Lennox S40 User Manual

33
of 50°F (10°C) (default), only the heat pump will be allowed to run (no
auxiliary heat).
» When the outdoor temperature is below the default low balance point
of 25°F (-4.0°C) (default), only the auxiliary heat is allowed to run (no
mechanical heat pump operation).
» When the outdoor temperature is between the low and high balance
point settings both heat sources are allowed to satisfy the heating
demand.
Safety Protection
Alerts the homeowner when the home gets too cold or hot. This is set under
this menu option on the setting for both low and high temperatures. The
system will automatically turn on either cooling or heating if the home’s
interior temperature reaches either the low or high setting. A notication is
also sent to the Home screen notication area and Lennox S40 Thermostat
App.
Humidity
Some options that are available under this section are dependent on type of
equipment (indoor and outdoor units) and whether a humidication accessory
is installed.
AdjUsTmenT slider Tools
» Dehumidication Set Point Percentage - The slide bar adjustment
tool allows desired humidity level in the home. Selection between 40%
to 60% are available. Default is 55% when dehumidify is enabled.
» Humidication Set Point Percentage - This adjustment tool is only
visible when dew point is set to OFF. Range is 15% to 45% humidity.
Default is 40%.
» Overcooling - This adjustment allows selection between 0°F to 4°F
(0°C to -2°C). This adjustment is only available when Max or Climate
IQ (Auto) is selected. This selection will limit how much overcooling is
allowed when trying to achieve the dehumidication set point. Default is
2°F (1.0°C).
» Dew Point - This adjustment helps reduce the amount condensation
that may build up on windows and other glass surfaces. A dew point
slider bar option will appear under the humidity menu. By default the
dew point slider is set to OFF. When dew point is set to ON, the slide
bar adjustment will appear with a range of -15% to 15%. Default is 0%.
NOTE: Dew Point - Adjustment requires an outdoor temperature sensor and
is automatically controlled by the outside temperature.
Humidity Control
The following options are available under humidity control:
» Off
» Humidify option is only available when a humidication accessory is
installed.
» Dehumidify option is only available with or without a dehumidication
accessory installed.
» Humidify + Dehumidify option is only available when a humidication
accessory is installed.
Humidication Control Center
When a humidication accessory is installed and humidify is enabled, the
options are as follows:
• Normal — Recommended for moderate climates. This runs the humidier
when there is a call for heat and humidication.
• Max — Recommended for drier climates. This runs the humidier when
there is a call for humidication only.
» Dew Point percentage slider adjustment tool is available for both
Normal and Max settings.
» Humidication set point percentage slider adjustment tool is only visible
when Dew point is set to OFF.
Dehumidication Control Center
IMPORTANT
The following dehumidication settings are not applicable and ignored on
systems employing iHarmony Zoning.
No Dehumidication Accessory Installed
When dehumidify is enabled and no dehumidier accessory is installed, the
dehumidication options are as follows:
» Basic - Recommended for moderate climates. No dehumidication
is active. Dehumidication set point slider adjustment tool only is
available.
» Max - Recommended when outdoor air is excessively humid. May over
cool your home to achieve the desired dehumidication set point.

Lennox S40 Specifications

General

Brand	Lennox
Model	S40
Category	Thermostat
Language	English