Effect Of Water Characteristics - Aprilaire 110 Owner's Manual

III. OPERATING INSTRUCTIONS- 110, 112, 220,
224, 350, 360, 440, 560, 760
Your new Aprilaire Humidifier is controlled by a manual humidistat
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 accordingly 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 merely reduce the setting to
25% several hours prior to the temperature change (see table 3).
The humidistat is a precision instrument that can be used to determine
the RH accurately in your home during the winter. Turn the dial to a lower
setting, then reverse the dial direction slowly until a "click" is heard. At
this point, read the RH on the dial. This will be very close to the actual RH
in your home.
IV. ADDITIONAL INFORMATION- ALL MODELS
To check the humidifier operation, set the Humidifier Control above the
click point, make sure that the water saddle valve is open and that there is
electricity to the unit. With all models except the 350 and 360 Aprilaire
Humidifiers, the furnace blower motor must be operating for the Aprilaire
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 setting below the click point and the unit should automatically shut off.
Be sure to keep fireplace dampers closed when not in use. They provide
an excellent escape route for heat, as well as humidity.
On occasion, indoor moisture producing activities such as clothes drying,
cooking, showers, etc., may raise the relative humidity level higher than it
should be, even though the Aprilaire Humidifier is not operating. Telltale
indications are condensation or frost on cold surfaces such as windows,
doors, walls, etc. If such condensation persists for several hours, your
home should be ventilated to dissipate the potential damaging excess
moisture levels.
V. EFFECT OF WATER CHARACTERISTICS
Your humidifier will operate effectively using either hot, cold, hard or
mechanically softened water. Whether to use available tap water, even
though it may be quite hard, or chemically softened water, is a common
concern to homeowners when installing a humidifier.
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