Spec Sheet

THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
95 68-0311—07
Fig. 185.
When the user presses the alert for more info, the
Notification screen is displayed, prompting them to
contact their dealer. See Fig. 186 as an example.
Fig. 186.
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.
Get Connected Alert
This alert will inform homeowners about the RedLINK
Internet Gateway so they can control their thermostat
using the My Total Connect Comfort app from their phone,
tablet, or PC. The alert only appears if the thermostat has
been installed without a RedLINK internet gateway
enrolled for 14 consecutive days. The alert can be snoozed
or permanently dismissed by the homeowner.
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 volt-
age.
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.