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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
68-0311—01 58
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 or S2 terminals.
IMPORTANT
The dry contact device must be rated for low voltage.
1. Wire the dry contact device to S1 or S2 terminals at the
EIM.
NOTE: You can connect multiple Dry Contact devices in
parallel to the S1 or S2 terminals. For example,
you can have a variety of dry contact devices con-
nected to the S1 terminals and if any one of them
is triggered, the thermostat will display an alert on
the home screen. You may want to use the Dry
Contact “Custom Alert” when using multiple Dry
Contact devices on one set of terminals.
Fig. 84. Wiring two dry contact devices.
2. Enter Installer Setup (see “Installer Setup” beginning on
page 14).
3. Dry Contacts are selected at ISU 6000. Select the appro-
priate Dry Contact(s) and press Next.
Fig. 85.
4. Select the terminals wired to the Dry Contact device, and
press Next.
Fig. 86.
5. Select Normally Open or Normally Closed, and press
Next.
MULTIPLE DRY CONTACT DEVICES
ON ONE SET OF TERMINALS
EIM
M31488
ONE DRY CONTACT DEVICE