Emerson Sensi ST75 Bedienungsanleitung

PRO Installation

Touch Wi-Fi

Thermostat

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

Wink Yes

Amazon Alexa Yes

Apple HomeKit Yes

HVAC SYSTEM COMPATIBILITY

SYSTEM TYPE COMPATIBILITY MODIFICATIONS

Conventional heating and

cooling

•Gas furnace

•Air conditioner

•Electric furnace

•Boiler

Yes Requires a common

wire (c-wire)

Heat only

•Gas furnace

•Electric furnace

•Boiler

Yes Requires a common

wire (c-wire)

Cool only

•Air conditioner Yes Requires a common

wire (c-wire)

Heat pump Yes Requires a common

wire (c-wire)

Communicating

proprietary systems No Needs standard HVAC wiring

Line voltage No Requires low voltage

(20-30VAC)

Millivolt systems No Requires 20-30VAC

What’s in the box?

•Sensi Thermostat

•Screws and Anchors

•Wire Labels

•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

SENSI

THERMOSTAT

CONVENTIONAL

SYSTEM

HEAT PUMP

SYSTEM

RH RH* Power for heating, 24V

RC, R RC* Power for cooling, 24V

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

Y, Y1 Y 1st stage cool 1st outdoor

stage heat

Y2 Y2/* 2nd stage cool 2nd outdoor stage

heat and cool

W, W1, W/E,

Aux/E, E W/E 1st indoor

stage heat 1st stage axillary/

emergency heat

W2*** W2 2nd indoor

stage heat 2nd stage axillary/

emergency heat

G G Indoor blower (fan)

O,B,** O/B O/B Changeover (reversing valve) connection

for heat pump or zone panel systems

L L no function “L” terminal

connection

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

on backplate to the right of the terminals.

** Label “B” as “C” only if the old thermostat also 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).

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

System

Conﬁguration

Thermostat

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

HOT

120 VAC

NEUTRAL

HOT

120 VAC

NEUTRAL

24 VAC

HOT

NEUTRAL

24 VAC

HOT

Cooling Transformer

Heating Transformer

Dots Indicate

Phased

Relationship

Dots Indicate

Phased

Relationship

Single

Stage

AC1

GA1

EL1

24 Volt

(Hot)

Cool

24 Volt

(Hot)

Heat

24 Volt

(Common)

Cool

Mode

1st stage

Blower

Circulator

Fan

Energized

On Call

For Cool

(And Heat

If Conﬁ-

gured

For Electric

Heat)

Energized

Constantly

in Cool

Mode

(Factory

Default)

Energized

Constantly

In Heat

Mode (Or

Aux Mode)

Heat

Mode

1st Stage

Heat

Pump “L”

Terminal

Connection

Cool

Mode

2nd Stage

Output

Heat

Mode

2nd Stage

Output

Multi-

Stage

AC2

GA2

EL2

HEAT PUMP SYSTEMS

System

Conﬁguration

Thermostat

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

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

HOT

120 VAC

NEUTRAL

24 VAC

HOT

Dots Indicate

Phased

Relationship

Single

Stage

Heat

Pump

HP1 24 Volt

(Hot)

Cool

24 Volt

(Hot)

Heat

24 Volt

(Common)

Heat And

Cool Mode

1st Stage

(Com-

pressor)

NOTE: Dual

Fuel Option

De-Energizes

Heat Mode

1st Stage

Blower/

Circulator

Fan

Energized

On Call

For Cool

(And Heat If

Conﬁgured

For Electric

Heat)

Energized

Constantly

in Cool

Mode

(Factory

Default)

Energized

Constantly

In Heat

Mode (Or

Aux Mode)

Heat

Mode

1st Stage

Heat

Pump “L”

Terminal

Connection

Cool

Mode

2nd Stage

Output

Heat

Mode

2nd Stage

Output

Multi-

Stage

Heat

Pump

HP2

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

No. Menu item Default Options

1Screen Brightness Off Adjust resting state brightness

with an option to turn off

2Nightlight Off Off / On

3Home Screen Content On

°F

Indoor Humidity

Time of Day

°F / °C

4Schedule - 5 / 2 Day Schedule

5Wi-Fi O Connect to Wi-Fi

6 Time Setup - Set the date and time

7About Thermostat Model Number / Reset

8Setup HVAC AC2 / EL2

AC2

EL2

Outdoor Setup AC1/

AC2/HP1/HP2/AC0

Indoor Setup GA1/

GA2/EL1/EL2/Fan

Reversing Valve Position O/B/3

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.

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