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Installation . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .page 4
System Checkout . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .page 18
Troubleshooting Guide . . .. . .. . .. . . .. . .. . . .. . .. . .. .page 20
TABLE OF CONTENTS
WARNING
1. 120/240 volts may cause serious injury from
electrical shock. Disconnect electrical power to the
furnace and humidifier before starting installation.
2. Sharp edges may cause serious injury from cuts.
Use care when cutting plenum openings and
handling ductwork.
CAUTION
1. Do not set humidifier higher than recommended.
Condensation damage may result.
2. Do not set humidity up to recommended levels if
there is condensation on the inside of windows of
any unheated living space. Condensation damage
may result.
3. Do not mount the Humidifier Control on the supply
plenum or duct. The unit cannot withstand the
plenum temperatures and will malfunction.
4. When installing the Humidifier Control on a
counterflow furnace, ensure the blower continues to
run after the heat call is satisfied to eliminate high
temperatures from damaging the Humidifier Control.
5. Do not mount the Humidifier Control downstream of
the bypass outlet. False humidity conditions will
cause the humidifier to operate incorrectly.
6. Avoid installing the Humidifier Control with the
display facing downward to prevent the Humidifier
Control from incorrectly measuring the relative
humidity (RH) in the duct.
THESE INSTALLATION INSTRUCTIONS
ARE FOR THE APRILAIRE
®
AUTOMATIC DIGITAL
HUMIDIFIER CONTROL ONLY!
For Aprilaire
®
humidifier installation,
follow Aprilaire Humidifier Installation Instructions.