VISIONPRO® IAQ TOTAL HOME COMFORT SYSTEM
21 68-0287—04
System and Fan Settings

System

The System key selections vary based on your heating and/or
cooling system type.
Heat — Thermostat controls the heating system.
Off — Both heating and cooling systems are off.
Cool — Thermostat controls the cooling system.
Auto — Thermostat automatically changes between heating
and cooling operation, depending on indoor temperature.
Em. Heat — Emergency heat cycles to maintain temperature.
Compressor is locked out and auxiliary heat turns on as
needed.

Fan

The Fan key selections vary based on the heating and/or
cooling system type.
On — Fan runs continuously. Use this setting for improved air
circulation or for more efficient central air cleaning.
Auto — fan follows the fan program schedule.
Circ — fan runs randomly approximately 35% of the time. Use
this setting for improved air circulation or for more efficient
central air cleaning when you do not want the fan running
continuously.
Control Humidification Level
The VisionPRO® IAQ Touchscreen Thermostat reads the
inside humidity level and allows for a humidification setting with
or without frost protection.
WITH FROST PROTECTION
Controlling humidification with frost protection requires an
outdoor temperature sensor. The Frost Index (scale 1–10) will
limit the amount of humidity added to the air based on outdoor
temperature, with 1=most dry and 10=most humid. This
prevents frost from accumulating on windows.
WITHOUT FROST PROTECTION
The frost setpoint is not displayed, but a humidity setpoint can
still be set.
1. Press the More key until the inside humidity level set-
point is shown.
2. Use Up and Down arrow keys, located to the right of the
humidity setpoint, to set desired humidity level.
3. Press Done key.
Control Dehumidification Level
The VisionPRO® IAQ Touchscreen Thermostat reads the
inside humidity level and allows for a dehumidification setting,
and can be set to dehumidify using the air conditioner or a
whole house dehumidifier.

With Air Conditioner

The set range for dehumidification is 40 to 80%, and can be set
in 5% increments. The thermostat must be in Cool mode or
Auto mode when the previous call was a call for cooling.
Dehumidifying in this manner runs the air conditioner longer
than simply cooling the house would require, and can be set to
run 1, 2, or 3°F below the temperature setpoint. This feature is
called Dehumidification Droop Control.
NOTE: You must use this setting if:
— No powered, whole house dehumidifier is present,
and
— The system uses the air conditioner as the
dehumidifier.
MORE
DONE CANCEL
DEHUMIDIFIER
Inside
Humidity
FROST
M23518
MORE
DONE CANCEL
DEHUMIDIFIER
Inside
Humidity
M23496
CURRENT
INDOOR
HUMIDITY
DEHUMIDIFIER
SETTING
(AUTO/OFF)
HUMIDITY SET
POINT
DONE CANCEL
DEHUMIDIFIER
Inside
M23514