Lennox CBA25UH User Manual

©2017 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
507751-01
12/2017
Merit
®
Series
CBA25UH Air Handler Units
Shipping and Packing List
Package 1 of 1 contains:
1 – Assembled air handler unit factory-equipped for upow
or horizontal air discharge application (includes upow
and horizontal drain pans and preinstalled air lter).
Check the air handler for shipping damage; if found, im-
mediately contact the last carrier. Check the unit rating
plate to conrm that delivered unit matches order.
IMPORTANT: Special procedures are required for clean-
ing the all-aluminum coil in this unit. See page 18 in this
instruction for information.
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. For more details, refer to page 17 for unit sequence of operation.
1
SECOND
DELAY
OFF
100%
CFM
100%
CFM
45
SECS
COOLING
DEMAND
1
2
34
Table of Contents
Shipping and Packing List .............................................1
CBA25UH Unit Dimensions – Upow – Inches (mm) .....2
General Information .......................................................3
Requirements ................................................................3
Installation Clearances ..................................................4
Installation .....................................................................4
Condensate Drain...........................................................7
Duct System and Filters ...............................................8
Brazing Refrigerant Lines .............................................. 9
Sealing the Unit ...........................................................12
Electrical Connections ................................................. 12
Air Flow – Cooling Blower Speed ................................ 15
Check-out Procedures .................................................16
Operation ....................................................................17
Homeowner Maintenance ............................................17
Repairing or Replacing Cabinet Insulation ..................18
Professional Maintenance ...........................................18
Use of Air Handler During Construction .......................18

Lennox CBA25UH Specifications

General

Brand	Lennox
Model	CBA25UH
Category	Air Handlers
Language	English