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 96
When the user presses the alert for more info, the Notification
screen is displayed, prompting them to contact their dealer.
See Fig. 185 as an example.
Fig. 185.
The following dry contact alerts are available.
Full Drain Pan Alert
When the dry contact device detects that the condensate drain
pan is full, the thermostat provides an alert to the user.
NOTE: If you want the compressor to turn off when the
drain pan is full, wire the system so the dry con-
tact device turns off the compressor when the
drain pan is full.
Dirty Filter Alert
When the dry contact device detects a dirty air filter (pressure
drop across the filter), the thermostat provides an alert to the
user to replace the filter.
Water Leak Alert
When the dry contact device detects a water leak, the
thermostat provides an alert to the user.
System Shutdown Alert
When the dry contact device detects a critical problem with the
system, the thermostat provides an alert to the user indicating
that the system was shut down.
When the dry contact device detects a problem with the
system (for example, smoke detection), the thermostat will not
call for heating, cooling, fan or IAQ equipment until the dry
contact is deactivated or the feature is unconfigured at the
thermostat.
Service Needed Alert
When the dry contact device detects an issue that requires
service, the thermostat provides an alert to the user.
Fan Failure Alert
The Fan Failure Alert protects the equipment when there is no
airflow. When the dry contact device (for example, sail switch)
detects no air flow for 5 minutes after a call for forced air heat,
cool, or fan, the thermostat provides an alert to the user
indicating that the system was shut down due to a lack of
airflow.
The thermostat will call for the fan and lockout all other
equipment until the dry contact device senses air flow again or
the feature is unconfigured at the thermostat.
Custom Alert
Allows the dealer to enter a custom alert to be displayed when
a dry contact device is activated. For example, a float switch
can detect when your sump pump is not working.
Set Up the Dry Contact Alerts
WARNING
Equipment Damage Hazard.
Do not apply power to S1, S2, S3, or S4 terminals. Do
not connect a temperature sensor to the S1, S2, S3, or
S4 terminals if setup for a dry contact device.
IMPORTANT
The dry contact device must be rated for low voltage.
NOTE: You can connect multiple Dry Contact devices in
parallel to the S1, S2, S3, or S4 terminals.
You can connect the S1, S2, S3, or S4 terminals on the EIM to
a dry contact device to display an alert. Dry contact alerts
include Full Drain Pan, Dirty Filter, Water Leak, System
Shutdown, Service Needed, Fan Failure and Custom Alert. A
dry contact device can be normally open (shown in diagram) or
normally closed.
Fig. 186. Wiring dry contact devices.
MULTIPLE DRY CONTACT DEVICES
ON ONE SET OF TERMINALS
EIM
ONE DRY CONTACT DEVICE
MULTIPLE DRY CONTACT DEVICES
ON ONE SET OF TERMINALS
EIM
ONE DRY CONTACT DEVICE
S4
S4
S3
S3