Bryant Thermidistat T6-PRH-A - Manual (Page 56)

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Humidify and Dehumidify Indicators
When the Display Module door is closed, the humidify icon will be displayed
when humidification is active and the dehumidify icon will be displayed when
dehumidification is active.
Auto Changeover
When auto changeover mode is selected, a change from heat to cool (or vice
versa) will not occur until an opposite mode demand has existed for 20 minutes.
If setpoint is changed, 20--minute requirement is deleted.
Emergency Heat Mode
When Thermidistat Control is configured as a heat pump and emergency heat is
selected, all Y signals are locked out, and W becomes energized upon a call for
heat.
Programmable Fan (programmable models only)
The fan output can be programmed based on period of the day. When
programming for each day and period the fan can be set to On or AUTO.
Dry Contact
On the programmable models, the dry contact that can be used for control of an
auxiliary device. The dry contact may be configured to be closed for a specific
number of minutes per hour for each period of the program schedule. This can
be used to operate a ventilator, damper, system blower, or other auxiliary device.
There are two terminals, D1 and D2.
On both the programmable and non--programmable models, when configured as
a dehumidify output, it will operate cooling equipment capable of dehumidify
function. When configured for dehumidification, the Rc terminal must be
connected to one of the dry contact terminals. The other dry contact terminal is
connected to the dehumidify terminal on the furnace or fan coil. This provides