Fan; Allergen Defender; Circulation Timer Adjustment; Heat / Cool - Lennox S40 User Manual

Allergen Defender

Go to Menu > Settings > Fan to turn on or off Allergen Defender. Internet
weather must be enabled and the pollen count is high for the following pollens
(Grass, Ragweed, Mold, Tree and Overall Pollen) the fan will run between
heating or cooling demands to help clean the air. Works best with MERV 11 or
higher filter.

Circulation Timer Adjustment

Circulate air can be adjusted on this screen. Adjustments between 9 to 27
minute duration per hour. The circulate option runs during any mode selected
except when the system is turned off.
This screen allows changes to how the system operates. Options are single
set-point, heat pump mode (normal or comfort), auxiliary heat and safety
protection.

Perfect Temperature

1. This option will only be available in non-zoning systems. This option allows
the user to control both heating and cooling temperatures with one single
temperature setting. Factory default is off (see the following figure for
screen example).
NOTE: When set to Perfect Temp, the Heat • Cool position indicator changes.
The blue color (cooling) indicator is on the left and heating (red)
indicator is on the right. This is just the opposite on how it is displayed
in normal Heat • Cool mode. Also the Heat • Cool mode indicator will
display Auto instead.
NOTE: Perfect Temp is not compatible with Google Assistant. Google Assistant
will not be able to adjust your home temperature.
2. Select Heat Pump Mode: (only available with system using a heat pump).
Options are normal and comfort. Default is normal. Descriptions for what
each setting does is displayed on the screen.

Wider Set-Point Range

Changes the default low and high maximum temperature setting from 60-90°F
to 40-99°F (15.5 - 32.0°C to 4.5 - 37.0°C).

Fan

Heat / Cool

When the outdoor temperature is above the high balance point, only the
heat pump is allowed to run. When outdoor temperatures are below the low
balance point, only the auxiliary heat source is allowed to run. When outdoor
temperatures are between the high and low balance points, then both the heat
pump and auxiliary heat source are allowed to run.
Auxiliary heat is the use of an additional heat source, when the heat pump
BTU capacity is not sufficient to keep up with the home's heating demand;
sometimes it is also called supplemental heat. When used in a dual-fuel mode,
auxiliary heating is accomplished with a gas or oil fired unit. In this mode of
operation, the heat pump must shut down and uses just the auxiliary heating
unit for heating.
If the system is an air handler with electric heat, the auxiliary heat will be in
conjunction with the heat pump when the home heating requires it. Another
use of auxiliary heat with heat pump systems includes a setting called balance
point. Balance point puts temperature limits on when the heat pump and
electric heat work together or independently.
• When the outdoor temperature is above the default high balance point 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.
Alerts you if 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 notification is also sent to the Home screen
notification area and Lennox S40 Thermostat App.
Some options that are available under this section are dependent on type of
equipment (indoor and outdoor units) and humidification accessory is installed.
Adjustment Slider Tools
• Dehumidification 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.
25

Auxiliary Heat

Safety Protection

Humidity