TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Effect of Water Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Models *HUMD500A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Replacement Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
WARNING
Disconnect power and shut off water supply before servicing.
CAUTION
property damage. Turn humidistat or Humidifier Control to "OFF" or
lowest setting before servicing
120 volts may cause injury from electrical shock.
Sudden operation may cause personal injury or
- 00 -