Carrier P/N 33CSHUMID-01 Owner's Manual page 2

Overview
This unique accessory allows you to view and control
the humidity level using only your thermostat and
HVAC unit.
Depending on the model number of your thermostat
the humidification options are:
View the ambient humidity at the thermostat
location
Control a humidifier with the HUM terminal on
the thermostat
Dehumidify using only the air conditioner
Dehumidify with Reheat using your HVAC's
second stage electric strip heater
Dehumidify using the DEHUM terminal on your
furnace's circuit board
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