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—07 152
Wiring IAQ Equipment or a Heat/Cool Stage to the Universal Terminals
To Equipment Interface Module
“U” terminals can be used for humidification, dehumidification or ventilation.
Fig. 344. Wiring a powered humidifier.
Fig. 345. Wiring a powered ventilator.
Fig. 346. Wiring a powered dehumidifier (whole house
dehumidifer).
Fig. 347. Wiring a non-powered humidifier.
Fig. 348. Wiring a non-powered ventilator.
Fig. 349. Wiring a low speed fan for dehumidification.
1Any combination of universal relays (U1, U2, U3) can be used. They are set in the thermostat installer setup.
2Wire the universal EIM relay to the low speed fan for dehumidification control at the equipment. The EIM relay can be
set to be normally open or normally closed in the thermostat installer setup.
POWERED
HUMIDIFIER
RH
RC
R
C
U3
U3
U2
U2
U1
U1
24
VAC
120
VAC
24
VAC
120
VAC
24
VAC
1
POWERED
VENTILATOR
RH
RC
R
C
24
VAC
U3
U3
U2
U2
U1
U1
24
VAC
120
VAC
24
VAC
120
VAC
1
POWERED
DEHUMIDIFIER
RH
RC
R
C
U3
U3
U2
U2
U1
U1
24
VAC
120
VAC
24
VAC
120
VAC
24
VAC
1
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
RH
RC
R
C
24 VAC
U3
U3
U2
U2
U1
U1
NON-POWERED
HUMIDFIER
24
VAC
120
VAC
1
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
RH
RC
R
C
24 VAC
U3
U3
U2
U2
U1
U1
NON-POWERED
VENTILATOR
24
VAC
120
VAC
1
FIELD INSTALLED
JUMPER BETWEEN
R AND U1
RH
RC
R
C
24 VAC
U3
U3
U2
U2
U1
U1
OR
DEHUMIDIFICATION
WITH LOW SPEED FAN
24
VAC
120
VAC
1
2
Normally open, dry contacts
Normally closed, dry contacts