07/11
505,059M
(65937170)
*2P0711*
*P505059M*
Page 1
E
2011 Lennox Industries Inc.
Dallas, Texas, USA
TXV
RFC
RETAIN THESE INSTRUCTIONS
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 qualified installer or service agency.
CAUTION
Physical contact with metal edges and corners while
applying excessive force or rapid motion can result in
personal injury. Be aware of, and use caution when
working near these areas during installation or while
servicing this equipment.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs and 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.
IMPORTANT
This unit must be matched with an outdoor unit as spe-
cified in Lennox Engineering Handbook.
INSTALLATION
INSTRUCTIONS
CB(X)26UH(−R)
Series Units
AIR HANDLERS
505,059M (65937170)
07/11
Supersedes 05/11
Table of Contents
Shipping and Packing List
1
. . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CB(X)26UH Series Units
3
. . . . . . . . . . . . . . . . . . . . . . .
Requirements
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Clearances
4
. . . . . . . . . . . . . . . . . . . . . . . . .
Installation
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensate Drain
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duct System and Filters
8
. . . . . . . . . . . . . . . . . . . . . . . .
Connecting Refrigerant Lines
9
. . . . . . . . . . . . . . . . . . .
Sealing the Unit
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections
9
. . . . . . . . . . . . . . . . . . . . . . . . .
Airflow − Cooling Blower Speed
12
. . . . . . . . . . . . . . . . . .
Check−Out Procedures
15
. . . . . . . . . . . . . . . . . . . . . . . . .
Operation
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabinet Insulation
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
Package 1 of 1 contains the following:
1 − Assembled air handler unit for upflow or horizontal air
discharge application (includes upflow and horizontal
drain pans)
NOTE For downflow application, order kit 12W61
(0658731−75).
Check equipment for shipping damage. If found,
immediately report damage to the last carrier. Check the
unit rating plate to confirm that delivered unit matches
order.
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during installa-
tion, maintenance, or repair will expose you to fiberglass
wool. Breathing this may cause lung cancer. (Fiberglass
wool is known to the State of California to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and
eye irritation.
To reduce exposure to this substance or for further infor-
mation, consult material safety data sheets available
from address shown below, or contact your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
Litho U.S.A.
