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5
When Outdoor
Temperature is:
°F ° C
Recommended
Indoor Relative
Humidity (RH) is
-20
-10°
2°
10°
20°
30°
-30°
-24°
-18°
-12°
-6°
-1°
15 - 20%
20 - 25%
25 - 30%
30 - 35%
35 - 40%
40 - 45%
*Model 1990 digital hygrometer is available for purchase by calling 1-800-547-3888.
NOTE: External hygrometer readings and humidistat readings may differ. Humidity
levels can vary significantly even in one room.
OPERATION
Plug cord into wall receptacle. Your humidifier is now ready for use. The humidifier should
be placed at least FOUR inches away from any walls and away from heat registers.
Unrestricted airflow into the unit will result in the best efficiency and performance.
NOTE: This unit has an automatic humidistat located on the cord that senses the
humidity level around the immediate area of the humidifier. It turns the humidifier on
when the relative humidity in your home is below the humidistat setting and will turn
the humidifier off when the relative humidity reaches the humidistat setting.
CONTROL PANEL
TO TURN ON/OFF
For initial operation, plug the unit in
(the display will show - -). Press the
speed button and hold for 5 seconds to
turn the unit on or off.
FAN SPEED
The D46720 has a four speed digital
control panel.
1) Press the SPEED button to adjust the
fan speeds.
2) The speeds: High (F4) - Low (F1)
display on the digital panel.
HUMIDITY CONTROL
3) The hygrometer on the cord reads the current room humidity and displays the
percentage on LCD panel.
4) To set the desired humidity, press the HUMIDITY button. Each successive push
increases the humidity in 5% increments. The range is 25% to 65%.
5) At 65% the humidifier will run constantly until it runs out of water.
NOTE: If excessive condensation occurs, reduce fan to a lower speed setting.
REFILL INDICATION
1) When the unit is out of water, the motor shuts off
and a flashing F will display on the display panel.
NOTE: The motor will turn on again when unit is refilled.
Water
Refill
Display
CHECK FILTER
T
he ability of any humidifier to efficiently supply humidity output relies heavily on the
c
ondition of the filter. As the filter loads with impurities it gradually loses its wicking
c
apability. When this happens, moisture output is reduced and the humidifier has to
w
ork longer to satisfy the selected setting.
HUMIDITY
PRESS TO SET
RANGE
25% - 65%
SPEED
PRESS TO SET
HOLD FOR OFF
FAN SPEED
BUTTON
HUMIDITY
CONTROL
BUTTON
DIGITAL DISPLAY
IMPORTANT: Water damage
may result if condensation
starts to form on windows or
walls. Humidity SET point
should be lowered until
condensation no longer forms.
We recommend room humidity
levels do not exceed 50%.
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