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Aprilaire 550 - page 1
READ AND SA VE THESE INSTRUCTIONS Owner ’ s Manual For Models 400, 550, 600 & 700 Includes Safety & Operating Instructions and W arranty Information Automatic Humidifiers ...
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Aprilaire 550 - page 2
© Research Products Corporation 2003 T ABLE OF CONTENTS WARNING 120 volts may cause injury from electrical shock. Disconnect power and shut off water supply before servicing. CAUTION Sudden operation may cause personal injury or property damage. Turn the Aprilaire Humidifier Control to “OFF” or lowest setting before servicing. Introduction . . ...
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Aprilaire 550 - page 3
- 1 - Genuine Replacement Water Panel evaporators are available from your installing contractor or from most other heating and air conditioning contractors in your area. However, if you still have difficulty in obtaining a replacement Water Panel evaporator, use the dealer locator in our web site (www.aprilaire.com) or look in the Yellow Pages unde ...
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Aprilaire 550 - page 4
- 2 - With your purchase of a humidification system, you have invested in a humidifier that operates on the evaporative principle – nature’s own way of adding moisture – and will provide the proper relative humidity all during the heating season. It is very possible that you have questions concerning your new humidifier – questions on what ...
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Aprilaire 550 - page 5
- 3 - 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 maintena ...
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Aprilaire 550 - page 6
- 4 - II. OPERA TING INSTRUCTIONS – 400, 600 & 700 There are 2 possible modes of operation of your Aprilaire Humidifier Control – Automatic and Manual. An explanation of both modes follows: Automatic Mode: (Manual Mode-see pg 6) Your Aprilaire Humidifier Control is installed in the cold air return duct. During the first heating season, your ...
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Aprilaire 550 - page 7
- 5 - Your Aprilaire Automatic Humidifier, is a high precision system that will accurately maintain the relative humidity in your home. For every 1° change in outdoor temperature, the control will automatically adjust the indoor relative humidity (RH) by 1 / 2 %. If you would like to determine the RH in your home, follow these steps: 1. Determine ...
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Aprilaire 550 - page 8
- 6 - Manual Mode : (Automatic Mode – see pg 4) Your Aprilaire Humidifier Control is installed in the cold air return. It is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessive condensation. For example, with an outdoor temperature of 20° the correct setting will be 35% relative humidity. I ...
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Aprilaire 550 - page 9
- 7 - Your Aprilaire Humidifier Control is a precision instrument that can be used to determine the RH accurately in your home during the winter. To do this, follow these steps: 1. Activate the furnace blower by setting your thermostat to a higher temperature. 2. Turn the control dial setting to the “Off” position. Then, slowly turn the dial cl ...
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Aprilaire 550 - page 10
- 8 - 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. Water used in homes contains varying amounts of minerals. The residue remainin ...
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Aprilaire 550 - page 11
- 9 - VI. ANNUAL MAINTENANCE VII. ANNUAL SUMMER SHUTDOWN For best performance, we recommend that you replace the Water Panel evaporator in your Aprilaire Humidifier annually with the exception of Model 400 which should be changed twice a season. I f y o u h a ve a Humidifier Control equipped with a water panel timer, the “Change Water Panel” li ...
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Aprilaire 550 - page 12
- 10 - 1. Disconnect electrical power to the furnace and shut off water supply. 2. Disconnect the water line at the inlet compression nut. 3. Remove the in-line strainer from inside the inlet side of the valve by using a small nail or wire. 4. Flush the in-line strainer clean or replace with a new strainer, Service Department, Part No. 4004. 5. Rep ...
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Aprilaire 550 - page 13
- 11 - 1. Front Cover 2. Feed Tube 3. Integral Damper 4. Water Panel Evaporator Assembly 5. Distribution Tray 6. “V” Notches 7. Water Panel 8. Scale Control Insert/Float Chamber 9. Overflow Hose 10. Float Cover 11. Float 12. Water Level Sensor Assembly 1. Note Humidifier Control setting and turn dial to the “Off” position. 2. Turn off water ...
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Aprilaire 550 - page 14
- 12 - 1. Note Humidifier Control setting and turn dial to the “OFF” position. 2. Turn off water supply. 3. Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off base with both hands. Set aside. 4. Carefully pull the plastic feed tube (2) out of the distribution tray (5) at the top of the Water Panel evaporat ...
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Aprilaire 550 - page 15
- 13 - 4 5 6 7 8 9 1 2 3 1. Note Humidifier Control setting and turn dial to the “OFF” position. 2. Disconnect electrical power and turn off water supply. 3. Unlatch humidifier cover assembly (1) from base assembly (2) at the bottom of the cover, lift, and set aside. 4. Pull out the water panel evaporator assembly (3) by grasping at the top and ...
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Aprilaire 550 - page 16
- 14 - 1. Note Humidistat setting and turn dial to the “OFF” position. 2. At the side of the unit opposite the airflow duct pull front cover (1) off holding with both hands and set aside. 3. Carefully pull the plastic feed tube (2) out of the nozzle (3) at the top of the Water Panel evaporative assembly (4). Pull this assembly out by grasping a ...
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Aprilaire 550 - page 17
- 15 - Your Research Products Corporation Aprilaire ® Humidifier unit is expressly warranted for one (1) year from date of installation to be free from defects except, however, for the disposable Water Panel which will have to be replaced from time to time depending upon the amount of use. Research Products Corporation’s exclusive obligation und ...
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Aprilaire 550 - page 18
- 16 - The Aprilaire ® Indoor Air Comfort System is an integrated group of air quality enhancement products designed to work with your heating and cooling system to make your home more comfortable. For the best in indoor air quality, ask your heating and cooling contractor about these fine Aprilaire products, or visit us at www.aprilaire.com to so ...
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Aprilaire 550 - page 19
- 17 - Date Dealer Name SERVICE AND WA TER P ANEL REPLACEMENT RECORD ...
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Aprilaire 550 - page 20
Please… T ake a few minutes to visit us on-line at www .aprilaire.com to register your Aprilaire product. If you do not have on-line access, please mail a postcard with your name, address, phone number, product purchased and date of purchase to: Research Products Corporation P.O. BOX 1828 Madison, WI 53701 Thank you! Your Warranty Registration in ...
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