©2018 Lennox Industries Inc.
Dallas, Texas, USA
Page 1
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
INSTALLATION
INSTRUCTIONS
MULTI-POSITION AIR HANDLERS
507836-01
3/2018
Merit
®
Series
CBX25UH-T Air Handler Units
50 Hz
Shipping and Packing List
Package 1 of 1 contains:
1 – Assembled air handler unit factory-equipped for upflow
or horizontal air discharge application (includes upflow
and horizontal drain pans and
preinstalled air filter
).
Check the air handler for shipping damage; if found, im-
mediately contact the last carrier. Check the unit rating
plate to confirm that delivered unit matches order.
General Information
The CBX25UH air handler is designed for indoor instal-
lation only. As shipped, the unit is ready for installation
in either upflow, horizontal left-hand or right-hand air dis
-
charge applications. Air filters and other accessories are
available and listed in the CBX25UH Product Specification
bulletin (EHB) for ordering.
All units are shipped with a factory-installed check/expan-
sion valve.
This instruction is intended as a general guide and does
not supersede local or national codes in any way. Consult
authorities having jurisdiction before installation.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
IMPORTANT INFORMATION FOR INSTALLER
This unit has a delay relay that delays the supply blower “ON” for 1 second and keeps the blower “ON” for 45
seconds on all fan and cooling demands.
1
SECOND
DELAY
OFF
100%
L/s
100%
L/s
45
SECS
COOLING
DEMAND
1
2
3
4
