room temperature. The auxiliary heat should begin to operate and the thermostat will indicate “Heating Auxiliary” on the screen.

• Press the down arrow on the thermostat and adjust the setting to 1° below the current room temperature. The heating system should stop operating and “Heating” or “Heating Auxiliary” will disappear from the screen.

• Auxiliary System (only for heat pumps with auxiliary)

• Press the “Mode” button on the thermostat and

select the “Aux” position. This bypasses the heat pump and runs auxiliary-only heat.

• Press the up arrow on the thermostat and adjust the setting to 1° above the current room temperature. The auxiliary heating system should begin to operate and the thermostat will indicate “Heating Auxiliary” on the screen.

• Press the down arrow on the thermostat and adjust the setting to 1° below the current room temperature. The auxiliary heating system should stop operating and “Heating Auxiliary” will disappear from the screen.

• Cooling System

• Press the “Mode” button on the thermostat

and select the “Cool” position.

• Press the down arrow and adjust the setting to 1° below the current room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The thermostat will indicate “Cooling” on the screen. Note that there can be up to a 5 minute delay for this process. This is indicated by a flashing setpoint temperature.

• Press the up arrow and adjust the setting to 1° above the current room temperature. The cooling system should stop operating and “Cooling” will disappear from the screen.

• If you encounter any issues while testing the equipment, refer to the troubleshooting actions on page 17.

• Humidification

• Press the “Mode” button on the thermostat

and select the “Heat” position.

• Press the “Menu” button on the thermostat and press the “Next” button until you reach the “H SP” screen.

• Turn Humidification On by pressing either the Up or Down button until the humidity set point is higher than the current room humidity. Humidity can be adjusted from 5%-50% in 5% increments, then press “Exit”.

• Check to ensure humidifier is running.

• Press the down arrow on the thermostat and

adjust the setting to 1° below the current room temperature. The heating and humidification systems should both stop operating.

• Dehumidification

• Press the “Mode” button on the thermostat

and select the “Cool” position.

• Press the “Menu” button on the thermostat and press the “Next” button until you reach the “dH SP” screen.

• Turn Dehumidification On by pressing either the Up or Down button until the humidity setpoint is lower than the current room humidity. Humidity can be adjusted from 40% to 95% in 5% increments, then press “Exit”.

• Depending on installed equipment, check that the system fan speed has slowed, the dehumidifier is running, or the system cools up to 3° below temperature set point or until the humidity set point is reached.

• Press the up arrow and adjust the setting to 1° above the current room temperature. The cooling system and dehumidifier (if applicable) should both stop operating.

Troubleshooting

SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

No Heat/ No Cool/ No Fan (common problem)

No Heat 1. Thermostat not

1. Blown fuse or tripped circuit breaker

2. Furnace power

switch to OFF

3. Furnace blower

compartment door panel loose

4. Loose connection

to thermostat or system

set to Heat

2. Loose connection

to thermostat or system

3. Heating system

requires service or thermostat requires replacement

1. Replace fuse or reset breaker

2. Turn switch to ON

3. Replace door panel in proper position to engage safety interlock or door switch

4. Tighten connections

1. Set thermostat to Heat.

2. Verify thermostat and system wires are securely attached.

3. Diagnostic: Set Mode to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and “Heating” should appear on display. This sound indicates the thermostat is operating properly. If the thermostat does not click, try resetting the thermostat. If the thermostat does not click after being reset, contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, verify the heating system is operating correctly.

SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

No Cool 1. Thermostat not

Heat, Cool or Fan Runs Constantly

Thermostat Display & Thermometer Disagree

set to Cool

2. Loose connection to thermostat or system

3. Cooling system requires service or thermostat requires replacement

Possible short in wiring, thermostat, heat, cool or fan system

Thermostat display requires adjustment

1. Set thermostat to Cool.

2. Verify thermostat and system wires are securely attached.

3. Diagnostic: Set Mode to Cool and lower setpoint below room temperature. Same procedures as diagnostic for “No Heat” condition except set the thermostat to Cool and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling if the AC Protection feature is on.

Check each wire connection to verify they are not shorted or touching other wires. Try resetting the thermostat.

Display can be adjusted +/-5° using the Temperature Offset in Sensi app.

SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

Humidity Display & Hygrometer Disagree

Furnace (Air Conditioner) Cycles Too Fast or Slow

“ Call for

Service” appears on the screen

Fan turns on randomly

Humidity display requires adjustment

The location of the thermostat and/ or the size of the Heating System may be influencing the cycle rate

1. Heating or Cooling system is not able to heat/ cool the space to within 5 degrees of the setpoint within 2 hours

2. If “--” is displayed

for the Room Temperature, a replacement thermostat is needed

3. None of the

buttons operate on the thermostat

The fan has been set to run occasionally in the configuration menu

Display can be adjusted in 5% increments +/-25% using the Humidity Offset in the Sensi app.

Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently, but runs for a shorter time. If you would like to increase cycle time, choose Slow for the Cycle Rate in the Sensi app.

1. See corrective action for “No Heat” or “No Cool”

2. Replace thermostat

3. Make sure keypad lockout is

not turned on. If it’s OFF, try resetting the thermostat.

Reset: Turn the power to your system off, wait 5 seconds and turn it back on.

Enter the configuration menu and make sure the ‘Fn’ fan run time percentage is OFF.

Connecting Sensi to Wi-Fi

1. Ask the homeowner to download the free Sensi app onto their iOS or Android device.

2. Ask the homeowner to follow the prompts to create

an account.

3. Once the homeowner has logged in, ask to use their device to

connect the thermostat to the Wi-Fi.

QUICK TIP: You must have your customer’s Wi-Fi Network (SSID) and Password, along with the Sensi Security Code card to complete the wireless setup.

4. Select “Connect Thermostat to Wi-

Fi” and follow the in-app prompts to complete the connection steps.

5. Once the thermostat is connected

to Wi-Fi, enter your registered phone number by selecting “Contractor” from the drop down menu.

Warnings

INSTALLER INFORMATION

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERT Y DAMAGE.

WARNING: OUT OF PHASE TRANSFORMERS

On two transformer systems, the transformers MUST be in phase. Measure the voltage across RC and RH. If more than 12 Volts AC is present between RC and RH, then the transformers are NOT in phase.

To correct this condition, reverse the secondary low voltage connections at either the Heating or Cooling transformer.

To prevent electrical shock and/ or equipment damage, disconnect electric power to system at main circuit breaker box until installation is complete.

FOR CALIFORNIA RESIDENTS: WARNING:

This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm.

VOLTAGE REQUIREMENTS

Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.

Thermostat installation and all components of the c ontrol sys tem shall confor m to Class II circuits per t he NEC code.

CAUTION: E5 Alert

If “Call For Service” is displayed on your Sensi thermostat, and E4 or E5 appears where the room temperature should be displayed or the backlight is flashing, please call our support team immediately at 888.605.7131

ATTENTION: MERCURY NOTICE

This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury must not be discarded in household trash. Refer to thermostat- recycle.org for location to send product containing mercury.

For Your Customer

MAKE SURE TO LEAVE THE SENSI WELCOME GUIDE FOR YOUR CUSTOMER.

It provides helpful instructions and information on the following:

• Includes their Sensi Security Code for connecting to Wi-Fi

• How to connect their Sensi thermostat to Wi-Fi (if this has

not already been completed) or connect additional devices

• Key features of the thermostat and the app and how they work

• Customer Support

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Emerson Sensi Smart Thermostat Pro Installation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual