Lennox CBX27UH Installation Instructions Manual
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Lennox CBX27UH Installation Instructions Manual

Elite series
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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 personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a 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, 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 INFORMATION TO INSTALLER
BLOWER HOUSING
SUPPORT PAD
HORIZONTAL DRAIN PAN (SEE PAGES 4
AND 6)
07/11
*2P0711*
CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.
TOP CAP SHIPPING
BRACKET (REPLACE
SCREWS IN TOP CAP
AFTER REMOVAL)
D
REFRIGERANT LINE PLUGS
(SEE PAGE 6)
Page 1
INSTALLATION
INSTRUCTIONS
®
Elite
Series CBX27UH
Units
MULTI−POSITION AIR HANDLERS
506294−01
07/11
Supersedes 05/11

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DRIP SHIELD FOR −060 UNITS ONLY
HORIZONTAL APPLICATIONS (SEE
PAGE 5).
*P506294-01*
Litho U.S.A.
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506294−01
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15

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Summary of Contents for Lennox CBX27UH

  • Page 1: Table Of Contents

    CBX27UH Up−flow/Down−flow Unit Dimensions . . . CAUTION CBX27UH Horizontal LH/RH Unit Dimensions ..General Information ......

  • Page 2: Cbx27Uh Up−Flow/Down−Flow Unit Dimensions

    CBX27UH Up−flow and Down−flow 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)

  • Page 3: Cbx27Uh Horizontal Lh/Rh Unit Dimensions

    CBX27UH Horizontal Left− and Right−Hand Unit Dimensions − Inches (mm) 5-3/8 FILTER (137) (51) LIQUID Horizontal Position LINE (Right-Hand Air SUCTION CONDENSATE LINE Discharge) DRAINS (2) (UP−FLOW Coil BLOWER 1-1/8 DOWN−FLOW) (29) CONDENSATE 4-3/8 DRAINS (2) (HORIZONTAL) (111) FOR DIMENSIONS A" THROUGH H", SEE CHART ON PAGE 2.

  • Page 4: General Information

    In addition to conforming to manufacturer’s installation listed in table 1. instructions and local municipal building codes, installation of Lennox air handler units (with or without optional electric heat), shall conform with the following National Fire Protection Association (NFPA) standards: NFPA No.
  • Page 5 Also check to make sure that no debris has fallen FRONT VIEW END VIEW into the drain pan during installation that may plug up the drain opening. Figure 3. Suspending Horizontal Unit Page 5 CBX27UH SERIES...

  • Page 6: Brazing Connections

    The air handler’s coil line sizes are listed in table 2. Use 10. Install the horizontal shield (−060 model) on the front Lennox L15 (sweat) series line sets (refer to the outdoor edge of the horizontal drain pan as illustrated in figure unit Engineering Handbook for proper size, type and 5 on page 6.

  • Page 7: Installing The Condensate Drain

    Figure 6. Brazing Connections After removal of drain pan plug(s), check drain hole(s) to NOTE − CBX27UH series air handlers use nitrogen or verify that drain opening is fully open and free of any dry air as a holding charge. If there is no pressure when debris.

  • Page 8: Inspecting And Replacing Filters

    FEET (25MM PER 3 GENERALLY, TWO INCHES (51MM). METERS) *LENNOX P−TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J−TRAP 91P90. Figure 8. Typical Main and Overflow Drain BEST PRACTICES Filters may be duct−mounted or installed in the cabinet. A filter is installed at the factory.

  • Page 9: Sealing The Unit

    These settings are for nominal tonnage match−ups with the Make sure the liquid line and suction line entry points are CBX27UH units. When matched with other sizes, it is sealed with either the provided flexible elastomeric thermal recommended that the CFM be adjusted to approximately insulation, or field provided material (e.g.

  • Page 10: Air Handler Performance

    Table 6. CB(X)27UH Air Handler Performance [in. w.g. − external static pressure expressed in inches water gauge; cfm − cubic feet/minute; W − watts] Air Volume with Motor Watts at 208V Air Volume with Motor Watts at 230V Size Tap 1 Tap 2 Tap 3 Tap 4...

  • Page 11: Making Electrical Connections

    10. WIRING CONNECTIONS NOTE Units are approved for use only with copper conductors. 1. Install line voltage power supply to unit from a properly Ground unit at disconnect switch or to an earth ground. circuit breaker. Page 11 CBX27UH SERIES...
  • Page 12 TO INCREASE MOTOR SPEED, DISCONNECT GRN WIRE AND CONNECT YEL WIRE. MOTOR SPEED TAPS 1 AND 2 Figure 10. Motor Speed Taps (208/230V, Single Phase) TO INCREASE MOTOR SPEED, DISCONNECT GRN WIRE AND CONNECT YEL WIRE. MOTOR SPEED TAPS 1 AND 2 Figure 11.
  • Page 13 Figure 12. Typical System Wiring Diagram (208/230V, Single and Three Phase) Page 13 CBX27UH SERIES...
  • Page 14 Figure 13. Typical System Wiring Diagram 460V, Single and Three Phase (−036, −048 and −060 only) Page 14 506294−01...

  • Page 15: Repairing Or Replacing Cabinet Insulation

    If using foil-faced insulation, any cause an electric shock hazard that could cause cut, tear, or separations in the insulation surface must be personal injury or death. taped with a similar foil−faced tape. Page 15 CBX27UH SERIES...

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