Setting The Desired Humidity Level - Aprilaire 1850F Installation And Operating Manual

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SETTING THE DESIRED HUMIDITY LEVEL

1. Press the ON/OFF button to turn the dehumidifier control ON. The display will show
the current setting, and the dehumidifier blower will turn on to start sampling the air.
2. 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 55%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.
Your comfort is the best measure of how to adjust your setting. When first installed,
your dehumidifier has to remove all the moisture that is initially in your home. The
home acts like a sponge so the moisture in the materials of your home is at the same
level as the air. After drying the air, the materials of the home will release moisture
back into the air until they are again at the same level. As a result, it is not uncommon
for the dehumidifier to operate for an extended period when first installed.
3. After three (3) minutes of sampling, the measured humidity will be compared to the setting:
a. If the humidity is above the setting, the dehumidifier compressor turns on and "AIR SAMPLING" will be replaced by "DEHUMIDIFYING".
The compressor remains on until the measured humidity falls 3% RH below the setting.
b. If the measured humidity is below the setting, the blowers turn off and the display returns to showing the RH setting.
4. The dehumidifier will sample again every 60 minutes, or at any time if the humidity setting is lowered.
Your dehumidifier is equipped with two features that protect against unwanted energy consumption. Defrost is a normal operating mode that
helps to prevent significant ice formation on the refrigeration system coil. The dehumidifier display will show "DEFROSTING" when operating
in this mode. This mode can occur when there is not enough air moving through the dehumidifier or if the temperature and/or humidity of
the incoming air is too low. The second protection feature is the E8 code. E8 on the dehumidifier display indicates that the air entering the
dehumidifier is below 50°F or above 104°F, or the dew point of the incoming air is below 40°F. There would be a significant reduction in
dehumidifier efficiency if the dehumidifier operated outside of these conditions. Low dew point conditions can be seen in some basements
or crawl spaces and usually occur in the Winter and Spring months. The dehumidifier continues to monitor the incoming air and when the
conditions are within the operating range, E8 will be removed from the display and dehumidification will begin as needed.
ENERGY SAVINGS TIPS
Energy Savings Tip #1: Adjust the humidity
setting to be as high as is comfortable to
reduce dehumidifier run time. If it feels
clammy or "smells musty", lower the humidity
setting. To save energy, turn the dehumidifier
to OFF when you open your windows, just as
you would with air conditioning.
Energy Savings Tip #2: If vacating your home
for an extended period in the summer, set the
RH at 55% and set your thermostat as high as
90-1853
you are comfortable setting it to in the cooling
mode. Consult with appropriate professionals
regarding the highest temperature that is safe
for your pets or possessions. This will keep the
humidity at a controlled level while minimizing
the amount of cooling energy used.
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