Spec Sheet
Table Of Contents
- Application
- Features
- Contents
- Specifications
- System Installation
- Installation Options
- Guidelines for Installing RedLINK Devices
- Installing Equipment Interface Module (if used)
- Wiring 24 Vac Common
- Selecting Discharge and Return Air Temperature Sensor Mounting Locations
- Selecting Return Air Temperature Sensor Mounting Location
- Installing Discharge and Return Air Temperature Sensors
- Selecting Thermostat Location
- Installing Wallplate
- Power Optional REDLINK™ Accessories
- Performing Initial Setup
- Linking Thermostat to Equipment Interface Module (if used)
- Linking RedLINK™ Accessories
- Completing Initial Setup
- Adding RedLINK Accessories to the Thermostat
- Locating the Connect Buttons on RedLINK Accessories
- Finding Your Password (Date Code) to Access Installer Options
- Installer Options
- Making Changes to Installer Setup
- Installer Tests
- Operation
- Setting the time/date
- Setting the fan
- Setting system mode
- Preset Energy-Saving Schedules
- Adjusting program schedules
- Overriding schedules: residential use
- Overriding schedules: commercial use
- Viewing equipment status
- Setting vacation hold: residential use
- Setting holiday/event schedules: commercial use
- Setting custom events: commercial use
- Setting holiday schedule: commercial use
- Setting holiday override: commercial use
- Initiating occupancy mode: commercial use
- Remote setback: commercial use
- Adjusting humidification settings
- Adjusting dehumidification settings: residential use
- Adjusting dehumidification settings: commercial use
- Adjusting ventilation settings
- Customizing screen color
- Setting preferences
- Cleaning the thermostat screen
- Adjusting security settings
- Viewing dealer information
- Advanced Features
- Installer options
- Using the temperature display
- Using the humidity display
- Universal Outputs (U1, U2, U3)
- Universal Inputs (S1, S2, S3, S4)
- Alerts and Diagnostics
- Heat Pump and Backup Heat Operation
- Indoor Air Quality (IAQ) Control
- IAQ Reminders
- Customizable Reminders
- USB Port
- Commercial Features
- Overriding schedules: commercial use
- Setting holiday/event schedules: commercial use
- Setting custom events: commercial use
- Setting holiday schedule: commercial use
- Setting holiday override: commercial use
- Initiating occupancy mode: commercial use
- Ramp Rates
- Custom Names
- Remote Setback
- Economizer and Time of Day (TOD) Operation
- Pre-Occupancy Purge
- Battery Replacement
- Optional Accessories
- Portable Comfort Control
- Remote Indoor Sensors
- Backup Control
- Replacing a Thermostat
- Replacing an Equipment Interface Module
- Wiring
- EIM Wiring Diagrams
- THX9321 Thermostat Wiring Diagrams
- THX9321 Thermostat Wiring Diagrams Using Universal Relays to Control Heating or Cooling
- Wiring IAQ Equipment or a Heat/Cool Stage to the Universal Terminals
- Economizer Module Wiring Diagrams
- Wiring C7089U1006 Outdoor Sensor
- Wiring guide — Wired Indoor Sensors
- Zoning
- Troubleshooting
- Regulatory Information
THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
113 68-0311—07
4. Select the terminals wired to the Dehumidifier. See
Fig. 249.
Fig. 249.
5. Select the system mode(s) to allow dehumidification.
See Fig. 250.
NOTE: Heat includes Heat, Emergency Heat and
Auto. If the system is in Auto mode, the ther-
mostat 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
dehumidification if the last call was for cool.
Fig. 250.
6. Set Dehumidifier Fan Control settings. See Fig. 251.
• 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. 251.
7. Set the desired lockout option. See Fig. 252.
Fig. 252.
NOTE: ISU 10140 gives the option to lockout venti-
lation on calls for dehumidification. This
helps maintain the desired humidity level.
Dehumidification Away Mode
Dehumidification Away Mode for a commercial
application is identical to Dehumidification Away Mode for
a residential application. See “Dehumidification Away
Mode” on page 108 and “Set up Dehumidification Away
Mode” beginning on page 109.
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.
5. If your air conditioner is used to control humidity, the
thermostat may use the following methods to main-
tain your desired humidity:
• Cool from 1° to 5° F lower than your temperature
setting.
• Run cooling for the minimum “on” time to reduce
humidity.
• Run cooling and heating at the same time to
reduce humidity without lowering the
temperature.
6. Press MORE SETTINGS to review or change settings
for the dehumidifier filter timer.