Emerson ST55, 1F87U-42WF User Manual

SENSITM SMART THERMOSTAT

Manual Operation

Models: 1F87U-42WF, ST55
Version: January 2020

©2020 Emerson Electric Co. All rights reserved

R-5029.

Table of Contents

Buttons and Icons 3

Basic Functionality 4

Manual Settings 6

Menu Configurations 8

Wiring Terminals 9

Back of the Face Plate 10

Sensi Smart Thermostat | MANUAL OPERATION GUIDE 2

BUTTONS AND ICONS

The Sensi Smart Thermostat can be operated through Wi-Fi using the Sensi app or it can be operated at the actual wall
unit. Advanced features such as thermostat settings, scheduling and email alerts are only available through the Sensi app.

WIFI STATUS ICON

Indicates Wi-Fi connection status.
When you turn Wireless Off on
the thermostat, this is blank.

BACKLIGHT BUTTON

Illuminates the thermostat for 10 seconds

UP ARROW BUTTON

Adjusts the temperature set point
or thermostat configuration.

CURRENT SET TEMPERATURE

Current set temperature the
thermostat will maintain.

SCHEDULE BUTTON

Toggles the schedule On or Off.

(The thermostat runs a program
based on time and temperature set
points when Schedule is On).

FAN BUTTON

Switches fan mode from Auto

TIME

Displays current time.

KEYPAD LOCKOUT ICON

This icon indicates the thermostat
is locked out. No changes can be
made at the thermostat. (Can only

be enabled from the Sensi app).

BATTERY ICON

MENU BUTTON

Access thermostat configurations.
(See page 6 for more details).

DOWN ARROW BUTTON

Adjusts the temperature set point
or thermostat configuration.

CURRENT ROOM TEMPERATURE

The room temperature at the thermostat.

or On. Leave the fan mode on
Auto to allow the thermostat to
control the fan as necessary.

MODE BUTTON

Switches system mode between Heat,
Cool, Off or Aux. (Auto Mode is only
available using the Sensi app).

When the bars get low, remember to
change the 2 AA Alkaline batteries in
the back of the thermostat face plate.

Sensi Smart Thermostat | MANUAL OPERATION GUIDE 3