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Genuine Aprilaire Replacement Water
Panel
®
evaporators are available from your
installing contractor or from most other
heating and air conditioning contractors in
your area. 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 peak
performance.
Thank you for your recent Aprilaire
®
Humidifier purchase. We appreciate your
business. You have invested in the highest quality equipment available.
Aprilaire manufacturers whole-house indoor air quality products and is a
recognized leader in the heating and air conditioning industry.
Your unit will require periodic maintenance to assure continued fine
performance. See page 8 to obtain service parts and/or replacement Water
Panel
®
evaporators.
This booklet will familiarize you with the benefits you will receive from the
equipment you just purchased and help you understand the routine
maintenance required. Be sure to register your Humidifier warranty online at:
www.aprilaire.com/warranty.
TABLE 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.
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Operating Instructions – Model 400, 600 & 700
• Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
• Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Operating Instructions – Model 550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Effect of Water Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Annual Summer Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Periodic Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
MAINTENANCE INSTRUCTIONS
Model 400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Model 600 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Model 700 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Model 550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
TABLE OF CONTENTS
TABLE OF CONTENTSINTRODUCTION