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Thank you for your recent Aprilaire
®
humidifier purchase. We appreciate
your business and are pleased to add your name to our growing list of
customers. You have invested in the highest quality equipment available.
Aprilaire manufactures whole-house indoor air quality products and is a
recognized leader in the heating and air conditioning industry.
Your humidifier will require periodic maintenance to assure continued fine
performance. See page 11 to obtain service parts and/or replacement
Water Panel
®
evaporators.
Now, please take a few minutes and read this booklet. This will familiarize
you with the benefits you will receive from the equipment you just
purchased and help you understand the routine maintenance that will be
required.
Be sure to register your humidifier warranty online at:
www.aprilaire.com/warranty.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Operating Instructions – Models 400A, 400M, 500A, 600A & 700A . . . . .4
• Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
• Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating Instructions – Models 350, 360, 500M, 600M & 700M . . . . . .9
Check the Humidifier Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Additional Information for All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Effect of Water Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Annual Summer Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Periodic Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
MAINTENANCE INSTRUCTIONS
Models 350 & 360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Models 400A & 400M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Models 500A & 500M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Models 600A & 600M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Models 700A & 700M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
TABLE OF CONTENTS INTRODUCTION
CAUTION
Sudden operation may cause personal injury or property
damage. Turn the Aprilaire Humidifier Control to “OFF” or
lowest setting before servicing.
WARNING
120 volts may cause injury from electrical shock.
Disconnect power and shut off water supply before servicing.
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.