Table of Contents
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©2017 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects, or other
reproductive harm.
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.
IMPORTANT: Special procedures are required for cleaning the all-aluminum coil in this unit. See page 15 in this instruction
for information.
IMPORTANT INFORMATION FOR INSTALLER
CHECK FOR AND REMOVE THESE ITEMS BEFORE OPERATING UNIT.
BLOWER HOUSING
SUPPORT PAD
HORIZONTAL DRAIN PAN (SEE PAGES 4
AND 6)
D
REFRIGERANT LINE PLUGS
(SEE PAGE 6)
INSTALLATION
INSTRUCTIONS
Elite
CBA27UHE Air Handler Units
MULTI-POSITION AIR HANDLERS
507674-01
3/2017
Table of Contents
Unit Dimensions .............................................................3
General Information .......................................................4
Shipping and Packing List .............................................4
Requirements ................................................................4
Installing the Unit ...........................................................4
Brazing Connections .....................................................6
Installing the Condensate Drain ....................................7
Inspecting and Replacing Filters ...................................8
Sealing the Unit .............................................................8
Measuring Static Pressure ............................................9
Adjusting the Blower Speed ..........................................9
Making Electrical Connections ....................................12
Repairing or Replacing Cabinet Insulation ..................15
Homeowner Maintenance ............................................15
Check-Out Procedures ................................................16
TOP CAP SHIPPING
BRACKET (REPLACE
SCREWS IN TOP CAP
AFTER REMOVAL)
DRIP SHIELD. (USED FOR -060 UNITS HORIZONTAL
APPLICATIONS ONLY.) (SEE PAGE 5.) SHOWN
INSTALLED ON DRAIN PAN IN -060 UNIT.
Page 1
Series
®
D
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Summary of Contents for Lennox CBA27UHE-018
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS ©2017 Lennox Industries Inc. Dallas, Texas, USA Elite Series ® THIS MANUAL MUST BE LEFT WITH THE CBA27UHE Air Handler Units HOMEOWNER FOR FUTURE REFERENCE MULTI-POSITION AIR HANDLERS WARNING 507674-01 3/2017 This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. -
Page 2: Cba27Uhe Upflow And Downflow Unit Dimensions
CBA27UHE Upflow and Downflow Unit Dimensions – Inches (mm) PIPING PLATE DETAIL 3/4 (19) (FOR UP-FLOW AND DOWN-FLOW POSITIONS) 5/8 (16) SUPPLY AIR OPENING 4 3/8 (111) 1 1/8 (29) SUCTION LINE CONDENSATE DRAINS 5/8 (16) 5/8 (16) (2) (HORIZONTAL) 3/4 (19) Return Air Opening... -
Page 3: Cba27Uhe Horizontal Left- And Right-Hand Discharge Unit Dimensions
CBA27UHE Horizontal Left- and Right-Hand Discharge Unit Dimensions – Inches (mm) 5 3/8 FILTER (137) (51) Horizontal Position LIQUID LINE (Right Hand Air SUCTION CONDENSATE Discharge) LINE DRAINS (2) (UP-FLOW Coil BLOWER 1 1/8 DOWN-FLOW) (29) CONDENSATE 4 3/8 DRAINS (2) (111) FOR DIMENSIONS “A”... -
Page 4: General Information
In addition to conforming to manufacturer’s installation in- unit stand as listed in table 1. structions and local municipal building codes, installation of Lennox air handler units (with or without optional elec- tric heat), shall conform with the following National Fire Protection Association (NFPA) standards: •... - Page 5 HORIZONTAL RIGHT-HAND DISCHARGE 1/2" SCREWS MAXIMUM APPLICATION ELECTRICAL INLET CLEARANCE 4" (102 mm) ANGLE IRON OR Use the following procedures to configure the unit for hor- SHEET METAL izontal right-hand discharge operations: NOTE – For horizontal applications, a secondary drain pan is recommended.
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Page 6: Brazing Connections
The air handler’s coil line sizes are listed in table 2. Use the coil end plate engaging holes. Misaligned screws may Lennox L15 (sweat) series line sets (refer to the outdoor damage the coil. unit Product Specifications (EHB) for proper size, type 9 - From the upflow position, flip cabinet 90º... -
Page 7: Installing The Condensate Drain
8 - Refer to instructions provided with outdoor unit for WARNING leak testing, evacuating and charging procedures. Danger of explosion! 9 - Install access panel. Can cause equipment damage, injury, or TABLE 2. Refrigerant Line Sizes death. Liquid Vapor Model Line Sets When using a high pressure gas such as dry Line... -
Page 8: Inspecting And Replacing Filters
METERS) LENNOX P-TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J-TRAP 91P90. PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4” I. D. X 5” - 34K7401 (1): CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MA IN DRAIN. -
Page 9: Measuring Static Pressure
Make sure the liquid line and suction line entry points are These settings are for nominal tonnage match-ups with sealed with either the provided flexible elastomeric ther- the CBA27UHE units. When matched with other sizes, it is mal insulation, or field provided material (e.g. Armaflex, recommended that the CFM be adjusted to approximately Permagum or equivalent). - Page 10 BLOWER DATA CBA27UHE-018 BLOWER PERFORMANCE External Air Volume and Motor Watts Static Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Pressure Watts Watts Watts Watts Watts in. w.g. CBA27UHE-024 BLOWER PERFORMANCE External Air Volume and Motor Watts Static...
- Page 11 BLOWER DATA CBA27UHE-042 BLOWER PERFORMANCE External Air Volume and Motor Watts Static Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Pressure Watts Watts Watts Watts Watts in. w.g. 1282 1346 1497 1489 1723 1143 1278 1475 1461 1690 1067 1233 1447...
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Page 12: Making Electrical Connections
NOTE – Connect conduit to the unit using a proper con- Making Electrical Connections duit fitting. Units are approved for use only with copper conductors. A complete unit wiring diagram is located on WARNING the back side of the unit’s access panel. Run 24V Class II wiring only through specified low 3 - Install low voltage wiring from outdoor to indoor unit voltage opening. - Page 13 FIGURE 11. Typical System Wiring Diagram Page 13...
- Page 14 FIGURE 12. Typical System Wiring Diagram – 460V, Single- and Three-Phase Units (-036, -048 and -060 only) Page 14...
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Page 15: Repairing Or Replacing Cabinet Insulation
(less than 50psi). If the coil cannot be cleaned using water alone, Lennox recommends use of a coil cleaner with a pH in the range of 5 to 9. The coil must be rinsed thoroughly after cleaning. -
Page 16: Check-Out Procedures
Use of Air Handler During Construction could cause damage? Lennox does not recommend the use of its air handler unit • Have ALL unused drain pan ports been properly during any phase of construction. Very low return air tem-... - Page 17 Installing Contractor’s Name_______________________ Installing Date_______________________________ Installing Contractor’s Phone_______________________ Air Handler Model #___________________________ Job Address____________________________________ Thermostat Line Voltage SUPPLY Disconnect Switch Integrated Control Temperature Duct Blower Motor Amps System Electric Heat Amps Duct Static RETURN Filter Drain Line DUCT SYSTEM TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil SUPPLY AIR DUCT...
- Page 18 Installing Contractor’s Name_______________________ Installing Date_______________________________ Installing Contractor’s Phone_______________________ Air Handler Model #___________________________ Job Address____________________________________ Line Voltage Disconnect Switch Thermostat Integrated Control Duct System Duct System Filter RETURN SUPPLY Electric Heat Amps Blower motor Amps Drain Line Duct Static Temperature DUCT SYSTEM TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil...
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Questions and answers
My unit collects the condensate in the pan below while the gravity lines are unclogged what is the problem
If the Lennox CBA27UHE-018 unit collects condensate in the pan while the gravity drain lines are unclogged, a possible problem could be the lack of a required vent in the drain line. The vent must extend at least two inches above the height of the coil drain pan. Without proper venting, air pressure can prevent proper drainage, causing water to back up into the pan.
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