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
137 68-0311—02
Fig. 317. Inserting wires in thermostat terminal block.
Fig. 318. Inserting wires in EIM terminal block
IMPORTANT
Use 18–22 gauge thermostat wire.
Table 15. Wiring Diagrams by System Type.
System Type
Wiring Diagram
Reference
Standard Heat/Cool 319
Heat Pump with Auxiliary Heat 320
Geothermal radiant heat 321
Heat pump system with one transformer 322
2-heat / 2-cool conventional system with
one transformer
323
Heat pump system with two transformers 324
Geothermal radiant heat, geothermal
forced-air and backup heat with one
transformer
325
Heat pump with oil forced air backup. 331
Geothermal radiant heat with geothermal
forced air and backup heat using separate
transformer for the radiant heat
332
Wood stove-fired hot water fan coil with
forced air furnace backup heat
333
Hot water radiant heat with backup heat
(single zone application)
334
Hot water radiant heat with backup forced
air heat. Zoned with forced air zone panel
and zone valves
335
Hot water radiant heat with backup forced
air heat. Zoned with forced air zone panel
and hot water panel.
336
Hot water fan coil with forced air furnace
backup heat.
337
Wood stove with heat pump and backup
electric strips. (For applications in which
the thermostat only needs to run the
blower fan when stove is hot).
338
IAQ Equipment 339–344
Wired Remote Sensors 350–354
Table 16. Zoning Diagrams by System Type.
System Type
Wiring Diagram
Reference
Prestige IAQ thermostats with an HZ432
zone panel and no IAQ control
355
Prestige IAQ controlling one zone with an
HZ432 zone panel and a TrueSTEAM
humidifier
356
Ventilation with zoning 357
Prestige IAQ with an HZ432 zone panel
and a TrueDRY dehumidifier
358
Wallplate
R
C
Y
Y2
G
W
O/B
W2
AUX1
W3
AUX2
A
L/A