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SETTING THE DESIRED HUMIDITY LEVEL
The dehumidifier on-board control will display the humidity setting when not running, and displays
the measured humidity when running.
The UP and DOWN arrow buttons allow the humidity level to be set from 40% to 80% relative
humidity. Use the ON/OFF button to turn the dehumidifier ON or OFF.
Set the control at 59%RH when first installed. Allow the dehumidifier to run until it reaches the
setting before deciding if you want to change the setting.
• If you prefer the air to be more dry, decrease the humidity setting.
• If you prefer the air to be less dry, increase the humidity setting.
EXTERNAL CONTROL OPTIONS
Your Aprilaire dehumidifier can be controlled with an optional Aprilaire Model 76 Control. Install the
Model 76 in your living space and make changes to the dehumidifier setting or find out what the humidity
level is in the crawl space from the comfort and convenience of the living space. Refer to the Model 76
Owner’s Manual for operating instructions. Aprilaire owner’s manuals are available at www.aprilaire.com.
If you are interested in having an external control installed, please consult your installing contractor.
HOW DOES THE DEHUMIDIFIER WORK?
When the dehumidifier turns on, the blower circulates the air for 3 minutes before measuring the
humidity level of the air. The on-board control will display AIR SAMPLING, along with the measured
humidity on the control screen.
If the humidity of the air is higher than the setting, the compressor turns on and the control will display
DEHUMIDIFYING, along with the measured humidity on the control screen.
90-1854
90-1854
Once per hour the dehumidifier will measure the humidity level of the air and compare it to the humidity setting. If the humidity in your crawl
space is higher than the setting, the dehumidifier will dehumidify the air until the humidity level drops 3%RH below the setting.
90-1853
Model 76 Control
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