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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 68
Set up Dehumidification With Whole House
Dehumidifier
Some screens shown in this section may not appear on the
thermostat, depending on how you set up dehumidification.
1. Select the Dehumidification Equipment in ISU 9000. See
Fig. 118.
Fig. 118.
2. If optional remote wireless indoor sensors are installed,
you can choose which sensor you want to use for dehu-
midification control. For example, you can use one sen-
sor for humidification control, and another for
dehumidification. See “Wireless Indoor Sensor” begin-
ning on page 96 for more information.
Fig. 119.
3. If you are sensing humidity from two separate locations
(one for humidification and another for dehumidification),
you can select which humidity reading to display on the
home screen. See “Wireless Indoor Sensor” beginning
on page 96 for more information.
Fig. 120.
4. Select the terminals wired to the Whole House Dehumid-
ifier. See Fig. 121.
Fig. 121.
5. Select the system mode(s) to allow dehumidification.
See Fig. 122.
NOTE: Heat includes Heat, Emergency Heat and Auto.
If the system is in Auto mode, the thermostat
will allow dehumidification if the last call was for
heat.
Cool includes Cool and Auto. If the system is in
Auto mode, the thermostat will allow dehumidifi-
cation if the last call was for cool.
Fig. 122.
6. Set Dehumidifier Fan Control settings. See Fig. 123.
• Thermostat Controls Fan
Thermostat turns on the dehumidifier and the fan
when dehumidification is needed.
• Equipment Controls Fan
Thermostat turns on the dehumidifier when
dehumidification is needed. The fan is controlled by
the equipment.
Fig. 123.