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 58
9080 Dehumidification
Control
Basic
Minimum On Time
High Humidity Comfort Reset
High Humidity Comfort Reset with
Minimum On Time
Reheat
Reheat with Minimum On Time
Basic Commercial No See “Dehumidification - Commercial”
beginning on page 109.
9090 Dehumidification
Minimum On Time
5 to 15 minutes
10 minutes Commercial No This option ensures that the compressor
runs long enough to effectively reduce
humidity when the cooling equipment is
cycled on. The compressor will run for the
“minimum on time” you set until the
desired humidity level is reached.
9100 High Humidity
Comfort Reset
Setting
1° F to 5° F
2° F Commercial No The thermostat uses the cooling system to
reduce humidity by lowering the
temperature up to 5° F below the current
cool setpoint until the desired humidity
level is reached.
The thermostat keeps the temperature
below the cooling setpoint until the desired
humidity level is reached.
9120 System Modes
Allowing
Dehumidification
Check box on screen for each:
Heat
Cool
Off
Cool
Default varies
based on
heating/cooling
equipment
selected
Both No This ISU is only displayed when ISU 9000
Dehumidification Equipment is set to
Dehumidifier.
Click boxes on screen to select which
system modes allow dehumidification. If a
box is NOT checked, the thermostat will
NOT allow dehumidification to operate in
that mode.
Heat: Includes Heat, Emergency Heat and
Auto. If the system is in Auto mode, the
thermostat will allow dehumidification if
the last call was for heat.
Cool: Includes Cool and Auto. If the system
is in Auto mode, the thermostat will allow
dehumidification if the last call was for
cool.
Off: The thermostat will allow
dehumidification when the system setting
is Off.
See “Dehumidification - Residential”
beginning on page 105 or
“Dehumidification - Commercial”
beginning on page 109.
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes