Aprilaire 720 Series - Table of Contents; Introduction; Register Your Humidifier

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Register Your Humidier ........................................2
PRINCIPLE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPERATING INSTRUCTIONS - MODEL 720A . . . . . . . . . . . . . . . . . . . . . . . . 3
Automatic Digital Humidier Control Indicator Lights.........3
Blower Activation................................................3
Automatic Mode ................................................3
Manual Mode....................................................4
Change Water Panel Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Test/Reset........................................................4
OPERATING INSTRUCTIONS - MODEL 720M. . . . . . . . . . . . . . . . . . . . . . . . 4
Check the Humidier Operation - Manual
Humidier Control...............................................5
TROUBLESHOOTING GUIDE .........................................5
EFFECT OF WATER CHARACTERISTICS .............................6
FAN SPEED ..........................................................6
ANNUAL MAINTENANCE ............................................6
Annual Summer Shutdown .....................................6
Maintenance Instructions.......................................6
LIMITED WARRANTY ................................................8
REGISTER YOUR HUMIDIFIER
Register your product at aprilaire.com/warranty
or by using the QR code, to receive important
updates and notications, and to streamline
the process in the unlikely event you le a claim.
Purchase only a genuine HydroCore™ to maintain
peak performance. For more information, visit our
website at aprilaire.com.
TABLE OF CONTENTS
WARNING
• ELECTRIC SHOCK HAZARD: 120 volts may cause serious
injury from electric shock. Disconnect electrical power
and water before servicing. Leave power and water
disconnected until service is completed.
• RISK OF SCALDING. Water temperature over 125°F (52°C)
can cause severe burns and scald instantly. Shut off the
hot water supply before disconnecting or tapping into
any hot water supply line.
CAUTION
• SUDDEN OPERATION MAY CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE. Turn the humidier control to OFF or
lowest setting before servicing.
• Shut off HVAC system and humidier before removing
cover. Loose particulate may irritate eyes.
INTRODUCTION
When humidity is properly controlled within a home, it
provides effective virus protection. Air that’s too dry can lead
to conditions that allow airborne viruses to thrive. By adding
humidity to dry air, the amount of time a virus can survive in
the air drops drastically. By maintaining balanced humidity
between 40% and 60% RH (relative humidity) year round, you
can reduce the airborne incidence of health concerns like
bacteria, viruses, and dust mites.
While 40% to 60% is ideal, this is hard to achieve in some
climates during cold months without potential condensation
damage to the home. Your AprilAire Humidier can help
maintain up to 45% RH, with a recommended range of 35% to
45% RH. As the temperature drops, the lower range may be
all a home can manage depending on various conditions
such as age of windows, air exchanges, insulation type, etc.
As temperatures warm, higher levels can be maintained. See
TAB LE 1 and TABLE 2 for guidelines.
Your humidier will require annual maintenance to assure
continued peak performance. Continue reading to learn more
about benets, maintenance, and operation of your humidier.
Register Your
Humidier
SERIAL NUMBER LOCATION
2 English