THX9321 & THX9421 Product Data
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
91 68-0311—02
Delta T Alerts are also displayed for performance related
issues such as dirty air filter, blocked registers, loss of
refrigerant, dirty a-coil, frozen a-coil, cracked heat exchanger,
dirty burners, burners need adjustment, etc.
Alerts are displayed to the user on the home screen. See Fig.
160 for an example.
Fig. 160.
When the user presses the alert for more information, the
Notification screen is displayed, prompting them to perform
some basic troubleshooting and, if the problem persists,
contact their dealer. See Fig. 161 as an example.
Fig. 161.
Alerts are also recorded in the Alerts Log. See “Data Logs”
beginning on page 91.
Delta T Alerts and Utility Saver
Switches
For systems that might be interrupted by a utility saver switch
(conventional cooling and heat pumps in the heat and cool
mode), the thermostat will ask if a utility saver switch is
installed and provide an option to the user to turn off
diagnostics temporarily while power is interrupted by the utility
company. Diagnostics can be turned off for 1-14 days.
Fig. 162.
Fig. 163.
Data Logs
The Data Logs collect system information that can help point a
service technician in the right direction when troubleshooting.
When accessing the Data Logs, the installer can turn off each
log, delete current log entries, and save Data Logs to a
memory stick via the USB port. See “Using the Data Logs”
beginning on page 94 and “To save a Data Log to a memory
stick” beginning on page 95 for more information.
Data Logs include the Alerts Log, User Interactions Log, and
Performance Logs.