Table of Contents
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E2011 Lennox Industries Inc.
Dallas, Texas, USA
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.
07/11
*2P0711*
TXV
RFC
INSTALLATION
INSTRUCTIONS
CB(X)26UH(−R) Series Units
AIR HANDLERS
505,059M (65937170)
07/11
Supersedes 05/11
Table of Contents
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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.
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
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WARNING
505,059M
*P505059M*
Litho U.S.A.
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(65937170)
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Table of Contents
Related Manuals for Lennox CB26UH series
Summary of Contents for Lennox CB26UH series
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Page 1: Table Of Contents
This unit must be matched with an outdoor unit as spe- Lennox Industries Inc. cified in Lennox Engineering Handbook. P.O. Box 799900 Dallas, TX 75379−9900 07/11... -
Page 2: Unit Dimensions
CB(X)26UH Unit Dimensions − inches (mm) 1 (25) LINE VOLTAGE RIGHT, LEFT AND TOP LOW VOLTAGE RIGHT SIDE ONLY AIR FLOW CONDENSATE DRAIN PIPING PLATE (4) (2−1/4 X 3−3/4) SUCTION LINE FILTER ACCESS LIQUID LINE 3/4 (19) (OPENING) (OPENING) 1-1/2 (38) 1-1/2 (38) 2-1/2 (64) 2-1/2 (64) -
Page 3: Cb(X)26Uh Series Units
Electrical wires should be sealed on the inside where they of Lennox air handler units (with or without optional electric exit the conduit opening. Sealant is required to prevent air heat), MUST conform with National Fire Protection... -
Page 4: Installation Clearances
This unit is approved for installation clearance to If a filter is to be installed at the air handler, early models combustible material as stated on the unit rating plate. require a filter rack be formed using factory−supplied Accessibility service clearances must take... - Page 5 For applications where return air ducting is to be Rotate the brackets 180º and reinstall using the same connected to the bottom of the coil blower, Lennox offers a screws. duct adapter kit which mounts on the filter door side of the end of the unit (shown in figure 2).
- Page 6 Figure 7. Field Modification for Right−Hand Discharge REFRIGERANT METERING DEVICE NOTE See the outdoor unit installation instructions and the Lennox Engineering Handbook for approved fixed orifice match−ups and application information. CB26UH−R units are equipped with a factory−installed refrigerant flow control (RFC) device (see table 1 on PLUGGED Page 3).
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Page 7: Condensate Drain
The coil has a fixed orifice in the liquid line (see figure 9). INSTALL CONDENSATE DRAIN Remove the rubber plug from the vapor line of the coil. 1. Remove appropriate drain knockouts. necessary, remove the indoor coil assembly from the O−RING cabinet. -
Page 8: Duct System And Filters
FEET (25MM PER 3 DIFFERENCES GENERALLY, TWO INCHES (51MM). METERS) *LENNOX P−TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J−TRAP 91P90. Figure 11. Typical Main and Overflow Drain TEST CONDENSATE DRAIN Table 3. Unit Air Filter Size Chart Test the drain pan and drain line after installation:... -
Page 9: Connecting Refrigerant Lines
A return air duct system is recommended. If the unit is WARNING installed in a confined space or closet, a return connection must be run, full size, to a location outside the closet. There must be an airtight seal between the bottom of the air handler and the return air plenum. - Page 10 protection, minimum circuit ampacity, as well as 5. Replace the air handler access panel. operating voltage. The power supply must be sized and protected CONNECT BLACK TO BLACK according to the specifications supplied on the product. CONNECT UNIT ’S YELLOW CONDUC- This air handler is factory−configured for 240 volt, TOR TO WHITE single phase, 60 cycles.
- Page 11 WARNING USE COPPER CONDUCTORS ONLY Figure 13. Wiring Diagram Page 11 CB(X)26UH SERIES...
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Page 12: Airflow Cooling Blower Speed
THERMOSTAT AIR HANDLER THERMOSTAT AIR HANDLER NOTE NOTE CONDENSING UNIT HEAT-ONLY APPLICATION COOLING-ONLY APPLICATION THERMOSTAT AIR HANDLER HEAT PUMP UNIT THERMOSTAT AIR HANDLER NOTE NOTE CONDENSING UNIT COOLING APPLICATION WITH ELECTRIC HEAT HEAT PUMP APPLICATION WITH ELECTRIC HEAT NOTE − Connect common wire only if required (Refer to the appropriate thermostat installation instructions) Figure 14. - Page 13 Table 4. CB(X)26UH Blower Performance (2−Speed) Air Volume at Specific Blower Taps Model External Static Pressure High (Black) Low (Red) in. w.g. 1020 −018 (LOW SPEED) 1040 1000 −024 (MEDIUM SPEED) 1350 1145 1290 1090 −030 1225 1030 (MEDIUM 1150 SPEED) 1065 1560...
- Page 14 Table 5. CB(X)26UH Blower Performance (3−Speed) Air Volume at Specific Blower Taps Model Ext. Static Pressure Low (Red) Med (Blue) High (Black) in. w.g. 0.10 1074 0.20 1000 0.30 −018 0.40 (LOW SPEED) 0.50 0.60 0.10 1074 0.20 1000 −024 0.30 (MEDIUM 0.40...
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Page 15: Check−Out Procedures
Set the thermostat 5ºF higher than the indoor Check−out Procedures temperature. The indoor blower and outdoor unit should cycle off. IMPORTANT CHECK ELECTRIC HEATER (IF USED) Set thermostat to call for auxiliary heat (approximately During installation, service or maintenance, make sure 5°F above ambient temperature). -
Page 16: Maintenance
The temperature/humidity difference between the Contact your Lennox dealer for the following accessories: inside and outside of the cabinet can cause condensation Electric Heat Kit See the accessory kit label on the...