Indoor Air Quality Functions; Humidity Control; Automatic Mode - Aprilaire 8920W Owner's Manual

INDOOR AIR QUALITY FUNCTIONS

HUMIDITY CONTROL

This thermostat can control the relative
humidity (RH) in your home when you
have an additional humidifier and/or
dehumidifier installed . Dehumidification
can be achieved one of two ways, either
with a whole-home dehumidifier or with
your air conditioning equipment . See page
24 for details . If a humidifier is installed,
it can be controlled in one of two modes,
Automatic or Manual . These settings are
configured by your installer .

Automatic Mode

In automatic mode, you will receive an
optimal amount of humidity so that your
home and its furnishings are protected
from the damaging effects of excessively
high or low humidity during the heating
season . The thermostat automatically
adjusts your home's RH based on the
outdoor temperature . This temperature is
measured by a sensor attached outside
your home .
The humidity setting needs to be set
initially to meet your home's conditions .
Please follow these steps when adjusting
your control .
1.
Humidity Control
Touch to open the
Humidity Control Select screen .
2.
Touch Humidifier to open the
Humidifier Control screen .
3.
The normal humidity range is 3-5 . Use
setting 3 initially .
During the next 24-48 hours, it may be
necessary to adjust the setting for more or
less humidity, depending on your personal
comfort and home's requirements .
During the coldest portion of your first
heating season, minor adjustments
may be necessary to prevent window
condensation . This will depend on your
home's construction .
The relative humidity in your home will
then be accurately controlled to meet
your needs and should not need further
adjustment during future heating seasons .
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