American Standard 200A, 500A, 300A III . Effect of Water Characteristics, Additional Information

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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. Generally, the furnace and blower motor must be operating for the humidifier control to function. After the humidifier has operated for several minutes and water is entering the unit and coming out at the drain, reduce the humidifier control 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 temperature. Follow the suggested settings prior to a drop in the outside temperature.

Additional Information

Be sure to keep fireplace dampers closed when not in use. They provide an excellent escape route for heat, as well as humidity. Humidity is lost at an even faster rate than heat because water vapor tends to seek its own level and your humidifier would not be able to replace it even when running at full capacity.

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 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 potentially damaging excess moisture.

III . 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. Because of the humidifier’s design, most of these solids are effectively controlled by flushing them down the drain.

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. The service life of a Humidifier Pad may be extended by using hard water, but in either case, the Humidifier Pad should be changed once a year. This is why proper maintenance is important and necessary. Service hot water 140°F maximum, is recommended with drain type units for increasing capacity.

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Contents Humidifiers Table of Contents Introduction How Your Humidifier OperatesYour Humidifier Important Notes About Your Humidifier II. Operating Instructions Operation GuideDetermine the outdoor temperature % Relative Humidity GuideOutside Temperature Recommended RH Outdoor-Indoor Relative HumidityIII . Effect of Water Characteristics Additional InformationIV. Annual Maintenance Annual Summer ShutdownVI. Periodic Preventive Maintenance Inspection and Service InstructionsSet humidifier or control to its original position Humidifier Model *HUMD500A Limited Warranty Humidifier HUMD0200A, 300A, 500AService and Humidifier PAD Replacement Record