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1. Run the two-strand thermostat wire from the
humidifier to the humidistat, and from the humidis-
tat to the sail switch.
2. Cut lengths of thermostat wire to reach between
components, leaving adequate wire at both ends
for connections.
NOTE: Humidistat and sail switch can be wired in any
order.
3. At the humidifier, connect the black and white con-
ductors to the two yellow humidifier wires. (The red
wires from the humidifier are not used.)
4. At the humidistat, connect both black conductors to
the two humidistat terminals. Use a wire nut to con-
nect together the two white conductors.
5. At the sail switch, connect the black and white con-
ductors to the Com and NO sail switch terminals
(NC terminal is not used).
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 Honeywell 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.
HE220, HE260 HUMIDIFIER AND INSTALLATION KIT
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 accommo-
date 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 set-
ting 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)
7
Use This Control
Setting:
15
20
25
30
35
40
69-1645EF
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