Bryant IIT6-WEM-02 Installation Instructions Manual page 26

WIRING DIAGRAMS (Cont.)
Accessory Devices
The thermostat can control an accessory HVAC device like a
humidifier, dehumidifier, or ventilation device from its dry contact
ACC terminals (The ACC terminals do not provide 24V AC output).
If the accessory is internally powered, connect the 24V to ACC+. Also
connect the common for the accessory to common on the control
board.
24V
C
Accessory Device
Only needed if your accessory device is self-powered.
Note: You will need to configure the accessory device when you first power
on your thermostat.
Fig. 14 - - Accessory Device Connection
ACC+
ACC-
Thermostat Terminals
A14505
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