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—07 136
BACKUP CONTROL
This section explains when backup control is used. For
example, if batteries in the wireless indoor sensors are
depleted.
If the Thermostat is Part of the
Temperature Average
1. The thermostat controls the system using the
remaining sensors that are part of the temperature
average.
2. If there are no remote indoor sensors remaining, the
thermostat controls the system using its internal
sensor.
3. If the internal thermostat sensor is not available and
a Return Air Sensor is connected, the Backup Control
in the EIM is used. The backup control maintains 55
°F in heat, 85 °F in cool and operates the fan contin-
uously to sense and control temperature.
If the Thermostat is NOT Part of the
Temperature Average
1. The thermostat controls the system using the
remaining sensors that are part of the temperature
average.
2. If there are no remote indoor sensors remaining and
a Return Air Sensor is connected, the Backup Control
in the EIM is used. The backup control maintains 55
°F in heat, 85 °F in cool and operates the fan contin-
uously to sense and control temperature.
REPLACING A THERMOSTAT
When you replace a thermostat, you must reset the
RedLINK accessories before connecting them to the new
thermostat.
Follow the instructions below:
At the Equipment Interface Module (EIM)
1. Press and hold the CONNECT button on the EIM
until the CONNECTED LED glows amber (hold for
about 10 seconds).
2. Follow the prompts on the screen to connect the new
thermostat to the EIM. See page 10.
At the Portable Comfort Control
1. Press and hold the blank space (or arrow) in the
lower right hand corner of the screen until the dis-
play changes (hold for about 4 seconds).
Fig. 321.
2. Press REMOVE, then YES to disconnect from the old
thermostats.
3. To reconnect the thermostat, go to “Linking
RedLINK™ Accessories” beginning on page 16.
At the Indoor Sensor, RedLINK Internet
Gateway, Entry/Exit Remote, Vent-Filter
Boost Remote or TrueSTEAM Wireless
Adapter
1. Press and hold the CONNECT button on the acces-
sory until the status light glows amber (hold for
about 10 seconds).
2. To reconnect the thermostat, go to “Linking
RedLINK™ Accessories” beginning on page 16.
REPLACING AN EQUIPMENT
INTERFACE MODULE
When you replace an EIM, you must reset the RedLINK
accessories before connecting them to the new
thermostat.
Follow the instructions below:
At the thermostat
1. Press MENU, scroll down and select Installer
Options, enter the password (Date Code) when
prompted, scroll down and select Wireless Manager,
scroll down and select Remove Device, then select
This Thermostat.
2. Follow the prompts on the screen to connect the
thermostat to the new EIM.
Press and hold
the blank space
(or arrow may be
present)