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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
designed not to 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
It is important to maintain proper indoor relative humidity
(RH). When the indoor RH is too low, the dry air can cause
wood furniture to dry and crack. Low humidity can also
lead to dry, cracked skin, as well as nose bleeds. When
the indoor RH is too high, the extra moisture may cause
condensation on the inside of windows (fogging or frost
on windows). Water may puddle on window sills and
floors. Recommended indoor relative humidity levels are
given in table 1 and on the front of the humidistat. For
example, when the outside temperature is 20°F, the
recommended indoor relative humidity (RH) is 35%.
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.
A manual humidistat is used to set desired indoor RH. The
humidistat controls the humidifier so that it introduces
humidity corresponding to the humidistat control knob
setting.
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, make sure that the
water saddle valve is open, there is power to the
humidifier and the furnace/air handler blower is running.
Turn the humidistat control knob to the OFF position.
Then, slowly turn the knob in the other direction, until you
hear a click from either inside of the humidistat or from the
humidifier solenoid valve. (If the RH in the immediate
vicinity of the humidistat is more than 45%, the humidfier
will not turn on.) After the humidifier has operated for
several minutes and water is coming out at the drain,
reduce the humidistat setting. Turn the knob to a point
below the click point. The humidifier should automatically
shut off. Now, set the humidistat dial at the recommended
inside RH, depending on the outside temperature.
It is important to watch for signs that the indoor relative
humidity (RH) level. If the level is too low or too high, the
humidistat control setting should be adjusted accordingly.
You should anticipate changes in the outdoor
temperature, so that you can adjust the setpoint prior to
a drop in the outside temperature. It takes time for the
humidifier to adjust the indoor relative humidity.
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.
