Dry Contact Alerts - Honeywell TH8320R1003 Installation Manual

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Dry Contact Alerts

A Dry Contact device such as a wet switch can be connected
to the S1, S2, S3 or S4 terminals at the Equipment Interface
Module.
When the dry contact device detects a problem, the thermostat
displays an alert on the home screen. When the user touches
Press HERE for info on the Home Screen, the alert message
will be displayed.
Pressing Select displays options for addressing the Alert
message:
• View More Info
• Remind Me Later
• Dismiss
• View Dealer Info
To clear the Alert, (and turn off the Red Alert Light on the
thermostat), select Dismiss.
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.
68-0312—03
Fig. 155.
Fig. 156.
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
You can connect the S1, S2, S3 and 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. Dry
contact device can be normally open (shown in diagram) or
normally closed.
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.
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