Vornado AC500 User Manual

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12   English
How To Use
Automatic Dust Sensing Mode
This feature monitors the air quality of the room to detect the 
presence of particles, then adjusts the fan speed to improve 
air quality to optimum conditions. Press the Automatic Dust 
Sensing Mode Button to engage this feature. The screen will 
display the animated Automatic Dust Sensing icon (shown 
above), to indicate when this feature is active. The Dust Sen-
sor will continuously monitor the amount of airborne particles 
in the environment and adjust the fan speed between Low, 
Medium and High as needed to maintain optimum air quality. 
The Quick Clean speed is not utilized when Automatic Dust 
Sensing Mode is enabled.  Please note that Automatic Dust 
Sensing Mode is overridden when Sleep Mode is engaged to 
ensure the unit is providing a consistent, low noise level during 
nighttime sleep.
When To Use:
This feature allows the unit to reduce energy usage when 
fewer airborne contaminants are present in the room. Because 
active people and pets tend to stir up airborne particles, the 
unit will tend to increase speed during peak periods of activity 
in the room until lower readings are obtained. This feature is 
ideal for rooms where activity fluctuates greatly based on the 
time of day.
Note: The Dust Sensor will need to be cleaned periodically. 
Please refer to CLEANING AND MAINTENANCE on page 17.
Sleep Mode Setting 
This feature senses no light or low light conditions, and auto-
matically adjusts the unit to low speed.  Press the Sleep Mode 
button to engage this feature.  The Sleep Mode icon (shown 
above) will display. Ideal for use in bedrooms. Higher and more 
powerful speeds may be used throughout the day with lower 
speeds and minimal noise being preferable at night.  
Note: When in low light or no light, with sleep mode selected, 
the unit will only operate at low speed.  This will override Auto-
matic Dust Sensing Mode and high-speed settings.  In regular 
light, the unit will operate at the previous setting.