Emerson 1F87U-42WF Installation Manual

Sensi™

Smart Thermostat

1F87U-42WF Installation Training

• Home comfort control - Anytime.

Anywhere.

• Intuitive app and hardware design -

validated by research and reviews

• Traditional look that covers 90% of

existing thermostat footprints

• Extensive compatibility: heat, cool,

heat pump, dual fuel

• No c-wire required in most cases (except

HomeKit)

• Remote app control

• Auto changeover

• Large backlit display

• Humidity control

• Usage reports in-app for

heating, cooling and fan run
time

• Contractor branding on

device and in-app

• Popular smart home platform

integrations - Amazon Alexa, Google
Assistant, Apple HomeKit,
SmartThings and Wink

• Geofencing smart feature and flexible

scheduling options for energy savings

• Multi thermostat control capable for

light commercial applications

Overview Features

Sensi Smart Thermostat – Best Value

3

THERMOSTAT FEATURE

MSRP

$169 $129

Aesthetics

Modern / Simple /

Sleek

Traditional /

Approachable

Interface

Capacitive

Touchscreen

Buttons

System Type

Universal 4H/2C Universal 4H/2C

Contractor branding

App only Device & App

C-Wire

Required

Yes No

Humidity Control

Dual Fuel

Smart Feature -

Geofencing

Keypad Lockout

Sensi Smart Thermostat Comparison

4

Compatibility and common wire

(c-wire) requirement

No common wire

required

• Conventional heating

and cooling systems

Common wire required

• Apple HomeKit

• Heat only or Cool

only (2 wire)

• Heat pumps

Not compatible

• Millivolt systems

*External 24 VAC Transformer
is an option

• Communicating

systems

• Line voltage systems

• Accessory control

55

Terminal outputs

The common wire could be labeled “C”, “B” or “X” on the old thermostat. Please refer to

the owner’s manual of the old thermostat.

6

What if I don’t have a common wire and need one?

There are a few options if the application does not have or will not allow the
pulling of a common wire (c-wire) through the wall.

1. Look for an unused wire in the thermostat cable bundle

– Video: Using an extra, unused wire as a common wire

2. Use the “G” (Fan wire)

– Video: Using a g-wire (fan wire) as a common wire

3. Install an Emerson Thermostat Common Wire Kit

– Video: Using an Emerson Thermostat Common Wire Kit