Indoor Air Quality System Settings Tables; Air Cleaning Sytem Settings Table; Humidifier System Settings Table; Dehumidifier System Settings Table - Aprilaire 8620 Safety & Installation Instructions

SETUP & TESTING

INDOOR AIR QUALITY SYSTEM SETTINGS TABLES

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
Air Cleaner Installed Selects if an air cleaner is installed . (If set to no, no other
air cleaning settings will be available .)
Change Air Filter Reminder The period for displaying the "Change Air Filter" message .

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
Humidifier Installed Selects if a humidifier is installed . Yes/On HVAC is used
for applications where the humidifier is installed on the
HVAC duct . Yes/Standalone is used for application where
the humidifier is independent of the HVAC system . (If set to
no, no other humidifier settings will be available .)
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
Installed .)
Humidity Setpoint Selects the minimum difference between the humidifier
Deadband and dehumidifier setpoints . (Only available if a humidifier is
installed and dehumidifier control is set to air conditioner .
Available in both set-ups .)
Humidifier Operation Selects when humidification is allowed to occur relative
to heating and fan operation . Without Fan allows
humidification to occur without the HVAC fan . This option
should only be used when the humidifier is independent
of the HVAC system . Note: Without Fan is only available
when Humidifier Installed is set to Yes/Standalone .
CAUTION: When Humidifier Operation is set to Without Fan the thermostat will turn on humidification
without energizing the HVAC fan . Do not select this option when the humidifier is installed on the HVAC duct .
Without airflow moisture can accumulate in the duct resulting in significant damage .
Change Water Panel Selects the when the "Change Water Panel" message is
Reminder displayed .
10 English
Factory default setting (bold)
and setting range
No
Yes
Off
1 to 12 months or "Off" to disable
Factory default setting (bold)
and setting range
No
Yes/On HVAC
Yes/Standalone
Auto
Manual
10 Percent RH
10 to 20 Percent RH
Heat Only
Heat or Fan
Forces Fan
Without Fan
Off
1 Per Season
2 Per Season
300 Hours
600 Hours
SETUP & TESTING
System setting Description
Reminder Month (Change Change Water Panel Reminder set to 1 per Season:
Water Panel Reminder set Determines the month the "Change Water Panel" message
to 1 per Season) is displayed .
First Reminder Month Change Water Panel Reminder set to 2 per Season:
(Change Water Panel Determines the first month the "Change Water Panel"
Reminder set to 2 per message is displayed .
Season)
Second Reminder Start Determines the second month the "Change Water Panel"
Month message is displayed . (Only available when Change Water
Panel Reminder set to 2 per Season .)

Dehumidifier System Settings Table

Note: Dehumidifier control can only be set to whole home if ventilation and humidification are not installed .
System setting Description
Dehumidifier Control Selects method of dehumidification .(If set to none, no
other dehumidifier settings will be available .)
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 .)
Lockout Dehumidifier During Selects if dehumidification is disabled during a cooling
Cooling call . (Only available if dehumidifier control is set to
whole home .)
Dehumidifier Forces Fan Select if dehumidification can turn on the fan . (Only
available if dehumidifier control is set to whole home .)
Dehumidifier Service The period for displaying the "Dehum Service
Reminder Reminder" message . (Only available if dehumidifier
control is set to whole home .)
Dehumidifier Overcooling Selects the amount of overcooling that can occur
Limit for dehumidification . (Only available if dehumidifier
control is set to air conditioner .)
Dehumidify in Vacation Selects if dehumidification with the air conditioner is
Mode done in Vacation Mode . (Only available if dehumidifier
control is set to air conditioner .
Vacation Dehumidifier Low Sets the lowest temperature the air conditioner will cool
Temp Limit to meet RH setpoint in Vacation Mode . (Only available if
dehumidifier control is set to air conditioner .)
Factory default setting (bold)
and setting range
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
Factory default setting (bold)
and setting range
None (no dehumidification installed)
Whole Home
Air Conditioner
10 Percent RH
10 to 20 Percent RH
No
Yes
No
Yes
Off
1 to 12 months or "Off" to disable
3°F (1.5°C)
1°F to 3°F (0 .5°C to 1 .5°C)
No
Yes
75°F (24°C)
70°F to 85°F (21°C to 29°C)
English 11