Aprilaire 440, 350, 360, 760, 445, 560, 220, 112, 768, 224 owner manual

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not trapped by the replaceable Water Panel evaporator are flushed down the drain. The drain also eliminates the problems caused by stagnant water. This is the most effective and least expensive method to dispose of trouble-causing minerals.

There are some homes where drain facilities are not accessi- ble or available. For these situations, or where high water hardness is not a problem, specially designed Aprilaire Humidifiers, Models 448 and 445, are available, incorporating a water recirculating system.

Capacity is high because an average-size home (10,000 cu. ft.) requires the addition of approximately 9 gallons of water per day to maintain 35% relative humidity when the outside temperature is 20°. The smallest Aprilaire Humidifier under most operating conditions, has this humidifying capacity. Trouble- free performance and minimum maintenance are assured by the design features of the Aprilaire Humidifier. All unit housing parts that come in contact with water are non-metal and will never rust or corrode. Neither heat nor water will affect them under normal operating conditions.

The Water Panel evaporator, designed especially for uniform, high evaporation, and the Scale Control Insert also efficiently traps mineral deposits which are often the cause of damage to working parts in ordinary humidifiers. No “white dust” can be distributed throughout the living quarters. The Water Panel evap- orator is the heart of the unit and must be in good condition to assure high capacity trouble-free performance. It should be changed annually.

The granular coating in the bottom of the distribution tray is designed to provide equal distribution of the water to each of the openings assuring an even flow of water over the Water Panel evaporator. Do not clean the mineral scale off the bottom of the water distribution tray at the end of the humidification season. The scale itself provides an excellent track for the water to follow. This is actually what we try to simulate with the synthetic coating in the bottom of the tray. If the coating is removed, it is not necessary to purchase a new distribution tray or upper housing. You can accomplish the same uniform performance by applying a small amount of liquid dishwashing detergent over the entire lower surface of the water distribution tray. This will allow the water to flow evenly through each of the openings, provided, of course, the unit is level in order to achieve maximum capacity.

There are many humidifiers on the market. They all add moisture . . . with varying degrees of efficiency. None, however, can provide the features, design, and performance incorporated into your Aprilaire Humidifier.

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Contents Table of Contents Maintenance InstructionsIntroduction Your Humidifier Page Automatic Humidifier Control Manual humidistat-see pg Operation GuideOutdoor Temperature ºF Setting Dial % Relative Humidity GuideManual Humidistat Automatic Humidifier Control see pg Outdoor-Indoor Relative HumidityIII. Effect of Water Characteristics Additional InformationIV. Annual Maintenance Annual Summer ShutdownVI. Periodic Preventative Maintenance Inspection Service InstructionsFor Aprilaire Humidifier ModelsModels Aprilaire Humidifier Model Maintenance Instructions Inlet Grille 110-112 Model Limited Warranty Aprilaire Zone Control Systems Aprilaire Fresh Air Exchangers Electronic ThermostatsService and Water Panel Replacement Record
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