Carrier Humidifier Owner's Manual page 8

To check the humidifier'soperation, note the current setting
andset the HumidiTrad MControlto the Test modewhen the furnace
blower motor is operating.Water will flow into the humidifierfor
1 minute andthen it will turn off. This insures the humidifier is
operatingproperly. Do not leavethe control in the test mode as it
wilt not operate.Resetthe control to it's original setting.
Note: Turningthe knobto "Test" resets the HumidifierPad Change
Indicator timer.
Manual HumidifierControlor HumidiTrac
TM
in Manual Mode:
(for Automatic Humidifier Control- see page 6)
Your humidifier is controlled by a humidifier control installed either
in the living area (typically near the thermostat) or in the cold air return.
It is important to anticipate a drop in outdoor temperature and reduce
the setting accordingly to avoid excessive condensation. For example,
with an outdoor temperature of 20°F (-7%) the correct setting will be
35% relative humidity_If the temperature is expected to fall to O°F
(-t8%) that evening, then merely reduce the setting to 25%several
hours prior to the temperature change.
The recommended settings on the humidifier control are based on
years of research (see Table 3) and experience as to what is best for
the average home.These settings represent a compromise between RH
levels that would be most desirable for comfort reasons and humidity
levels that are suitable for protection of your home. For example, a
wintertime indoor RHof 50%may be considered ideal by some, but
unfortunately, it probably would result in damage to your home.
Observance of the recommended RH levels on your humidifier control,
therefore, is an important safeguard. Condensation of water on inside
windows in the form of fogging or frost is usually an indication that the
relative humidity is too high_This same condensation can take place in
other areas in your home with the possibility of damage resulting.
+40°F (4%)
+30°F (-1°C)
+20°F (-7°C)
+10OF (-12°C)
O°F(-18°C)
-tOOF (-23%)
-20OF (-29°C)
45%
4O%
35%
30%
25%
20%
15%
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