(Table 3) Outdoor-Indoor Relative Humidity
Outside Temperature | Recommended RH |
|
|
+40° | 45% |
+30° | 40% |
+20° | 35% |
+10° | 30% |
0° | 25% |
20% | |
15% | |
|
|
tion of too high relative humidi- ties. This same condensation can take place in other areas in your home with the possibility of dam- age resulting.
The humidistat is a precision instrument that can be used to determine the RH accurately in your home during the winter. Turn the dial to the lower setting, then
(Figure B)
MANUAL MODE
reverse the dial direction slowly until you hear the solenoid valve “click on”. At this point, read the RH on the dial. This will be very close to the actual RH in your home. (See Figure B)
To check the humidifier operation, set the knob to “test”, make sure that the water saddle valve is open and that there is electricity to the unit. Generally, the furnace blower motor must be operating for the Aprilaire Humidifier to function. After the humidifier has oper- ated for one minute and water is entering the unit and coming out at the drain, reduce the humidistat setting to the recommended inside relative humidity, depending on the outside temperature. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE. Follow the suggested settings prior to a drop in the outside temperature.
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