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
61 68-0311—02
10120 Ventilation Percent
On Time
10% to 100% (in 10%
increments)
30% Both No The thermostat operates ventilation
equipment based on a percentage entered
in the installer setup (ISU 10120). For
example, if Percent on Time is set to 50%,
the ventilation equipment will run at
random times during a 1 hour period until
it reaches a 50% run time (approximately
30 minutes).
10125 Ventilation Priority
Lockouts are Priority
ASHRAE is Priority
Lockouts are
Priority
Residential No Lockouts are Priority: The thermostat
places a priority on lockouts versus the
ASHRAE 62.2 ventilation standard. The
thermostat will not run ventilation during
the following lockout conditions (if
configured) unless you manually call for
ventilation:
• Lockout Ventilation during Outdoor
Conditions (ISU 10130)
• Lockout Ventilation on Humidification or
Dehumidification Calls (ISU 10140)
• Lockout Ventilation during “Sleep”
(Residential) or “Unoccupied” (Commercial)
program periods. Note: This option is set by
the user on the Ventilation screen in the
Menu.
ASHRAE is Priority: ASHRAE requires
additional ventilation following a long off
cycle. The thermostat meets the ASHRAE
62.2 ventilation standard by running
additional ventilation when outdoor
conditions are favorable. If ASHRAE cannot
be met when outdoor conditions are
favorable, the thermostat will override the
outdoor lockouts and run ventilation. When
using this option, it is recommended to
increase the rate (CFM) of the ventilation
equipment to meet the ASHRAE 62.2
ventilation standard in a shorter run time.
Notes:
• ISU 10140 “Lockout Ventilation on
Humidification or Dehumidification Calls” is
not an option when you select “ASHRAE is
Priority”.
• The ability to lockout ventilation during the
“Sleep” or “Unoccupied” program periods is
not an option when you select “ASHRAE is
Priority”.
10130 Ventilation Low
Temperature
Lockout
Off
-20° F to 40° F (in 5° F
increments)
Off Both No Requires an outdoor sensor.
This ISU is only displayed when ISU 10000
Ventilation Type is set to ERV / HRV or
Fresh Air Damper.
See “Ventilation — Outdoor Condition
Lockouts (ISU 10130)” beginning on
page 113.
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes