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5. Remove the black plastic distribution tray (5) from the evaporative assembly by unsnapping the white plastic holding strips from the tabs at the end of the tray. Lightly scrape out any calcium deposits and clean the “V” notches (6), but do not scrape off the granular coating from the bottom. This textured surface helps ensure even water flow for maximum performance. See page 2 if removed. 6. Slide the Water Panel evaporator (7) out from the white plastic Scale Control Insert (8). Clean the Sc

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Soaking the tray in vinegar or a lime-removing agent is helpful when trying to remove stubborn mineral deposits. For trays with granular coating: Do not scrape off the granular coating, but lightly scrape out any mineral deposits and clean the “V” notches. This textured surface helps ensure even water flow for maximum performance. See page 3 if removed. 6. Slide the Water Panel evaporator (7) out from the plastic Scale Control Insert (8). Clean the insert frame by twisting and flexing it to loos

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5. Remove the black distribution tray (4) from the evaporative assembly (3) by unsnapping the white plastic holding strips from the tabs at the end of the tray. Lightly scrape out any calcium deposits and clean the “V” notches (5) but do not scrape off the granular coating from the bottom. This textured surface helps ensure even water flow for maximum performance. 6. Slide the Water Panel evaporator (6) out from the white plastic scale control insert (7). Clean the insert frame by twisting and f

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Materials Provided and Not Provided . . . . . . . . . . . . . . . . . . 3 Electrical Specifications, Capacities and Weights . . . . . . . . 4 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Overview of Humidifier Operation . . . . . . . . . . . . . . . . . . . . . 7 INSTALLATION Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Setting Slide Switches. . . . . .

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................................................................................................................................................................................ AIRFLOW PROVING SWITCH INSTALLATION INSTRUCTIONS Description: FIGURE 20 The airflow proving switch is a safety device that will prevent the humidifier from producing steam when there is no airflow present in the HVAC system. The switch is a pressure differential measuring device that determines if there is airflow present

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For multiple lamps, the reading would be a multiple of this value, i.e., with two lamps installed, the amp reading will be at least 300 mA. f. If the lamp is operating correctly, remove the ammeter from the wiring and put back any access panels that were removed during this procedure. If the lamp is not operating correctly, refer to the ‘Troubleshooting’ section of this manual. Note: If other electrical components or accessories share the same circuit as the UV lamp(s), the current draw will be

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Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 II. Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 III. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Installation of External Mount Rooftop Units (Models 1952 & 1953) . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Installation of Internal Mount Rooftop Units (Model 1972) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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If you would like to determine the RH in your home, follow these steps: 1. Determine the outdoor temperature. 2. Activate the furnace blower by setting your thermostat fan switch to the “On” position, or setting your thermostat to a higher temperature. 3. Turn the control dial setting to the “Off” position. Then, slowly turn the dial clockwise until you hear the solenoid valve “click on.” Next, slowly turn the dial counter clockwise until you hear the solenoid valve “click off.” At this point, m

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READ AND SAVE THESE INSTRUCTIONS ® HUMIDIFIERS The Best Cure For Dryness® OWNER’S MANUAL FOR MODELS 768, 760, 568, 560, 558, 550, 448, 445, 360, 350, 110, 112, 220, 224, & 440 Includes Safety, Operating and Maintenance Instructions and Warranty TABLE OF CONTENTS PAGE Introduction ................................................Inside Front Cover Principle of Operation ............................................................1 Operating Instructions •Automatic Humidifier Control...............

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The operating principle of your Aprilaire humidifier provides all of these advantages. Here, briefly, is the method: Except for Models 350 and 360, the Aprilaire humidifier is installed to operate in conjunction with the heating, ventilating, air conditioning equipment (HVAC) blower motor. When the Aprilaire humidifier Control calls for humidity and the blower motor is operating, water flows to the distribution tray located at the top of the humidifier. The water is uniformly distributed across





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