Operating Instructions - Model 500; Effect Of Water Characteristics - Aprilaire 600 Owner's Manual

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OPERATING INSTRUCTIONS – MODEL 500
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. To determine the RH level in your home,
follow Steps 1 & 2 on page 6.
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ADDITIONAL INFORMATION FOR ALL MODELS
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, again, 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.
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EFFECT OF WATER CHARACTERISTICS

Whether to use available tap water, even though it may be quite hard, or
chemically softened water, is a common question homeowners have when
their dealer is installing a humidifier. Your humidifier is designed to operate
effectively using hot, cold, hard or mechanically softened water.
Water used in homes contains varying amounts of minerals. The residue
remaining as a result of hard water evaporation is primarily calcium and
magnesium components and is usually quite hard, scaly, and dense.
Residue from softened water tends to be soft and fluffy and has a greater
volume than hard water scale. In either case, the service life of a Water Panel
evaporator will be virtually the same. The Water Panel evaporator should be
changed once a year with the exception of the Model 400 which should be
changed twice a heating season. In the drain-equipped models, most of these
solids are effectively controlled by flushing them down the drain.
Hot supply water, 140°F maximum, is recommended with drain type
humidifiers for increasing capacity and is required for heat pump applications.
RISK OF SCALDING. Water temperature over 125˚F can cause severe
burns and scald instantly. Shut off the hot water supply before
disconnecting or tapping into any hot water supply line.
WARNING
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