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CHANGING THE HUMIDITY SETTING
• T he first press of either the
or
• E ach subsequent push of the up or down buttons will change the setting by 1%.
• I f a button is held down, the setting will continually change by 1% every 1/2 second for as
long as the button is pressed.
• T he control will exit the humidity setting screen 5 seconds after the last button press/release.
FIGURE 4 – UP/DOWN Buttons
HOW DOES THE CONTROL WORK?
• W hen the measured humidity is greater than the setting, the control will turn on the
dehumidifier and ON will blink on the LCD display.
• W hen the measured humidity falls 3% below the setting, the control will turn off the
dehumidifier and ON will stop blinking, but remain displayed on the LCD.
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button will display the humidity setting on the LCD.
FIGURE 5 – Humidity Setting Screen
CONTROL LIMITS
The control limits are used to make sure the dehumidifier does not run when conditions are
outside of the operating limits. Dehumidifiers are not as effective when conditions are outside
of the operating limits. For example, the dehumidifier will not remove much moisture when
conditions are cool and dry. Control limits allow the dehumidifier to work efficiently within the
operating range and turn off when conditions are outside of these limits.
• D ew Point Lower Limit: 40°F
• T emperature High Limit: 99°F
SEQUENCE OF OPERATION
• T he dehumidifier will turn off if one of the control limits has been exceeded.
• I f the control measures a dew point below 40°F OR a temperature above 99°F, the control
will deactivate the dehumidifier output if actively dehumidifying, the dehumidifier will stop
dehumidifying, and ON and
• T he control will resume normal operation when conditions fall back within the control limits.
90-1637
CLEANING THE CONTROL
The surface of the Model 75 Dehumidifier Control can be cleaned with water or a non-abrasive
household cleaner, including glass cleaner. Do not spray any liquid directly onto the
control. Spray water or a cleaner onto a soft cloth and gently wipe the surface of the control.
*
will blink on the LCD screen (see Figure 2).
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