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
53 68-0311—07
8010 Which Sensor will be
used for
Humidification
Control?
Thermostat (Internal)
Sensor Name (Remote)
Sensor Name (Remote)
Sensor Name (Remote)
Sensor Name (Remote)
Sensor Name (Remote)
Sensor Name (Remote)
(Up to 6 Remote Sensors)
Thermostat
(Internal)
Both No Select a sensor to control humidification
(thermostat or an optional remote sensor). If
multiple sensors are installed, you can use a
different sensor for dehumidification control.
See “Humidification control” beginning on
page 132.
Note: Humidity sensing cannot be averaged.
8030 What Terminals are
Wired to the
Humidifier?
None
U1
U2
U3
Thermostat
defaults to the
next unused
universal
terminal (U1,
U2, U3).
Both No Number of Universal Outputs:
THX9321 Thermostat: U1 and U2 terminals
Equipment Interface Module (EIM): U1, U2 and
U3 terminals
U1, U2, U3 are dry contacts that require power.
See “Wiring IAQ Equipment or a Heat/Cool
Stage to the Universal Terminals” beginning on
page 152.
8050 Humidification -
Window Protection
Off
On
Off Both No Requires an optional outdoor sensor.
Off: The thermostat controls the humidity level
to the user's desired humidity setting. Frost or
condensation may appear on windows.
On: The thermostat prevents frost or
condensation on windows by not allowing the
humidity to go above the “Window Limit” when
it is controlling the humidifier. The “Window
Limit” is based on the current outdoor
temperature and the user's window protection
setting. The “Window Limit” is displayed on the
user's humidification screen. See “Window
Protection” beginning on page 102.
8060 System Modes
Allowing
Humidification
Check box on screen for each:
Heat
Cool
Off
Heat
Default varies
based on
heating/cooling
equipment
selected
Both No Click boxes on screen to select which system
modes allow humidification. If a box is NOT
checked, the thermostat will NOT allow
humidification to operate in that mode.
Heat: Includes Heat, Emergency Heat and Auto.
If the system is in Auto mode, the thermostat
will allow humidification if the last call was for
heat.
Cool: Includes Cool and Auto. If the system is in
Auto mode, the thermostat will allow
humidification if the last call was for cool. A
discharge air temperature sensor is required to
humidify in the Cool mode.
Off: The thermostat will allow humidification
when the system setting is Off.
See “Set up Humidification” beginning on
page 103.
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes