Lennox XP15-024 Installation Instructions Manual
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Lennox XP15-024 Installation Instructions Manual

Xp15 series heat pump units
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E2009 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Improper
installation,
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
This unit must be matched with an indoor coil as
specified in Lennox' Engineering Handbook.
Coils previously charged with HCFC−22 must be
flushed.
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.
06/09
*2P0609*
adjustment,
alteration,
may
be
levied
for
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
Collection XP15 Units
HEAT PUMP UNITS
505,328M
06/09
Supersedes 05/09

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XP15 Outdoor Unit

The Lennox XP15 outdoor units use HFC−410A
refrigerant. This unit must be installed with a matching
indoor coil and line set as outlined in the Lennox
Engineering Handbook. XP15 series outdoor units are
designed for use in check expansion valve (CTXV)
systems only, and are not designed to be used with other
refrigerant flow control devices. The Lennox Engineering
Handbook lists compatible indoor CTXV kits which are
ordered separately.

Shipping and Packing List

1 − Assembled XP15 outdoor unit
1 − Bushing (for low voltage wiring)
2 − Grommets (for liquid and vapor lines)
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
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*P505328M*
®
Litho U.S.A.
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Summary of Contents for Lennox XP15-024

  • Page 1: Table Of Contents

    The Lennox XP15 outdoor units use HFC−410A refrigerant. This unit must be installed with a matching indoor coil and line set as outlined in the Lennox This unit must be matched with an indoor coil as Engineering Handbook. XP15 series outdoor units are specified in Lennox’...

  • Page 2: Unit Dimensions

    Sheet metal screws 16 in.− lb. 2 NM your supervisor. Machine screws #10 28 in.− lb. 3 NM Lennox Industries Inc. Compressor bolts 90 in.− lb. 10 NM P.O. Box 799900 Gauge port seal cap 8 ft.− lb. 11 NM Dallas, TX 75379−9900...
  • Page 3 USING MANIFOLD GAUGE SETS 2. Connect gauge to the service port. HFC−410A refrigerant manifold gauge sets must be 3. When testing is completed, replace service port cap and capable of handling higher system operating pressures. tighten as follows: The gauge set shall be rated for use with pressures of 0 − With Torque Wrench: Finger tighten and then 800 psig on the high side, and a low side of 30 inches of tighten per table 1 on page 2.

  • Page 4: Recovering Refrigerant From Existing System

    Operating Ball−Type Service Valve Recovering Refrigerant from Existing To Access Ball−Type Service Port: HCFC−22 System A service port cap protects the service port core from Remove existing HCFC−22 refrigerant using one of the contamination and serves as the primary leak seal. following methods: 1.

  • Page 5: Positioning New Outdoor Unit

    3. When the low side system pressures reach 0 psig, close the vapor line valve. Install unit away 4. Disconnect all power to the existing outdoor unit. from windows Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system.

  • Page 6: Removing Panel

    With unit positioned at installation site, remove two side PREVAILING louvered panels to expose the unit base pan. Install the WINTER WINDS brackets as illustrated in figure 10 using conventional WIND BARRIER practices; replace the panels after installation is complete. 24"...

  • Page 7: Electrical Connections

    MAINTAIN MINIMUM PANEL ANGLE (AS CLOSE TO PARALLEL WITH THE UNIT AS POSSIBLE) WHILE INSTALLING PANEL. HOLD DOOR FIRMLY ALONG THE HINGED SIDE TO MAINTAIN ANGLE MAY BE TOO FULLY−ENGAGED TABS EXTREME PREFERRED ANGLE FOR INSTALLATION REMOVE 4 SCREWS TO REMOVE PANEL FOR ACCESSING COMPRESSOR AND CONTROLS.
  • Page 8 CONTROL BOX CONTACTOR GROUND LUG DEFROST CONTROL BOARD (DCB) GROUND LENNOX SYSTEM OPERATION MONITOR (LSOM) 208−230/60/1 CAPACITOR K1−1 COMPRESSOR CONTACTOR WARNING! − ELECTRIC SHOCK HAZARD. Can cause INJURY or DEATH. Unit must be grounded in accordance with national and local codes.

  • Page 9: New Or Replacement Line Set

    (29 mm) Fabricated Field refrigerant piping consists of liquid and vapor lines from the outdoor unit (sweat connections) to the indoor unit INSTALLING LINE SET coil (flare or sweat connections). Use Lennox L15 (sweat, Line Isolation This reference illustrates non−flare) series line sets, or use field−fabricated procedures, which ensure proper refrigerant line set refrigerant lines as listed in table 3.
  • Page 10 IMPORTANT - OUTSIDE WALL REFRIGERANT LINES MUST LIQUID LINE NOT CONTACT WALL. VAPOR LINE ANCHORED HEAVY NYLON WIRE TIE WOOD BLOCK BETWEEN STUDS WIRE TIE WALL STUD INSIDE WALL STRAP NOTE − SIMILAR SLEEVE INSTALLATION PRACTICES SHOULD BE STRAP LIQUID LINE WIRE TIE USED IF LINE SET IS TO TO VAPOR LINE...

  • Page 11: Brazing Line Set Connections

    ISOLATION GROMMETS underneath the valve body to protect the base paint. Also, shield the light maroon R−410A sticker. Locate the provided isolation grommets. Slide grommets onto vapor and liquid lines. Insert grommets into mullion to 5. Flow regulated nitrogen (at 1 to 2 psig) through the isolate refrigerant lines from sheet metal edges.

  • Page 12: Removing Service Valve Port Core

    Polyol ester (POE) oils are used in 4. Weigh in a trace amount of HFC−410A. [A trace Lennox units charged with HFC−410A refrigerant. amount is a maximum of two ounces (57 g) refrigerant Residual mineral oil can act as an insulator, or three pounds (31 kPa) pressure].

  • Page 13: Installing New Refrigerant Metering Device

    Two gauge sets (one for HCFC−22; one for XP15 units are used in check thermal expansion valve HFC−410A). (CTXV) systems only. See the indoor unit coil installation instructions and the Lennox Engineering Handbook for INVERTED HCFC−22 CYLINDER CONTAINS CLEAN HCFC−22 TO approved CTXV match−ups and application information.

  • Page 14: Installing Service Valve Port Core

    Expansion valves equipped with Chatleff type fittings are 1. Connect manifold gauge set to the service valve ports available from Lennox. Refer to the Engineering as follows: Handbook for CTXV kits for use with specific match−ups.

  • Page 15: Start−Up Procedures

    manifold gauge center port hose from vacuum pump. 4. Replace the stem caps and tighten as specified in Attach the manifold center port hose to a dry nitrogen Operating Service Valves on page 3. cylinder with pressure regulator set to 150 psig (1034 5.
  • Page 16 DISTRIBUTOR NOTE − ARROWS INDICATE OUTDOOR UNIT DIRECTION OF REFRIGERANT FLOW REVERSING VALVE CHECK EXPANSION VALVE BI−FLOW FILTER / OUTDOOR DRIER COIL HIGH MUFFLER PRESSURE PRESSURE INDOOR UNIT LIQUID SERVICE PORT VAPOR GAUGE MANIFOLD SERVICE PORT LIQUID LINE VAPOR LINE HFC−410 VALVE VALVE...
  • Page 17 1 Check the airflow as illustrated in figure 26 to be sure the indoor airflow is as SUBCOOLING required. (Make any air flow adjustments before continuing with the following procedure.) 2 Measure outdoor ambient temperature; determine whether to use cooling mode or heating mode to check charge.
  • Page 18 Table 6. XP15−024 Table 9. XP15−042 Target Target *Add *Add Subcooling Subcooling charge charge INDOOR MATCHUPS INDOOR MATCHUPS Heat Heat Cool Cool Heat Heat Cool Cool (+5ºF) (+1ºF) (+5ºF) (+1ºF) CH23−51 C33−44C CBX27UH−030−230 CH33−62D CB30U−31 CBX27UH−042−230 CBX32M−030 CBX27UH−048−230 CBX32M−036 CB30U−51*P CBX32MV−024/030 CBX32M−048 CBX32MV−036...

  • Page 19: System Operations

    645.0 Replacement filter driers must be suitable for use with INSTALLING SERVICE VALVE CAPS HFC−410A refrigerant. Disconnect gauge set and re−install all service valve caps. Lennox System Operation Monitor (LSOM) OUTDOOR UNIT INSTALL CAPS SERVICE VALVE The LSOM detects the most common fault conditions in the system.
  • Page 20 LSOM LED Troubleshooting Codes Table 13. Status LED Status LED Status LED Troubleshooting Information Condition Description Green Power LED ON LSOM has power 24VAC control power is present at the LSOM terminal. Determine/verify that both R and C LSOM terminals are connected and voltage is present Green Power LED OFF LSOM not powering up at both terminals.

  • Page 21: Defrost System

    Pressure Switch Connections The L connection is used to communicate alert codes to the room thermostat. On selected Lennox SignatureStatt The unit’s automatic reset pressure switches (LO PS − S87 thermostats, a blinking check LED will display on the room and HI PS −...
  • Page 22 High−Pressure Switch compressor, and the strike counter in the DCB will count one strike. Line output 24VAC service light output. 24VAC typically used to supply power to the Lennox System 24 Volt output Operation Monitor (LSOM) Page 22 505328M 06/09...
  • Page 23 24 TUBES WIRE TIE 12 TUBES SLEEVE AMBIENT SENSOR − Extend tip of plastic sensor just outside of plastic sleeve. Place ambient sensor and wire from DCB inside of plastic sleeve and route through gap between corner post and coil support as shown.
  • Page 24 TEST CALIBRATION See Figure 33 for details concerning Test Mode The DCB is considered uncalibrated when power is operations. applied to the DCB, after cool mode operation, or if the coil temperature exceeds the termination temperature when it NORMAL is in heat mode. The DCB monitors the O line, to determine the system DEFROST operating mode (heat/cool), outdoor ambient temperature,...
  • Page 25 Placing the jumper on the test pins allows the technician to: JUMPER Clear short cycle lockout Clear five−strike fault lockout Cycle the unit in and out of defrost mode Place the unit in defrost mode to clear the coil When Y1 is energized and 24V power is being applied to the Demand Defrost Control, a test cycle can be initiated by placing a jumper on the Demand Defrost Control’s TEST pins for 2 to 5 seconds.

  • Page 26: Maintenance

    1. Air Filter Ask your Lennox dealer to show you where NOTE − If ambient or coil fault is detected, the DCB will not your indoor unit’s filter is located. It will be either at the execute the TEST mode.
  • Page 27 HEAT PUMP OPERATION maintain predetermined comfort settings. Many heat Your new Lennox heat pump has several characteristics pump thermostats are also equipped with an emergency that you should be aware of:...

  • Page 28: Start−Up And Performance Checklist

    PROGRAMMABLE THERMOSTATS Check for any blown fuses or tripped circuit breakers. Your Lennox system controlled Make sure unit access panels are in place. programmable thermostat. These thermostats provide the Make sure air filter is clean. added feature of programmable time-of-day setpoints for If service is needed, locate and write down the unit both heating and cooling.

This manual is also suitable for:

Xp15-030Xp15-042Xp15-048Xp15-060Xp15-036

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