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
68-0311—02 24
2010 Heating Equipment
Type
Conventional Forced Air Heat:
Standard Efficiency Gas Forced Air
High Efficiency Gas Forced Air
Oil Forced Air
Electric Forced Air
Hot Water Fan Coil
Other
Heat Pump:
Air to Air Heat Pump
Geothermal Heat Pump
Geothermal Radiant Heat
Radiant Heat:
Hot Water Radiant Heat
Geothermal Radiant Heat
Steam
Other
Other:
Gravity
Other
Default varies
based on
previous
selections
Both No Cycle Rate and Fan Operation automatically
default to the correct settings based on the
equipment type selected.
This ISU is not displayed when ISU 2000
Heating System Type is set to None (Cool
Only).
See “Geothermal Radiant Heat” beginning
on page 100.
2030 What Terminals are
Wired to Radiant
Heat?
None
U1
U2
U3
Default varies
based on
previous
selections
Both No This ISU is only displayed when ISU 2010
Heating Equipment Type is Geothermal
Radiant Heat.
Geothermal Radiant Heat must be wired to
a universal terminal (U1, U2, or U3).
U1, U2 and U3 are normally open dry
contacts when configured for a stage of
Heat. U1, U2 and U3 require power from
the system transformer or a separate
transformer.
U3 is only available on the Equipment
Interface Module (EIM).
2040 What Terminals are
Wired to Radiant
Heat - Stage 2?
None
U1
U2
U3
Default varies
based on
previous
selections
Both No This ISU is only displayed when ISU 2010
Heating Equipment Type is Geothermal
Radiant Heat.
Geothermal Radiant Heat must be wired to
a universal terminal (U1, U2, or U3).
U1, U2 and U3 are normally open dry
contacts when configured for a stage of
Heat. U1, U2 and U3 require power from
the system transformer or a separate
transformer.
U3 is only available on the Equipment
Interface Module (EIM).
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes