The relative humidity in your home will now be accurately controlled to meet your needs and should not need further adjustment during future heating seasons. Make note of the dial setting in the event you temporarily move the knob when performing annual maintenance of the Aprilaire Humidifier.
FIGURE A
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1
AUTOMATIC MODE
Your Aprilaire Automatic Humidifier, is a high precision system that will accurately maintain the relative humidity in your home. For every 1° change in outdoor temperature, the control will automatically adjust the indoor relative humidity (RH) by 1/2%. If you would like to determine the RH in your home, follow these steps:
1.Determine the outdoor temperature.
2.Activate the furnace blower by setting your thermostat to a higher temperature.
3.Turn the control dial setting to the “Off” position. Then, slowly turn the dial clockwise until you hear the solenoid valve “click on.” Next, slowly turn the dial counter clockwise until you hear the solenoid valve “click off”. At this point, make note of the dial setting.
4.Locate your dial setting on Table 2. Follow the dial setting to the right until it intersects with the current outdoor temperature. This is the relative humidity in your home under existing conditions.
5.Return the thermostat and the Humidifier Control to their original settings.
The Automatic Humidifier will accurately control the humidity in your home to a maximum of 45% RH and a minimum of 10% RH. The values of outdoor temperature and dial settings may fall in between or outside of the listed values in Table 2. In these cases, you can only approximate your home’s actual indoor RH.
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