Bosch BCC100 User Manual page 27

Humidifier/Dehumidifier
Operating Mode
The user may select either
humidifier/dehumidifier as
an optional accessory if
the wire was properly
installed during the initial
installation process. The
humidifier mode will be turned on during heating
operation and dehumidifier mode will turn on during the
cooling operation if the necessary humidity level is not met.
You may only operate in
either humidifier OR
dehumidifier mode and
may not operate in both
modes at the same time.
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