Indoor Air Quality System Settings Tables; Air Cleaning Sytem Settings Table; Humidifier System Settings Table; Dehumidifier System Settings Table - Aprilaire 8620W 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 15, outdoor
sensor, will be presented prior to entering the Indoor Air Quality system settings.
Please refer to the Model 8620W 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. (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 yes .)
Humidity Setpoint Select the minimum difference between the humidifier and
Deadband 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 .
Change Water Panel Selects the when the "Change Water Panel" message is
Reminder displayed .
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 .)
10
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
Auto
Manual
10 percent RH
10 to 20 Percent RH
Heat Only
Heat or Fan
Forces Fan
Off
1 Per Season
2 Per Season
300 Hours
600 Hours
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
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
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 a
humidifier is installed 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
Temp Limit cool to, to meet RH setpoint in Vacation Mode. (Only
available if dehumidifier control is set to air conditioner .)

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
Fresh Air Vent Installed Selects if ventilation is installed .
(If set to no, no other ventilation settings will be available.)
Fresh Air Forces Fan Selects if ventilation forces the fan on .
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 .
Fresh Air Time Selects how many minutes per hour that ventilation will be
active . (Only available if fresh air setup is set to timed .)
High Limit Outdoor Selects if ventilation is disabled if the outdoor temperature
Temp exceeds the outdoor high limit. (Only available if fresh air setup
is set to timed and an outdoor temperature sensor is installed .)
Outdoor High Limit Sets the high temperature limit for ventilation . (Only available if
high limit outdoor temp set to yes .)
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 .)
Outdoor Low Limit Sets the low temperature limit for ventilation . (Only available if
low limit outdoor temp set to yes .)
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 .)
Indoor RH Limit Sets the high indoor RH limit for ventilation . (Only available if
high limit indoor RH is set to yes .)
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 (23.5°C)
70°F to 85°F (21°C to 28.5°C)
factory default setting (bold)
and setting range
No
Yes
No
Yes
Timed
ASHRAE
30 MIN/HR
0 to 60 MIN/HR
No
Yes
100°f (38°C)
90°F to 100°F (32°C to 38°C)
No
Yes
10°f (-12°C)
-10°F to 30°F (-24°C to 0°C)
No
Yes
60%
50% to 70%
11