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Aprilaire 400 Owner's Manual

Aprilaire owner's manual automatic humidifiers 400, 550, 600, 700
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Automatic Humidifiers
Owner's Manual
For Models 400, 550, 600 & 700
Includes Safety & Operating Instructions
and Warranty Information
READ AND SAVE THESE INSTRUCTIONS

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  Summary of Contents for Aprilaire 400

  • Page 1 Automatic Humidifiers Owner’s Manual For Models 400, 550, 600 & 700 Includes Safety & Operating Instructions and Warranty Information READ AND SAVE THESE INSTRUCTIONS...
  • Page 2: Table Of Contents

    Model 400 ........
  • Page 3: Introduction

    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 under Humidifying Apparatus or Heating & Air Conditioning Contractors. Purchase only genuine Aprilaire Water Panels to maintain performance.
  • Page 4: Principle Of Operation

    The drain also eliminates the problems caused by stagnant water. There are some homes where drain facilities are not accessible or available. For these situations, or where high water hardness is not a problem, the newest Aprilaire, Model 400, is designed to satisfy these applications. - 2 -...
  • Page 5 It should be changed once a year with the exception of the Model 400 where it should be changed twice a heating season. Older design water distribution trays have a granular coating in the...
  • Page 6: Operating Instructions - Model 400, 600 & 700

    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 Humidifier Control needs to be set initially to match your home’s condition.
  • Page 7 Aprilaire Humidifier. 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...
  • Page 8: Manual Mode

    “5” on the dial range, then the RH in your home is 35%. 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.
  • Page 9 The furnace blower motor must be operating and the furnace calling for heat for the Aprilaire Humidifier to function. Note: Turning the knob to “Test/Reset” resets the “Change Water Panel” internal timer. After the...
  • Page 10: Operating Instructions - Model 550

    The service life of a Water Panel evaporator may be extended by using hard water. In either case, the Water Panel evaporator is usually 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.
  • Page 11: Annual Maintenance

    VII. ANNUAL SUMMER SHUTDOWN 1. For Models 400, 550, and 600 close the bypass damper, which is a part of the unit, with the use of the small damper handle. For older Model 550s without a built in damper, closer the bypass which is installed in the bypass pipe.
  • Page 12: Periodic Preventative Maintenance

    VIII. PERIODIC PREVENTATIVE MAINTENANCE NOTE: Periodic inspection and preventative maintenance of your total heating system is important for efficient and safe operation. Your heating contractor should include humidifier service at the same time. All models are equipped with an in-line water strainer and orifice as shown below.
  • Page 13: Maintenance Instructions

    8. Check the condition of the feed tube and replace if tube is damaged or brittle. 9. Slide a new Aprilaire No. 45 water panel into the scale control insert/float chamber. Snap the distribution tray back on the scale control insert.
  • Page 14: Model 600

    Replace the Water Panel evaporator (Stock No. 35) and with a new Genuine Aprilaire Water Panel. Slide the Water Panel back into the scale control insert with the colored spot up and snap the distribution tray back into place.
  • Page 15: Model 700

    Control Insert by twisting and flexing it to loosen the calcium deposits. Replace the Water Panel evaporator (Stock No. 35) and with a new Genuine Aprilaire Water Panel. Slide the Water Panel evaporator back into the scale control insert with the colored spot up and snap the distribution tray (4) back into place.
  • Page 16: Model 550

    Replace the Water Panel evaporator (Stock No. 10) and with a new Genuine Aprilaire Water Panel. Slide the pad back into the insert frame with color mark up and snap the distributor tray back into place.
  • Page 17: Limited Warranty

    LIMITED WARRANTY 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.
  • Page 18 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 solve your Indoor Air Comfort needs. Aprilaire ®...
  • Page 19: Replacement Record

    SERVICE AND WATER PANEL REPLACEMENT RECORD Date Dealer Name - 17 -...
  • Page 20: Thank You

    WARRANTY REGISTRATION Please… Take 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.

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550600700