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
55 68-0311—07
9010 Which Sensor will be
used for
Dehumidification
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 dehumidification
(thermostat or an optional remote sensor). If
multiple sensors are installed, you can use a
different sensor for humidification control. See
“Dehumidification control” beginning on
page 132.
Note: Humidity sensing cannot be averaged.
9020 Which Indoor
Humidity Sensor
should be displayed
on the Home Screen?
Humidification Sensor
Dehumidification Sensor
Humidification
Sensor
Both No This ISU is only displayed when separate
humidity sensors are used to control
humidification and dehumidification. Only one
of the sensors can be displayed on the home
screen. Select either the Humidification Sensor
or the Dehumidification Sensor.
9040 What Terminals are
Wired to A/C with
Low Speed Fan?
What Terminals are
Wired to Hot Gas
Bypass?
What Terminals are
Wired to the
Dehumidifier?
What Terminals are
Wired to the Whole
House Dehumidifier?
Note: Installer Setup
Name varies
depending on the
dehumidification
equipment installed.
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.
9050 A/C with Low Speed
Fan Setup
Hot Gas Bypass
Setup
Note: Installer Setup
Name varies
depending on the
dehumidification
equipment installed.
Normally Closed
Normally Open
Defaults to
Normally Closed
when ISU 9000
Dehumidificatio
n Equipment is
A/C with Low
Speed Fan
Defaults to
Normally Open
when ISU 9000
Dehumidificatio
n Equipment is
Hot Gas Bypass
Both No Choose an option appropriate for the type of
equipment installed.
Normally Open: U1, U2 or U3 will normally be
open and will close when the thermostat calls
for dehumidification.
Normally Closed: U1, U2 or U3 will normally be
closed and will open when the thermostat calls
for dehumidification.
Number of Universal Outputs:
THX9321 Thermostat: U1 and U2 terminals
Equipment Interface Module (EIM): U1, U2 and
U3 terminals
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes