![background image](http://html.mh-extra.com/html/aprilaire/400-series/400-series_owners-manual_2956015001.webp)
READ AND SAVE THESE INSTRUCTIONS
Includes Safety, Operating and Maintenance
Instructions and Warranty
TABLE OF CONTENTS
PAGE
Introduction............................................................................1
Principle of Operation ............................................................2
Operating Instructions
•Automatic Mode................................................................4
•Manual Mode ....................................................................6
Effect of Water Characteristics ..............................................8
Annual Maintenance ..............................................................9
Annual Summer Shutdown ....................................................9
Periodic Preventative Maintenance .......................................9
MAINTENANCE INSTRUCTIONS
Models 400.......................................................................11
Model 600 ........................................................................12
Model 700 ........................................................................13
Limited Warranty..................................................................14
Replacement Record .....................................................18, 19
AUTOMATIC HUMIDIFIER
The Best Cure For Dryness
®
®
FOR MODELS 400, 600, & 700
OWNER’S MANUAL