Lennox XC14 Installation Instructions Manual
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Lennox XC14 Installation Instructions Manual

Elite series
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E2008 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Improper
installation,
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
noncompliance.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox XC14 Engineering Handbook.
Coils previously charged with HCFC−22 must be
flushed.
04/08
*2P0408*
adjustment,
alteration,
may
be
levied
for
INSTALLATION
INSTRUCTIONS
®
Elite
Series XC14 Units
AIR CONDITIONER
505,367M
04/08
Supersedes 01/08

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Shipping and Packing List

Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1
Assembled outdoor unit.
1
Refrigerant flow control kit (Fixed Orifice)

XC14 Air Conditioner Units

The XC14 Air Conditioners, which will also be referred to in
this instruction as the outdoor unit, uses HFC−410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
XC14 Engineering Handbook.
This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
S
Thermal expansion valve (TXV)
S
Fixed orifice
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*P505367M*
Litho U.S.A.
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Summary of Contents for Lennox XC14

  • Page 1: Table Of Contents

    (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, XC14 Air Conditioner Units recycling or reclaiming must be followed. Fines The XC14 Air Conditioners, which will also be referred to in and/or incarceration levied this instruction as the outdoor unit, uses HFC−410A...

  • Page 2: Unit Dimensions

    (216mm) (241mm) 8.75" 8.25" (222mm) (210mm) 5.50" 13.50" (140mm) (343mm) XC14−030 TO −060 BASE WITH XC14−018 AND −024 BASE SECTIONS ELONGATED LEGS XC14 Dimensions − in. (mm) Model 31 (787) 27 (686) 28 (711) 31 (787) 30.50 (775) 35 (889) 13.875 (352)

  • Page 3: General Information

    1/6 TURN available from address shown below, or contact 11 12 11 12 your supervisor. Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379−9900 General Information Figure 1. Cap Tightening Distances NOTE − A label with specific torque requirements may be These instructions are intended as a general guide and do affixed to the stem cap.
  • Page 4 OUTDOOR UNIT (Uncased Coil Shown) OUTDOOR COIL HIGH PRESSURE PRESSURE LIQUID LINE SUCTION LINE GAUGE MANIFOLD SERVICE VALVE SERVICE VALVE FILTER DRIER HFC−410A COMPRESSOR DRUM Figure 3. Typical Manifold Gauge Connection Setup With Torque Wrench: Finger tighten and then Without Torque Wrench: Finger tighten and use an tighten per table 1.

  • Page 5: Recovering Refrigerant From Existing System

    Perform the following task at the existing outdoor unit: CYLINDER Disconnect line set at the service valves. OUTDOOR UNIT Disconnect electrical service at the disconnect switch. Figure 6. Typical Refrigerant Recovery (Method 1) Remove old outdoor unit. Page 5 XC14 SERIES...

  • Page 6: Removing Existing Outdoor Unit

    Positioning New Outdoor Unit INSTALL UNIT See Unit Dimensions on page 2 for sizing mounting slab, AWAY FROM WIN- DOWS platforms or supports. Refer to figure 7 for mandatory installation clearance requirements. TWO 90° ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION.
  • Page 7 ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY, 2 further, consider a different type of field−fabricated BRACKETS PER SIDE, 2" FROM EACH CORNER. framework that is sturdy enough for greater heights. Figure 12. Installing Stabilizer Brackets Page 7 XC14 SERIES...

  • Page 8: Removing And Installing Panels

    4. Holding the panel’s hinged side firmly in place, close IMPORTANT the right−hand side of the panel, aligning the screw holes. Unit Stabilizer Bracket Use (field−provided): IMPORTANT! Do not allow panels to hang on unit by top tab. Tab Always use stabilizers when unit is raised above the is for alignment and not designed to support weight of panel.

  • Page 9: New Or Replacement Line Set

    Pay close attention to line set isolation during If the XC14 is being used with either a new or existing installation of any HVAC system. When properly isolated indoor coil which is equipped with a liquid line which served from building structures (walls, ceilings.
  • Page 10 IMPORTANT - REFRIGERANT LINES MUST NOT CONTACT WALL. LIQUID LINE AUTOMOTIVE MUFFLER-TYPE OUTSIDE WALL SUCTION LINE HANGER WOOD BLOCK BETWEEN STUDS WIRE TIE INSIDE WALL STRAP NOTE − SIMILAR INSTALLATION SLEEVE PRACTICES SHOULD BE USED IF LINE SET IS TO BE INSTALLED WIRE TIE ON EXTERIOR OF OUTSIDE STRAP LIQUID LINE...

  • Page 11: Brazing Connections

    LIQUID LINE ASSEMBLIES (INCLUDES STRAINER) (10) copper tube stub and use another wet cloth LIQUID LINE ASSEMBLY underneath the valve body to protect the base paint. Also, shield the light maroon R−410A sticker. Figure 19. 69J46 Kit Components Page 11 XC14 SERIES...

  • Page 12: Flushing The System

    (Uncased Coil Shown) flushed prior to installation. Take care to empty all existing traps. Polyol ester (POE) oils are used in TWO PIECE PATCH PLATE LIQUID LINE Lennox units charged with HFC−410A refrigerant. STUB END (UNCASED COIL ORIFICE ONLY) HOUSING...

  • Page 13: Installing New Indoor Unit Metering Device

    Installing New Indoor Unit Metering PRESSURE PRESSURE Device SUCTION LINE SERVICE VALVE OUTDOOR XC14 units can be configured for use in with HFC−410A UNIT fixed orifice or TXV metering devices. This section CLOSED OPENED EXISTING provides instructions on installing either a fixed orifice or...
  • Page 14 100484−31 0.083 RING LINE XC14−060 11W11 100484−40 0.093 Use the Lennox catalog number to order a new or replacement fixed DISTRIBUTOR EQUALIZER orifice kit. ASSEMBLY LINE The fixed orifice kit includes the following components: LIQUID LINE ASSEMBLY WITH BRASS NUT...

  • Page 15: Testing For Leaks

    −048 and 060 91M02 100188−02 casing. Use the Lennox catalog number to order a TXV kit. The indoor unit TXV kit includes the following components: ON LINES SMALLER THAN SUCTION LINE 7/8", MOUNT SENSING BULB AT EITHER THE 3 OR 9 O’CLOCK POSITION.

  • Page 16: Evacuating The System

    NOTE − Normally, the high pressure hose is connected to 1. Connect manifold gauge set to the service valve ports as follows: the liquid line port; however, connecting it to the suction port better protects the manifold gauge set from high low pressure gauge to suction line service valve pressure damage.

  • Page 17: Servicing Outdoor Unit Delivered Void Of Charge

    It must be field−provided and installed (P−8−3251 or and to maintain separation of field installed low and equivalent) high voltage circuits as illustrated in figure 30. Page 17 XC14 SERIES...

  • Page 18: Start−Up And Charging Procedures

    NOTE − A complete unit wiring diagram is located inside the unit control box cover. Figure 32. Typical Wiring Diagram 6. Set the thermostat for a cooling demand. Turn on Start−Up and Charging Procedures power to the indoor blower and close the outdoor unit disconnect switch to start the unit.
  • Page 19 NOTE − *If line length is greater than 15 ft. (4.6 m), add this unit for charge information. amount. If line length is less than 15 ft. (4.6 m), subtract this amount. Figure 35. Using HFC−410A Weigh In TXV Method Page 19 XC14 SERIES...
  • Page 20 1. Confirm proper airflow across coil using figure 33. 65ºF 2. Compare unit pressures with table 7, Normal START: Measure outdoor ambient temperature Operating Pressures. ABOVE 3. Set thermostat to call for heat (must have a cooling load between 70-80ºF (21−26ºC). USE WEIGH-IN METHOD DO NOT CHARGE UNIT 4.
  • Page 21 If value is LESS than removed, retest to If value is MORE shown, MORE or confirm that unit is than shown, remove LESS refrigerant. properly charged. refrigerant. Figure 39. Using HFC−410A Superheat RFC Charge Method Page 21 XC14 SERIES...
  • Page 22 Table 6. HFC−410A Temperature (°F) − Pressure (Psig) °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig 100.8 137.1 178.5 231.6 290.8 365.0 545.6 445.9 102.9 139.6 181.6 235.3 295.1 370.0 451.8 552.3 105.0 142.2 184.3...

  • Page 23: System Operation

    A filter drier is factory-installed as illustrated in Unit your indoor unit’s filter is located. It will be either at the Dimensions on page 2, with each XC14 unit to ensure a indoor unit (installed internal or external to the cabinet) clean, moisture−free system.

  • Page 24: Optional Accessories

    Optional Accessories compressor. Fan Switch In AUTO or INT (intermittent) mode, the Refer to the Lennox XC14 Engineering Handbook for the − blower operates only when the thermostat calls for latest available accessories for this unit. Start−Up and Performance Checklist Job Name Job no.

This manual is also suitable for:

Xc14-018Xc14-024Xc14-030Xc14-036Xc14-042Xc14-048 ... Show all

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