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
47 68-0311—07
5030 Indoor Temperature
Sensor Type
10K
20K
10K:
if ISU 1010
Application is
Residential
20K:
if ISU 1010:
Application is
Commercial
Both Yes Wired Sensors requires an EIM (Equipment
Interface Module).
Select 10K or 20K based on the sensor
installed. Refer to resistance values below:
C7189U1005 = 10K ohm
C7772 = 20K ohm
TR21 = 20K ohm
TR21-A = 10K ohm (IMPORTANT - the TR21-A
must be used in combination with a TR21
sensor or another TR21-A sensor for the
thermostat to calculate the correct indoor
temperature reading).
See “Wiring guide — Wired Indoor Sensors”
beginning on page 158 for information on the
sensor type you should select based on how the
sensors are wired. For example, you would
select 20K when you have two TR21-A (10K)
sensors wired in series.
5040 Which Sensors will be
used for
TEMPERATURE
Control? (Multiple
Sensors are
Averaged)
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)
Sensors are
Averaged
(Internal and
Remote)
Both No Select the sensors to be used for temperature
control. If you select more than one, the
thermostat will average the temperature
readings from each sensor.
See “Remote Indoor Sensors” beginning on
page 132.
5050 What Terminals are
Wired to the Outdoor
Temperature Sensor?
None
S1
S2
S3
S4
None Both Yes Wired Sensors requires an EIM (Equipment
Interface Module).
5070 What Terminals are
Wired to the Return
Air Temperature
Sensor?
None
S1
S2
S3
S4
None Both Yes Wired Sensors requires an EIM (Equipment
Interface Module).
5080 Return Air
Temperature Sensor
Type
10K
20K
10K Both Yes Wired Sensors requires an EIM (Equipment
Interface Module).
Select 10K or 20K based on the sensor
installed. Refer to resistance values below:
50062329-001 = 10K ohm
32005180-002 = 10K ohm
C7735A1000 = 10K ohm
C7770A = 20K ohm
C7041 = 20K ohm
5090 What Terminals are
Wired to the
Discharge Air
Temperature Sensor?
None
S1
S2
S3
S4
None Both Yes Wired Sensors requires an EIM (Equipment
Interface Module).
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes