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SETUP & TESTING
Dehumidifier System Settings Table
Note: Dehumidifier control can only be set to whole home if ventilation and humidification are not installed.
System setting Description
Factory default setting (bold)
and setting range
Dehumidifier Control Selects method of dehumidification.(If set to none, no
other dehumidifier settings will be available.)
None (no dehumidification installed)
Whole Home
Air Conditioner
Humidity Setpoint Deadband Select the minimum difference between the humidifier
and dehumidifier setpoints. (Only available if
humidifier mode is set to manual and dehumidifier
control is set to air conditioner. Available in both
set-ups.)
10 Percent RH
10 to 20 Percent RH
Lockout Dehumidifier During
Cooling
Selects if dehumidification is disabled during a cooling
call. (Only available if dehumidifier control is set to
whole home.)
No
Yes
Dehumidifier Forces Fan Select if dehumidification can turn on the fan. (Only
available if dehumidifier control is set to whole home.)
No
Yes
Dehumidifier Service
Reminder
The period for displaying the “Dehum Service
Reminder” message. (Only available if dehumidifier
control is set to whole home.)
Off
1 to 12 months or “Off” to disable
Dehumidifier Overcooling
Limit
Selects the amount of overcooling that can occur
for dehumidification. (Only available if dehumidifier
control is set to air conditioner.)
3°F (1.5°C)
1°F to 3°F (0.5°C to 1.5°C)
Dehumidify in Vacation
Mode
Selects if dehumidification with the air conditioner is
done in Vacation Mode. (Only available if dehumidifier
control is set to air conditioner.
No
Yes
Vacation Dehumidifier Low
Temp Limit
Sets the lowest temperature the air conditioner will cool
to meet RH setpoint in Vacation Mode. (Only available if
dehumidifier control is set to air conditioner.)
75°F (24°C)
70°F to 85°F (21°C to 29°C)
Ventilation System Settings Table
Note: Ventilation can only be installed if humidification is not installed and dehumidifier control is not set to whole home.
System setting Description
Factory default setting (bold)
and setting range
Fresh Air Vent Installed Selects if ventilation is installed.
(If set to no, no other ventilation settings will be available.)
No
Yes
Fresh Air Forces Fan Selects if ventilation forces the fan on. No
Yes
Fresh Air Setup Selects if ventilation is configured through the ASHRAE setup
or Timed. If ASHRAE setup is selected, the hourly ventilation
time will be calculated using the ASHRAE recommendations.
If Timed set-up is selected, the hourly ventilation time will be
determined based on the Fresh Air Time value.
Timed
ASHRAE
Fresh Air Time Selects how many minutes per hour that ventilation will be
active. (Only available if fresh air setup is set to timed.)
30 MIN/HR
0 to 60 MIN/HR
High Limit Outdoor
Temp
Selects if ventilation is disabled if the outdoor temperature
exceeds the outdoor high limit. (Only available if fresh air setup
is set to timed and an outdoor temperature sensor is installed.)
No
Yes
Outdoor High Limit Sets the high temperature limit for ventilation. (Only available if
high limit outdoor temp set to yes.)
100°F (38°C)
90°F to 100°F (32°C to 38°C)
Low Limit Outdoor Temp Selects if ventilation is disabled if the outdoor temperature
exceeds the outdoor low limit. (Only available if fresh air setup
is set to timed and an outdoor temperature sensor is installed.)
No
Yes
Outdoor Low Limit Sets the low temperature limit for ventilation. (Only available if
low limit outdoor temp set to yes.)
10°F (-11°C)
-10°F to 30°F (-23°C to -1°C)
High Limit Indoor RH Selects if ventilation is disabled if the indoor RH exceeds the
indoor RH limit. (Only available if fresh air setup is set to timed.)
No
Yes
Indoor RH Limit Sets the high indoor RH limit for ventilation. (Only available if
high limit indoor RH is set to yes.)
60%
50% to 70%
SETUP & TESTING
The following tables contain the Indoor Air Quality system settings and their details. Default settings are shown in
bold. Some settings are only present dependent upon the value of other settings.
The use of the included outdoor temperature sensor (recommended) enables additional Indoor Air Quality functionality.
If the outdoor temperature sensor was not enabled in the HVAC system settings, HVAC system setting 11, outdoor
sensor, will be presented prior to entering the Indoor Air Quality system settings.
Please refer to the Model 8620 Owner’s Manual for further information about thermostat features.
Air Cleaning System Settings Table
System setting Description
Factory default setting (bold)
and setting range
Air Cleaner Installed Selects if an air cleaner is installed. (If set to no, no other
air cleaning settings will be available.)
No
Yes
Change Air Filter Reminder The period for displaying the “Change Air Filter” message.
Off
1 to 12 months or “Off” to disable
Humidifier System Settings Table
Note: A humidifier can only be installed if ventilation is not installed and dehumidifier control is not set to whole home.
System setting Description
Factory default setting (bold)
and setting range
Humidifier Installed Selects if a humidifier is installed. (If set to no, no other
humidifier settings will be available.)
No
Yes
Humidifier Mode Selects auto or manual mode. Auto mode controls humidity
based on the humidity setting and outdoor temperature.
Manual mode controls humidity based on the %RH setpoint.
(Auto mode is only available if outdoor sensor is set to yes.)
Auto
Manual
Humidity Setpoint
Deadband
Select the minimum difference between the humidifier
and dehumidifier setpoints. (Only available if humidifier
mode is set to manual and dehumidifier control is set to air
conditioner. Available in both set-ups.)
10 Percent RH
10 to 20 Percent RH
Humidifier Operation Selects when humidification is allowed to occur relative to
heating and fan operation.
Heat Only
Heat or Fan
Forces Fan
Change Water Panel
Reminder
Selects the when the “Change Water Panel” message is
displayed.
Off
1 Per Season
2 Per Season
300 Hours
600 Hours
Reminder Month (Change
Water Panel Reminder set
to 1 per Season)
First Reminder Month
(Change Water Panel
Reminder set to 2 per
Season)
Change Water Panel Reminder set to 1 per Season:
Determines the month the “Change Water Panel” message
is displayed.
Change Water Panel Reminder set to 2 per Season:
Determines the first month the “Change Water Panel”
message is displayed.
October
November
December
January
February
March
April
May
June
July
August
September
Second Reminder Start
Month
Determines the second month the “Change Water Panel”
message is displayed. (Only available when Change Water
Panel Reminder set to 2 per Season.)
October
November
December
January
February
March
April
May
June
July
August
September
INDOOR AIR QUALITY SYSTEM SETTINGS TABLES