Lennox S40 User Manual

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» Climate IQ (Auto) - Automatically adjusts system run-time based on a
combination of dehumidication set point and local weather conditions
obtained from the Internet. May over cool your home to achieve the
desired dehumidication set point.
» Both overcooling and dehumidication set point slider adjustment tools
are available for both Max and Climate IQ (Auto). The overcooling
adjustment slider tool limits overcooling between 0ºF to 4ºF.
Humidify + Dehumidify Settings
When this option is selected, a combination of both humidication and
dehumidication settings are available.
When dew point is set to OFF. Then a dual purpose slider adjustment tool will
appear. This tool allows the homeowner to adjust the set point percentage for
both humidication (left slider) and dehumidication (right slider). Range is
15% to 60% humidity.
Table 3. Humidity Control Modes of Operations
Function
Setting
Mode
Description
Humidication Only
Normal
These thermostat modes allow the homeowner
to control the relative humidity (RH) between
15% and 45%.
The following conditions must be met for either
mode to operate:
• Humidication mode has been enabled
• Unit is in HEAT mode
• Humidication demand exists
Additionally, the NORMAL mode requires that
heat demand exists.
Max
40%
humidification set−point
45%
15%
Table 3. Humidity Control Modes of Operations
Function
Setting
Mode
Description
Dehumidication
Only
Normal
This setting is recommended when the air
outside is not too humid and the outdoor unit is
either staged or variable capacity.
Max
• Staged Outdoor Unit: This setting is
recommended when the outdoor air is
excessively humid. This setting may cool the
home below the set temperature in order to
remove excessive indoor humidity.
• Variable Capacity Outdoor Unit:
Recommend when the outdoor air is
excessively humid. This setting adjusts
cooling based on installed duct sensor data.
This setting may cool the home below the set
temperature.
NOTE: Discharge air temperature sensor
(catalog number 88K38) is required.
Dehumidication
Only
Climate IQ
(Auto)
This feature is applicable only to Lennox
communicating thermostats with either Lennox
communicating staged or variable capacity
outdoor units only. This setting automatically
adjusts both indoor fan speed and cooling power
based on local climate conditions using Climate
IQ
®
technology. This setting may cool the home
below the set temperature.
The below adjustment tools are only available with either Max or
Climate IQ setting selected.
overcooling
0°F
0°F
4°F
2°F

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