TESTING HUMIDIFIER OPERATION
Checklist
Humidifier is level.
Control wiring was reviewed using circuit diagram.
Humidifier is plugged in.
Feed line has no kinks.
Drain line slopes continuously down and ends at floor drain.
Water hose inside humidifier is connected to PerfectFlow™ water distribution tray.
After installation use the following steps to check the humidifier operation:
1. Turn on the power and the water supply.
2. Turn the H8908 Humidistat to On and turn on the heat by setting the thermostat to 10ºF (6ºC) above room
temperature.
IMPORTANT
The furnace blower must be on to activate the humidifier.
3. Make sure that water is flowing out of the drain hose. If water does not flow, see Troubleshooting Your
Humidifier section.
4. Check for leaks.
5. Reset the thermostat and H8908 Humidistat to a comfortable setting for automatic operation.
OPERATION
How Your Humidifier Works
Your Resideo humidifier uses the principle that vapor (evaporated water) is created when warm air blows over a
water-soaked area. As the vapor circulates, the relative humidity rises.
Your humidity control monitors the relative humidity and activates the humidifier accordingly. The humidifier
has a water supply that dispenses water evenly over a humidifier pad. The warm dry air, from the furnace, passes
over the humidifier pad and picks up the moist air to circulate it throughout your home.
Humidified air feels warmer and more comfortable so you may be able to lower your thermostat heating
setpoint, which saves money on your heating fuel bills. The end result is that your humidifier gives you a
comfortable environment that is also energy efficient.
Controlling Your Humidity Settings
Your H8908 Humidistat controls your humidifier.
• Choose the humidity control setting using the combination of relative humidity/outdoor temperature setting
scale on your humidity control dial.
• Match the dial setting to the outdoor temperature to optimize the humidity level while reducing the moisture
condensation on your windows. See Table 2 to adjust the humidity control to the recommended setting.
NOTE: As the outside temperature drops, a lower humidity setting is recommended to accommodate dewpoint
effects. These settings should reduce the accumulation of moisture and ice on windows and other areas
of the home.
• Adjust the humidity control setting to adjust for indoor activities such as cooking, showering and clothes
drying, which can cause excessive levels of humidity that can accumulate moisture on your windows.
NOTE: If these activities persist for more than a few hours, set the humidity control to the lowest setting to turn
off the humidifier. If the condition does not improve, ventilate your home to remove the moisture.
Table 2. Setting Your Humidistat.
When Outside
Temperature is:
-20°F (-29°C)
-10°F (-23°C)
0°F (-18°C)
+10°F (-12°C)
+20°F (-7°C)
Above 20°F (-7°C)
HE360 HUMIDIFIER AND INSTALLATION KIT
Use This Control
Setting:
15
20
25
30
35
40
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