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
68-0311—07 132
REMOTE INDOOR SENSORS
For installation, see “Mounting C7189R1004 Wireless
Indoor Sensor” on page 68, and “Mounting C7189U1005
Wired Indoor Sensor” on page 69. For wiring, see “Wiring
guide — Wired Indoor Sensors” on page 158.
Indoor Sensor Operation
Temperature Control
The thermostat can be set to respond to its internal
temperature sensor, or to an optional remote indoor
sensor. If multiple sensors are used, the thermostat will
average the temperature detected at each sensor.
Fig. 315.
Humidification control
If optional remote indoor sensors are installed, you can
choose which sensor you want to use for humidification
control. You can use a different sensor for
dehumidification.
NOTE: Requires wireless indoor sensor.
Fig. 316.
Dehumidification control
If optional remote indoor sensors are installed, you can
choose which sensor you want to use for dehumidification
control. For example, you can use one sensor for
humidification control, and another for dehumidification.
NOTE: Requires wireless indoor sensor.
Fig. 317.
Wireless Indoor Sensor
The wireless indoor sensor senses temperature and
humidity in remote locations and communicates that
information wirelessly to the thermostat.
The indoor sensor can be used to do the following:
• Maintain a more consistent temperature throughout
the building by averaging temperatures. Temperatures
from all sensors, including the thermostat, are
weighted equally.
• Relocate sensing location (thermostat is in a poor
location).
• Relocate the thermostat (if you want to hide the
thermostat).
• Humidify and dehumidify in separate spaces (for
instance, humidify on the main level, and dehumidify in
the crawl space).
You can connect up to 6 Wireless Indoor Sensors to the
thermostat. If you connect a Wired Indoor Sensor network
to the S1, S2, S3, or S4 terminals, you can connect up to 5
Wireless Indoor Sensors to the thermostat.
The indoor air sensor has a 1 year battery life.
Battery level indicators (when batteries are inserted)
• Good: Status light flashes green for 5 seconds.
• Low: Status light flashes red for 5 seconds. Use fresh
batteries.
Battery level indicators (during use)
• Good: Status light remains off.
• Low: Battery power will be depleted in about 2 months.
Thermostat displays Low Battery warning. Status light
remains off.