Lennox Smart Air Quality Monitor; Status Indicator Light Color Descriptions; Adding And Removing The Smart Air Quality Monitor (Saqm); How The Smart Air Quality Monitor Works - Lennox S40 User Manual

Lennox Smart Air Quality Monitor

Status Indicator
Pairing Button /
Factory Reset

Side Switch

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
Light
Function Description
Color
• A solid blue light indicates the signal strength is
Signal
low or has lost connection to the thermostat.
BLUE
Strength
• No blue light indicates signal strength is good.
A flashing green light indicates the unit is in pairing
Pairing GREEN
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.
®
40

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 first 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 Efficiency Filter - The thermostat will run the blower motor to
circulate the air through the filter 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.
The primary reason for this switch is to turn off the internal fan in case the
device is installed in a bedroom.
Side Switch