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IV. Annual Maintenance
For best performance, we recommend that you replace the evaporative
media in your humidifier annually.
•
Call the installer of your humidifier. This information is often found on your
equipment.
V. Annual Summer Shutdown
FOR THE SUMMER HUMIDIFIER SHUTDOWN, SIMPLY TURN THE
HUMIDISTAT CONTROL TO THE “OFF” SETTING AND CLOSE THE DAMPER
IN THE BYPASS HUMIDIFIER.
VI. Periodic Preventative Maintenance
NOTE
: Periodic inspection and preventative maintenance of your total heat-
ing system is important for efficient and safe operation. Your dealer will include
humidifier service during a maintenance inspection.
Your humidifier is equipped with an in-line water strainer and orifice as
shown below. These parts should be inspected and cleaned periodically to
assure continued proper unit performance.
3
II. Operating Instructions
Your new humidifier is controlled by a manual humidistat, HumidiTrac
™
or
Thermidistat
™ ,
installed either in the living area or in the cold air return. It is
important to anticipate a drop in temperature and reduce the setting according-
ly to avoid excessive condensation. For example, with an outside temperature
of 20° the correct setting will be 35% relative humidity. If the temperature is
expected to fall to 0° that evening, then reduce the setting to 25% several hours
prior to the temperature change.
Observance of the recom-
mended relative humidity level
on your humidistat (see table)
is an important safeguard.
Condensation of water on inside
windows in the form of fogging
or frost is usually an indication
of excessive relative humidity.
The same condensation can
take place in other areas in
your home with the possibility of resulting damage.
Be sure to keep fireplace dampers closed when not in use. They provide an
excellent escape route for heat, as well as humidity.
The humidistat can be used to determine the relative humidity in your home
during the winter. Turn the dial to the lower setting then reverse the dial direc-
tion slowly until a “click” is heard. At this point, read the relative humidity on the
dial. This will be very close to the actual relative humidity in your home.
To check the humidifier operation, set the humidistat above the click point,
make sure that the water saddle valve is open and that there is electricity to the
unit. The furnace blower motor must be operating for the humidifier to function.
After the humidifier has operated for several minutes and water is entering the
unit and coming out at the drain, reduce the humidistat setting below the click
point and the unit should automatically shut off. Now, set the humidistat dial at
the recommended inside relative humidity, depending on the outside tempera-
ture. Follow the suggested settings prior to a drop in the outside temperature.
III. Effect of Water Characteristics
Your humidifier will operate effectively using either hard or mechanically
softened water.
Any type of water (hard, soft, hot, or cold) is acceptable for use with the
drain-type humidifiers. Hot supply water, 140° maximum, is recommended for
all heat pump applications. The use of hot supply water will also increase the
amount of humidity generated in other applications. The heat in the water
increases evaporation and the water going to the drain is cold to the touch.
OUTDOOR-INDOOR RELATIVE HUMIDITY TABLE
Outside Temperature
Recommended R.H.
+40°
45%
+30°
40%
+20°
35%
+10°
30%
0°
25%
–10°
20%
–20°
15%
