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- 1. Lennox S40 Smart Thermostat (User Guide)
- 2. Temperature Settings (Wi-fi → Away → Current Temperature → Using Smart Room Sensors → Comfort Features → Setup And Customization Process)
- 3. Humidification Measurement And Dew Point Adjustment Controls (Heat Cool Mode → Compatible With Lennox Smart Room Sensors → Lennox Smart Room Sensor → Lennox Smart Air Quality Monitor → Pureair And Pureair S → Lennox Smart Zoning)
- 4. Setup And Customization Process (Set Up The S40 Smart Thermostat → Setup Process → Customization Process)
- 5. Adding Thermostat To S40 User Account (Selecting Yes → Selecting No → Create Home Or Select Existing Home)
- 6. Create Home Or Select Existing Home (Customize The S40 Smart Thermostat → Customization Process)
- 7. Screen 1 - Set Schedules For Energy Efficiencies (Screen 2 - One Touch Away → Screen 3 - Allergen Defender)
- 8. Feels Like (Alerts And Notifications → Performance Reports → Alerts And Notifications To Local Lennox Dealer)
- 9. Screen 8 - Advanced Diagnostics And Remote Sharing (Screen 10 - Smart Home Devices → Screen 9 - Screensaver)
- 10. S40 Smart Thermostat Customization (Create A New User Account → Verify That The Thermostat Is Connected To The Home Wi-fi → Launch The Lennox Home App → Select Allow)
- 11. Create New Account (Registration → Add Smart Thermostat → Lennox End User License Agreement)
- 12. Manually Adding S40 Smart Thermostat To Account (Tips For Connecting The Thermostat To The Home Wi-fi → Important → Wi-fi Considerations → Supported Wi-fi Network Types)
- 13. Verify The Thermostat Connectivity Status (Manually Connect To Wi-fi → Electromagnetic Interference Causing Poor Connectivity → Wi-fi Terminology → Connecting To A Visible Home Wi-fi Access Point → Connecting To A Hidden Wi-fi Access Point)
- 14. Thermostat Home Screen Details (Time And Date → Cooling Adjustment Tool → Heating Adjustment Tool → Current Room Temperature → Indoor Humidity)
- 15. Away Set Points (Temperature Settings → Current Outdoor Temperature And Weather Forecast → My Home → Time And Date Display → Humidity Display)
- 16. Monitor Settings (Thermostats And Zones → Lennox Smart Room Sensor → Lennox Wireless Extender (ble) → Extender Settings → Pureair S → Lennox Smart Air Quality Monitor)
- 17. Home And Status Screens Icon Descriptions (Purpose → Menu → Feels Like Is Active Or Turning Feels Like On → Smart Away Is Active Or Away Is Active → Heating → Cooling → Humidifying)
- 18. Home And Status Screens Icon Descriptions (Defrosting → Emergency Heat → Auxiliary Heat → Ambient Lockout → Fan Is Running → Fan In Auto Mode Is Active → Fan In Circulate Mode Is Active)
- 19. Home And Status Screens Icon Descriptions (Allergen Defender → System Under Test → Service Urgent → Coasting To Perfect Temp → Peak Monitoring)
- 20. Home And Status Screens Icon Descriptions (Schedule Hold Until Next Period → Cleaning Air → Postponing Cleaning Air → Advanced Diagnostics Request → Access Granted → Access Denied)
- 21. Table 2. Home And Status Screens Icon Descriptions (Purpose → Function Or Screen Text → Icon → Advanced Diagnostics → Access)
- 22. Menu (General → Notifications → User Account → Display Settings → Home Screen Settings)
- 23. Lennox Dealer Support Access (Mode → Important → Schedule (single Zone) → Local Lennox Dealer Info → Dealer Support Access → System)
- 24. Spring/fall (Winter → Save Energy → Schedule Options → At Home Day Wake-up → At Home Night Sleep → Away)
- 25. Homeowners Can Rename The Schedule Profile, Assign Day Grouping, System Mode, Fan Mode, Fan Duration And Restore To Default. (Schedules (zoning) → Important)
- 26. Settings (Wi-fi → System Info → Advanced Settings → Smart Away → Notifications → Unregister System)
- 27. Smart Away (Multiple Mobile Devices → Inner And Outer Away Fences → Mobile Device Location Services → Transition Set Points → Away Set Points)
- 28. Using Smart Room Sensors (Smart Away Feature → Feels Like Control → Sleep Mode)
- 29. Sleep Mode Feature (Enable/disable Sleep Mode → Set Sleep Mode Schedule → From And To Scheduling Fields → Set Time Dialog → Smart Room Sensor(s) And Thermostat Selections)
- 30. Note: At Least One Smart Room Sensor Must Be On In Order To Calculate Heat / Cool The Current Temperature. This Screen Allows Changes To How…
- 31. Humidity Control (Safety Protection → Humidification Control Center → Dehumidification Control Center → No Dehumidification Accessory Installed → Important)
- 32. Climate Iq (auto) (Humidity Control Modes Of Operations → Humidify + Dehumidify Settings → Staged Outdoor Unit → Variable Capacity Outdoor Unit → Note: Discharge Air Temperature Sensor)
- 33. Smart Zoning System (Humidity Control Modes Of Operations → Important → Heating / Cooling Changeover → Cooling Operation)
- 34. Heating Operation (Enable Peak Monitoring → Enroll In Peak Monitoring → Notifications → Peak Monitoring Settings → Peak Monitoring)
- 35. Canceling Peak Monitoring Event (Smart Devices → Equipment → Pureair S → Cancel Enrollment → Ventilation → Menu Selection)
- 36. What Is Ashrae? (Lennox Smart Devices → Whole House Ventilation → Lennox Smart Room Sensor → Adding And Removing Smart Room Sensor → Advanced Settings → Unregister System)
- 37. Sensor Settings (Room Averaging Using Occupancy Detection → Adding And Removing The Lennox Wireless Extender → View And Understanding The Wireless Extender Detail Screen → Occupancy Sensor Setting → Sensor Temperature Difference Limit)
- 38. Lennox Smart Air Quality Monitor (How The Smart Air Quality Monitor Works → Status Indicator → Adding And Removing The Smart Air Quality Monitor (saqm))
- 39. Smart Air Quality Details Screen (Important → Definition Of Contaminants → Good Air Quality → Fair Air Quality)
- 40. View Details And Postpone Cleaning Air (Poor Air Quality → Third-party Integration → Poor Network Signal → Indoor Level Of Air Cleanliness Setting → Important → Amazon Alexa)
- 41. Heat And Cool (auto-changeover) (Google Home And Assistant → Perfect Temp And Schedule Mode Functions → Heat / Cool Mode (auto-changeover))
- 42. Additional Help (Smart Home Systems → Control4 Smart Home | Operating System → Building36)
- 43. Alert Code Priority Types And Notification Options (Notifications Displayed Or Email Notifications Sent → Alert Priority → Alert Priority Description → Service Soon / Service Urgent → Maintenance Information)
- 44. Temporary Advanced Diagnostics Access (Enable Temporary Advanced Diagnostics Access → Advanced Diagnostics Access Request → Advanced Diagnostics In Progress Badge)
- 45. End Advanced Diagnostics Access (Fcc Statements → Fcc Compliance Statement Part 15.19 → Fcc Interference Statement Part 15.105 (b) → Rf Exposure Information → Canada License-exempt Rss Standard(s) Operation)
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LENNOX S40 Smart Thermostat User Guide
S40 Smart Thermostat Customization - Complete
Create a New User Account
1. Download the LennoxHomeApp from either
the Apple App Store or on Google Play to your
mobile device.
This screen displays after the thermostat has
been successfully customized.
Homeowners can begin using their
2. Verify that the thermostat is connected to the
home Wi-Fi and that all indicators are green
and check marked as illustrated in “Figure
3. Thermostat Connectivity Status” on page
15.
thermostats by pressing Go to Home screen.
NOTE: The Lennox® S40 Smart Thermostat
must be set up before the homeowner can
add the thermostat to their new account
(and is usually completed by the Dealer
or installer). See Set Up the Lennox® S40
Smart Thermostat in the Lennox® S40
Smart Thermostat Installation and Setup
Guide.
3. Launch the Lennox Home App.
4. Select Allow.
This is required if the homeowner intends
to upload a photo as a screensaver on the
thermostat.
The Allow Thermostat to access this
device’s location pop-up dialog displays.
This is required if the homeowner intends to
use the Smart Away feature to control the
thermostat.
5. Select Allow only while using the app.
12
| General | Details |
|---|---|
| Name | LENNOX S40 Smart Thermostat User Guide |
| Make | Lennox |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.3 MB |

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Table of Contents
- 1. Lennox S40 Smart Thermostat - User Guide →
- 2. Temperature Settings - Wi-fi →
- 3. Humidification Measurement And Dew Point Adjustment Controls... →
- 4. Setup And Customization Process - Set Up The S40 Smart Therm... →
- 5. Adding Thermostat To S40 User Account - Selecting Yes →
- 6. Create Home Or Select Existing Home - Customize The S40 Smar... →
- 7. Screen 1 - Set Schedules For Energy Efficiencies - Screen 2 -... →
- 8. Feels Like - Alerts And Notifications →
- 9. Screen 8 - Advanced Diagnostics And Remote Sharing - Screen ... →
- 10. S40 Smart Thermostat Customization - Create A New User Accou... →
- 11. Create New Account - Registration →
- 12. Manually Adding S40 Smart Thermostat To Account - Tips For C... →
- 13. Verify The Thermostat Connectivity Status - Manually Connect... →
- 14. Thermostat Home Screen Details - Time And Date →
- 15. Away Set Points - Temperature Settings →
- 16. Monitor Settings - Thermostats And Zones →
- 17. Home And Status Screens Icon Descriptions - Purpose →
- 18. Home And Status Screens Icon Descriptions - Defrosting →
- 19. Home And Status Screens Icon Descriptions - Allergen Defende... →
- 20. Home And Status Screens Icon Descriptions - Schedule Hold Un... →
- 21. Table 2. Home And Status Screens Icon Descriptions - Purpose →
- 22. Menu - General →
- 23. Lennox Dealer Support Access - Mode →
- 24. Spring/fall - Winter →
- 25. Homeowners Can Rename The Schedule Profile, Assign Day Group... →
- 26. Settings - Wi-fi →
- 27. Smart Away - Multiple Mobile Devices →
- 28. Using Smart Room Sensors - Smart Away Feature →
- 29. Sleep Mode Feature - Enable/disable Sleep Mode →
- 30. Note: At Least One Smart Room Sensor Must Be On In Order To ... →
- 31. Humidity Control - Safety Protection →
- 32. Climate Iq (auto) - Humidity Control Modes Of Operations →
- 33. Smart Zoning System - Humidity Control Modes Of Operations →
- 34. Heating Operation - Enable Peak Monitoring →
- 35. Canceling Peak Monitoring Event - Smart Devices →
- 36. What Is Ashrae? - Lennox Smart Devices →
- 37. Sensor Settings - Room Averaging Using Occupancy Detection →
- 38. Lennox Smart Air Quality Monitor - How The Smart Air Quality... →
- 39. Smart Air Quality Details Screen - Important →
- 40. View Details And Postpone Cleaning Air - Poor Air Quality →
- 41. Heat And Cool (auto-changeover) - Google Home And Assistant →
- 42. Additional Help - Smart Home Systems →
- 43. Alert Code Priority Types And Notification Options - Notific... →
- 44. Temporary Advanced Diagnostics Access - Enable Temporary Adv... →
- 45. End Advanced Diagnostics Access - Fcc Statements →



















































