SP6551 manual - 71238 7/12/05 1:56 PM Page 8
Using Your Humidifier
Step 1
Be sure unit is full of water and plugged in.
Step 2
Set air flow control 
to desired setting.
Step 3
Set Humidity Control 
to medium position
(half way between 
and 
)
NOTE: Humidifier should operate with humid- ity control on the recommended medium set- ting. If it does not, the humidity is at a rela- tively high level. To test the unit under this condition, turn Humidity Control all the way clockwise and unit should begin to operate. After the unit has been tested, set Humidity Control to about medium or desired level.
Allow 24 to 48 hours for humidifier to adjust.
If humidity level in home is sufficient, the humidifier will only operate with Humidity Control turned all the way clockwise.
IMPORTANT: Water damage may result if condensation starts to form on windows or walls. Humidity Control setting should be lowered until condensation no longer forms.
Step 4
If humidifier stops running and the amber Fill Light 
is not illuminated, the green desired humidity light will illuminate. This means the humidity level is at the normal requirements for that setting or it is adjusting to the home conditions. The table below shows recom- mended indoor humidity levels. The figure below shows approximate relative humidity percentages which correspond to the various settings of the Humidity Control.
When Outdoor Recommended Indoor
Temperature is: Relative Humidity is: | ||
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20% | ||
2° F | 25% | |
10° F | 30% | |
20° F* | 35% | |
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* and above
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Relative Humidity
Operating Tips for Best Performance
1.Position the humidifier at least 2 inches from any wall and away from any heat reg- isters.
2.Do not restrict airflow from entering or exit- ing the humidifier.
3.Use liquid EPA Registered Bacteriostat to retard bacteria growth that may cause odors and may be harmful to your health.
4.Regular cleaning as instructed in “Cleaning Your Humidifier” section of this manual is recommended.
5.Replace the evaporative wicking filters at least once per humidification season or more depending on water conditions in your area.
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