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—02 114
4. Select the Ventilation Fan Control. See “Ventilation Fan
Control (ISU 10060)” on page 113 for more information.
See Fig. 251.
NOTE: ISU 10060 is only displayed if the Ventilation
Type is ERV / HRV. The thermostat controls the
fan if the Ventilation Type is Fresh Air Damper.
Fig. 251.
5. If ASHRAE was selected for ISU 10050, select the Num-
ber of Bedrooms and Size of House. See Fig. 252.
Fig. 252.
6. If ASHRAE was selected for ISU 10050, enter the Equip-
ment Ventilation Rate (CFM). Be sure this setting corre-
sponds with the actual ventilator speed. This setting
determines how often the ventilation equipment will oper-
ate to meet the ASHRAE 62.2 Standard. The thermostat
will indicate the following based on the Equipment Venti-
lation Rate, Square Footage and Number of Bedrooms.
See Fig. 253.
• Provides an indication if it meets or does not meet the
ASHRAE 62.2 Standard.
• Provides% run time that is needed to meet the
ASHRAE 62.2 Standard.
Fig. 253.
7. Select a Ventilation Priority (see Fig. 254):
c. Lockouts are Priority: The thermostat places a pri-
ority on lockouts versus the ASHRAE 62.2 ventilation
standard. The thermostat will not run ventilation dur-
ing the following lockout conditions (if configured)
unless you manually call for ventilation:
(1) Lockout Ventilation during Outdoor Conditions
(ISU 10130)
(2) Lockout Ventilation on Humidification or Dehu-
midification Calls (ISU 10140)
(3) Lockout Ventilation during “Sleep” (Residential) or
“Unoccupied” (Commercial) program periods.
Note: This option is set by the user on the Ventila-
tion screen in the Menu.
d. ASHRAE is Priority: ASHRAE requires additional
ventilation following a long off cycle. The thermostat
meets the ASHRAE 62.2 ventilation standard by run-
ning additional ventilation when outdoor conditions
are favorable. If ASHRAE cannot be met when out-
door 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.
NOTE: ISU 10140 “Lockout Ventilation on Humidifica-
tion 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 Prior-
ity”.
Fig. 254.