Lennox S40 Smart Thermostat System User Guide
- June 9, 2024
- Lennox
Table of Contents
S40 Smart Thermostat Installer
508295-01 October 2022
Quick Start Guide
Step 1: Running Wires and Installing Sub-base
A. Use sub-base as a template to mark the desired mounting hole locations
on the wall. Drill holes and use provided wall anchors if needed.
B. Pull about three inches (75mm) of thermostat wire through the opening
and remove the outer thermostat wire jacket.
IMPORTANT: Seal wire hole in wall to prevent cold or hot air from
affecting the internal temperature sensor of the thermostat.
WARNING
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life.
Installation and service must be performed by a licensed professional HVAC
installer (or equivalent) or a service agency.
Step 2: Wiring Connections
NOTE: For basic communicating wiring Options 2 and 3 and different
equipment configurations, please reference the Lennox S40 Smart Thermostat
Installation and Setup Guide.
Indoor Unit Communicating Control
(Using Non-Shielded Wiring)
Step 3: Attaching Thermostat to Sub-base
A. Hold the thermostat by the edges, line it up with the sub-base
(horizontal position) and move the thermostat toward the sub-base.
B. Center the cavity on the back of the display over the sub-base.
C. Gently press on the edges of the thermostat until you hear the
mounting snaps engage. Be careful not to apply force directly on the glass.
D. Once the thermostat is connected, it may take up to 45 seconds for it
to power up.
NOTE: If the thermostat is removed from the sub-base, the thermostat will
shut down and will not be able to communicate with the system.
NOTE: Do not remove the label covering the thermostat screen until after
power is applied to the system.
Step 4: Commissioning using the Lennox® S40 Smart Thermostat
Welcome
Shows welcome screen. Error will show if the thermostat is not connected
properly. Select Language.
Select method to setup
Select continue setup process through the thermostat.
Dealer Info
IMPORTANT
Enter dealer ID number. If not available, enter phone number associated with
the dealer account. This will enable ability to do advanced diagnostics and
remote sharing, if permitted by homeowner.
General Information
Set time, date, language and temperature (Fahrenheit or Celsius).
Equipment Found
Automatically detects communicating equipment and equipment interface
module (EIM) if present. Non-Communicating equipment is added in this screen.
Smart Zoning may appear after this screen if installed along with airflow per
zone screen.
Reminders
Specify reminder types and reminder frequency (ex: change filter every 3
months).
Commissioning using the Lennox® Smart Technician App
- Thermostat will show welcome screen. Error will show if the thermostat is not connected properly. Select your desired language.
- Select Continue setup process through the Technician App to use the Lennox® Smart Technician App.
- The next screen is the QR codes for both IOS and Android If you have not already downloaded the app, here is an opportunity to do so now.
- Start the Technician app on your mobile device. The first screen to appear is the Welcome screen. Here you will select the desired language for the Lennox® Smart Technician App.
- Select Configure new system.
- Connect with Thermostat. Make sure your mobile device’s bluetooth is enabled.
- Return to the thermostat and select Start. The thermostat will now display an ID number.
- Return to the Lennox® Smart Technician App and look for the thermostat’s ID on the app screen. It will be the same as displayed on the thermostat’s screen.
- Select the thermostat’s ID listed on the app.
- A screen will indicate it is connecting to the thermostat. If connection is successful the next screen will indicate so.
- IMPORTANT: Enter dealer ID number. If not available, enter phone number associated with the dealer account. This will enable ability to do advanced diagnostics and remote sharing if permitted by homeowner.
- Set time, date, language and temperature unit (Fahrenheit or Celsius).
- Automatically detects communicating equipment and EIM. Non-Communicating equipment is added in the next screen. Smart Zoning may appear after this screen if installed along with airflow per zone screen.
- Specify reminder types and reminder frequency (ex: change filter every 3 months). 15. Continue with the on-screen prompts to complete the setup of the system.
To initially add Lennox® Smart Sensors, Lennox® Smart Air Quality Monitor and
Lennox® Wireless Extenders, the Lennox® Smart Technician App must be used. Go
to Menu > Settings > Advanced Settings > View Support Service Control Center >
Equipment Settings > Add Sensors.
NOTE: Installer, please share the homeowner quick start guide with
homeowner.
Step 5: Helping Homeowner Connect to Wi-Fi
- From the thermostat’s home screen, go to Menu > Settings > Wi-Fi.
- Slide the option to the ON position to enable Wi-Fi.
- Press on Not Connected to display a list of available access points.
- Locate home network and select the network name.
- Enter the home Wi-Fi network password and press join to continue. If successful the Thermostat Connectivity Status indicator as illustrated below will show checkmarks
across all connections.
NOTE: If you wish to see the characters you are typing, check show
password. The thermostat will support up to a 63 character password. Passwords
cannot contain blank spaces or % symbol.
NOTE: Whether connecting to a visible or hidden network, if successful, a
check mark will appear above both the router and Internet icons. For
information on connecting to hidden networks, please reference the S40
Homeowner Guide.
IMPORTANT
ADVANCED DIAGNOSTICS & REMOTE SHARING
Protect homeowner investment and peace of mind with active monitoring of
system operations through the Lennox® S40 Smart Thermostat. This feature is
free of charge and provides basic maintenance reminders, alerts homeowner of
potential issues, and can even allow the homeowner to remotely share
diagnostics with the Lennox dealer to troubleshoot and fix problems. This
proactive care helps eliminate downtime and avoid unnecessary service visits
and repair costs, ensuring nothing short of perfect air.
Please share this information with homeowner as you ask them to accept the
Advanced Diagnostics & Remote sharing permissions.
Scan QR Code for S40 Installation and Setup Guide
lennoxsmartertogether.com/dealer-access
Français / Español
lennoxsmartertogether.com/spanish-french