Lennox International Inc LENNOX Elite Series XP13 Units HEAT PUMPS 3FLUSHING Line SET

Page 15

Indoor Refrigerant Metering Device Removal and Flushing Line Set and Indoor Coil

Flushing is only required when the existing system used HCFC−22 refrigerant. If the existing system used HFC−410a, then remove the original indoor coil metering device and proceed to Installing New Indoor Metering Device on page 16.

TYPICAL EXISTING FIXED ORIFICE

TYPICAL EXISTING EXPANSION VALVE REMOVAL

REMOVAL PROCEDURE (UNCASED

OR 1BPROCEDURE (UNCASED COIL SHOWN)

1A COIL SHOWN)

 

 

STUB END

 

DISTRIBUTOR TUBES

TWO PIECE PATCH PLATE

LIQUID LINE

CHECK

(UNCASED COIL ONLY)

 

ORIFICE

EXPANSION

LIQUID LINE ORIFICE HOUSING

 

DISTRIBUTOR

HOUSING

VALVE

 

 

 

TEFLON® RING

TUBES

 

TEFLON®

 

 

RING

FIXED ORIFICE

 

 

 

BRASS NUT

DISTRIBUTOR ASSEMBLY

REMOVE AND DISCARD

WHITE TEFLON® SEAL

(IF PRESENT) LIQUID LINE ASSEMBLY (INCLUDES STRAINER)

AOn fully cased coils, remove the coil access and plumbing panels.

BRemove any shipping clamps holding the liquid line and distributor as- sembly.

CUsing two wrenches, disconnect liquid line from liquid line orifice hous- ing. Take care not to twist or damage distributor tubes during this pro- cess.

TEFLON®

RINGSENSING

LINE

DISTRIBUTOR EQUALIZER

ASSEMBLY LINE

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

MALE EQUALIZER

 

 

LINE FITTING

VAPOR

 

 

LIQUID

SENSING BULB

LINE

LINE

 

 

 

DRemove and discard fixed orifice, valve stem assembly if present and Teflon® washer as illustrated above.

EUse a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

AOn fully cased coils, remove the coil access and plumbing panels.

BRemove any shipping clamps holding the liquid line and distributor assembly.

CDisconnect the equalizer line from the check expansion valve equalizer line fitting on the vapor line.

2CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE

DRemove the vapor line sensing bulb.

EDisconnect the liquid line from the check expansion valve at the liquid line assembly.

INVERTED HCFC−22

GAUGE

CYLINDER CONTAINS

MANIFOLD

CLEAN HCFC−22 TO BE

 

A USED FOR FLUSHING.

 

1

LOW

HIGH

VAPOR LINE

NEW

SERVICE VALVE

OUTDOOR

 

UNIT

OPENED CLOSED

EXISTING

INDOOR

UNITB

LIQUID LINE SERVICE

VALVE

RECOVERY

 

CYLINDER

TANK

 

RETURN

 

VAPOR LIQUID

C

DISCHARGE

D

 

 

INLET

 

 

 

 

 

 

RECOVERY MACHINE

FDisconnect the check expansion valve from the liquid line orifice housing. Take care not to twist or damage distributor tubes during this process.

GRemove and discard check expansion valve and the two Teflon® rings.

HUse a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

3FLUSHING LINE SET

The line set and indoor unit coil must be flushed with at least the same amount of clean refrigerant that previously charged the system. Check the charge in the flushing cylinder before proceeding.

ASet the recovery machine for liquid recovery and start the recovery machine. Open the gauge set valves to allow the recovery machine to pull a vacuum on the existing system line set and indoor unit coil.

BInvert the cylinder of clean HCFC−22 and open its valve to allow liquid refrigerant to flow into the system through the vapor line valve. Allow the refrigerant to pass from the cylinder and through the line set and the indoor unit coil before it enters the recovery machine.

AInverted HCFC−22 cylinder with clean refrigerant to the vapor service valve.

BHCFC−22 gauge set (low side) to the liquid line valve.

CHCFC−22 gauge set center port to inlet on the recovery machine with an empty recovery tank to the gauge set.

DConnect recovery tank to recovery machines per machine instructions.

CAfter all of the liquid refrigerant has been recovered, switch the recovery machine to vapor recovery so that all of the HCFC−22 vapor is recovered. Allow the recovery machine to pull down to 0 the system.

DClose the valve on the inverted HCFC−22 drum and the gauge set valves. Pump the remaining refrigerant out of the recovery machine and turn the machine off.

Figure 10. Removing Indoor Refrigerate Metering Device and Flushing Procedures

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XP13 SERIES

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Contents Table of Contents Shipping and Packing ListGeneral TOP View Unit Dimensions − Inches mmModel Number Identification 13 −036 − 230 −08 Side ViewPLUMBING, Switches Sensor Components Typical Unit Parts ArrangementControl Panel Caps and Fasteners Torque Requirements Operating Gauge Set and Service ValvesOperating Service Valves Using Manifold Gauge SETOperating Angle−Type Service Valve Operating Ball−Type Service ValveReinstall Stem Cap Method Method 2 Limitations Recovering Refrigerant from Existing System1DISCONNECT Power 3RECOVERING RefrigerantNew Outdoor Unit Placement Placement, Slab Mounting and Stabilizing Unit Detail a Outside Unit PlacementRemoving and Installing Panels Louvered Panel InstallationLouvered Panel Removal Adding Polyol Ester OIL Requirements NEW or Replacement Line SET InstallationUsing Existing Line SET Line Set RequirementsRefrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 2CAP and Core Removal 1CUT and DeburPreparation for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SET3FLUSHING Line SET 2CONNECT Gauges and Equipment for Flushing ProcedureEqualizer Line Installation Installing New Indoor Metering DeviceIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Line Set and Indoor Coil Connect Gauge SETTest for Leaks 2EVACUATE the System Evacuating Line Set and Indoor Coil24VAC Transformer Size Circuit and Install Disconnect2INSTALL Thermostat ElectricalTypical Unit Wiring Diagram Unit START−UP Unit Start−UpLeak CHECK, Repair and Evacuate Connect Manifold Gauge SET and WEIGH−IN ChargeConnections for Optimizing System Charge Calculating System Charge for Outdoor Unit Void of Charge Using HFC−410A Weigh In MethodCFM = Optimizing ProcedureAdjusting Indoor Airflow Optimizing System Refrigerant ChargeRefrigerant SATº LIQºSCº If subcooling value isNormal Operating Pressures − Liquid +10 and Vapor +5 Psig HFC−410A Temperature F − Pressure Psig System Operation Defrost SystemDefrost Control CMC1 OFF Indoor Coil MaintenanceDealer Indoor UnitXP13 Series Sequence of Operation Thermostat Start−Up and Performance ChecklistInstaller City Job Name Job no Date Job Location City

LENNOX Elite Series XP13 Units HEAT PUMPS, 06/11 50672801 specifications

Lennox International Inc., a leading name in the HVAC (heating, ventilation, and air conditioning) industry, has a reputation for delivering high-quality and energy-efficient systems. One of the standout products in their lineup is the Lennox Elite Series XP13 heat pump, model number 50672801. This heat pump is designed to provide exceptional comfort throughout the year while offering efficiency and reliability that homeowners can depend on.

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