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OPTIONAL – TWO ZONE DEHUMIDIFICATION
The dehumidifier can be installed to dehumidify just one area or zone
(i.e. the whole home) or, as shown in the illustration to the right, can
be installed to dehumidify two separate areas or zones (i.e. the home
and the basement) independently. Each zone can have its own humidity
level setting/control when installed with the Model 76 Control or Model
8910 Home Comfort Control
™
, or the two zones can share the same
setting/control. You and your installing contractor determine which zone
is the most important to control and this becomes the “Primary” zone
while the other is the “Secondary” zone. The dehumidifier will turn
on and open/close dampers to direct the dry air and satisfy the needs
of the Primary zone. If there is no demand from the Primary zone, the
Secondary zone will be dehumidified. Contact your installing contractor
for details about Primary/Secondary Zoned Dehumidification.
DAMPERS
TO
SECONDARY
ZONE
TO/FROM
PRIMARY ZONE
FROM
SECONDARY
ZONE
DAMPERS
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HOW DOES THE DEHUMIDIFIER WORK?
When the dehumidifier turns on, the blower circulates the air for three (3) minutes before measuring the
humidity level of the air. The green status light below the control setting flashes when the dehumidifier is
circulating the air. If the humidity of the air is higher than the setting, the compressor turns on and the green
Status light is lit continuously. The dehumidifier turns off after the humidity level of the air has dropped
below the setting.
OPTIONAL – HEATING AND COOLING SYSTEM BLOWER OPERATION
Your installing contractor may have configured the dehumidifier to turn on the heating and cooling system
blower when the dehumidifier turns on to allow for improved circulation of the dry air.
HOW DOES THE OPTIONAL VENTILATION WORK?
With the ventilation option installed (if you are unsure if this option has been installed, contact your installing contractor), the dehumidifier will
bring in outside air for the amount of time set on the Cycle Time adjustment during the set Cycle Period.
Your dehumidifier will work with your heating and cooling system blower to satisfy the ventilation requirements that have been set. For example,
if the Cycle Time is set for 20 minutes and the Cycle Period for 1 hour, you will get outdoor air introduced to your home for 20 minutes every hour.
When your heating and cooling system blower operates the dehumidifier blower will turn on and will open a normally-closed damper in the duct
that brings in outdoor air. If it is getting close to the end of the Cycle Period and your heating and cooling system blower has not operated, the
dehumidifier will turn on the system blower. Using the 20 minute per hour settings as an example, if the heating or cooling comes on for only
10 minutes, the dehumidifier control will turn on the system blower for the final 10 minutes of the 1-hour cycle period to deliver the required
amount of fresh air.
Outdoor air that is brought in will mix with the air circulating through your heating and cooling system. The dehumidifier will monitor the air in
your home and if the humidity level gets higher than the setting, it will turn on the compressor to remove the moisture.
An outdoor sensor, if installed with the ventilation option, will monitor the temperature of the outdoor air and if the temperature exceeds 100°F
(38°C) or drops below 0°F (-18°C) ventilation will not occur. If the outdoor temperature is between 20°F (-7°C) and 0°F (-18°C), ventilation will
only occur when your heating system operates.
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