Installation, Start-Up, and Operating Instructions
NOTE: Read the entire instruction in manual applicable to
specific unit before starting the installation.
This symbol → indicates a change since the last issue.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, distributor, or branch
for information or assistance. The qualified installer or agency
must use factory-authorized kits or accessories when modifying
this product. Refer to the individual instructions packaged with the
kits or accessories when installing.
Unit must not be installed where freezing temperatures could
occur. Do not install unit on the furnace or fan coil jacket. Do
not install unit where ends of cooling coil could restrict
airflow to the humidifier. Condensation damage could occur
if home has closed-off, unheated rooms.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special require-
INSTALLATION OF HUMCCLBP2018-A--
Carrier’s HUMCCLBP2018-A-- bypass humidifier can be in-
stalled on either the supply or return plenum of a forced-air system.
This unit requires an external bypass duct between the supply- and
Recognize safety information. This is the safety-alert symbol
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
It is recommended to install the humidifier where it can be easily
serviced. If this humidifier is installed with a central cooling
system the bypass duct must have a shutoff damper to close during
the cooling season. Always install humidifier downstream of an
electronic air cleaner.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Tab 7a 9a
Catalog No. 03HU-MC1
Printed in U.S.A.