Honeywell Home THX9321 Prestige 2.0 Manual page 107

2. Set Fan Control settings. See Fig. 236.
• On: Fan is always on.
• Automatic: Fan runs only when cooling system is
on.
• Circulate: Fan runs randomly, about 35% of the
time.
Fig. 236.
3. Set temperature and dehumidification settings. See
Fig. 239.
• Low Limit Temperature Setting
If the cooling system is used to control humidity
while Dehumidification Away Mode is active, the
thermostat allows the cooling system to lower the
indoor air to the Low Limit Temperature Setting to
reach the Dehumidification Setting at ISU 9200.
• Temperature Setting
The temperature maintained while
Dehumidification Away Mode is active and the
desired humidity level is satisfied.
• Dehumidification Setting
The desired humidity level while Dehumidification
Away Mode is active.
Fig. 237.
Control Dehumidification Level
1. Press MENU, then scroll to select Dehumidification.
2. Press Auto to use the dehumidifier or cooling system
to maintain your desired humidity level.
3. Press Off to turn off dehumidification.
4. Move the slider bar to the humidity level you prefer,
then press DONE. The dehumidification setting
range is
40–80% in 5% increments.
®
THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
NOTE: When set for A/C with Low Speed Fan or A/C
with High Speed Fan, an overcooling limit
can be set from 0 °F to 3 °F (ISU 9070). The
thermostat uses the cooling system to
reduce humidity by lowering the tempera-
ture up to 3° F below the current cool set-
point until the desired humidity level is
reached.
5. Press MORE SETTINGS to review or change settings
for the dehumidifier filter timer.
NOTE: If humidification and dehumidification are setup
to operate in the same system mode (Heat, Cool,
Off) and you are sensing humidity from one loca-
tion, the thermostat will automatically enforce a
15% deadband between the humidification and
dehumidification settings. The thermostat will
automatically switch between humidification and
dehumidification to maintain the desired humidity
level.
If humidification and dehumidification are setup
to operate in the same system mode (Heat, Cool,
Off) and you are sensing humidity from two differ-
ent locations using a remote wireless indoor sen-
sor (for example, main level and crawl space), the
thermostat will allow humidification and dehu-
midification to operate at the same time, and there
is no deadband between humidification and dehu-
midification settings.
Scroll to select DEHUMIDIFICATION
Set humidity to desired level
Press to review filter timer
This setting is only available if "User selectable" is set for
ISU 9005. See "Dehumidification Fan Speed Priority"
beginning on page 103.
107
®
IAQ WITH EIM
Press
68-0311—08