Lennox S40 User Manual

40
Lennox Smart Air Quality Monitor
Side Switch
Pairing Button /
Factory Reset
Status Indicator
Up = ON
Down = OFF
Side Air Vent
Status Indicator Light Color Descriptions
NOTE: The light is only on if there is an issue with signal strength.
Table 1. Sensor Light - Two Color Descriptions
Function
Light
Color
Description
Signal
Strength
BLUE
• A solid blue light indicates the signal strength is
low or has lost connection to the thermostat.
• No blue light indicates signal strength is good.
Pairing GREEN
A ashing green light indicates the unit is in pairing
mode.
Adding and Removing the Smart Air Quality Monitor (SAQM)
This device can only be installed by a professional installer. A single Lennox
®
S40 Smart Thermostat can support one Lennox
®
Smart Air Quality Monitor.
How the Smart Air Quality Monitor Works
IMPORTANT
The Lennox
®
S40 Smart Thermostat will begin displaying information from
the Smart Air Quality Monitor once there is a blower/cooling/heating demand.
Until the rst thermostat demand, the SAQM will indicate it is calculating.
Figure 25. SAQM Calculating
When the Smart Air Quality Monitor detects poor indoor air quality (IAQ) in
the home it will pass that information on to the thermostat which will attempt
to clean the air. Depending on the IAQ equipment installed in the home, one
of the following methods will be used by the thermostat:
» If no IAQ equipment installed - The thermostat will run the indoor unit
blower to circulate air.
» High Efciency Filter - The thermostat will run the blower motor to
circulate the air through the lter cabinet.
» Pure Air - The thermostat turns on system to run Pure Air to circulate
the air through the Pure Air system.
» ERV / HRV - The thermostat will check outdoor air quality and compare
it to the indoor air quality. If outdoor air quality is better then it will bring
in fresh outdoor air. If outdoor air is poorer it will run the indoor blower
to circulate the indoor air.
Side Switch
The primary reason for this switch is to turn off the internal fan in case the
device is installed in a bedroom.

Lennox S40 Specifications

General

Display	Color touchscreen
Voice Control	Amazon Alexa, Google Assistant
Energy Reports	Yes
Programming	7-day programmable
Warranty	5-year limited warranty
Connectivity	Wi-Fi
Compatibility	Lennox HVAC systems
Smart Features	Geofencing
Sensors	Temperature, Humidity