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During humidifier operation, a steady stream of water
flows to the drain. This water flushes away minerals and
other particles of solid residue. Some particles are
trapped by the humidifier pad. This eliminates the white
dust" which is often mentioned in complaints about other
systems. The water flow and drain design also eliminate
problems caused by stagnant water.
The humidifier pad must be in good condition to assure
trouble−free performance. It should be changed at least
annually.
All humidifier parts that come in contact with water are
non−metal and will never rust or corrode. Neither heat nor
water will affect the humidifier components under normal
operating conditions.
HCWB2−12 and −17 and HCWP2−18
Operating Instructions
HCWB2−12 and −17 and HCWP2−18 humidifiers are
controlled by a manual humidistat, which is installed
either in the living area or on the return air plenum.
It is important to keep the humidistat setting at the
recommended level in order to avoid excessive indoor
RH. This will prevent the formation of condensation on
inside windows (fogging or frost on windows). For
example, with an outside temperature of 20ºF the correct
setting will be 35% RH. If the temperature is expected to
fall to 0ºF that evening, then adjust the setting to 25%
several hours prior to the temperature change.
The manual humidistat can be used to determine the RH
in your home during the winter. Turn the dial to the lowest
setting, then reverse the dial direction slowly until you
hear the solenoid valve click on. At this point, read the RH
value on the dial. This will be very close to the actual RH
in your home.
FIGURE 1
CONTROL
KNOB
MANUAL HUMIDISTAT
TABLE 1
Relative Humidity (RH) Settings
Outside Temperature
(Fahrenheit)
Recommended RH
+40
°
45%
+30
°
40%
+20
°
35%
+10
°
30%
0
°
25%
–10
°
20%
–20
°
15%
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 power 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 RH,
depending on the outside temperature. It is important to
anticipate changes in the outdoor temperature and to
adjust the setpoint prior to a drop in the outside
temperature.
Be sure to keep fireplace dampers closed when not in
use. Chimneys provide an excellent escape route for
heat, as well as humidity.
HCWB2−12A and −17A and HCWP2−18A
Operating Instructions
HCWB2−12A and −17A and HCWP2−18A humidifiers are
controlled by a universal humidifier control, which offers
two modes of operation: automatic and manual. When
installed in the automatic mode the system benefits you
in the following ways:
1 − The control automatically adjusts your home’s RH
based on the outdoor temperature.
2 − The control eliminates the need to manually adjust
the control.
3 − The universal humidistat precisely controls the RH in
your home, ensuring maximum comfort for a greater
percentage of time. The universal humidistat also
prevents excess condensation or low humidity in the
home.
4 − The universal humidistat eliminates the need to turn
the dial setting to
OFF
during the summer season.
Automatic Mode
Immediately after installation, the universal humidistat
must be set to match your home’s condition. Follow these
