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 54
8070 Humidification
Control
Humidify Only when Heat is On
Humidify Only when Fan is On
Humidify on Demand:
Thermostat Controls Fan
Humidify on Demand:
Humidifier Controls Fan
Defaults to
Humidify Only
when Heat is On
when ISU 8000
Humidifier Type
is Bypass or Fan
Powered
Defaults to
Humidify on
Demand:
Thermostat
Controls Fan
when ISU 8000
Humidifier Type
is Steam
Both No Humidify Only when Heat is On: The thermostat
turns on the humidifier only if the heat is
currently running.
Humidify Only when Fan is On: The thermostat
turns on the humidifier only if the fan is
currently running.
Humidify on Demand - Thermostat Controls
Fan: The thermostat turns on the humidifier
and the fan when humidification is needed.
Humidify on Demand - Humidifier Controls
Fan: The thermostat turns on the humidifier
when humidification is needed and the
humidifier controls the fan.
8080 Humidifier Lockout
Humidifier Allowed when Cool is
Running
Humidifier Not Allowed when Cool
is Running
Humidifier
Allowed when
Cool is Running
Both No
8095 Humidity Lockout
Dry Contact
Full drain pan
Water leak
None
None
Both Yes If the selected alert (full drain pan or water
leak) is detected, the thermostat will lock out
the call for humidity. This is only available if the
thermostat is configured to control a humidifier
and is set up to do a full drain pan and/or water
leak dry contact alert.
8100 Clean Tank / Water
Filter Replacement
Reminder
Off
60 Run Time Days
90 Run Time Days
6 Calendar Months
12 Calendar Months
Off Both No This ISU is only displayed if ISU 8000
Humidifier Type is Steam.
Run Time Days are not shown if ISU 8000
Humidifier Type is set to None.
8100 Humidifier Pad
Replacement
Reminder
Off
60 Run Time Days
90 Run Time Days
6 Calendar Months
12 Calendar Months
Off Both No This ISU is only displayed if ISU 8000
Humidifier Type is Bypass or Fan Powered.
Run Time Days are not shown if ISU 8000
Humidifier Type is set to None.
9000 Dehumidification
Equipment
Residential:
None
A/C with Low Speed Fan
A/C with High Speed Fan
Whole House Dehumidifier
Commercial:
None
A/C with Low Speed Fan
A/C with High Speed Fan
Hot Gas Bypass
Dehumidifier
None Both No See “Dehumidification - Residential” beginning
on page 105 or “Dehumidification -
Commercial” beginning on page 110.
9005 Dehumidification
Fan Speed Priority
Low speed fan with cool stage 1
only
Low speed fan always
User selectable
Low speed fan
with cool stage 1
only
Both Yes See “Dehumidification Fan Speed Priority”
beginning on page 105 for description.
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes